Anyone care to guess...

[VetteVet]

what I'm up to?

http://i827.photobucket.com/albums/zz195/vettevet/383/411wiring_zps66e47c8d.jpg

Luckily, I've got a great GF who doesn't mind me working on the dining room table. [-X

[Kevin]

you know they have these wireless router things now...you don't have to rewire your computer to try and get online these day

[VetteVet]

you know they have these wireless router things now...you don't have to rewire your computer to try and get online these day

Damn, Kevin!! I wish that I had consulted with you before I went through all of that.

[cvette98pacecar]

Piggy backing your ECM.

[VetteVet]

You're close Robert, but not quite. Stand-alone it will hopefully be. Plug and play,.....not just yet.

[batchman]

And there I thought you were trying to graft an electronically controlled overdrive transmission into a 1986 diesel F350. Oh wait, that's me!

Looks more promising than my exercise at the moment, Best of luck!
- Jeff

[FU]

Splicing ECM's together ?

[XfireZ51]

Been there. Re-pinning.

[alwayscode390]

You're close Robert, but not quite. Stand-alone it will hopefully be. Plug and play,.....not just yet.

That's what I was going to guess.

The SYTY guys use "code59" and it unlocks the stock computer so you can tune it yourself. Is that a universal deal with OBD1?

Neat , good luck :) ---

[VetteVet]

That's what I was going to guess.

The SYTY guys use "code59" and it unlocks the stock computer so you can tune it yourself. Is that a universal deal with OBD1?

Neat , good luck :) ---

I'm working on swapping to a '411 LS1(Gen III) PCM, so it will actually be an OBD2 car when I'm done. Forced induction/nitrous/launch control/torque management/adaptive octane spark control/full OBD2 diagnostics capable. Dynamic fueling parameters to better account for wall wetting/evaporation during transient throttle/load conditions. Can be tuned by any of the LS tuners out there(tons of them). I could go on and on.

Down the road? 58x Gen IV PCM with all of the above, plus the capability to control Variable Valve Timing hardware. I'm not gonna say any more about that right now.

[VetteVet]

Oh, I almost forgot. Built in transmission controller with the ability to handle most of the GM electronic transmissions out there.

PCM with your tune burned in can be had for about $110.00.

[XfireZ51]

Jep,

Good luck. This would be cool. Let me know if I can help.

[GOLDCYLON]

Wow just wow. This is the way forward. OBD2 ='s bluetooth wireless scanning and tuning on the fly capabilities as possibilities reguardless of the platform.

GL Jep !!!!! :cheers:

[alwayscode390]

PCM with your tune burned in can be had for about $110.00.

It would be a direct replacement for the obd1 computers wiring and everything? ---

[XfireZ51]

It would be a direct replacement for the obd1 computers wiring and everything? ---

Nothing is a "direct replacement" other than another OEM ECM. You need to re-pin and "translate" your current calibration into the
parameters used by the LSx PCM. For stock motors that could be done and copied for other stock motors. Otrherwise each is a custom tune.
Having said that, thank you Jep for blazing the trail.

[alwayscode390]

The chip/ tune part you mentioned makes sense... but I wasn't sure about the actual wiring harness from the computer to the engine. ---

[VetteVet]

Nothing is a "direct replacement" other than another OEM ECM. You need to re-pin and "translate" your current calibration into the
parameters used by the LSx PCM. For stock motors that could be done and copied for other stock motors. Otrherwise each is a custom tune.
Having said that, thank you Jep for blazing the trail.

Well said, Dom.

I'm working with a spare harness right now. Here is the plan:

1. Finish re-pinning and adding the needed additional wiring.
2. Burn a compatible stock tune into the PCM.
3. Hook up the modified harness to my spare set of LT5 sensors.
4. Hook up engine harness to my car and power up.
5. Use a signal generator to provide crank, cam and speed signals to PCM.
5. Scan the PCM to make sure that I'm getting rational values and outputs are being triggered correctly.
6. Check functionality of my solution to the PCM/CCM communication problem.
7. If all is good to this point, I will install the crank reluctor and sensor and replace the harness/ECM on my car with the modified harness/411 PCM. Plan is also to run COP pencil coils(smart ones).
8. Modify the stock tune with values that should get the engine up and running reasonably well.
9. Tune as required to get engine running well on primaries only.
10. Install custom PCM operating system to allow control of secondaries.
11. Tune secondary maps.
12. If all is well to this point, finalize and install cam sensor solution to allow for misfire detection. FYI, the 411 PCM is sophisticated enough to run perfectly with no cam sensor. No cam sensor only results in slightly longer crank times(may take one revolution instead of 30 degrees). It does not resort to firing of injectors or coils in pairs or anything like that. The ONLY thing lost without a cam sensor is misfire detection.

All of this is based on stuff from the internet....and you know that they can't [-X put it on the internet if it's not true.

Jep

[VetteVet]

It looks like I may have sourced the COP ignition coils. They are a very good fit. The ridged seal is a snug fit in the spark plug hole and the length is almost right on the money. They are smart coils, so there should be no problem controlling them with the LS1 PCM.

http://i827.photobucket.com/albums/zz195/vettevet/COP4_zps76526596.jpg

http://i827.photobucket.com/albums/zz195/vettevet/COP2_zps0c4cfcce.jpg

http://i827.photobucket.com/albums/zz195/vettevet/COP3_zps84027689.jpg

I'm going to pick one up(I borrowed this one) and verify that the PCM can control it.

Jep

[XfireZ51]

Jep,

Very cool. What are they off of? GM? Am I looking at 3 or 4 pins?

[Blue Flame Restorations]

Well said, Dom.

I'm working with a spare harness right now. Here is the plan:

1. Finish re-pinning and adding the needed additional wiring.
2. Burn a compatible stock tune into the PCM.
3. Hook up the modified harness to my spare set of LT5 sensors.
4. Hook up engine harness to my car and power up.
5. Use a signal generator to provide crank, cam and speed signals to PCM.
5. Scan the PCM to make sure that I'm getting rational values and outputs are being triggered correctly.
6. Check functionality of my solution to the PCM/CCM communication problem.
7. If all is good to this point, I will install the crank reluctor and sensor and replace the harness/ECM on my car with the modified harness/411 PCM. Plan is also to run COP pencil coils(smart ones).
8. Modify the stock tune with values that should get the engine up and running reasonably well.
9. Tune as required to get engine running well on primaries only.
10. Install custom PCM operating system to allow control of secondaries.
11. Tune secondary maps.
12. If all is well to this point, finalize and install cam sensor solution to allow for misfire detection. FYI, the 411 PCM is sophisticated enough to run perfectly with no cam sensor. No cam sensor only results in slightly longer crank times(may take one revolution instead of 30 degrees). It does not resort to firing of injectors or coils in pairs or anything like that. The ONLY thing lost without a cam sensor is misfire detection.

All of this is based on stuff from the internet....and you know that they can't [-X put it on the internet if it's not true.

Jep

Jep, just stay away form the French models! LOL

[VetteVet]

Jep, just stay away form the French models! LOL

You didn't say anything about the French model's girlfriend, though. HEHEHE;)

[Blue Flame Restorations]

That commercial cracks me up everytime I see that smirk on the French Model's face.

Jep, that project sounds promising. Excellent R&D!!

[VetteVet]

Jep,

Very cool. What are they off of? GM? Am I looking at 3 or 4 pins?

Dom,

They are not GM. They are from a high horsepower, high revving 5.3L V8. I'm not going to say any more at this time.

They are 3 pins. BAT+, GND and trigger. Trigger high to start dwell period, trigger low to cut primary current and fire the coil. I have a scope so I can get data on dwell as installed in the OEM application. This data can be used to populate the cells in the LS1 PCM coil dwell table.

Jep

[-=Jeff=-]

This will be quite cool.. especially if it works with the CCM

[XfireZ51]

Dom,

They are not GM. They are from a high horsepower, high revving 5.3L V8. I'm not going to say any more at this time.

They are 3 pins. BAT+, GND and trigger. Trigger high to start dwell period, trigger low to cut primary current and fire the coil. I have a scope so I can get data on dwell as installed in the OEM application. This data can be used to populate the cells in the LS1 PCM coil dwell table.

Jep

Part of the issue w the LT 5 ignition module and LS coils. No way to modify dwell. The LS coils use 4 wires w +, power ground, ECM ground, and trigger.

[VetteVet]

Part of the issue w the LT 5 ignition module and LS coils. No way to modify dwell. The LS coils use 4 wires w +, power ground, ECM ground, and trigger.

Dom,

I can understand that, since dwell is entirely controlled by the ICM. The dwell tables in the LS1 PCM will allow folks to choose what coils they want and tailor the PCM to properly trigger them as long as:
a) the coils have built in driver circuits (smart coils) or external driver circuits are used and
b) the coils or external driver circuits use a TTL level trigger.

I know that you and others here understand this, I'm just spelling it out for the benefit of others who are reading.

Don't hold me to this, but my intent is to have my car in BG running on the 411 PCM with full cluster, cruise, etc. functionality with secondaries deleted and COP pencil coils installed. I may or may not achieve that goal. We'll see.

Assuming that all of that goes well, I will begin work on a solution that integrates full secondary functionality. That will take more time, though, as it will probably involve modification of the PCM code.

Jep

[-=Jeff=-]

how is this progressing?

[cvette98pacecar]

It looks like I may have sourced the COP ignition coils. They are a very good fit. The ridged seal is a snug fit in the spark plug hole and the length is almost right on the money. They are smart coils, so there should be no problem controlling them with the LS1 PCM.

http://i827.photobucket.com/albums/zz195/vettevet/COP4_zps76526596.jpg

http://i827.photobucket.com/albums/zz195/vettevet/COP2_zps0c4cfcce.jpg

http://i827.photobucket.com/albums/zz195/vettevet/COP3_zps84027689.jpg

I'm going to pick one up(I borrowed this one) and verify that the PCM can control it.

Jep

Jep, Got an add on for you. Anyone out there want to make up a CNC aluminum din rail to hide the wiring? Could be held down by cam cover bolts. This could be fully customized with any logo added to the top.

[VetteVet]

Jep, Got an add on for you. Anyone out there want to make up a CNC aluminum din rail to hide the wiring? Could be held down by cam cover bolts. This could be fully customized with any logo added to the top.

Robert,

I've already ordered and received the 6061 aluminum bar stock to do this. I will have to do the first set manually on a friend's milling table, but once I get the fit(notice that I din't use "fitment") worked out, I will produce a cad file for reproduction.

Jep

[VetteVet]

how is this progressing?

Jeff,

1) I'm finishing up the wiring harness mods.
2) I have ordered and received one of the COP coils pictured previously to be used for testing.
3) Today I received my EFILive FlashScan V2 and software to load up the base tune and for follow-on tuning.
4) As stated in my previous post, I have the aluminum bar stock to machine the billet coil/wiring covers(rails).
5) I have received the stock needed to machine the crankshaft reluctor mount. I still need to obtain the stock for the sensor mount.
6) I have started working on the base tune to get the car up and running.
7) I'm still waiting on a benchtop programming harness(to load tunes onto PCMs while removed from the car) and flanged Deutsch connectors to attach the coil rails to the coil harnesses.
8) I think I've found a suitable PCM bracket, but haven't ordered it yet.

To all,

Keep your eyes on the For Sale section. I will be posting some stock parts up within the next few days. All profits from these sales will be dedicated to funding this project.

Thanks for your interest and support,
Jep

[Kevin]

Dom,

They are not GM. They are from a high horsepower, high revving 5.3L V8. I'm not going to say any more at this time.

They are 3 pins. BAT+, GND and trigger. Trigger high to start dwell period, trigger low to cut primary current and fire the coil. I have a scope so I can get data on dwell as installed in the OEM application. This data can be used to populate the cells in the LS1 PCM coil dwell table.

Jep

gt500?

[VetteVet]

gt500?

They're from an outboard, believe it or not.

Damn, the "French model" commercial just came on again.

Jep

[-=Jeff=-]

Hey JEp,

how is the ECM swap/conversion coming along?

[Funracer]

After reading this thread I realize I am truly a Z idiot.

A Zidiot?

You men keep up the good work. :saluting:

[XfireZ51]

Jep,

I thought all the LSx coils were 4 wire. Did you chose the 3 wire due to form factor? Is the 411 going to support a 3 wire setup? Sounds like you and Scott may have some collaborating to do. :)

[VetteVet]

Sorry for not posting any updates on this project. I went for quite a stretch there working 7 days a week and in the evenings as well. In addition to my day job, I was getting the offshore boat and two tunnel boats ready for racing season. Now that most of the racing stuff is done, I can get back to the forum and have at least some time to devote to the PCM project.

I'll post up all of the latest info within a day or two.

Thanks for the patience.

Jep

[XfireZ51]

Jep,

Any chance u could provide disassembly of ALDL? Be worthwhile to be able to output params that currently are not.

[VetteVet]

Jep,

Any chance u could provide disassembly of ALDL? Be worthwhile to be able to output params that currently are not.

Dom,

That one is easy to do. There is an ALDL data stream table. Each entry is the memory address where the value to be output is stored. The table is arranged from the first ALDL output word to the last. It just requires identifying what parameter you don't need, finding it's location in the table and then substituting the address of the data that you want to output in it's place. Once that's done, modify the data stream definition file for whatever scanner software that you are using (I use TunerPro) to reflect the name of the new parameter and specify units and scaling.

What year is your Black Rose? I can get you the table location if you need it.

Jep

[XfireZ51]

92. I'm using the $D0A mask

[VetteVet]

Dom,

Look at address 08BB (if viewing an unstacked BIN file) or 88BB (if viewing a stacked one). You should see 80 00 80 01. These values correspond to the addresses of the PROM ID MSB and LSB, which is the addresses where the PROM ID is stored. Each additional pair of bytes will correspond to the memory address where the next data stream item is stored in memory.

Assuming that you are using the BPPA binary, the following table lists the address that the ECM retrieves the value from(column 1), the position in the data stream(column 2) and the description of the data item(column 3). If you view the values starting at 08BB(or 88BB), you should see the values in column 1(assuming that I didn't make any mistakes typing them in).

8000 01 PROMIDA PROMID (MSB)
8001 02 PROMIDA+1 PROMID (LSB)
0003 03 MALFFLG1 MALF FLAG WORD 1
0004 04 MALFFLG2 MALF FLAG WORD 2
0005 05 MALFFLG3 MALF FLAG WORD 3
0006 06 MALFFLG4 MALF FLAG WORD 4
0007 07 MALFFLG5 MALF FLAG WORD 5
0001 08 NVMW1 NON - VOLATILE MODE WORD
0002 09 NVMW2 NON - VOLATILE MODE WORD
0067 10 CARSMW MODE WORD FOR COMPUTER AIDED RATIO SELECTION LOGIC
0048 11 FMDBYTE 1 FMD BYTE 1 MODE WORD
0049 12 FMDBYTE 2 FMD BYTE 2 MODE WORD
004D 13 MW1 MINOR LOOP MODE WORD 1
004E 14 MW2 MINOR LOOP MODE WORD 2
004F 15 MW3 MINOR LOOP MODE WORD 3
0052 16 LCCPMW LCC & CCP MODE WORD
0054 17 CLCCMW MAJOR LOOP MODE WORD
0055 18 AIRMW MAJOR LOOP MODE WORD
005D 19 MWFA1 FUEL AIR MODE WORD
015D 20 PPSW PPSW VOLTAGE A/D COUNTS
01CE 21 NVRATIO RATIO OF ENGINE SPEED TO VEHICLE SPEED
0158 22 COOLDEGA COOLANT TEMPERATURE
0106 23 ADMAPND MANIFOLD ABSOLUTE PRESSURE (NOT DEFAULTED)
011A 24 ADTHROT THROTTLE POSITION, A/D COUNTS
015C 25 ADBAT BATTERY VOLTAGE, A/D COUNTS
0184 26 ADOILTMP A/D COUNTS FROM OIL TEMPERATURE SENSOR
0117 27 ADPTVAC PORT THROTTLE ACTIVATION VACUUM (FOR M61)
01C4 28 ADMAT MANIFOLD ABSOLUTE TEMPERATURE A/D COUNTS
011F 29 LADO2 A/D COUNTS FROM LEFT HAND O2 SENSOR
0120 30 RADO2 A/D COUNTS FROM RIGHT HAND O2 SENSOR
0103 31 LBLM LEFT BANK BLOCK LEARN MULTIPLIER
0104 32 RBLM RIGHT BANK BLOCK LEARN MULTIPLIER
0148 33 BLMCELL BLOCK LEARN MULTIPLIER CELL NUMBER
0138 34 LALDLCNT LEFT O2 SENSOR TRANSITION COUNTER
0137 35 RALDLCNT RIGHT O2 SENSOR TRANSITION COUNTER
00FD 36 LINT INTEGRATOR VALUE FOR LEFT O2 SENSOR
00FB 37 RINT INTEGRATOR VALUE FOR RIGHT O2 SENSOR
85AD 38 KSECINJ `MULT' SECONDARY INJECTOR ON FUEL SCALAR
01A0 39 PURGEDC CANISTER PURGE DUTY CYCLE
0035 40 ISSPMP IAC PRESENT MOTOR POSITION
00E3 41 ISESDD DESIRED IDLE SPEED
30C8 42 NEWRFPER TIME BETWEEN REFERENCE PULSES (MSB)
30C9 43 NEWRFPER+1 TIME BETWEEN REFERENCE PULSES (LSB)
30D0 44 SEREF UNLIMITED SPARK ADVANCE REL. TO REF. PULSES (MSB)
30D1 45 SEREF+1 UNLIMITED SPARK ADVANCE REL. TO REF. PULSES (LSB)
00F6 46 NTRPMX ENGINE SPEED
3013 47 TIME ENGINE RUNNING TIME IN SECONDS (MSB)
3014 48 TIME+1 ENGINE RUNNING TIME IN SECONDS (LSB)
00DA 49 NOCKRTD ESC KNOCK RETARD
30D7 50 OLDPA3 ECU PA3 COUNTER VALUE FROM LAST MINOR LOOP (MSB)
30D8 51 OLDPA3+1 NOT USED
0149 52 FILTMPH FILTERED MPH
0118 53 NTPSLD THROTTLE POSITION LOAD AXIS VARIABLE
00A1 54 CUREFIAP CURRENT INJECTOR 'A ' FUEL PULSE WIDTH
00A3 55 CUREFIBP CURRENT INJECTOR 'B ' FUEL PULSE WIDTH
3089 56 LBPINJC LEFT HAND LOW VOLTAGE CORRECTED BPW
308A 57 LBPINJC+1 LEFT HAND LOW VOLTAGE CORRECTED BPW
3099 58 RBPINJC RIGHT HAND LOW VOLTAGE CORRECTED BPW
309A 59 RBPINJC+1 RIGHT HAND LOW VOLTAGE CORRECTED BPW
307D 60 BPINJSD BASE BPW WITH D - TPS A.E. FACTOR APPLIED
307E 61 BPINJSD+1 BASE BPW WITH D - TPS A.E. FACTOR APPLIED
01A4 62 EGRDC EGR DUTY CYCLE
0060 63 FANMW FAN CONTROL MODE WORD

Hope that helps.

Jep

[-=Jeff=-]

how is this coming along?

[GOLDCYLON]

Jep any updates? ;)

[VetteVet]

Sorry for the delay in responding. I've been busy with work and haven't even been able to get on the forum recently.

Most of my recent free time has been spent doing other work on the Z that I had been putting off:

Header install
Fidanza install
PowerTorque clutch and pressure plate
Bill B short throw shifter(modified with a custom neutral sensor for future remote start system install)
4.10 gears
New U-joints
Poly suspension bushings

That being said, I have completed the wiring harness mods and am currently working on the crank and cam sensor solution.

I've now got a connection on the CNC machining for the LS1 reluctor mount. I am swapping out tuning on a heads/cam/headers/intake/TB/MAF C5 for the CNC work. I'm killing two birds with one stone, as this is also getting me experience on tuning the LS1 PCM.

I still need to do bench testing to determine if the pencil coil that I've got will work with this system. If so, I'll purchase 7 more and be ready to install the system on the car, load up a base tune, and start playing with the system on primaries only. If that all looks good, then I can start working on the secondary issues. Also I will need to wire up the PIM to see if I can get the LS1 PCM talking to the CCM on the 8192 baud bus.

Just a word of warning: As I have stated from the beginning, this will not be a plug and play solution and will likely come in at a higher cost than the MegaSquirt ECM solution that Ron has spearheaded. I have my reasons for going with the GM LS1B PCM. Primary among them is that the MS unit does not have the capability for certain hardware control pertaining to future mods that I have planned. After attending the presentation by the MS guys in BG, I am impressed with what they and Ron are doing. If anyone wants a plug and play alternative to our ECMs, you'd be better served going with their setup.

My intention is not to design a system to compete with them. My primary aim is to implement some new technologies on our engines that require the GM PCMs.

Jep

[rkreigh]

" Primary among them is that the MS unit does not have the capability for certain hardware control pertaining to future mods that I have planned."

do tell, please elaborate!!

this is an amazing project and I've been following it closely. just need to get you a different "day job" so you can wrap it up and put a bow on it.

outstanding work!

although I am thoroughly impressed with the "raptor squirt" (sorry, couldn't resist, new dinosaur porn star), the factory ECM is very capable

from a tuning perspective, do you like EFI Live or HP Tuners better and why? I'm looking to purchase and need some perspective on the LS ECM platforms.

again, thanks SOOOOO much for doing this and keep us posted on projected ETC and pricing. looking to purchase a better tuning solution for the LT5 to prep for a turbo build down the line.

TIA!:proud:

[-=Jeff=-]

I would really like to have some datalogging capability on my Android Tablet, Which is not created for the OBD1 stuff,

otherwise I am satisfied with my OEM ECM

[XfireZ51]

Jep,

Any chance you're looking at integrating the reluctor w the balancer? BTW, I have seen where
an ABS sensor is used to trigger the CnP.

[Hog]

I just picked up a 24x reluctor wheel so that I can go CNP, not COP like you are doing. I will be using 8 GM GEN 3 or GEN 4 coils for my conversion.
http://i1202.photobucket.com/albums/bb373/Paul_Schermerhorn/EFIConnection/008.jpg (http://s1202.photobucket.com/user/Paul_Schermerhorn/media/EFIConnection/008.jpg.html)

I will also be using the 0411 PCM tuning it with Tunercats OBD2.

Currently I am running a 4x CKP reluctor for CSFI, and 1 x CMP sensor located in the distributer.

When I go 0411, I will use this cap
http://i1202.photobucket.com/albums/bb373/Paul_Schermerhorn/EFIConnection/009.jpg (http://s1202.photobucket.com/user/Paul_Schermerhorn/media/EFIConnection/009.jpg.html)

on top of my distrubuter, instead of this stock crab style distributer
http://i1202.photobucket.com/albums/bb373/Paul_Schermerhorn/EFIConnection/032.jpg (http://s1202.photobucket.com/user/Paul_Schermerhorn/media/EFIConnection/032.jpg.html)
as I will need the distributer for a 1x CP signal and to drive the oil pump, but wont need the 8 high tension wires coming off of it.

If I wanted to go with a GEN 4 ECM I can use a 4x reluctor in the distributer body instead of 1x and use a 58x reluctor on the crank.

Once you get a 24x or 58x crank CKP sensor signal, the limits are endless.

[FU]

You have some serious talent there Jep :handshak:

[XfireZ51]

Unfortunate we don't have the access to an EFI Connection conversion like other SBC. Been around a while now. Part of the LT-5 issue w this dwell control is incoporated into the ICM not the ECM. So its pretty well hardwired for the current ignition coils. With some other module, even one made to handshake w the current ECM and use existing 9 slot crank reluctor and trigger, we still need a way to control dwell since the CnP have optimal dwell times different from stock coils. Unless someone wrote some code integrated w stock ECM to do that. :cry:

[Hog]

Unfortunate we don't have the access to an EFI Connection conversion like other SBC. Been around a while now. Part of the LT-5 issue w this dwell control is incoporated into the ICM not the ECM. So its pretty well hardwired for the current ignition coils. With some other module, even one made to handshake w the current ECM and use existing 9 slot crank reluctor and trigger, we still need a way to control dwell since the CnP have optimal dwell times different from stock coils. Unless someone wrote some code integrated w stock ECM to do that. :cry:
Actually that pictured 24x reluctor is only a few weeks old now. It uses a less expensive CKP sensor that the 96-98 Vortec trucks use. Notice its a single coded wheel, not a double wheel like the EFIConects are. Its different than the ones that were developed back in 2007. The 2007 versions are dual wheels that are coded exactly opposite, so 1 sensor must read 2 signals simutaneously. The 1999-2000 big block 454 used in the medium duty trucks was the 1st BBC to use CNP and DNW. That reluctor costs $20 from any GM dealership, get its accompanying sensor and it can be made to work. Or when getting a crank done, get a 24x signal cut instead of the 9x. There is always a crank hub mounted version, doable but optimal, maybe not.

Not sure if I understand your issue, once you go 0411 PCM, use it for your dwell control, the tables are there, gut the LT5 ignition entirely. Then set them up for your COP coils. But I must be missing something.

Good work on your project. I have blazed some EFI trails, it can be challenging, but rewarding in the end.

[XfireZ51]

Actually that pictured 24x reluctor is only a few weeks old now. It uses a less expensive CKP sensor that the 96-98 Vortec trucks use. Notice its a single coded wheel, not a double wheel like the EFIConects are. Its different than the ones that were developed back in 2007. The 2007 versions are dual wheels that are coded exactly opposite, so 1 sensor must read 2 signals simutaneously. The 1999-2000 big block 454 used in the medium duty trucks was the 1st BBC to use CNP and DNW. That reluctor costs $20 from any GM dealership, get its accompanying sensor and it can be made to work. Or when getting a crank done, get a 24x signal cut instead of the 9x. There is always a crank hub mounted version, doable but optimal, maybe not.

Not sure if I understand your issue, once you go 0411 PCM, use it for your dwell control, the tables are there, gut the LT5 ignition entirely. Then set them up for your COP coils. But I must be missing something.

Good work on your project. I have blazed some EFI trails, it can be challenging, but rewarding in the end.


No you're absolutely correct. W the 411 you would use those dwell tables. I was musing about our current 9 slot reluctor on the crank, ie just use the current crank signal, ditch the ICM and do some custom code for the stock LT-5 ECM to handle dwell. Still would need something to do the firing sequence which is also a function of the current ICM.

[XfireZ51]

BTW, have you looked cutting slots into balancer itself? Would ATI do something like that?

Also, I understand some are using the ABS Sensor as a trigger.

[VetteVet]

" Primary among them is that the MS unit does not have the capability for certain hardware control pertaining to future mods that I have planned."

do tell, please elaborate!!



Ron,

I'm looking at several mods. In order of priority, they are:

Coil on plug with elimination of the ICM (supposedly, the MS unit can handle this).

Electronic Throttle Control. The LS stuff they have now has more cross-sectional area than one of our throttle bodies even after being punched out (don't think the MS unit can handle this). This would also allow for a full implementation of the torque management that is available with these PCMs.

Mods to valve train to implement variable cam timing (don't think the MS unit can handle this). This would require moving up to a Gen IV PCM.

Dreaming about a split plenum twin electronic throttle body setup w/ one TB feeding the primary ports and one feeding the secondary ports. This would allow the benefits of the primary/secondary setup without the flow restriction of the butterflies in the secondary ports and the problematic vacuum actuated system. Also being able to control the proportion of primary/secondary airflow throughout the load range would allow for tuning of swirl throughout the range for maximum area under the torque curve.

I've got other ideas, but these are my primary goals.

Jep

[VetteVet]

No you're absolutely correct. W the 411 you would use those dwell tables. I was musing about our current 9 slot reluctor on the crank, ie just use the current crank signal, ditch the ICM and do some custom code for the stock LT-5 ECM to handle dwell. Still would need something to do the firing sequence which is also a function of the current ICM.

Dom,

I agree that a code rewrite would be able to handle the dwell aspect. I also agree that an external firing sequencer would be required, as the stock ECM does not have enough free digital outputs to handle the task.

Jep

[VetteVet]

Update:

I didn't end up getting the reluctor mount fabricated for me. I did it myself. I still have to get the sensor bracket done.

Pics:

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_173859_423_zps20f474f4.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_173859_423_zps20f474f4.jpg.html)

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_173952_537_zps2d9a8d37.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_173952_537_zps2d9a8d37.jpg.html)

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_174053_274_zpsf6e0ef2b.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_174053_274_zpsf6e0ef2b.jpg.html)

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_175211_319_zpsf6b6859c.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_175211_319_zpsf6b6859c.jpg.html)

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_180558_299_zps69237060.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_180558_299_zps69237060.jpg.html)

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_181033_355_zps2c4e2279.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_181033_355_zps2c4e2279.jpg.html)



Jep

[VetteVet]

http://i827.photobucket.com/albums/zz195/vettevet/IMG_20131109_181156_101_zps7cf06227.jpg (http://s827.photobucket.com/user/vettevet/media/IMG_20131109_181156_101_zps7cf06227.jpg.html)

Jep

[XfireZ51]

Very nice Jep. 58 tooth or 24? And there's room in front of balancer in engine bay?

[VetteVet]

Dom,

24x (for now). Once I get the sensor mount done, I can get the reluctor wheel positioned and pinned. Then I'll balance the assembly (as you can see in the photos, the reluctor wheel is very unbalanced).

Jep

[XfireZ51]

Dom,

24x (for now). Once I get the sensor mount done, I can get the reluctor wheel positioned and pinned. Then I'll balance the assembly (as you can see in the photos, the reluctor wheel is very unbalanced).

Jep

Yeah that was a big reason they put the reluctor in the middle of the crank. I suppose having only 9 notches would make it more susceptible to error as well.
The middle is the most stable spot given the rpm they were looking for.

[-=Jeff=-]

Whatever happened to this??

and to Jep for that matter!!

[VetteVet]

Jeff,
Thanks for your concern. I'm alive and well. I've spent the past 13 months working on the restoration and outfitting of a 40' Skater catamaran. It was the APBA Supercat world champion in 2000. My buddy and I are not going to race it, we're just looking to do poker runs with it. We should have enough power to run 155-160 MPH.

Until it's up and running, I won't have any time to devote to the PCM project. I haven't lost the ZR-1 fire, I just can't rest until this big beast is done. The good news is that we've given up the offshore and Formula One tunnel boat racing, so once the Skater is done, I'll have more time than in the past to devote to the project.

Jep

[-=Jeff=-]

GREAT to hear from you Jep..

What is the current status of the LT5 PCM project? where did you leave off at?

[C4Ray]

Luckily, I've got a great GF who doesn't mind me working on the dining room table. [-X

How about your GF is lucky to have a hard working faithful man that luckily for her he enjoys staying at home and being productive fixing things than going out with his buddies and drinking, carousing and spending money? With due respect I get really tired of seeing all this kissing up to the wife, gf, etc. American women have good - maybe too good in my opinion and American men are great men when compared to the rest of the world.

Your GF is LUCKY to have you! :handshak:

Alright rant over. Thank you :dancing

[cvette98pacecar]

Jeff,
Thanks for your concern. I'm alive and well. I've spent the past 13 months working on the restoration and outfitting of a 40' Skater catamaran. It was the APBA Supercat world champion in 2000. My buddy and I are not going to race it, we're just looking to do poker runs with it. We should have enough power to run 155-160 MPH.

Until it's up and running, I won't have any time to devote to the PCM project. I haven't lost the ZR-1 fire, I just can't rest until this big beast is done. The good news is that we've given up the offshore and Formula One tunnel boat racing, so once the Skater is done, I'll have more time than in the past to devote to the project.

Jep

Jep, Great to hear from you. Hope all is well.

[-=Jeff=-]

Okay.. been over a year.. HEY JEP!!! How is the LT5 ECM project coming along?