New ECU project
 

http://www.liferacing.com/?page_id=120

Going all the way to a standalone motorsports controller. Is it necessary, of course not. But I want to eliminate the ignition module and run 8 x COPs.

A little constrained on outputs, unless I add the expander. So I might run it as wasted spark initially.

Should be fun!

Re: New ECU project
 

looks like a nice system. what made you go this route instead of the raptor megasquirt?

I agree that an aftermarket ECM can really help tuning one of these beasts especially with rowdy cams

good luck todd and keep us posted

how much is that rascal?? are you keeping the stock ecm to drive the gauges?

Re: New ECU project
 

will it 'play nice' and talk with the CCM?

Re: New ECU project
 

Just wanted something different, with a bit more functionality and flexibility. The Raptor MS seems like a pretty good option for some. In my case, I wanted to eliminate the ignition module, and control 16 injectors sequentially without the added drivers, among other things. It will use a combination of alpha-n (TPS), and Manifold pressure (MAP) as the load variable for fueling and spark. The options are just endless on this thing.


Will be close to $5000 when done, not including my own time of course.

It will drive both the Tach and Speedometer, so won't need the stock ECU at all.

I plan to get it setup on a stock engine on a test stand first. Then use it on the engine dyno to map the 427.

Re: New ECU project
 

http://i1036.photobucket.com/albums/...eRacingF88.jpg


...... <waiting> should arrive this week. Full spec F88 motorsport ECU. I plan to initially configure as waste spark, but eliminate the ignition control module altogether. Fully capable of coil on plug down the road if I can find some decent coils that fit.

brand new wiring harness required... unfortunately.

too many projects, so little time.

Re: New ECU project
 

BTW, as far as I can tell, the stock ECU based on the Motorola 68HC11 chip runs at 2Mhz. The Life Racing unit runs at either 40 or 56 Mhz, I'm not totally sure. But it's fast!

2Mhz was probably state of the art in 1987 automotive controllers.

Re: New ECU project
 

well, damn. they sent the wrong ECU. I was hoping to have something to display next week. The unit they sent only does 8 injectors :(

Re: New ECU project
 

Todd,

Is the base software configurable or will you be writing specific code?

Re: New ECU project
 

It's here....

http://i1036.photobucket.com/albums/...e/IMG_0918.jpg

Not much time to work with it until the fall probably, but at least I can start creating the calibration.

Re: New ECU project
 

nothing but the best for Todd

Re: New ECU project
 

Keep us posted this maybe a future alternative in keeping the beast alive. GC

Re: New ECU project
 

Almost ready to fire up the new ECU. Calibration interface really wasn't that complex. I think I got a decent base map to start. LIfe Racing F88. 16 injectors, wasted spark stock coils, for now. COP capable.

Re: New ECU project
 

56mhz Freescale processor from what I understand, FPGA for engine position/timing calculations. This is the bomb.com.

Re: New ECU project
 

Todd,

So u won’t be using the crank sensor for firing, if I understand correctly? Is this tuning on engine dyno or in the car and on the street?

Re: New ECU project
 

No it definitely uses the crank and cam sensor. What I meant was that Life uses separate processor to monitor and manage the time critical signals rather than tie up the main processor. Not a big deal for the LT5 running a mere 7k rpm and only having 9 crank teeth per rev. With a more dense trigger wheel and 5-figure revs it probably matters [emoji1303]


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Re: New ECU project
 

I would imagine the FPGA does all the time critical work.. They are extremely fast and very time accurate.

I think many aftermarket ECU for our cars would benefit us..

for most the MS3-pro if they ever get around to releasing it.. but I heard the Holley HP is another decent ECU too and I now it runs a LT5

Re: New ECU project
 

Really? That's news. didn't know that one had been used on an LT5.

Re: New ECU project
 

Yes.. a 58 Corvette with the LT5 and Holley HP system. I have an email from the builder on what he did..


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Re: New ECU project
 

Finally found coils that fit. Getting back to this project now that there is a lull in customer work. Hope to run on the new ECU in the spring.

Re: New ECU project
 

Hey Todd, would you mind sharing the details on the Coil you found? what application is it from?

EDIT: I ask because I am looking into ECM/IM alternatives to see what might have a chance to work

Re: New ECU project
 

Bosch Motorsport P50M. Expensive little buggers. They have no internal ignitors so have to be driven either direct (if the ecu is capable) or with some external power stage. In my case the ecu can drive them direct.


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Re: New ECU project
 

And forgot to mention, you have to buy the boot separately.




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Re: New ECU project
 

So in theory these would not work on an ls1 car right? I am using D514a coils in my experiment

Re: New ECU project
 

That’s right, not with a stock gm ecu



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Re: New ECU project
 

Won’t work for me then

Re: New ECU project
 

Getting closer.....Attachment 9755Attachment 9756




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Re: New ECU project
 

That looks impressive.

Re: New ECU project
 

custom plug wires finished and routed. you can also see parts of the motorsports-spec wire harness.

Attachment 9948

Attachment 9949

And I got the ECU powered up and running. Cam and crank patterns are detected and in sync. Whew!


Attachment 9950

I'll be cranking it up within a few days.

Re: New ECU project
 

Nice work Todd, I can`t wait to see this engine running on this top performance ECU.

Re: New ECU project
 

I am pleased to report.... IT RUNS.

After initially having the cam sync 360 degrees out of phase, when fixed, it freakin' starts right up. I'm thrilled.

New aftermarket ECU
custom wiring harness
sequential ignition coils
from scratch calibration

Sweet, sweet LT5 music barking out of the exhaust. I'll try to make a blog video tomorrow.

The end of the beginning... now I have to optimize it.

Re: New ECU project
 

Bravo Todd for continuing to push the envelope. It just continuesnto demonstrate how adaptable the LT-5(real one) is.
Waiting for the results.

Re: New ECU project
 

New blog post.
https://pepmeierenginedevelopment.bl...YdpZGXtQN0pSrk

Facebook page

https://www.facebook.com/PepmeierEngines

Re: New ECU project
 

Couple new videos of the engine running. Today, ran on pure E85 for the first time. Garage smells waaaay better!

https://www.facebook.com/10001144368...00011443683384

Re: New ECU project
 

Nice work and tremendous engineering!


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Re: New ECU project
 

Hi Todd
Why you go for the top racing Life Racing ECM and not to the good Holley dominator ECM ?
Just want to know for curiosity.
Thanks