ALDL Data Logging - ZR-1 Net Registry Forums

KPW · 08-26-2016

A little while back I picked up one of the Bluetooth/USB ALDL interfaces from 1320 electronics. I had some issues communicating with my ZR-1 for a while, but a few emails with John Wales, the man behind 1320, I'm up and running.

I logged my commute this morning, and picked out a few portions of it to look a little closer at. Could someone take a look at these and see if there is anything that seems out of whack? I have a 4th gear 100% throttle run from ~40-60mph and a Hot Idle.

I'm not necessarily troubleshooting anything with the car specifically, just interested to know if what I'm looking at are "normal" readings.

Thanks!

-=Jeff=- · 08-26-2016

I usually look at part throttle data to see what might be 'off'

WOT turns off learn mode.. you want to be in Closed loop and Learn control ON

KPW · 08-26-2016

Thanks, Jeff.

I have a short run-up with a max TP of 30%. Learn Control is Enabled, and the vehicle is in Closed Loop. Is this appropriate, or would something more extended be better?

-=Jeff=- · 08-26-2016

Okay.. Part throttle for that bit looks to be Lean.. Perfect BLM is 128.. I target 128 +/-2 across RPM/MAP.. some areas are adding fuel..

Stock PROM? Any Mods to car?

KPW · 08-26-2016

As far as I know only mods are Haibeck chip and Flowmaster catback.

Hib Halverson · 08-27-2016

I'd say that engine is lean. In closed loop it's adding fuel.

If it were me, I'd put a wideband in the exhaust and take some data at WOT, but I'm going to bet the engine is a tad lean at WOT.

Has the fuel filter been changed recently?

Also, looking at the part throttle sheet, you're getting some KR at only 30% TPS, which is a little surprising. On the full throttle sheet you're getting a little KR at WOT, which, if you're using pump gas and considering the ECT, MAT and that the engine might be lean at WOT, doesn't surprise me.

The only caveat here, and it's a big one, is that your data samples are really short. When I do data logging for part throttle calibration purposes, I take data for 15 even 30 min. Obviously, to do that, I have to use datalogging SW which saves to my laptops HD.

Let's see a third gear run to 5000 rpm.

KPW · 08-27-2016

Thanks for your responses. I'm learning a lot here.

Quote:

Originally Posted by Hib Halverson

Has the fuel filter been changed recently?

It has not.

Quote:

Originally Posted by Hib Halverson

Let's see a third gear run to 5000 rpm.

Here's three runs in 3G at POT. I've noticed that for these the BLM settles to 130, which seems more in line with the 128 +/- 2 goal. Interested to know what you guys think.

Hib Halverson · 08-29-2016

What do you mean by "POT"?

Change the fuel filter then make a run at wide open throttle (WOT) between 2000 and 6000 rpm in third gear. Then post the data.

Even better would be to put a wideband in the car. Do you have access to one?

GOLDCYLON · 08-29-2016

Partially Open Throttle (POT) As opposed to WOT

XfireZ51 · 08-29-2016

There's really not enough data to reach any conclusions based on what is in the .xls. It looks like there "may" be a lean condition at the rpm/map areas recorded. When I datalog, I am usually collecting 25-35k frames for each log.
It also depends on the terrain u are driving on, which should vary in order to collect data in as many of the VE cells as possible.
There's no silver bullet in tuning. It takes gas and time to get it right. Most of the time, when u think you have it nailed, something changes, like ambient temps. VE and SA tables are just scratching the surface, the absolute basics.

08-26-2016	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,132	Re: ALDL Data Logging I usually look at part throttle data to see what might be 'off' WOT turns off learn mode.. you want to be in Closed loop and Learn control ON __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

08-26-2016	#4
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,132	Re: ALDL Data Logging Okay.. Part throttle for that bit looks to be Lean.. Perfect BLM is 128.. I target 128 +/-2 across RPM/MAP.. some areas are adding fuel.. Stock PROM? Any Mods to car? __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

08-26-2016	#5
KPW Join Date: Jul 2015 Location: Ypsilanti, MI Posts: 114	Re: ALDL Data Logging As far as I know only mods are Haibeck chip and Flowmaster catback. __________________ 1991 ZR-1 #1438 Black/Black & Red

08-27-2016	#6
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 899	Re: ALDL Data Logging I'd say that engine is lean. In closed loop it's adding fuel. If it were me, I'd put a wideband in the exhaust and take some data at WOT, but I'm going to bet the engine is a tad lean at WOT. Has the fuel filter been changed recently? Also, looking at the part throttle sheet, you're getting some KR at only 30% TPS, which is a little surprising. On the full throttle sheet you're getting a little KR at WOT, which, if you're using pump gas and considering the ECT, MAT and that the engine might be lean at WOT, doesn't surprise me. The only caveat here, and it's a big one, is that your data samples are really short. When I do data logging for part throttle calibration purposes, I take data for 15 even 30 min. Obviously, to do that, I have to use datalogging SW which saves to my laptops HD. Let's see a third gear run to 5000 rpm. __________________ Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878

08-29-2016	#8
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 899	Re: ALDL Data Logging What do you mean by "POT"? Change the fuel filter then make a run at wide open throttle (WOT) between 2000 and 6000 rpm in third gear. Then post the data. Even better would be to put a wideband in the car. Do you have access to one? __________________ Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878

08-29-2016	#9
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: ALDL Data Logging Partially Open Throttle (POT) As opposed to WOT __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

08-29-2016	#10
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,664	Re: ALDL Data Logging There's really not enough data to reach any conclusions based on what is in the .xls. It looks like there "may" be a lean condition at the rpm/map areas recorded. When I datalog, I am usually collecting 25-35k frames for each log. It also depends on the terrain u are driving on, which should vary in order to collect data in as many of the VE cells as possible. There's no silver bullet in tuning. It takes gas and time to get it right. Most of the time, when u think you have it nailed, something changes, like ambient temps. VE and SA tables are just scratching the surface, the absolute basics. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX