C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

C4 85 stock tune upgrade

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Old Apr 23, 2014 | 09:32 AM
  #21  
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tunedport85inject
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tested the car on a straight lane,wot is in the 10.7-10.8 range sometimes it goes down to 10.6.i've tried to datalog but having issue with the new release of Tunerpro RT 5.00.83.69 since it now uses new .ADX extension vs the old .ads for datastream,resulting in a no connection.I'llTry with an old laptop with tunerpro rt 4.(if you look at Tunerpro site,in the dowload section you'll find that not all .ads file are releasedin .ADX format for all platform

there is a way to open this old .ads an convert it into .ADX by IMPORT DEFINITION>FROM ADS,
tunerpro rt open an old ads and then save it as .ADX,but again not connected button stays on,btw this is another issue...
[IMG][/IMG]

Last edited by tunedport85inject; Apr 23, 2014 at 09:34 AM.
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Old Apr 23, 2014 | 09:44 AM
  #22  
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I have only ever used WinALDL until now, but I plan to test TunerPro shortly.

In preparation I got an A028.ads file from Robert Saar that should be correct for the '85 1226870 datastream. I cand send it to you if you PM me.
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Old Apr 23, 2014 | 09:44 AM
  #23  
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here a video WOT launch and wideband readings
https://www.youtube.com/watch?v=J5tY...ature=youtu.be
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Old Apr 23, 2014 | 09:57 AM
  #24  
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thanks Jsiddal,but now Tunerpro RT 5 is running new version .ADX file not the old .ads,definition file for 85' y body(corvette) l98 is A20.ads as you can see from tunerpro site
if i'm right
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Old Apr 23, 2014 | 10:51 AM
  #25  
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Hmmm... but if you look at the "Most GM OBDI datastream definitions can be found here." link:

http://www.tunerpro.net/gmOBDI.htm

You will see the correct definition is listed as A028. I diffed the two and there are a fair number of differences. If you look at the strEngine line in the A20 file you will see it does not list L98s at all.

Since I have not tried either I can't say which is correct. Some trial and error may be required.
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Old Apr 23, 2014 | 01:39 PM
  #26  
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i've used a bunch of time A20 .ads as datastream definition and it work perfect using $1f.xdf and HLH 85 vette tpi.bin.I've used with no problem on previous version 4 of tunerprort.
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Old Apr 24, 2014 | 07:35 AM
  #27  
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i can confirm that the A20 .ads is fine for an 85'y body 5700 tpi l98 engine.Today had some datalog ,the same scenario my BLMs are stuked down in the low 110-112 even 108,AFR readings are in the 14.3-14.7 range,my ECM is working hard try to keep parameters but i think something mechanical is out of balance,i think i had some air leak .This engine need a intake job,my stumbling idling confirms this

Last edited by tunedport85inject; Apr 24, 2014 at 07:38 AM.
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