Custom tuning

[Mark Romans]

Tom I stopped and talked to Steve this last Monday and he showed me what he
was doing on a 98 Vette.  He had the spark table all printed out and was
running the car on the dyno,  running it a WOT and letting the dyno
accelerate in 200 rpm increments,  snap shooting it with his tech2 and going
in and adding spark where appropriate and taking spark out where needed and
then re-running it to check the results.  It was interesting that the 98
Vette spark map goes all the way to 8000 rpm's and measures the air flow in
grams/sec/cyl.  He said that one took a while to figure out!  He said it
runs too rich stock and he had already gained 22 hp and 20 ft lbs from stock
and hadn't messed with the air/fuel ratio yet.  He does know what he is
doing.
He sells some really awesome software for the earlier ecms too.
Mark
-----Original Message-----
From: TWong29770 at aol.com <TWong29770 at aol.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Saturday, July 18, 1998 6:01 PM
Subject: Re: Custom tuning


>Has anyone on the list had any experience with custom tuning of a late
model
>OBD2 GM VCM/PCM from TTS or more commonly The Turbo Shop in Los Angeles CA?
I
>talked to the owner and he seems pretty knowledgable, and susposidly he has
a
>chassis dyno on sight for his tuning calibrations?
>
>I just wanted to get some feedback before sending a PCM to TTS for
>reprogramming.   As I have not been able to find anyone else that can do
any
>mods on the 98/99 GM VCM's, except for TTS.  My Diacom plus can't even
access
>the data stream and the only way I can diagnois problems is with a barrowed
>Tech2 from a friends dealership.
>
>Tom Wong
>