i have heard these motors suck as far as performance goes. what tune would be the best thx

 

www.gowheatley.com He should be able to get you where you want to go.

 

what made you pick wheatley? over the other brands of custom tuners? ex fklaco, efilive? and what is a hp tuner? thx

 

i have black bear and i am more then happy with them . i picked black bear because i plan on a dyno tune later on and he is a few hours drive away

 

the L31 motor. is that the 5.7 vortec that u have? was the black bear a noticeable difference? so u just got a tune without a dyno run? sry man im just new to the tune world. i have the superchip and def wanna change. hp tuner whats that

 

I have heard u cant tune them as much as the new ls motors. I would do headers and a vette servo see how u like that then get a tune. buddy of mine had a old l31 put headers on it woke it right up

 

i went from a superchips to my 91blackbear tune . and yes there was a boost in power vs the superchips . i did not get a dyno tune i just told them my mods and they tuned it from there . i have heard the pcm4less is very good at tuneing these L31 with 87 octane if your not going to dyno tune in the future . but i plan on a cam swap later on so i will be doing a dyno tune later ..:

 

The 1996-97 PCm's(blackbox with 4 connectors) in these GMT400 trucks isnt supported via HPTuners/EFILive, Tunercats OBD2, Tunercats Realtime OBDS, Jets DST and Westers GMT can tune these PCM's. The 1998-2000 blackbox PCM's can be tuned but it costs extra money with EFIlive.

Any Pro tuner that has the ability to make his/her own vehicle definition files (working in Hex) have always been able to tune these truck. Wester's and Fastchip have been tuning these for years, even before the support of HP/Efilive. HP/EfiLive has simplified tuning quite a bit, and have born a whole new breed of tuners that don't have to crack PCM's at all.

Even with tuning the 96-97 and 98-00 blackbox PCM's will not rev over 5900 rpm, even if the rev limiter is set to 12,500rpm. To rev higher a conversion to the 896 or 411 (512kB) PCM is needed with the installation of a 2001-2002 L31 Vortec 350 Express van calibration.

peace
Hog

 

great info! thx man! so should i just find a local tuner so i can get a dyno tune? or should i send it to wheatley or someone else?

 

HOG always has great info.. WHEATLEY does a fantastic job tuning.. I am tuned by Justin at blackbear. EFIlive and HPtuners is just software they use to adjust the pcm.. Nelson-Blalckbear-Wheatley are the top notch tuners.. I do not think you will be disatisfied with any of them...