Hello all.

This is Wallace from Little Rock. I don't really have an F-Body per se, what i have is a hybrid:

http://photos.yahoo.com/wh1513@swbell.net

Click on "The Truck"

Anyway, is is a 1992 GMC stepside with a 1993 F-Body OBD1 ECU running a fully built and prepped LT1 (1996 block)

Here are some specs:

Vortech "T-Trim"
8.4:1 compression with custom JE Pistons, coated
AFR Heads
MSD Pro Billet Opti
MSD 6 BTM Ignition and Crane Coil
Manley Pro Flow valves
Lunati Crank
Pro Mod Rods
TH400 tranny "Switch Pitch" and Gear Vendors Ovedrive
3:42 rear end with Coil-overs and Ladder bar setup, 4-Link

Custom Interior, too.

Anyway, I just had the motor completely rebuilt. Previous tune was with a 4" pulley and 36lb injectors at 8.5:1. I have since added 42lb injectors and I am in need of some tuning help/advice. I am glad to have found this board as it looks like a wealth of information is available.

Thanks!

Wallace Hattenhauer

 

Tell me more about your switch-pitch tranny. I had one of those once but never used it in anything.

I wasn't aware they made one with a Chevrolet bellhousing pattern either, do you use an adaptor plate?

Cool truck BTW.

 

I got the Chevy case from a Race Shop in NY, but I forget the name. They are hard to find! The original parts are out of a 1965-66 Olds 98, and I took out the internals I needed, added HD Sprag, Race Clutches, Shift Kit, did all the performance mods such as drilling and blocking specific paths in the valve body, etc.

I forgot to mention I also changed the pulley to a 3" one, so now I graduate to more boost...hence the 42lb injectors that I am pretty sure I am about to swap out ot 60's...

 

if u are planning on making over 500 rwhp u will need bigger injectors

 

wallacehat I think you have talked to my buddy Tapout911 before here in Paragould AR. If not then their is another 92 GMC stepside with a Blower and AFR heads, lol.
I have a Similiar setup to yours that should be going together over the winter.
If you want to step up the injectors go with the 60lb mototrons, thats what I have and a lot of 700RWHP+ guys run those with great success.
Are those AFR Heads 210's out of the box???
I can't remember the max Blower speed on a T-Trim but with my D1SC I have a 3.2 Blower pulley and I plan to get the 7.625 crank pulley. Blower RPM will be 60571 out of the availabe 62000 at 6200RPM.
I would like to talk setups with ya sometime, and I know a Few Tricks to making that blower run better Pm me if yoo want. What power level are you at right now??? Later man and welcome to the Forum.

 

Hey Wallace, welcome to the forums. If I can help in anyway, just call me or shoot me a pm. I still dont know much about the eprom side of it, but can answer any tunercats questions you have.

Paul