I have an 82 trans am that weighs 3100lbs.
It has a 2.93 posi , some traction aids(see sig) , 350 tranny with shift kit, and a 305 bored 0.030 over (310ci),9.5:1 compression, the engine is:

Crossfire Injected with;
-stock ecm and injectors
-slightly polished throttle tunnels(removed ridge)
-dual open element
- cowl induction
-heavily ported x-fire manifold(cleaned up rough edges, grinded ports and cut off sharp bends for increased air velocity) , gasket matched intake ports and cylinder head ports
- polished exhaust ports and bowl
- polished combustion chambers
-ported intake ports on cylinder heads and removed casting flash
-comp cams 252-AH12 computer friendly hydraulic lifter cam
206*/212* duration at 0.050 and .425''/.440'' lift
and 112* lobe separation
-blue racer double roller timing chain
-heddman 1 5/8 shorty headers
-custom 3'' single exhaust
-dynomax super turbo muffler
-carter 15psi fuel pump

from this setup, what would a safe prediction of my ET be?

 

With the stock tune I would say low 15's. With a custom prom 14's are possible. But perdicting ET's is like buttholes, everyone has one and it stinks. You just gonna have to run it.

 

true, true

 

Well, seems like a nice little build-up you've got there...only one thing I disagree with. Get rid of the super-turbo muffler and get the ultra flo.

I say with what you have now...mid to high 14's.
Chip tuning, and ultra flo muffler....high 13's isn't far fetched.

 

You might want to rethink your fuel pump, you could use one capable of higher pressure to better tune with. Also maybe some bigger injectors could be in your future. If you have access to a WB o2 meter it would sure help tuning alot.

One other thing that might make tuning a little simpler would be to switch to a newer ecm like a 746 or 747.

Steve

 

hey STEVE8586 IRoc...
about switching to a newer ecm, like lets say an 87 tbi...
how hard is it, would I be albe to use existing wiring???

 

To be honest, I'm not sure what all would be envolved. Maybe RBob or Grumpy will see this post and help you out.

Steve

 

You should be running mid to high 14's if it is tuned decently. By tuned I mean FP and Timing, not a chip. Chip tuning would help further, but you should do what I just said w/o it. More than chip tuning getting a better gear and a 5 speed would help a TON. If you had that, I'd say you should be able to kiss 13's with great driving.

As for changing the ECM you need to make your own adapter harness that plugs into your car's harness and in to the 7747 ECM. Not hard, but somewhat time consuming. If you'll look at my sig, you'll see what is POSSIBLE with teh stock ECM and chip. Not Ideal I'm sure, but you can make it work.

-Tom