my 86 IROC came with a gear set of 3.23 posi.. in my quest to make it go faster i was wondering if it would be better to swap them out for 3.73's?? and will 3.73's bolt into place of the stock ring and pinion?

Also- what all might i need for the swap, what is a good price on a set?

All the info on my car is listed on my side bar and my sig.. Thanks guys!!

 

The 3.73s would give you slightly better off the line acceleration with the loss of some top end unless you make mods to put the engine RPM range higher to compensate ... truthfully it wont make a big difference and you can use other mods to gain more speed and keep your cruise RPM down ..

 

Well- i wouldnt mind losing some top end- it has pleanty... I've been told that my long Y-pipe has moved the engine's powerband into higher RPM's..it really picks up around 27-- RPM's all the way through the rpm range..- i need to bring the powerband down a little..

What mods can i use to gain more off the line torque and good 60ft's?
This engine was originaly connected to a TH350 and a 3.73 rear end, it was then carburated and felt like it had lots of power.. since i've put it into my camaro it feels like i've lost some.. Whats goin on there?
Thanks!


Here is a link w/ pics of my Y pipe..
https://www.thirdgen.org/forums/show...42#post2799042

 

Of course you have; it has TPI on it now. You'll just have to get used to it.

3.73 gears with the Vortec setup and some tuning should be OK. They'll give a helluvalot more than a "slightly" better launch; like, it'll feel like a whole other car. You could also try a converter; something in the 2400 RPM neighborhood would be a big improvement over the stock 1400-1600 RPM.

 

See- my buddy has a 78 camaro w/ a stock LT1 in it.. the only things that are done to it are underdrive crank pulley, reprogramed computer and an air filter- and then he put 4.10's in it.. before the 4.10's it slept a bit on the line, now he has trouble keepin the car on the road when it takes off..

I have ported TPI stuff, vortec heads, and a bigger engine.. and an ARAP bin set up for the 24# lt1 injectors... and a stock 10 bolt posi 3.23 gear rear
So is my ****ty gearing a big part of my problem?

And i am looking into tryin to get a 2400 stall.. right now it stalls out at about 1800 w/ stock 305 converter...

Whats a good price to look at for gears? ( my stock rear is posi btw) and what should i look for to make sure they will fit?
THanks!!