Ok first of here is what i have done to the car it is a 1991 Trans am that i took out the tbi 305 and put in a 1969 350 small block i got it bored .060 over i have a 510 lift cam at 234 at 50thos i put on a holly intake and put on a 600 cfm edlbrook carb also have a high output hei coil and headmen header s with 3" flowmasters . but here is what i would like to know when i take off it is kinda slow off the line but has very good power up in rpms i would like to know what kind of gearing i should use for the rearend. thanks eric


1991 Pontiac Trans Am - Eric's Pontiac "The Night Rida"

 

OK first you need to get a stall converter like 3500 rpms and put that in and then you should get like a good posi rear like 3.73 or 4.11 gears man that thing will rip and of course some good tires because with all that power you're gonna spin them like crazy and maybe a helmet too in case you wreck

I hate run-on sentences, don't you!

 

Another reason might be that the power off the line is kinda slow, depends on what kind of intake it is. Single or dual plane. Usually the dual planes generate all the power from around 2000 and up rpms.

Like Lo-tec said, 3.73s willl be fine, and if you dont have a stall converter, well it'll definately help, but im suprised you're not having issues with your power brakes with all the vacumn the cam is sucking up.

 

ok i was told to get a 2800 stall would that be good but yea i think i am goin with a 4.11 is that all good.

 

what kind of cam do you have with .510 lift and 234 @.050 I'm just kind of curious which brand it is. I have a .507, .510 with 240, 246 @.050. A 3000 stall converter works just fine for me. I use 3.73 gears in the rear and at 60 mph my rpms are about 2500 with 26 inch tires.

 

The cam is made by comp cams and the set up u said sounds good. One question is the way u have it good for street.

 

2800-3200 stall would be about right, but I wouldn't use a 4.11 gear. Thats just too much IMO. You'll just run out of gear too fast... 3.73 would be a much better idea.

 

What would be a good site to buy the gear form anyone know of one..

 

Summit racing, Jegs, or Randy's Ring and Pinion are a few to look at.

 

Summit and Jeg's are right there by you in Ohio. So it would also get there pretty fast.

 

Or you could even just visit them, and drive home with it.

 

ok first off how is the 3:73 on the freeway what are the rpms like at about 75 80 with OD

Also does anyone have a 3:73 gear they would like to sell!!!!



1991 Pontiac Trans Am - Eric's Pontiac "The Night Rida"

 

they arent too bad on the freeway at all and i dont even have OD

 

They are not bad at all on the highway... should be around 3000 w/o overdrive... overdrive will be a good bit lower.