Turbo 400
 

Who makes the best 2.75 first gear set for a turbo 400? How much can a car pickup in et?

Re: Turbo 400
 

I was looking at the samething but my question is how much power can they handle?

Re: Turbo 400
 

How much you'd pick up depends upon a lot of factors, I'd have to know a lot about your combination and how well it performs now. ATI makes a good set, so does Kilgore.

Re: Turbo 400
 

The ATI 2.75 aluminum carrier gearset I have in my stocker has been in too many cars to count. .....Before I put it in the AMX it was in a 3400# S/ST car with a brake! ....It must have well over 1000 passes on it. ......Not as trick as Kilgores stuff tho. .....Tom

Re: Turbo 400
 

Could slow you down too.....:eek:

I went the other way with the Kilgore 2.10/1.40 set and it is quicker than a 'glide, or the stock 2.48/1.48 gearset. It is not any of the trick light stuff.

Sometimes reducing the speed at which you accelerate rotating mass can take less parasitic loss and improve your ET. Usually that would be when you have plenty of HP and torque multiplication from your converter.

Re: Turbo 400
 

I have a 275 gear set, $250.00 plus shipping.

Brian

oakes2074@hotmail.com

Re: Turbo 400
 

I believe that. I went to a 4.10 gear from a 3.90 and slowed down. Even the 60' was about .02 slower. going back to a 3.90 when the wallet gets a little fatter, LOL.

Re: Turbo 400
 

Bobby, Was the testing Back to Back same track and day? If the track will hold the 4.10 it should be quicker in 60 and et unless running out of RPM and running flat. The fact you quote a slower 60 worries me about the test ..... Tried a 2.75 versus a 2.48 trans back to back runs picked up et with MY way of driving. Picked up more by leaning on the convertor also after that... Shifting later to 2nd also helped to a point. I needed to retest the 2.48 with all the later facts too to be sure I couldnt make it better with convertor torque.

Re: Turbo 400
 

No, but the weather conditions were close (yea, I know, close only counts in horseshoes and handgrenades) They don't change a whole lot in south Texas. Kinda worries me to. But being a Pontiac powered Pontiac, seems to run out of torque. and horsepower. doesn't like 1/4 mile anymore.

Re: Turbo 400
 

I was lucky I had my kids running at all the same tracks too. They didnt like to change stuff so they made an unchanged run and I made a change. If I gained I could also judge for others or the kids ets.
Good Luck. Sounds like the pontiac thing of low end torque may be the real answer..

Re: Turbo 400
 

I went from a 10" conv and 3.90 to a 9" and 4.10 within a couple of races (old parts break easy, LOL) and that's when it slowed down. Put a longer duration cam in it and picked most of it back up. Then the cool weather came and picked up way more. Those small intake runner Edelbrock heads I think are hurting the air coming in. don't think they like anything bigger than 400", and I have 468.

Re: Turbo 400
 

Bobby, The 9 inch convertor needs maybe MORE cam yet. if it doesnt like it you know you have met the max flow for the heads with your set up. Have you shortened the headers primary yet? Or tried bigger tubes?

Re: Turbo 400
 

I did put bigger headers on it, don't remember right now how much bigger, maybe 1/8. But that did seem to help. Just need to save the $ and get me heads ported.


Actually the only reason for the header change was b/c my new Haulmark trailer ate the old ones, LOL. The ramp door is higher than the floor of the trailer and I hung the driver side header on it. That was $475 before I ever got the car out of the trailer.

Re: Turbo 400
 

Bobby, As much interest as you have in massaging your combination to always improve, have you considered running CLASS. Maybe Stock where many expenses can be limited by the rules but you have others as a standard to shoot for as a goal?

Re: Turbo 400
 

I would love to run stock. Would need to find a car to do it with. I drive a 94 firebird with a 3.4 v-6 that would fit into Z maybe, LOL. Wife has a 98 z-28 that we were toying with the idea of turning it into a stocker. But in the mean time, trying to sell 2 houses, buy some land and build us a new house to live the rest of our wonderful lives in.

Her Z would be a great one, maybe C or D. Except it has t-tops. This is a no option Z, no pwr window, locks, no cruise, nothing but t-tops and a z-28 emblem. To bad it has a/c, but living in the Houston area, you need it. Then we would have to find her something to drive everyday, like a 75 Camaro.