Turbo 400

[Tom Goldman]

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

[Dave Goob Cook]

Could slow you down too.....

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.

[Brian Oakes]

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

Brian

oakes2074@hotmail.com

[bobby]

Originally Posted by Dave Goob Cook

Could slow you down too.....

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.

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.

[Dick Butler]

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.

[bobby]

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.

[Dick Butler]

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..

[bobby]

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.