Black8Banger

iTrader: (9)

Ok, the car is a drag car, driven on the street less than 3 times a month. Ive got a Moser 9" w/ 3.70s, TH-400 w/ 3800 stall and a transbrake and 26" tall tires. Running stock heads and a 228/232 cam my best et has been 11.6s on 3455 race weight. I have to shift around 6200 with that cam. Im not happy with shifting at 6200. I wanna go all the way to 6700-6900. Is the Trex what I need? If I get this Trex, do I need to go to a 28" tall tire? change rear end gearing? Thanks

Josh

luv2spd

iTrader: (1)

Yeah, the t-rex needs to be shifted at 6800-7000 to net the best times.

Black8Banger

iTrader: (9)

so it would definately be a good addition to my setup...even though its a th400 and not a 6 speed

Josh

iTrader: (9)

I would think so. It doesn't "peak" as high as people make it sound, but it carries its power for quite awhile. You would probably want a numerically higher gear ratio, as well.

Josh

DanZ28

iTrader: (5)

The Trex typically peaks around 6800 and carries well into 7400 RPM. Yes you will benefit from gears with this cam as well, 4.10's minimum I would say and probably loves 4.56's..

Dan

tim99ws6

iTrader: (31)

4.56's in a TH400 huh....

35th SS

iTrader: (2)

ya thats what I say on a th400.good luck.using a 28x12.5x15 et streets here.

DanZ28

iTrader: (5)

Sorry guys, another brain fart for me, didn't even take in it was a TH400. Still think 4.10/4.11's would work well for the TH400 setup, same as what my bro used to run..

Dan

Black8Banger

iTrader: (9)

so probably use 4.10/4.11 with a 28" et drag and shift around 7k?

calongo_SS

iTrader: (7)

I think most people have had the best results shifting around 7200. I would think 3.90's to 4.11's should be pretty good for gears. You'd probably see some ET improvements with a 4200 or bigger stall also.