best rpm for shifting?

[subiekillrGST]

Hey everyone, I have searched and couldn't find the answer to my question. I was wondering what is the best rpm to shift at when racing in a 1/4 mile or general racing. I just installed a forced performance actuator, and iam still adjusting it to find the right boost. Last week I ran 14.5 at 96 mph shifting into second at 6200rpm, shifting into third at around 6500 rpm, and by the end of the 1/4 i would hit about redline around 6900rpm. I was wondering if there is a better ways to shifting. I am running 15psi which is still dropping off to 12psi by redline. I tried shifting at 6000 rpm a couple runs but it seemed i bogged my car when shifting that low. Any suggestions would be great.

 

[oddrob]

All cars are a bit different, dependant on many factors. You can run it on a dyno and see what your hp, and torque curves are and that would tell you all you need to know.

 

[1fast97gsx]

1st and 2nd I'd take it to 6800 or so and 6500 after that. ( If you indeed have a t28 ) You need to dyno it to really see where your power drops off, however that seems like a decent time for your mods. The fact that you are fwd really hurts in drag racing.

 

[subiekillrGST]

I counted the blades on the wheel and it matches the number of a t28. But i have a t25 housing. It seems power drops off after 6500rpm, but if i shift below 6k it will bog a little. Thanks for the help everyone.

 

[GSTBlack95]

I think if I remember the t-28 looks like a t-25...so it might end up using the same kinda houseing, someone correct me if I am wrong.

 

[AWDGreenMachine]

The t-28 uses the stock t-25 housing...just a diferent wheel.

 

[grans0o]

Well, I take 1st up to 7000rpm, and then take 2nd to 6500, and 3rd to 6500, and get to stay in 4th for about 1.5 seconds before I cross the 1/4. Shifting into 4th has helped me out quite a bit though for trap speed as apposed to taking 3rd up to 7000. Oh, and I launch my fwd at 3500-3700rpm. It seems to work rather well for me.