Boosted Firehawk

iTrader: (11)

what shift points is everyone using on their cars with a turbo?

what RPM are you all shifting the gears with either manual valve body or just leaving it in drive?

thanks for the input.

67Firebird455

iTrader: (27)

Wish I had some insight, I've got a TH400, but it's got a RMVB in it and haven't gotten it running yet. =\ I am curious too, but really believe it's going to variate quite a bit depending on build/vehicle it's in too.

Boosted Firehawk

iTrader: (11)

Ya thats what im thinking as mine is RVMB as well. But the shift points should be somewhat the same as everyone for starting off purposes. THEN adjust from there on out.

Are people using adjustable vacuum modulators?

What are you guys using to control the shift points?

ronnieforrester

iTrader: (3)

I'm shifting at 6800- the 4.8 likes to rev.

BMF_Racing

iTrader: (6)

Stock cams? Stock long block?

lsx74camaro

Get it dynoed then shift a little passed its peak horsepower rpm. Turbo, n/a , whatever shift at the peak so your rpm dont drop that much. Had a rvmb th400 behind a 600hp BBC, now have a transbrake rvmb th400/gear vendors od behind a 76mm 5.3.

Boosted Firehawk

iTrader: (11)

TU1 cam, stock long block, built 1500hp th400 on the brake and 3.23 geared.

BMF_Racing

iTrader: (6)

Pending on your avg Tq curve, that can swing your optimal shift point 200 rpm before to after your peak Hp. Dyno it and post a graph up.

robsquikz28

iTrader: (246)

what converter do you have?

Boosted Firehawk

iTrader: (11)

I dont have one thats why I really need to know.

I need to order a converter and they are asking me

c0ncEpT

iTrader: (4)

Shift it higher until it stops gaining MPH.

Cam72aro

iTrader: (28)

Converter is probably going to need to be in the 3000-3500 range to start. That seems to be where most setups go, depending on vehicle weight and gears.

Boosted Firehawk

iTrader: (11)

thanks I will let em know

Wicked69

I wouldn't rev a stock 5.3 over 7k in a boosted application and a 6.0 I wouldn't rev over 6500. On my stock 5.3 I have my rev limiter set at 7k. It is easy to hit, lol I try to shift it at 6500 if I can shift fast enough. I put in a PTC3400 and my car went from a 100mph in the 1/8th to a 118.42mph in the 1/8th.

If you get a PTC in the 3400-3800 range you probably will be close. Once you figure out how much it is off, then send it in and have it tweaked.