02NBMWS6

iTrader: (22)

without having to shift to 5th in the 1/4? I want to be able to trap in the 130s without running out of gear in 4th gear in my T56, 4.30 geared car. Can i do it on a 28" mt et drag with a 7100rpm limiter??

f-body.org/gears this calculator says i can, but alot of people i have talked to say it wont work at the track.

Which is it?

Thanks guys

daniel6718

iTrader: (36)

close...you should...if the tires are truely 28 inches, not worn down,just shift to 5th if needed, just dont spray it

02NBMWS6

iTrader: (22)

? i highly intend to...

the tires are 28.1 from summit's info

02SOMWS6

iTrader: (6)

I trapped 129 with 4.30's and 28" tires on spray. I just got the car retuned and picked up 22 rwhp and 33 rwtq NA and I picked up a ton on tune for the spray so I should trap over 130mph next outing. You will be fine with the 4.30 gears. You will have plenty of gear left NA and you will not have to shift to 5th with NOS. The 4.30's worked out great for me

02NBMWS6

iTrader: (22)

yes! this is what ive been wanting to hear! what is your rev limiter set at? what kinda power did your car put down?

nice to hear it from a 10 sec n2o ws6 owner

02SOMWS6

iTrader: (6)

check your pm

daniel6718

iTrader: (36)

i meant not to spray 5th...if you go into it

Camaroholic

iTrader: (1)

I plan to do it. I went 134 with 4.56's and MT 28" ET Drags. I was banging my rev limiter at the end (forget where it was, somewhere around 7200-7300 I think). I dropped the gears down to 4.30's, have yet to run 'em tho.

Slow Z28

iTrader: (19)

I think if you take into account .5" for tire growth on the ET Drags, you'll be ok. It'll end up being RIGHT there in my opinion. I think 132-135 might be around the limit(after looking at the calculator) It says 140 mph at 7100 with a 28.6" tire with 4.30's and a 1:1 ratio in 4th gear. I didn't input anything else for 1st, 2nd, 3rd gear

DanZ28

iTrader: (5)

By my calculator, you should be able to do 135 MPH.

mike c.

iTrader: (1)

i go 133mph on the spray m6,26'' tire 7,200rpm rev.and i cross in 4th grar.

Notime383

iTrader: (6)

4.30's with 28" tire are good upto 137mph in 4th gear 7100rpm ! Good Luck!

02NBMWS6

iTrader: (22)

Tires ordered!

I'll post up results soon.. that is, when my pro stars get here

TNTaddict

any link to calculate the trap speed on my setup??? th400,4.56 and 28" (M/T drag)..

Camaroholic

iTrader: (1)

Depends on the slip of the torque converter as to where your RPMs end up at. Until you know your actual real slip of your converter, calculators will be wrong. It could be anywhere from 200 to 1000+ RPMs. I'd say that odds are good that you won't get much over 130 with that combo tho, assuming ~7200 limiter.

12secSS

iTrader: (30)

FYI: Jen ran 136 MPH with a TH400 (90% efficiency), 4.33 on 29.5" tires with the rpms at 7300 rpms through the traps. If she did it with an auto, you can as well. Just remember, slicks will grow on the top end so those calculators are not that precise.

WS6TransAm01

iTrader: (13)

7100RPM with a 28" tire, according to a gear/mph calculator you should see 138MPH

Using the same calculator you did. I have used it in the past, and it has worked out in the past for me to be prety accurate.

383ss

iTrader: (14)

with 4.10's and 28's, I was on the limiter at 138. limiter was 6800

02NBMWS6

iTrader: (22)

thanks man, thats what i needed to hear