Camaroguy

iTrader: (2)

If i had a 12 bolt with 4.11's or 3.90 ranged gears. ET street tires and also a Spec stage 3 clutch. With my mods below what do you guys think i could run in a quarter mile?

LSs1Power

iTrader: (5)

With ET streets and 1.7 60ft i would say mid to high 12's at 108-110mph without NOS and low 12's at 115-117mph with NOS.

Camaroguy

iTrader: (2)

LOL, you just mentioned the exact times i run with my current setup. N/A 12.7 @ 109-110. N20 11.8-12.1 @ 116-118.

Now, What would i run if i added the new clutch and 12 bolt with 4.11 or 3.90 gears? Since the times i mentioned above are times i already run without the 12 bolt and clutch.

LSs1Power

iTrader: (5)

Maybe u will improve your ET N/A run due to the shorter 4th gear, but u might lose 2mph due to the 12 bolt. I don't see the 4.10's helping that much with 118mph in traps and 25inch tire. If i remember correctly, 25 inch tire, 4.10 gear will redline around 118mph in 4th gear. Try bumping your rev limiter to 6300RPM or get a 26inch tire and u should be fine. Either way u might see a improvment in your 60ft which means better ET, but loss in your MPH. Good luck.

LASTLS1

iTrader: (7)

I don't think you will gain anythng. Just a stronger drive train.

ONGRNGO

I think he will get some better times, going from a stock 10bolt which you cannot launch hard on, to a 12bolt rear that you could launch at between 5 and 6000 RPM, plus the deeper gear he should be able to cut a couple of 1/10s off the 60ft, then of course the 1/4 times will get better, or they should!

Also if you up grade the Clutch and rear it would be a good time to upgrade the stock DS to otherwise you will tear the stock one into 2 pieces in no time!

Dan