aaronware76

iTrader: (2)

Hi guys. I'm making some changes this winter from a 3.89 gear on 26" tires to a 4.30 gear and 28's. I'm a m6 and a 9" with 460rwhp na spinning out of the hole with a best 60' of 1.71, eighth mile time of 7.4-7.8 depending on how bad I spin. My mph is 92-95 in the eighth mile. Ls7 clutch. Hopefully spraying a 50-100 shot next year also. My question is, should I expect my mph to drop and et to drop assuming I'm hooking better out of the hole or can I assume my mph will stay the same? I need to know this to help determine what gears to select. 4.30 or 4.56

HCI2000SS

iTrader: (2)

From what I've seen mph stays fairly consistant as long as you aren't spinning much or not pulling a monster 60ft

aaronware76

iTrader: (2)

I'm definitely expecting my 60' to go down into the 1.6's or even 1.5's. I figure with the steeper gear and what should be way better traction, I've got the power to cut some high 1.5's I hope. As long as my clutch holds together that is. This will be a test of how strong it is.

scotty2000ss

iTrader: (2)

How much heavier are the 28's? That may slow you down a tad.

aaronware76

iTrader: (2)

I'm not sure. I'm gonna be purchasing some 15x10 race Stars to replace my 16" firebird wheels that the drag radials are on so hopefully it's a wash. While we're on that topic, my 60' and mph were actually better on a Hoosier 255/50/16 dot drag radial compared to a 26" quick time pro bias ply. I expected the mph increase but not the better 60'. And it was massive wheel hop too.

scotty2000ss

iTrader: (2)

Have you played with the fbody gear calculator website?

aaronware76

iTrader: (2)

Oh god, absolutely. Way too much probably.

aaronware76

iTrader: (2)

From what I figure, I need 4.30's to put me in my power band and leave a little room for when I eventually spray. Also, I run 1/8 mile mostly so I gotta make sure I've got room to top out third without having to shift to 4th in the eighth mile. However, the car is more of a street car than strip car so I was looking for the fun factor of 4.56's on the street. That's why I'm torn. Don't wanna regret only going to 4.30's

johnson4391

I would run the 28 with the 3.89 gear you have.

aaronware76

iTrader: (2)

Why? To cross the line at 6800, I'd have to be going 110-112 in the eighth and 146 in the quarter. No way is a 100 shot gonna gain me that much mph.

murphinator

iTrader: (2)

1/8 mile your thinking right , you want to be maxxed out in 3rd at the traps- but you will have too much gear for 1/4 if you should ever do that on a 100 shot with anything over 4.11 IMO unless your running a tall tire, then 430 may max you out in 4th.

I am thinking 430's on a short tire for 1/8 in 3rd gear and tall tire for 1/4 but you might be pinging the limiter on a 100 shot...