AndysC3

iTrader: (14)

My previous best was a 13.2@99.57 with the mods in my sig. If I switched to 4.10s and a 31" tire, how would my 1/4mile change? Im thinking it will be about the same if not alittle better. What do yall think?

mhotrodscooter

iTrader: (13)

I would think your going to slow down. You need the gear to get that heavy pig moving.

AndysC3

iTrader: (14)

But with the smaller lighter tires it shouldn't be to bad. It came stock with 3.73s and 31.5" tires. I guess I need to get the tires on there and see what it crosses the traps at.

Gadgetized

iTrader: (9)

If you are just changing gears, and not tire size, I think it is going to hurt your 1/4 mile time pretty good. If you have the 285/70/17's on now, you should be crossing the traps at about 4600 RPM's in drive. If you switched to 4.10's, 99 MPH would be about 4100 RPM's in drive. If you switched to a 31" tire with 4.10's, you would be going 99 MPH at about 4400 RPM's. Give or take.

AndysC3

iTrader: (14)

Im crossing the traps at about 5300 in 3ed gear now. with the 31" and 4.56s Itll be around 5800. Im shifting at 6700 and drops to about 5100.

mhotrodscooter

iTrader: (13)

ive always been told you wanna cross at the same rpm you shift at. id like to try more gear. i think with your tire size your closer to a 4.10 gear. i run a 31'' tall tire on the street and a 28'' at the track. i think i cross at 5800rpms also,

chevyboy.520

iTrader: (6)

Try the shorter tire first. See how you like it. Then go from there. You should gain something. Lighter and shorter...