TS6

iTrader: (41)

Any reason why you are not better off (assuming you have room) to have more gear (like a 4.10) and a larger tire (like a 29.5) vs. a 28" and something like a 3.73? Is it just the space issue? This would be on a mid 9 second car, A3, etc.

FANTAZ28

iTrader: (2)

its all math... rpm? mph?

TS6

iTrader: (41)

Trying to keep the R's under 6600 ish, maybe high 13x's mph?

FANTAZ28

iTrader: (2)

why under 6600? that is low for a blower ls1

Z-RATED94

iTrader: (6)

I thought more tire and a higher stall was the way to go?

ndfrsd6

iTrader: (5)

im running 4.11's with a 28 et drag ,5200 stall ......also im revving to 7200 rpms

promod1955

iTrader: (44)

take for example a 26" tire and a 3.73 gear. It has XXX amount of contact patch on the ground. Then step up to a 28" tire and say a 3.89 gear. It has an even bigger contact patch on the ground, yet the Rpm's are going to be very close to the same.

There comes a point when too much tire for a given car will slow it down though. Figure out what rpm you need to be at going through the traps, then play with gear and tire combinations to fit your application.

TS6

iTrader: (41)

Different car, nitrous car. It could be spun higher, just trying to get numbers without beating it to death yet.

Pro Stock John

iTrader: (34)

4.11's and 28's work nice.

TS6

iTrader: (41)

For what trap speed/ET though?

I have room for a 29.5, thats why I'm thinking.

Pro Stock John

iTrader: (34)

this for nitrous right?

tuff went 9.4 with 4.11's, 28's and stock cubes and a big shot.

i went 10.00@133 with 150 shot and h/c 348ci. on 200 shot would have been 9.5-9.6's.

JL ws-6

iTrader: (50)

I've gone 9.6 to 9.5 with both 3.73 and 4.10 with a 28. Honestly I put the 3.73 to try to calm it down for the first 60 feet. Which, didn't work Car still went on the bumper. Only thing it did was drop the rpm about 200 to 300 rpm thru the traps. Seeing 142 to 143 mph last time I ran the car.

joblo1978

iTrader: (14)

Very important to mention whether you have an auto or manual when you're talking about tire and gear sizes.

Everyone seems to forget that little bit of info.

joblo1978

iTrader: (14)

Not necessarily

TJ

iTrader: (10)

evenly matched the taller tire and gear are going to perform better, and be more consistant.
larger sidewal, its a no brainer.
with a numerically higher gear, your reaction times will be quicker even though the final ratio would be the same. wont make the et any quicker, but it does help off the line.