Mullettt

iTrader: (1)

The car is a H/C/I car full bolt ons and has went a best of 1.56 on a 26in slick with strange adjustables. The car has went 11.3. My question is would 4.30s be the ideal gear since i plan on staying naturally aspirated? I would like to go as fast as possible with the stock bottom end. Even launching at 6,700 rpm it dead hooks and then bogs so bad i lose all momentum. Any help would be great thanks guys!

HCI2000SS

iTrader: (2)

With a 26" tire i'd go no higher than a 4.10 personally, but that's up to you obviously

Mullettt

iTrader: (1)

I'm being told since I don't want to spray it to go 4.56s. Basically it's a cruise around town car but mostly track toy. Would those gears help and should I switch to 28s?

Sladester2

iTrader: (1)

4.10s with 26 inch tire.... 4.30s or even lower with a 28 inch tire

guppymech

iTrader: (7)

What rpm and mph are you going thru the traps at? I've read it's best to be at or above peak HP rpm. Select your gear/tire combo to match that. FYI 26"/4.10, 27"/4.30 and 28"/4.56 tire gear combos all have almost the same effective ratio discounting tire growth. Check out this recent thread for some good info and link to a good HRM article.
https://ls1tech.com/forums/gears-axl...re-advice.html

Mullettt

iTrader: (1)

I go through the traps at 121 122 with an occasional 123. I have ran the car since september so i dont really remember what the rpm was.

JakeFusion

iTrader: (7)

At your speeds, the 4.30 with a 26" tire will get you through the traps around 123 @ 6900RPM discounting tire growth. So unless you plan to make more power, the 26"/4.30 combo would maximize your ET with your current setup.

28" with 4.56s would get you to 123 @ 6750. So you'd have a little growth there.

Hardtop

iTrader: (3)

My 2001 in sig ran the best time with 4.30's and 27" QTP's. I'd go with 4.56's for a 28" tire.