ISprayOnU

I have a 2005 Pontiac gto with Nitrous Outlet Direct Port kit 150 shot, cam, headers, exhaust, fast 102, Mallory 110 FP, Fuel Cell. I been looking on ls1gto for what gears to run on 300 shot. Some ppl say stay with the stock gears, some say 373 gears, some say 391 gears witch ones? Im doing a 408 iron block with 300 shot in December. Im doing all the suspension work this year and im looking at gears for the rear right now.

Killer5.3

iTrader: (1)

i would run the 3.73 gear .

THADD

iTrader: (12)

Trans and rear tire size should determine gear

GTA91

iTrader: (14)

Pretty much what he said.


Do you have an auto or stick? With auto I'd say leave the stock gears in there. With a stick I'd say it depends on if you have 26" or 28" tires. What kind of trap speed do you expect?

ISprayOnU

Srry its a auto

I seen a lot of the gto with 300 shot ran like high 130 to 140+mph. Some ppl say u can run out of gear? I street race to but also like drag racing. Try to get the best gears for both street/drag racing.

GTA91

iTrader: (14)

I'd leave the stock 3.46 gears in there... especially with an auto and a 408ci motor coming up. I run 3.50 gears behind my 402 and stalled auto.

Steeper gears become less important when you have:
a) a stalled auto
b) bigger cubes
c) nitrous

You'll have all 3...

I think you're bigger focus should be on the 408 build and the supporting stall and driveline upgrades.