1Ls1

iTrader: (20)

Currently have a 9" with 350 Gears, tryin to get rid of some cam surge but still want to finish the 1/4 mile in 4th....was wondering what the highest gear i can run is, i was thinkin 370,375,389.........

ssvert99

iTrader: (26)

depends on what rpm your engine is capable of still making power efficiently. also power adder? we can help you more if we have better info.

1Ls1

iTrader: (20)

225 direct port kit, 6800rpm redline, mid to low 9's

TurboStangJON

iTrader: (27)

Sounds like the gears you have now would be efficient for low 9's. What size tire?

Oldsmobility85

iTrader: (1)

What kind of rpm are you going through the traps at now?

1Ls1

iTrader: (20)

26" tire........trying to get rid of some cam surge cruisin around town, the cam calls for a 4.30 gear and im tryin to get as high as a gear as i can and still run 9's, thats why i was thinkin about going with a 3.70 or 3.75 gear

havent been to the track yet in this car

TurboStangJON

iTrader: (27)

I used one of those Tire Height/MPH calculators and it said @6800 in 4th gear with a 3.70 would be 140-141 MPH on 26" tires. I don't know how accurate those calculators are but that's what I came up with.

Oldsmobility85

iTrader: (1)

I would imagine that is pretty accurate in a stickshift car minus tire growth. Auto cars are way different with converter slip percentages.

TurboStangJON

iTrader: (27)

Maybe make a 1/4 mile pass and see how much room you have to grow.

bayer-z28

iTrader: (14)

****, I finish in 4th at about two or three bounces off the limiter @ 6800. Stock rear @ 3.42, 26" tire. Haven't been to the track in a while tho.

Cam surge is gonna be worse w a smaller gear.

TurboStangJON

iTrader: (27)

What does your car trap?

ssvert99

iTrader: (26)

3.70 will be a great gear for you with the 26" tires. HSESWS6 here has almost the exact same combo as you, but with 28" tires and he uses a 3.89 gear. if the gear is correct for the mechanical aspect of things and you are still experiencing cam lope issues with driveabilty, then maybe try to change your engine tune a bit in that area which should help.