xe268 cam and gearing
Thread Starter
Joined: Dec 2005
Posts: 6,499
Likes: 31
From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
xe268 cam and gearing
Got an engine swap planned, and I'm trying to decide on cams.
It's gonna be ~9.8:1 SCR Vortec-headed 350 that's .060 over... I figure an xe268 wouldn't be a bad street cam for that.
But what Im worried about is what kind of gearing I'm going to need. What would you guys suggest? And can I make the 2.73's I have work until I getsomething better or am I going to hate life with them?
I'm more concerned about making it a good street car than 1/4 mile ET's.
A new stall and new rear are on the "To Get" list, but so is half the motor and the exhaust...
The motor and exaust gets priority for now.
It's gonna be ~9.8:1 SCR Vortec-headed 350 that's .060 over... I figure an xe268 wouldn't be a bad street cam for that.
But what Im worried about is what kind of gearing I'm going to need. What would you guys suggest? And can I make the 2.73's I have work until I getsomething better or am I going to hate life with them?
I'm more concerned about making it a good street car than 1/4 mile ET's.
A new stall and new rear are on the "To Get" list, but so is half the motor and the exhaust...
The motor and exaust gets priority for now. Supreme Member
Joined: Jul 2005
Posts: 1,675
Likes: 3
From: Arab, Alabama
Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27
Re: xe268 cam and gearing
If the engine is out, a slightly higher stall would really wake it up. With the 2.73s you will get better mileage. Gears are a lot harder of a mod and more expensive than a converter. The 268 is close enough to stock that it will work with a stock converter if you're close on cash and have plenty of time.
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iTrader: (1)
Joined: Jul 2004
Posts: 10,763
Likes: 4
From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: xe268 cam and gearing
Yea, you can drive the 2.73s, but it'll just be sluggish on takeoff (with stock stall).
The 350 will probably be just slightly better on takeoff then your 305 now, until you get a bigger stall and taller gears - so it's not going to be WORSE than where you are now.
A swap to 3.23's would work pretty well, or 3.42s. I'm assuming you don't have a posi now. So a 3 series posi and gears will set you back ~$600 or more, plus parts to install, and tools if you're doing it yourself. Budget $800 or so.
The cheaper route is to get a thick gearset and leave it as an open rear - which is kinda annoying, but only $300 or so when the smoke clears.
The 350 will probably be just slightly better on takeoff then your 305 now, until you get a bigger stall and taller gears - so it's not going to be WORSE than where you are now.
A swap to 3.23's would work pretty well, or 3.42s. I'm assuming you don't have a posi now. So a 3 series posi and gears will set you back ~$600 or more, plus parts to install, and tools if you're doing it yourself. Budget $800 or so.
The cheaper route is to get a thick gearset and leave it as an open rear - which is kinda annoying, but only $300 or so when the smoke clears.
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