Chevota question? (1 Viewer)

pb4ugo

SILVER Star
Joined
May 8, 2006
Messages
2,115
Location
spay-lay-wi-theepi, Ohio
a 350 small block is perfectly happy through 4000 rpm, so is a 283. That said at 2700+ rpm, with the exhaust as it’s currently set up on my rig, my EARS are not happy. A 350 SOUNDS like it’ll blow up at 3000rpm but I wouldn’t worry at all about holding it at 3500 on long trips if gearing made the necessary. I’d get more than a little nervous at 5000rpm.

Chevy advertises their crate SBC redlines at 5500 rpm and I am confident they’re right.
5500 rpm is more a limitation of the cam profile. I've run my crate SBC past 5500. My 1st SBC would sit on 8k, the top end and cam was designed for 11.5+ compression or better. My SBC had 12.5:1 comp along with other goodies. It was fun, especially on the street. The bottom end will only go as fast as the top end can supply it. I quit running a tach yrs ago, its sort of useless with a sbc. They rarely get valve float, which is an indication that you may have gone too far.
 

RWBeringer4x4

Mechanically Challenged
SILVER Star
Joined
Jul 11, 2012
Messages
5,249
Location
The People's Republik of Maryland
5500 rpm is more a limitation of the cam profile. I've run my crate SBC past 5500. My 1st SBC would sit on 8k, the top end and cam was designed for 11.5+ compression or better. My SBC had 12.5:1 comp along with other goodies. It was fun, especially on the street. The bottom end will only go as fast as the top end can supply it. I quit running a tach yrs ago, its sort of useless with a sbc. They rarely get valve float, which is an indication that you may have gone too far.

oh you can absolutely build them to spool WAY up, I just meant in stock format, there’s not a chance I’d worry about spoiling them up past 3000 rpm for extended periods of time.
 

RAYJON

Get a bigger hammer..
Joined
Oct 20, 2005
Messages
1,876
Location
Reno NV
Back to the original question, trailer it you will be a lot happier when you get home...or get an 80 series it will do 80mph all day long comfortably..
 

Users who are viewing this thread

Top Bottom