09-21-2003, 05:37 PM
|
 |
CC Member
|
|
|
Join Date: May 2003
Location: Bugtussell,
AR
Cobra Make, Engine: FFR 4859GT Spyder GT 414W EFI
Posts: 257
|
|
Not Ranked
Howdy,
The current Nascar compression rule is 12.00:1cr. Its been that way for several years.
Today, Bobby LaBonet turned his SB2 Chevy ( a 357 cid SBC w/ SB Ford heads) about 9,900rpm's when he shifted into 2nd instead of 4th and it stayed together.
Depending on the track, they sometimes turn their engines over 9,200rpm's on every lap (usually on the tracks 1 mile or shorter). The engines that they ran in todays race had to run between 550 and 700 miles.
You could build a Nascar style engine for the street (milder cam and 'bout 11.0:1 cr), kept the revs below 8,000rpm's, it would last a long time, say 3 years @ 10,000 miles a year, maybe more. You would need the change the valve springs once a year. Maybe your cam, lifters and pushrods after the 2nd year. Just my $.02 . 
I'm building a 351C that I'm planning to turn 7,000rpm's and drive about 10,000 miles a year. I'm planning on it last 3 years before refreshing(rings, bearings, cam, lifters and valve springs).
Paul
__________________
"A veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of 'up to and including my life.'" (Author unknown)
|
Threaded Mode
