maximum rpms?
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: Mar 2004
Posts: 4
maximum rpms?
I have a small block 400 i been told was bored .030 over. i'm really not sure, but to be safe, i'm going to assume the bottom end is stock. the heads are world sportsman II 200cc heads, the intake is a torker II, which i'll probly be swapping for a performer rpm. i don't know much about the cam either, i wasn't given a cam card, but through motors i've had and built in the past, i can make a rough estimate that the duration is in the 280 ballpark, and probly somehwere around a 500 lift. i checked the timing at idle, and it is 11 degrees advanced. my question is where is the safe range for maximum rpms? i want to set a rev limiter, but don't know where to set it at. the motor makes power past 5,000 rpms, but i don't want to push it too far without some advice or guidance from someone who knows this kinda information a little better.
#3
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Posts: 4,137
Re: maximum rpms?
Originally Posted by z28camaro82z
I have a small block 400 i been told was bored .030 over. i'm really not sure, but to be safe, i'm going to assume the bottom end is stock. the heads are world sportsman II 200cc heads, the intake is a torker II, which i'll probly be swapping for a performer rpm. i don't know much about the cam either, i wasn't given a cam card, but through motors i've had and built in the past, i can make a rough estimate that the duration is in the 280 ballpark, and probly somehwere around a 500 lift. i checked the timing at idle, and it is 11 degrees advanced. my question is where is the safe range for maximum rpms? i want to set a rev limiter, but don't know where to set it at. the motor makes power past 5,000 rpms, but i don't want to push it too far without some advice or guidance from someone who knows this kinda information a little better.
#4
Junior Member
JOURNEYMAN
Join Date: Dec 2005
Location: Fort Smith
Posts: 29
I had a 400 .060 over that had a stock lower end that I turned 6500 every chance I had to race. Had a buddy that had 1 that for $20 would bury the tach needle to 8000 rpm's. He never blew it up. And I was always told they wouldn't live past 6000
#6
Originally Posted by fbodyjunkie
I had a 400 .060 over that had a stock lower end that I turned 6500 every chance I had to race. Had a buddy that had 1 that for $20 would bury the tach needle to 8000 rpm's. He never blew it up. And I was always told they wouldn't live past 6000
Dave
#10
Senior Member
RACING JUNKIE
Join Date: May 2006
Posts: 2,044
Originally Posted by fbodyjunkie
I guess I didn't make it clear. My buddy had 1 also. I never would let someone else race my junk. Mine was balanced with stock crank and rods, with Venolia pistons.
I'm thinking 6500 tops.