Rev Limiter
4th Gear Member
Joined: May 2008
Posts: 1,842
From: Santa Monica, CA
The safe limit is really what the stock rev limiter is set to
Our cars stop making power at 5250rpm's... when you are racing you should shift at around 5500 or 5600 ish...
Theres no reason to ever need to go up to 6500 and doing so even accidently can hurt something
Our cars stop making power at 5250rpm's... when you are racing you should shift at around 5500 or 5600 ish...
Theres no reason to ever need to go up to 6500 and doing so even accidently can hurt something
TECH SAVANT
Joined: Dec 2006
Posts: 10,937
From: Saint Augustine, FL
The stock rev-limiter scalar value in the tune is set to 1513, which for reasons known only to Ford represents 1/4 of the actual rev-limiter rpm; 1513 * 4 = 6052 rpm. Your tach may show something higher than this, but that's because of the tach's inaccuracy not because it's really set any higher (assuming an stock tune).
Personally, I think 6500 is fine as long as you don't plan on bouncing off that 5 times a day. It's probably (it's 7.5% over what Ford said was OK) pushing the stock cast bottom end and hyper-eutectic alloy pistons to 85% to 90% of their limits--but 85% to 90% is enough under 100% to provide some safety factor.
I have mine set for 6252 rpm (200 over stock, 1563 in the tune), which gives me a bit of headroom with out really banging the headboard on every thrust.
But as I have said in other posts, I bounce off the limiter at least once or twice a week...
Personally, I think 6500 is fine as long as you don't plan on bouncing off that 5 times a day. It's probably (it's 7.5% over what Ford said was OK) pushing the stock cast bottom end and hyper-eutectic alloy pistons to 85% to 90% of their limits--but 85% to 90% is enough under 100% to provide some safety factor.
I have mine set for 6252 rpm (200 over stock, 1563 in the tune), which gives me a bit of headroom with out really banging the headboard on every thrust.
But as I have said in other posts, I bounce off the limiter at least once or twice a week...
3rd Gear Member
Joined: Aug 2008
Posts: 912
From: Oklahoma
The stock rev-limiter scalar value in the tune is set to 1513, which for reasons known only to Ford represents 1/4 of the actual rev-limiter rpm; 1513 * 4 = 6052 rpm. Your tach may show something higher than this, but that's because of the tach's inaccuracy not because it's really set any higher (assuming an stock tune).
Personally, I think 6500 is fine as long as you don't plan on bouncing off that 5 times a day. It's probably (it's 7.5% over what Ford said was OK) pushing the stock cast bottom end and hyper-eutectic alloy pistons to 85% to 90% of their limits--but 85% to 90% is enough under 100% to provide some safety factor.
I have mine set for 6252 rpm (200 over stock, 1563 in the tune), which gives me a bit of headroom with out really banging the headboard on every thrust.
But as I have said in other posts, I bounce off the limiter at least once or twice a week...
Personally, I think 6500 is fine as long as you don't plan on bouncing off that 5 times a day. It's probably (it's 7.5% over what Ford said was OK) pushing the stock cast bottom end and hyper-eutectic alloy pistons to 85% to 90% of their limits--but 85% to 90% is enough under 100% to provide some safety factor.
I have mine set for 6252 rpm (200 over stock, 1563 in the tune), which gives me a bit of headroom with out really banging the headboard on every thrust.
But as I have said in other posts, I bounce off the limiter at least once or twice a week...