Two things...
Registered User
Joined: Oct 2000
Posts: 7,134
Likes: 3
From: Columbia, MD
Armando,
I agree, 200 rpm isn't much to worry about. It only adds 4-5% extra stress, and I'm sure that could be considered within the basic tolerance levels of just about any conrod.
Sonic, You got it. Raising the redline itself is a no brainer for most ECUs (such as AEM), it's the other hardware that may disagree with the change if it's too dramatic or goes on too long. It all depends on what you'e willing to give up. You could lower the redline by 1,000 and see a slight increase in engine longevity (on average, but this means hundreds of engines, not just a single case). You could raise the redline to 15,000, but if you never go above 9,000 you'll see no difference whatsoever. Try spinning the stock hardware to 15,000 and you'll see things go bye bye.
Oh, should you happen to increase the redline in the future and choose not to increase stock internals, seriously consider uprading at least the springs (using intake springs on the exhaust side, at the VERY least). If you don't, you'll end up slamming a valve edge into the piston face, and that ain't pretty.
I agree, 200 rpm isn't much to worry about. It only adds 4-5% extra stress, and I'm sure that could be considered within the basic tolerance levels of just about any conrod.
Sonic, You got it. Raising the redline itself is a no brainer for most ECUs (such as AEM), it's the other hardware that may disagree with the change if it's too dramatic or goes on too long. It all depends on what you'e willing to give up. You could lower the redline by 1,000 and see a slight increase in engine longevity (on average, but this means hundreds of engines, not just a single case). You could raise the redline to 15,000, but if you never go above 9,000 you'll see no difference whatsoever. Try spinning the stock hardware to 15,000 and you'll see things go bye bye.
Oh, should you happen to increase the redline in the future and choose not to increase stock internals, seriously consider uprading at least the springs (using intake springs on the exhaust side, at the VERY least). If you don't, you'll end up slamming a valve edge into the piston face, and that ain't pretty.
Registered User
Joined: Jan 2004
Posts: 310
Likes: 0
From: miramar
your redline is nothing more than the the maximum safe number of rotations per minute your engine will turn- this obviouslly has nothing to do with electronic controllers- merelly your engines design. The "redline" raising you are refering to is actually raising the threshold of the electronic rev limiter that wont allow you to rev past a certian point. this revlimiter is purelly digital, and can be gotten rid of entirelly- letting you rev as high as you want- now are you ready to deal with the consecuences of a 12000 rpm run?- there is a reason why racers rebuild their engines so often. Your redline is lower than the other model years not because honda felt it to not be necessary to add extra horsepower, but because with a longer stroke your engine would have a hard time running safelly at such a high speed.-its a tradeoff- engine rotations for more torque and higher displacement.
Thread Starter
Registered User
Joined: Mar 2004
Posts: 405
Likes: 0
From: miami springs
Originally posted by designfreak
your redline is nothing more than the the maximum safe number of rotations per minute your engine will turn- this obviouslly has nothing to do with electronic controllers- merelly your engines design. The "redline" raising you are refering to is actually raising the threshold of the electronic rev limiter that wont allow you to rev past a certian point. this revlimiter is purelly digital, and can be gotten rid of entirelly- letting you rev as high as you want- now are you ready to deal with the consecuences of a 12000 rpm run?- there is a reason why racers rebuild their engines so often. Your redline is lower than the other model years not because honda felt it to not be necessary to add extra horsepower, but because with a longer stroke your engine would have a hard time running safelly at such a high speed.-its a tradeoff- engine rotations for more torque and higher displacement.
your redline is nothing more than the the maximum safe number of rotations per minute your engine will turn- this obviouslly has nothing to do with electronic controllers- merelly your engines design. The "redline" raising you are refering to is actually raising the threshold of the electronic rev limiter that wont allow you to rev past a certian point. this revlimiter is purelly digital, and can be gotten rid of entirelly- letting you rev as high as you want- now are you ready to deal with the consecuences of a 12000 rpm run?- there is a reason why racers rebuild their engines so often. Your redline is lower than the other model years not because honda felt it to not be necessary to add extra horsepower, but because with a longer stroke your engine would have a hard time running safelly at such a high speed.-its a tradeoff- engine rotations for more torque and higher displacement.
Heh...not for nothing, but you pretty much just summbed up everything we had disscussed...
