What if Dot-Dot was off by a tooth?
Thread Starter
TECH Veteran
Joined: Feb 2002
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From: Loganville, GA
What if Dot-Dot was off by a tooth? How much of a power loss could occur? Or would the motor even run right? trying to chase down a strange power loss and looking at all my options.
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Joined: Nov 2002
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From: Chicago Heights, IL
Did you do the cam install yourself? If so, I really dont see how you could have mixed it up because if you didnt have it right, it would be very obvious. Did you triple check that it looked like this before putting it back together?
Thread Starter
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Joined: Feb 2002
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From: Loganville, GA
yeah...ive done like 6-7 cam swaps before.....i even had someone else check it. runs smoothe. I swear i even checked the freakin box the old cam was in to make sure i didnt get them mixed up. hahaha....
im just at a loss here....
im just at a loss here....
Last edited by BLKWS6; Feb 17, 2004 at 09:16 AM.
It would run fine with one tooth off eitherway (Advanced or retarded). It could be down on power or move the power band around a little, but nothing wrong with it. I dought you would even notice that little of a change. Good luck!
Jeff
Jeff
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My cam was put in a few weeks ago,dynoed it and lost some power and the cam fell off quickly at 5400,when it should have pulled to 6200.The cam was off one tooth.What a difference it makes.The car run fine,just down on power.
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Joined: Feb 2002
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From: Loganville, GA
Like i said...the graphs peak within 100 rpms of each other it not at the exact rpm. i couldnt have drawn the graphs any closer. Just trying to eliminate possible suspects here.
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
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From: Texas
That is why you always want to check you VE's with degree wheel to ensure the cam is ground right, and the timing marks are correct. Otherwise its all a guess.
If you know how many teeth are on the top gear you can figure out how many degrees 1 tooth is. If you know the top and bottom gear counts you can figure out what being a tooth off top or bottom is worth. Keep in mind 1 tooth at the bottom is far greater than 1 on the top gear as there are fewer teeth, so the offest becomes greater.
If you know how many teeth are on the top gear you can figure out how many degrees 1 tooth is. If you know the top and bottom gear counts you can figure out what being a tooth off top or bottom is worth. Keep in mind 1 tooth at the bottom is far greater than 1 on the top gear as there are fewer teeth, so the offest becomes greater.
Launching!
Joined: Nov 2001
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From: Wilmington DE
Well, being off by one tooth would effect the peak of the new cam. But since you have two different cams, the "real" peak of this cam should be different then your previous, but if it is off a tooth or so, you just moved the peak around. It could have just ended up getting moved to where your previous cam peaked too. Would be a pretty strange coincidence, but anything is possible.
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From: Loganville, GA
Originally Posted by J-Rod
What are the two cams in question. How much advance is ground into each one? One tooth is normally quite a bit of advance or retard (like 10-12 degrees).
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From: Loganville, GA
Originally Posted by Jim98TA
Well, being off by one tooth would effect the peak of the new cam. But since you have two different cams, the "real" peak of this cam should be different then your previous, but if it is off a tooth or so, you just moved the peak around. It could have just ended up getting moved to where your previous cam peaked too. Would be a pretty strange coincidence, but anything is possible.
