standard or stright cut gears...whats the diferance....more hp and more noise.motor size 2332cc any body know how much to expect?? just the the facts mam
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standard or stright cut gears...whats the diferance....more hp and more noise.motor size 2332cc any body know how much to expect?? just the the facts mam
In general straight cut gears transmit power without generating a side load. Helical cut gears will try to force the gears "apart" side to side. Straight cut gears will have less "losses" than other types because of this. They also tend to be noisier. Exactly how much "savings" you'll get is debateable...
The side load generated by the helical gears cause wear on the cam bearing that absorbs "thrust". When coupled with heavy valve springs, higher RPM, high lift cams, the helical gearing will cause the thrust bearing to wear rapidly. Straight cut gears do not generate this thrust.....a major point of wear is significantly reduced. Yes, they make more noise. But few of our engines are quiet anyhow....
Michael,
I have straight-cuts on a 2332, for all the reasons Jim just pointed out. The big-engine forces and stresses put loads on the camshaft that weren't imagined at the time of the original design of the cam gears. The straight-cut gears "supposedly" allow the camshaft to somewhat float back and forth in the end-play thrust tolerance. The standard gears tend to force the cam hard against one end of the bearings, causing accelerated wear on big engines.
Although the straight-cut gears reduce internal engine friction, they are not a horsepower trick as much as a wear reducing trick.
The gear whine on my car isn't that noticeable unless actually listening for it -- in which case it does sound kind of cool. Anyway, as Jim also said, the engines tend to be made intentionally "noisey" so the whine is not really an issue.
Mark
I have straight-cuts on a 2332, for all the reasons Jim just pointed out. The big-engine forces and stresses put loads on the camshaft that weren't imagined at the time of the original design of the cam gears. The straight-cut gears "supposedly" allow the camshaft to somewhat float back and forth in the end-play thrust tolerance. The standard gears tend to force the cam hard against one end of the bearings, causing accelerated wear on big engines.
Although the straight-cut gears reduce internal engine friction, they are not a horsepower trick as much as a wear reducing trick.
The gear whine on my car isn't that noticeable unless actually listening for it -- in which case it does sound kind of cool. Anyway, as Jim also said, the engines tend to be made intentionally "noisey" so the whine is not really an issue.
Mark
aaah..soo. THANK YOU GUYS FOR YOUR TIME AND INPUT .MIKE