Light Weight Crankshafts
#8
You end up with more HP at the flywheel, because less HP is consumed in acceleratiing the mass of the rotating assembly. How much HP you gain on a dyno will depend on the engine rev rate, in RPM/sec.
#9
I am actually looking at a 3.750 crank from Ohio Crankshaft, weighs 44 lbs. and about $550 I believe.. Thats less weight for a little under the price of the 52 lb eagle or scat.. I still have the Eagle H-Beams that weigh 630g, so dunno if it will do me any good? Any opinions?
#10
I am actually looking at a 3.750 crank from Ohio Crankshaft, weighs 44 lbs. and about $550 I believe.. Thats less weight for a little under the price of the 52 lb eagle or scat.. I still have the Eagle H-Beams that weigh 630g, so dunno if it will do me any good? Any opinions?
Run far and fast. Those ohio cranks are all over the friggen place on tolorences last time I saw somebody try to use one it woulda cost 3x what he paid to actually get it in shape for use.
You wont notice a lighter crank unless you're road racing and matching revs is really important. In that case a light crank and flywheel is where its at you can get the engine where you need it a bit faster than the heavy crank.
The only other thing is, the energy your crank soaks up instead of sending it to the drive wheels is put back into the car at a different time. The inertia is given back to the car when you shift and the engine speed slows down... thats the surge of speed or the little bump you get during a shift at wot or anytime really.
If the price difference of the light stuff is insignificant then by all means go for it. If its going to cost more my opinion on that is, every dollar you put into the heads is worth three dollars anywhere else.
I would not lose sleep over my crank being 10lbs heavier than it coulda been. Also keep your eye on the target bobwieghts of the cranks you're thinkig of buying.
#14
Rich, I hate to disagree with you but they are great to work with. I've had them "correct" several cranks supplied by thier competitors (Eagle especially, scat, and etc) and for very reasonable costs.
I've bought cranks from them and if they had any run-out or straightness issues they gladly corrected the problems, no questions asked.
I've bought cranks from them and if they had any run-out or straightness issues they gladly corrected the problems, no questions asked.
#15
Rich, I hate to disagree with you but they are great to work with. I've had them "correct" several cranks supplied by thier competitors (Eagle especially, scat, and etc) and for very reasonable costs.
I've bought cranks from them and if they had any run-out or straightness issues they gladly corrected the problems, no questions asked.
I've bought cranks from them and if they had any run-out or straightness issues they gladly corrected the problems, no questions asked.
Rich