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Author Topic:   High rev motors?
posted January 02, 2004 06:56 PM
I read about high revving mills-I have a question or two>>If you are running in a division that restricts intake or exhaust (manifolds) would you be better off turning less rpm?
If you decide to really twist a motor, would you want a wider lobe separation on the cam?

posted January 02, 2004 07:46 PM
A motor that has bigger intake ports generally will like the higher rpms... not to say small ports do not either. if the restriction on intake and exhaust are very limiting, then i'd say keep the rpm's down and look for torque...
on the lobe separation, ih ave no clue i'd have to think about it...

[This message has been edited by Wallydog9g (edited January 02, 2004).]

dan ferry
posted January 02, 2004 10:15 PM
if ur restricted to cast intake and exhaust manifolds youd be better off keeping rpms below 6000 in my opinion. lbe separation like 106 puts the peak power lower in the power band than 112. 112 puts peak near the end of the powerband. if u have a cam thats range is 2500-5800 a 106 may put peak at 4000 and a 112 at 5500. just my opinion.

rico 08
posted January 03, 2004 07:54 AM
The wider lobes also will make the powerband real wide,it does hurt a little off the corner where a narrow lobe sep cam will have more bottom end but be more of a peaky powerband.

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