
04-17-2009, 02:28 PM
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Registered User
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Join Date: Feb 2009
Location: orlando
Posts: 204
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Quote: Originally Posted by techinspector1 My advice would be not to go picking a cam grind out of thin air until you have measured and computed the exact static compression ratio of the motor and computed the dynamic compression ratio with the intake closing point of the cam chosen.
Further, and I may take some heat for this, but I wouldn't use an extreme energy camshaft. In my opinion, easing up on the lifter rise rate a little with a gentler lobe profile will make the lifter happier. When cams go south, it's the lifter that goes first and then takes out the lobe. If you need more cam, then coordinate the static compression ratio with it and bolt in more cam, but don't ask more from the cam/lifters with an extreme rate of rise than is geometrically sound, again, in my opinion.
I would also take this opportunity to nail down the squish. Measure the stack of parts and the block deck height and find out what the piston deck height will be. From there, you can choose the correct gasket thickness to set the squish. If the block needs to be decked to get the squish right, then deck it. Do it right this time.
Is it possible that you could share the origin of this motor with those of us on the board so that nobody else here will get burned? |
i agree, your already against enough odds with a flat tappet cam, with today's oil formulas. i stay away frome, "extreme, black magic, post modern flat tappet grinds. the ramps are too aggresive, based on my experience.
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