Big Mike
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« on: February 24, 2012, 09:52:29 PM » |
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What is a good starting point on shaving a oppys heads?
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PitGuy
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« Reply #1 on: February 24, 2012, 09:53:10 PM » |
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none
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Woo Flag man
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birdman_express
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« Reply #2 on: February 24, 2012, 09:54:54 PM » |
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Only clean them up if they are warped.
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Marc Baker
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heymow.com - Lawn Mower Racing Forum
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« Reply #2 on: February 24, 2012, 09:54:54 PM » |
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saltyAMF
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« Reply #3 on: February 24, 2012, 09:57:55 PM » |
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u want to effectifly lower static compression. not raise it
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joshua "MEAT" coleman
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PitGuy
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« Reply #4 on: February 24, 2012, 09:58:27 PM » |
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make them flow better to get the best out of them
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Woo Flag man
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Jim Knutson
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« Reply #5 on: February 24, 2012, 10:04:55 PM » |
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Some early model 40 cube heads were "taller" with about a .020 raised "lip" around the whole perimeter of the head. Along with a thick copper head gasket, you can run a small amount of pop-out (.010) to help compression after relieving the area between the valves and the cylinder bore, which will improve flow.
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Jim Knutson
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BIG AL 202
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« Reply #6 on: February 25, 2012, 07:08:42 AM » |
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Are you making your own copper hear gasket? I don't know that anyone was making them. If so who, please?
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I MY BE FAT AND SLOW BUT JUST WATCH ME GO! ALWAYS HAVE FUN! I RUN WITH THE ITHACA DIRT DEVILS
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Jim Knutson
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« Reply #7 on: February 25, 2012, 08:51:43 AM » |
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Just source the old style non graphoil head gaskets( no longer made) and use them, or trace the original onto some copper of your preferred thickness... .020 to .030 is sufficient.
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Jim Knutson
2009 o.l.m.r.a. mod-x points champion
2010 o.l.m.r.a. mod-x points champion
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2012 MHLMR FX champion
mount hood lawnmower racing
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Big Mike
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« Reply #8 on: February 25, 2012, 11:59:20 AM » |
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Just source the old style non graphoil head gaskets( no longer made) and use them, or trace the original onto some copper of your preferred thickness... .020 to .030 is sufficient.
thx |
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BIG AL 202
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« Reply #9 on: February 27, 2012, 11:53:13 AM » |
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Just source the old style non graphoil head gaskets( no longer made) and use them, or trace the original onto some copper of your preferred thickness... .020 to .030 is sufficient.
OK COOL, THANKS |
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I MY BE FAT AND SLOW BUT JUST WATCH ME GO! ALWAYS HAVE FUN! I RUN WITH THE ITHACA DIRT DEVILS
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