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Thread: Compression Question
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08-13-2017, 03:54 PM #1
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Compression Question
Hi All,
I have a 200 promax +.015 pistons and 33cc heads. Any idea what cranking compression should be?
Thanks,
CS
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08-13-2017, 07:03 PM #2
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Depends on which head gaskets, but I'd say about 150-155. My motors will get about 145 with 34cc heads and 1.0mm gaskets.....and old worn out rings lol.
'95 STV "The Blue Goose"
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08-13-2017, 07:33 PM #3
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What's your altitude , very important in this equation ...
JayJay @ JSRE
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Dave Strong liked this post
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08-14-2017, 10:16 AM #4
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900'
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08-14-2017, 10:49 AM #5
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Mine has 140psi with 35cc @ 3000' very safe with pump premium with no ethanol.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"
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08-15-2017, 10:38 PM #6
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Put a 1.2 gasket on it and you'll be fine on pump gas
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08-16-2017, 05:38 AM #7
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Is that a fish motor gasket ?
Originally Posted by 90 5.0
James H. W2F a V-King... Want 2 Fly a V-King
Dedicated Site for Hydrostreams >> http://hydrostreamforums.com/
My Project 1979 V-King restore >> http://hydrostreamforums.com/viewtopic.php?f=9&t=2761
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08-16-2017, 11:03 AM #8
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Yes Originally Posted by W2F a V-King
32cc and a 1.2 "fish motor gasket " on a 2.5 is right at 150, same as 34cc and a 1.0 or "promax/260 gasket"
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