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#1
09-29-2014, 09:29 PM
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Head gasket advice
Factory block with aluminum hats @ 13 to 1 compression. Should I go Copper with o ring or Cometics with less hassle for trouble free running.
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#2
09-29-2014, 09:44 PM
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GASKETS
Cometics...
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#3
09-29-2014, 10:06 PM
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I was hoping so. Anyone else?
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#4
09-29-2014, 10:19 PM
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The most important thing to the longevity of a head gasket under a aluminum head is the the heads deck be finished like a mirror so that the expansion and contraction forces do not shear the gasket up!
I have run the Fel pro 1016 gasket at 12 psi of blower boost with out issue !
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#5
09-29-2014, 10:21 PM
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I have ran felpro 1016s on a iron headed motor at 13 to one with no problem. Im not sure what the alum head changes in regards to the gasket.
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#6
09-29-2014, 10:29 PM
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Scott... MLS gaskets like the Cometics were developed to compensate for the movement difference relative to expansion/contraction rate differences between aluminum and iron.
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#7
09-29-2014, 10:37 PM
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My biggest fear is that because the factory block deck surface area is less than say a IA2 or Kauffman block that ringing it would likely be the only way to satisfactorily seal the head surface. I ve only heard stories of guys using the cometics with high boost and compression with no problems, never straight forward.
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#8
09-29-2014, 10:51 PM
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For the short time I had alum heads on my car 12.5 to 1 cr. I used cometics...but only because the chambers on the head were opened up larger than the bore size of the 1016s. That was a mistake by the head porter while working the chambers.
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#9
09-29-2014, 10:57 PM
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Been running Felpro 1016's for years sometimes reuse factory block,Edelbrock heads
14 to 1 compression with no failures. This might be a 3rd option http://scegaskets.com/shop/ |
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#10
09-30-2014, 12:24 AM
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At 13-1 CR I think (IMO) Cometics are overkill. I ran the Butler head gaskets on my 13.25 motor without issues...
Not saying that Cometics wouldn't work. As far a mirror finish...they are now saying to use Copper Coat spray ??
__________________
 ECM member. 2008 Outlaw Pontiac Drag Series Champion MANDRA Do it now fool! Life is short. 69 Grand Prix/3163lbs / IAII 535 w/ Tiger heads by Gaydosh....9.35@ 144 so far..  through mufflers. 1.26 60'. Going back to track with pump gas engine.... My 60 Ventura retired to street/strip duty.. |
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