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PostPosted: Thu May 09, 2019 2:59 am 
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4 BBL ''Hyper-Pak''
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Joined: Mon Nov 16, 2015 8:41 am
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Location: New York
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As many have announced before, the K1-Wiseco forged rod and piston combination leaves an above deck height of about 0.010-0.015.

Using a fixed number for combustion chamber volume of 58cc that leaves us with:

10.18 CR using an aussie gasket (compressed to 0.040).
9.98 CR using a 0.050 copper gasket.

My machinist said I shouldn't expect to be able to take more than a CC out of each combustion chamber by blending. Any more would end up trenching around the valve seats, causing turbulence in the valve flow.

That would get me -0.15 CR. Hypothetically.

How do I get the rest of the way for a CR of 8.5-9.0?

I run meth injection.

Double copper gasket? One flat and one with a fire ring?

Any proven combos that don't leak? (For a bit at least lol)

-Greg

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PostPosted: Thu May 09, 2019 3:12 am 
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Joined: Mon Oct 21, 2002 11:08 am
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Location: Blacksburg, VA
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At one time, you could order copper gaskets that were as thick as about 0.120". That would about do it. Search for a company that can do that. Hussey and SCE are the two I remember. I have never used copper.

Lou

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PostPosted: Thu May 09, 2019 12:40 pm 
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4 BBL ''Hyper-Pak''
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Ooh baby!

Thank the lord Hussey makes one in 0.120!

Leaves me at a nice 8.8 CR.

That is if I can actually get it to seal...

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PostPosted: Sun May 12, 2019 2:34 am 
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TBI Slant 6
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Joined: Mon Feb 21, 2005 8:25 am
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Location: Buenos Aires - Argentina
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Hi. Why don't you just machine the top of the pistons down to get were you want your CR? I have never measure how beefy the Wiseco are on top, but beein made of 4016 if you have at least 4.5mm left you should be OK.

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1965 Valiant III Coronado Slant Six 6-Pack (soon!!)


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PostPosted: Fri Jun 07, 2019 7:08 am 
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Joined: Wed Oct 23, 2002 7:57 pm
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Location: Waynesboro, Pa.
Car Model: 65 Valiant 2Dr Post
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As many have announced before, the K1-Wiseco forged rod and piston combination leaves an above deck height of about 0.010-0.015.


Mine was .018-.020 in the hole not out if I remember correctly.

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