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Author Topic: Minimum deck?  (Read 2965 times)
TexasTom
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12.58@106, 7.89@89 Texas Motorplex 10/18/09
« on: October 05, 2009, 23:18:01 pm »
What is the absolute minumum piston to head clearance you've successfully run?
I usually look for .040" as minimum, but considering the possibility of less for a limited time.

82 X 94, carrillo rods, compression in the 10.5-11:1 range.
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DKK Ted
DKK
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« Reply #1 on: October 06, 2009, 01:43:04 am »
I was told by a good source that no less than .040. I've ran a ZERO deck with a .040 copper head gasket with no problem on my 2303 a few years back.
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VW Classic 2012
Bruce
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« Reply #2 on: October 06, 2009, 04:36:18 am »
There's no one-size-fits-all for the minimum deck height you can run.  The min depends on many factors.  Stroke, rod journal, main journal, connecting rods, cylinders are all just a few of what determines how tight you can go.
A 69 stroke VW journal can take much tighter DH than an 84 stroke Chevy journal crank.
Using Pauter aluminium rods?  You'll never get away with 1mm of DH.
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TexasTom
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12.58@106, 7.89@89 Texas Motorplex 10/18/09
« Reply #3 on: October 06, 2009, 04:38:55 am »
Bruce,
I agree completely ...
The stroke is 82 (Okrasa) with Carrillo rods, 5.352". Wink
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Bruce
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« Reply #4 on: October 06, 2009, 04:43:44 am »
What are your journals?  Chevy?  VW? 
Mains: Type 1 or 4?
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TexasTom
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12.58@106, 7.89@89 Texas Motorplex 10/18/09
« Reply #5 on: October 06, 2009, 15:00:47 pm »
It has type 1 mains, Bruce.

Good components, but old school as they say; Okrasa, Berg, Fumio and the like.

Think I'll stick the .040" rule ...  Wink
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58vw
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« Reply #6 on: October 06, 2009, 22:55:10 pm »
new school tom new school....u know what im talking about..... Grin
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