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-   -   Piston Compression heights (https://rennlist.com/forums/924-931-944-951-968-forum/845955-piston-compression-heights.html)

Lemons racer 11-26-2014 10:43 PM

Piston Compression heights
 
I need the compression height on a stock NA piston . I need this to calculate compression height on new stroker pistons. Also if someone has combustion chamber volume on a stock NA 8v head that would also help. Thanks

V2Rocket 11-27-2014 12:58 AM

should be 40mm.
chamber is ~56 cc IIRC?

Lemons racer 11-27-2014 08:14 PM

Thanks V2Rocket .Do you know the deck height on a 2.5 block its a 1988 NA block . Or could someone point me in the correct direction to find the number.

V2Rocket 11-27-2014 10:13 PM

230mm/9.055"
And actually the compression height should be a hair over 40mm

Deck is 230mm, rod is 150mm. Stroke is 78.9mm, 230-150-(78.9/2) =40.55mm if the pistons run flush to the deck.

Lemons racer 11-28-2014 12:40 AM

Thank you you saved me a lot of searching for the info I needed .


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