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Discussion Starter · #1 ·
I have some questions concerning compression....

I am planning on matching up a N42 head with a non-turbo
F54 block. I have been told by some reliable sources that the
CR won't be too high to run on Pump Gas. I have seen Bryan
Little's page on CR, and it leads me to believe that CR would
end up being to high.

If anyone has any information or experience with this setup,
Please feel free to contact me at ( [email protected] )
 

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that setup is done all the time and is probably the best combo for power when comparing unmodified stock heads and blocks. The Flattop motor gives good compression as well as the N-42. Although it does not give as high a compression ratio as the E-31 or E-88, the larger valves on the N-42 outweigh the loses of compression in terms of hp by a long shot.
 
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