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Location:
Brisbane
Registered:
May 2002
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Re: What compression is safe for boost??
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Tue, 21 January 2003 01:06
 
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There are many factors which influence the maximum "safe" compression ratio for use with forced induction. The combustion chamber design, the material used to construct the cylinder head, even the position of the spark plug can have an influence. In other words, there is no magic formula you can apply to determine the best compression ratio; it varies for every type of engine.
People in the US are running small amounts of boost through Honda S2000 engines (with a static CR of over 11:1), while on the other end of the scale a Holden 202 probably wouldn't cope with any more than 8:1 compression for even moderate amounts of boost.
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