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Author Topic:   High compression ratio problems??
posted November 12, 2004 10:05 PM
Hey I was wondering if its good or bad to have a higher compression ratio like 13:1 and so forth....I have heard it creates this true?

posted November 13, 2004 06:04 AM
It will sure expose any weak links. questionable parts or bad practices. add in RPM to make sure its either very good or paperweights.
13 to 1 isn't really that high, I seen some ratios that would flat scare ya when I was with the outlaws on forbrooks car. 16.5..17...17.5...etc.. but thats why they get ran 5 to 8 nights tops.

posted November 16, 2004 07:33 AM
If you run race gas 13:1 is fine and reliable. you can run it higher, but like goinrcn44h said above, you start finding the weak links.

if you run alcohol you can (and should) get the compression "way on up yonder"!

but no engine will live with high compression if the rings and guides aren't sealed up because oil in the combustion chamber will detonate any racing engine to certain death....especially one with a high compression ratio. JMHO.

Mark's Racing Engines