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Compression ratio for VN on straight gas.

colmiller

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If I am going to run gas only I should be able to take advantage of the increased octane rating of LPG.
Does any one have any suggestions about a sensible CR to shoot for ?
 

Boonz

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have a chat to greenfoam about this he is pretty keen on straight gas conversions and specs and stuff
 

chook231

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Hey mate, remember, dont go too crazy on the c/r, b'cos the power you loose with a lower c/r you more than make it back with advanced timing, it all depends on your cam really - the main thing is to acheive a c/r to suit the cam and then work on the tune from there.
good luck , let us know how you go it.

GRA setup i take it ?
 
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colmiller

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Yes GRA.

I've been playing with the idea of making up a twin throttle body to go with it either progressive throttles or sync'd.

Pity GRA no longer market cams. Anybody know why ?
 
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