Im a noob, got a couple of questions (compression)

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Plooster
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Im a noob, got a couple of questions (compression)

Post by Plooster »

I am looking into shaving my head for more compression. I know that stock compression is 120psi. What is the highest compression i can get without ruining my engine or going past 93 octane gas? Also do Sprees have reeds or no?
I have a 1986 red Honda Spree
mods: uni prefilter, two 3/8 inch holes drilled in airbox lid, drilled jet out from .026 to .0292.

I also have a 1999 Yamaha Blaster
stock except Graydon Proline Nerfs Holeshot tires and aluminum rims.
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vette76
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Post by vette76 »

stock compression is around 114psi. from shaving the head you wont really get enough compression to do any damage. and yes sprees have reeds.
00' sa-50 slammed and stretched
89' elite sb, with a 99' af16, (SOLD)
87' spree (SOLD
87' mustang gt vert kenne bell, irs.
90' mustang notch turbo drag car
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noiseguy
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Post by noiseguy »

If you can get to 160 PSI (about 9:1) by shaving the stock head I'd be seriously impressed.
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