swirl dome head for a 650 kawasaki ,..how much compression ?

[cavemanX2650]

surely somebody has to know ,....

[Bar Tab]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

It looks like they made two form the Ocean Pro 1991 Orderbook.

Pro 650 AVX Aluminum Head Race Gas- EP105
Domes shaped for race fuel
Designed for high compression motors
Dyno and race proven
27% more cooling volume
3 cooling line bosses
Additional mass above domes
Domes recessed .040
Mill up to .040 without recutting domes.

Pro 650 AVX Aluminum Head- EP100 Pump Gas Domes
Domes shaped for 95 octane or lower
Horsepower gain throughout powerband
Dyno and race proven
27% more cooling volume
3 cooling line bosses
Additional mass above domes
Domes recessed .040
Mill up to .040 without recutting domes.

Not sure that this is much help

[cavemanX2650]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

it gives me a starting point !! thanks

[anthony]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

185 psi I was told with a stock gaskette

[cavemanX2650]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

185 psi I was told with a stock gaskette

LOL j/k

[motoman96]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

Cavey, that head will put you around 318psi, just run pump gas an hold it WFO as long as you can.lol

[cavemanX2650]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

Cavey, that head will put you around 318psi, just run pump gas an hold it WFO as long as you can.lol

sounds great M&M , ill try it out in the morning and post back with my results

[bellamy24]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

Hey Caveman, did you ever end up using this head? I came across this thread and have the same head on my ski where it makes 210/215psi.

[rhugo21]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

I bought this from caveman about a month ago....does it really make 210 psi? What kind of head gasket are you using?

[bellamy24]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

These readings were taken on 4/28/2010 that I found in my phone and are actually higher than 210. They may have been taken before the ski was actually run so they may not be as accurate as the consistent 210/215 I've been getting since running it. Not sure about the head gasket, is there an easy way to tell? This engine was built by a shop in upstate SC I was told when I bought it so unsure of all the specs other than the .5 overbore and new top and bottom. I put it into a ski I built and ran it for the first time. I'm halfway expecting it to blow up or melt every time I ride it.

[timothy]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

1ok

[timothy]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

F'n helmet hope they got some lightweight more compact 1's now.

[blown]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

Pro 650 AVX Aluminum Head Race Gas- EP105
Domes shaped for race fuel
Designed for high compression motors
Dyno and race proven
27% more cooling volume
3 cooling line bosses
Additional mass above domes
Domes recessed .040
Mill up to .040 without recutting domes.

Pro 650 AVX Aluminum Head- EP100 Pump Gas Domes
Domes shaped for 95 octane or lower
Horsepower gain throughout powerband
Dyno and race proven
27% more cooling volume
3 cooling line bosses
Additional mass above domes
Domes recessed .040
Mill up to .040 without recutting domes.

So is this the race fuel head or pump gas?

[jeff 650sx]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

So is this the race fuel head or pump gas?

Based on the guy who got 210/215 psi it is definitely a race fuel head. Unless you can find a thick head gasket. A rough estimate for psi change is 1 psi for every .001" added through the head gasket

[jdpilot]

Re: swirl dome head for a 650 kawasaki ,..how much compression ?

It looks like they made two form the Ocean Pro 1991 Orderbook.

Pro 650 AVX Aluminum Head Race Gas- EP105
Domes shaped for race fuel
Designed for high compression motors
Dyno and race proven
27% more cooling volume
3 cooling line bosses
Additional mass above domes
Domes recessed .040
Mill up to .040 without recutting domes.

Pro 650 AVX Aluminum Head- EP100 Pump Gas Domes
Domes shaped for 95 octane or lower
Horsepower gain throughout powerband
Dyno and race proven
27% more cooling volume
3 cooling line bosses
Additional mass above domes
Domes recessed .040
Mill up to .040 without recutting domes.

Not sure that this is much help

Can you scan and post the pages from the ocean pro order book?