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Old 12-06-2009, 01:57 AM
Riding Rich Riding Rich is offline
Join Date: Aug 2009
Location: pa
Posts: 349
Default Re: Do slant heads really make a difference in power?

What i notice about the slant head is this.....
Th PK80 that i have with the slant has a dome shape piston.
The piston travels .145 inches above the top of the cylinder at TDC.
So it is inside the head.
Combination of the head and piston and stroke = higher compression.

The proper way to check the combustion volume is to put the piston at TDC.
Use a graduated dropper and fill the head with oil till it reaches the plug threads.
That's the volume.

I will say even milling down a std head on sandpaper and glass and replacing the gasket with a really thin one creates much higher compression.
And a huge power boost.
Also runs much hotter and harder on the bearings.

But i like it.
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