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Looks like it's already got a thin head gasket so no gains there.
I put the 8 degree timing advance on and put the intake and throttle linkage from the briggs and Stratton 208cc engine that was on the woodchipper.
Starts and runs great with 8 more degrees of timing.
The Kohler intake looks smaller, more restrictive because it has additional unnecessary 90 degrees bends. The Kohler intake was only bolted to the carburetor.
The B&S intake also bolts to the throttle linkage plate with a 3rd bolt.
With only 2 bolts the Kohler intake would vibrate independent of the rest of the engine.
Now the intake vibrates in unison with the engine.
Seems like only a matter of time before it would vibrate loose and allow dirt onto the engine.
Also modified a spring to turn the RPMs up to 4,000.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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