Purple Haze
Active Member
I think that hi-compression head blew out the seals. The stock seals are notorious for failing, even with stock compression.
after 30-45 minutes I lose torque and speed?
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butre
Well-Known Member
does cylinder compression do anything to crankcase compression?
piecepatrol99
Member
sure I guess that's a possibility though im thinking it has to do with the quality of engine that it becomes fatigued, if that makes sense
I'm a recent victim of 'snake bite'.
Last week I pulled the shut off valve from my new tank to apply more teflon tape and seal a leak I've been chasing for a month. I was surprized at how much garbage was in the tank and now attatched to the filter on the valve/in the tank.
I believe I didn't think to say this before because the filter wasn't obstructed enough to starve the motor.
piecepatrol99
Member
Good question. Might be better answered by some one else but I'll give it a go...
Cylinder compression should not directly affect the crankcase. The rings on the piston should seal the combustion chamber isolating it from the crankcase.
Compression in the case should be 'cause' by the the motion of the pistion and controlled by the integrity of the rings, bearings and gaskets on/in the crank case.
Fabian
Well-Known Member
I agree with your logic.
Fabian
Well-Known Member
I agree.
In 5+ years i have only had one (1) crankcase seal blow out.
My experience has shown them to be surprisingly reliable.
piecepatrol99
Member
The only instance I can think of where cyllinder compression would affect the crank case is changing the crank it self and/or the piston arm or modifying the cyllinder body and piston for more volume/higher compression.
But that's getting in to modifying the motor...so yeah everything is going to get thrown off...
Stock motor with no more than upgraded parts should not affect crank case compression.
butre
Well-Known Member
that's what I was thinking, I can't think of any reason for cylinder compression and crankcase compression to correlate in any way, other than possibly changing cylinder compression by increasing the stroke
piecepatrol99
Member
2 stroke and 4 stroke are basically constructed the same in that the crank case and combustion chamber are only separated by the piston rings.
the 4 stroke differs in that the crank is bathed in oil.
that being said, why would there be compression in a 2 stroke crank case? isn't the crank case supposed to be a vacuum?
the 4 stroke differs in that the crank is bathed in oil.
that being said, why would there be compression in a 2 stroke crank case? isn't the crank case supposed to be a vacuum?
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