Head Mod... Few Q's

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Just have to clear up the diesel referral glow plugs are used on some diesels and only to help heat the cylinders until they are above say 180 degrees then engine on its own for heat which it obtains from compression and ignition other diesels use block heaters that heat the water around the cylinders or fuel heaters which also prevent jelling or intake heaters that heat the oxygen going into the cylinders some inject ether or fuel into the intake before cylinder. i am interested in learning more about rechambering have no clue what it is lol.

I don't know where the diesel referral came from, but there is and interesting analogy with our squish heads and chambers. The glow-plugs are on pre-chamber diesels that have a little pocket chamber with the glow plug and injector inside. The fuel injects into this little pocket that burns in an overly rich manner inside this pocket. As the piston leaves the head, the overly rich flame front burns rapidly as it leaves the pocket and meets the residual air in the cylinder. A lot of turbulence is created and the burn rate varies with rpm giving the pre-chamber diesel more rpm range than the direct injection diesel, at least until they became electronically injected. It is that same squish and flow of air in and out of a chamber that creates a turbulence affecting burn rates and rpm ranges.

Interesting?

 

[wwholden]

I do want to say im running a vitos degree key and a head that has no flange at all. It has been shaved completely flush with the rest of the casting. I run the piss out of my bike and no problems so far.

 

[scotj77]

civic and i were just discussing that tonight.(shaved head on stock stroke blaster) basically you can do no wrong with a stock stroke. with the thickness of the headgasket and the distance from the top of the cylinder to the top of the piston at tdc you can't get the compression too high to detonate with 93 octaine

 

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I don't know about that.
Neil got some death rattle from his Blaster with the shaved and dropped stock head and cylinder.
But I have to admit other factors may have come into play too.
I cannot remember if he had the +4 advance and what for jetting and all.
Even dropping the cylinder base gasket has the effect of increasing cylinder pressure at lower rpms.

Ahhh, that is it, I get what you are saying. The piston is too far down the cylinder to get you in trouble plus the gasket thickness.
Right.

Kind makes it look like these engines were made for a 60mm stroke from the beginning,
just the stroke, the combustion chamber, the carb, the airbox all designed to save it from self destruction.

 

[scotj77]

yessir. exactly what i was getting at

 

[Triplecrown421]

civic and i were just discussing that tonight.(shaved head on stock stroke blaster) basically you can do no wrong with a stock stroke. with the thickness of the headgasket and the distance from the top of the cylinder to the top of the piston at tdc you can't get the compression too high to detonate with 93 octaine

this dos make sence, by sayin theres no way for the piston to hit the head on a stock stroke motor.
i do agree with all except "tdc you can't get the compression too high to detonate with 93 octaine"...... with a chambered head this may be true but i know from just removing 0.030 off the stock head you will run into detionation. only mod on the motor was an fmf pipe. under huge load and rpm predetionation was happening.