Custom Head Gasket...where can I get it made?

[Crucible]

So quench and squish are the same thing?
And the whole thing is you want your piston crowns to be as close as possible to the head? So instead of thicker head gaskets bigger depressions are more effective?



This all correct?

Yes quench and squish, same thing, and yes the closer your pistons are to the "squish band" at tdc the more effective it is.

When I was suggesting "mirror pistons" I was meaning the flat parts of the squish band will be indentical to the piston crown - ie mirrored.

This allows the fuel/air mixed to be slammed into the centre of the combustion chamber mixing it up and completing combustion faster.

If you use a thicker headgasket you are decreasing the comp ratio but also decreasing the quench efficiency, so you are actually increasing the chance of detonation.

the correct way is having the scallop in the piston centre to get the desired comp ratio but also have the piston outer edge mirrored to the squish bands, that way lower comp ratio and good quench.

[Bazda]

So quench and squish are the same thing?
And the whole thing is you want your piston crowns to be as close as possible to the head? So instead of thicker head gaskets bigger depressions are more effective?



This all correct?

Yes quench and squish, same thing, and yes the closer your pistons are to the "squish band" at tdc the more effective it is.

When I was suggesting "mirror pistons" I was meaning the flat parts of the squish band will be indentical to the piston crown - ie mirrored.

This allows the fuel/air mixed to be slammed into the centre of the combustion chamber mixing it up and completing combustion faster.

If you use a thicker headgasket you are decreasing the comp ratio but also decreasing the quench efficiency, so you are actually increasing the chance of detonation.

the correct way is having the scallop in the piston centre to get the desired comp ratio but also have the piston outer edge mirrored to the squish bands, that way lower comp ratio and good quench.

well put
oh about the mirroring, I always thought that its the mirror of the combustion chamber. So you add that onto the piston, bascailly used in n/a applications and mostly V8's

[Crucible]

well put
oh about the mirroring, I always thought that its the mirror of the combustion chamber. So you add that onto the piston, bascailly used in n/a applications and mostly V8's

yeah thats how I understand it also.

So if you have a combustion chamber and piston lying side by side the piston crown and chamber look identical.

like the pic at the top of this link

http://www.chevyhiperformance.com/techa ... to_08.html

[Bazda]

for what we are doing we dont want that, we want a dome on the piston.

For n/a applications its different.

[Crucible]

for what we are doing we dont want that, we want a dome on the piston.

For n/a applications its different.

huh?......ok

so what your saying is that for forced induction the piston will be differant again??

I thought as long as you have the desired compression ratio and good quench it would be acceptable n/a or turboed.

what were you meaning by dome on the piston??? I mean its obvious what the a domed piston looks like but how does that affect performance between forced ind and n/a??

swirl on intake and compression????

interesting!

[Bazda]

to much to explain , lets just leave it there.
pop tops for n/a application for more compression and better a better burn and opposite for turbo due to compression reasons.