Quench and gasket size
Quench and gasket size So we are trying to obtain an ideal quench distance, but our question is what thickness gasket should we use. With our calculations it seems like we would have to use a really thin gasket such as .020, but is that too thin for such a build? We are also planning on supercharging this build.
4.127" Bore
4.0" Stroke
6.125"Rod Length
68CC Combustion chamber
.030" Piston to Deck (in hole)
-25CC dished pistons
44 ADV intake close angle
228 ADV intake duration
240 ADV exhaust duration
114 lobe separation
110 intake lobe centerline
Also, would like to keep compression around 9.5:1
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4.127" Bore
4.0" Stroke
6.125"Rod Length
68CC Combustion chamber
.030" Piston to Deck (in hole)
-25CC dished pistons
44 ADV intake close angle
228 ADV intake duration
240 ADV exhaust duration
114 lobe separation
110 intake lobe centerline
Also, would like to keep compression around 9.5:1
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TECH Junkie
Joined: Dec 2005
Posts: 3,092
Likes: 11
If you are supercharging does it make that much difference what the quench is? I mean if it turns out to be .060" does that make much of a difference as long as the static compression ratio is where you want it.
I think getting the static compresssion ratio where you want it is more important. Also I would think you would want a very good quality head gasket.
I think getting the static compresssion ratio where you want it is more important. Also I would think you would want a very good quality head gasket.
Last edited by 1989GTA; Nov 13, 2008 at 11:05 PM.
thanks for the response GTA. What do u think the minimum gasket size I can get away with? It's recommended that u should not go less than .029" but not sure if that applies to supercharged... Your thoughts?
I've read that test at MIT showed that as compression ratio increases, the effects of quench become less detrimental to combustion. I bet that goes for the much denser charge of a supercharged application as well.
The .030" was measured. The block was not decked but only cleaned up .003".
Sounds like keeping SCR/DCR lower is more a important factor in controlling detonation in a forced induction motor than quench will ever be.
Sounds like keeping SCR/DCR lower is more a important factor in controlling detonation in a forced induction motor than quench will ever be.
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