Question about quench w/supercharging. David? Anybody?

[allend43]

I have tried other forums and nobody seems to know anything about this subject. I remember somewhere on one of those forums, somebody said, when your supercharging an engine, you don't want tight quench, you want the piston as far away from the head as possible. I am building a Dart 400, 6 inch rod, -36 dish J & E blower pistons, AFR 220's, with a Procharger F-2. Should I 0 deck the block or not? I have had the pistons thermal barrier coated if it makes a difference. I so wish I could ask Mr Vizard, but anybody else knowledgable in this area?

[Bobhatton]

Just do the same thing you would with a N/A engine. You still need to build an engine the same way even if it has a supercharger.
Quench is very important and you do not want any change left in that area so get it down to 0.

Bob

[j_cizzo]

piston as far away from the head as possible? that guy has no clue.. quench is still really important to stave of detonation, but you just gotta go about getting it while still lowering your static compression (depending upon what it already is).

if it's possible, keep the combustion chamber in the head relatively small, and instead of using a flat-top or domed piston like in an N/A application, use a dished piston where the dish matches up with the combustion chamber, that way you'll drop the compression, and still attain the swirl and squish you want to help with turbulance.

Also, having a dish, gives the expanding gasses direction. They'll expand towards the center and into the piston to push it down.

[GLHS60]

I have tried other forums and nobody seems to know anything about this subject. I remember somewhere on one of those forums, somebody said, when your supercharging an engine, you don't want tight quench, you want the piston as far away from the head as possible. I am building a Dart 400, 6 inch rod, -36 dish J & E blower pistons, AFR 220's, with a Procharger F-2. Should I 0 deck the block or not? I have had the pistons thermal barrier coated if it makes a difference. I so wish I could ask Mr Vizard, but anybody else knowledgable in this area?

Check this out:
Thanks
Randy
http://www.enginebuildermag.com/Arti...orsepower.aspx

[HPaddict]

i believe quench on a blown motor is not quite as critical, i work on anywhere from 0 to .020 down the bore not as much as some guys like say steve morris but still down the bore none the less. i dont know it just works