frodo84

iTrader: (11)

3.905 bore, pistons .010 out of the hole...ideally would use .050 gasket for .040 quench....but since compressed thickness stock would be .052 for .042 quench, does it make sense to pay big $$ for cometics or ICS titans or ? Opinions please....

brad8266

iTrader: (23)

1. Did you actually measure the piston height out of the hole or did you guesstimate?
2. Most people like to run areound a .035 quench area. .040 gaskets and the stock deck height is around .005-.006 give or take a slight bit.
3. if you are pulling the heads off anyway I would go with a thinner gasket.

frodo84

iTrader: (11)

Thanks for the input...

It's a new shortblock, so I'm sure about the distance out of the hole...I would rather not use cometics (leaks) but the .040 was recommended by LME. It's a question of how much difference would there really be using the stock (.052) gasket vs. a much more expensive alternative for possibly less chance of detonation.

ArcticZ28

iTrader: (14)

What's the application? That will greatly influence whether it's worth it or not.

pdd

iTrader: (3)

im at a .034 quench for the street .040 cometic and .006 out of the hole

ArcticZ28

iTrader: (14)

That's right where you wanna be.

speedracer5532

iTrader: (8)

My 402 was .011 out and I ran a .040 cometic with no problems at all. Your quench grows about .005 to .006 from a cold motor to a hot motor.

frodo84

iTrader: (11)

It will be a street car (C5) with (obviously) a 383, TEA 1.5 heads (3.950 chamber), long tubes, FAST 90/LS2 TB. I can get ICS titan gaskets in .043, that would put my quench at .033 or summit also sells Flatout gaskets, anybody use them? They are rubber coated copper...never heard of them but the part # is FOG-907954030 in .050 thick and 4.030 bore.

ArcticZ28

iTrader: (14)

I would run a .040 at the thinnest. Optimally, a .044-.046 would work best.

frodo84

iTrader: (11)

Looks like I am "in between" sizes...if I run .043 it's a little tight and .050 it's a little loose....

Thanks for the help.

ArcticZ28

iTrader: (14)

Yea, having the pistons .010 out is not helping. I'd say run the stock .052 and see how that goes. As long as you're not pushing for extreme amounts of hp with a lot of timing, you should be fine. The worst case scenario is you'd have to pull the heads again to put a thinner gasket on.