[f16fxr4real]

Not knowing how to figure this out after searching the internet.....to many variables for me. :turn: Any ideas what my compression has changed to?
Block - casting # 10066036 2 piece rear main seal 4 bolt main
Crankshaft- part # 3932444 Nodular Iron 1985 and older flywheel bolt pattern
Connecting rods- Part # 10108688 Powdered Metal
Pistons- part#12514101 Cast Aluminum
Heads were Cylinder Heads- casting #33417369
1.94" Intake valve , 1.50" Exhaust Valve 76cc Combustion Chamber
New heads 12558060 (062 castings) with 2.02/1.60 and 64 cc chambers
Also, should there be any problems with running a thinner gasket since Im using those stock pistons?

 

[luke'snova]

ball park

12514101 350 9.1:1 64 cc standard pressed 350-cid 300 HP & 330 HP service engine with "SP" ID

 

[f16fxr4real]

See thats why this site is great

I should have thought of that. Now, I wonder what it WAS. I had found some site awhile ago that would do the math for you with whatever you put in for parameters but cant find it now.
And I wonder what I can get out of this with the larger valves and the right cam. thinking 3.08 or 3.36 gears with a stock converter 25.5-26 inch tall tires. 350 trans, probably 2004r in a few months. Edelbrock Air Gap and street avenger 670, hedman full length headers, 2.5 inch exhaust

 

[bowtie0069]

I had found some site awhile ago that would do the math for you with whatever you put in for parameters but cant find it now

http://kb-silvolite.com/calc.php?action=comp

 

[D-Man]

Also, should there be any problems with running a thinner gasket since Im using those stock pistons?

You need to measure your deck height (or how much the pistons are "In the hole"). Then you'll be able to pick a head gasket with the correct thickness to get the quench you want. :yes:

The crudest way would be to use a machinist's straight-edge and a set of feeler gauges. It will put you in the ball park. The most accurate way would be with a deck bridge and a dial indicator.
For example, if the pistons are sitting in the hole .012" and you want .038" quench (piston-to-cylinder head clearance) then you'd need to get a head gasket .026" thick. I know Cometic sells them .027" thick but you get the idea.

Most people shoot for .035"-to-.045" quench distance. For your app, I'd shoot for .038"-to-.040" (I don't like PM rods:no: and thus, don't trust them.)..