thebufenator

I need some help choosing a head gasket now for my 383.
Original thread here compression questions

4.03 bore
3.75 stroke
56cc chambers
5cc dish pistons

non-decked block, I know I should have had the block zero decked now,
but owell.

I have heard the average to be about -.025 in the hole.
The heads have also been milled .002, I assume that means I take .002
off of the quench....

The gasket set I have now are they .029 Impala set.
Using those I will have about 11.87:1 compression with a ptv ~.052

using the Mr Gasket .026, I will have 11.97:1 with a ptv of ~.049

Neither of those have the best ptv really.

Now, I heard I can use SBC gaskets, but I will have to open some of the holes.....is this possible?

If it is, I can use either an SCE or Felpro .015 gasket.
That would give me 12.35:1 with a ptv of ~ .038


I really like the last idea....but not sure if it will work.
I have not yet picked a cam yet.....but its a daily driver, and I like to get on the gas I dont want to spin past 6500rpm though.

thoughts?

thebufenator

so..........no input at all?
Is my thread title not catchy enough?

96capricemgr

ptv clearance is not calculated like that. milling the heads does not affect quench.

Need to go back to the begining and get a better understanding of what these terms are.

thebufenator

I wasn't sure about the heads being milled or not.....

I will measure how far in the hole my pistons are today when I get home.

What else did I mess up?

1racerdude

You need more P/V clearance.
Your cam will determine the static compression ya can run.

thebufenator

is .038 too close?
I dont plan on spinner any higher then 6500....

I know there are some .016 gaskets to get .039...

1racerdude

For quench that is about right. For P/V that is way to close.

speed_demon24

Do realize he isn't calculating PTV the correct way?

1racerdude

Well I figured there is only ONE way to do it and .038 is to close.

speed_demon24

He's assuming that the quench is the same thing as PTV.

1racerdude

OOOOOPPPPSSSS wrong answer. He will find out when a hole appears in a piston.

thebufenator

what is the difference?

I did alot of searching.......I read alot but not so much on definition of what each is...