pistons

[larrym]

Weisco has 2 different pistons available in stock stroke,
With a stock block height what sort of issues would I run into using 1.860 Comp Ht. over the stock 1.825.
This block is a low mileage NA 109 1987 cutlass I will have the block height measured before I order.
Found 9.522 as the stock height as a reference that would put them pretty much flush with the deck .002 below

 

[we4Mateo]

I thought you needed to be at least .035 in the hole with .040 preferred, but I'm sure someone more knowledgeable will chime in.

 

[Lil Truck]

Head gasket compressed thickness needs to be in the calculation. I believe .040 HG compressed @ 0 deck height is the minimum most run.

 

[Jerryl]

0.040" Cometics with sealant compress to right at 0.036/0.037". Pretty much the minimum squish.

 

[larrym]

so if depending on my block height with stock felpro gaskets .060 I should be good?
I want bump the compression a little bit on this motor with out decking the block or shaving the heads.
What are the pit falls running things this tight.

 

[David Husek]

Weisco has 2 different pistons available in stock stroke,
With a stock block height what sort of issues would I run into using 1.860 Comp Ht. over the stock 1.825.
This block is a low mileage NA 109 1987 cutlass I will have the block height measured before I order.
Found 9.522 as the stock height as a reference that would put them pretty much flush with the deck .002 below

I would use the PT040A2 with 1.825 comp height for your build. It is a much better choice over the PT120A2. The piston will be out of the hole with them after milling the deck.