Did I buy the wrong pistons?
 

I posted a thread last year but Wiseco seems to have updated their catalog and changed specs on these pistons. I have yet to start my motor build due to time.
Specs:
2.4l block
Manley 150mm h beams
Stock 2.4 crank

Pistons are k656m87
https://fbcdn-sphotos-f-a.akamaihd.n...ab0583bdd68238


Wiseco Spec sheet. Some of these numbers seem off only for those pistons. And google searching shows sellars of these pistons but no one actually using them.
https://fbcdn-sphotos-h-a.akamaihd.n...316c9bb38f2cbd

Those are wrong. You will be at 14.25:1 compression.

You should get the K626M87. However, the original spec sheet is wrong. Compression will be around 10.6:1 using a stock head gasket with those pistons and evo 8/9 head.

I am running the JE proseal thick gasket to bring compression down to 10:1 and I have some combustion chamber work done that lowers it a little more.

Also, Do yourself a favor and get some I beams. Those H beams are slightly stronger than stock.

Don't mean to thread jack....i also need some answers on this.
This is what i got on RSR Static Compression Ratio Calculator. Im using Wiseco K627M855AP. It doesn't look right to me at all.
Im looking for 10.0:1 CR since I plan on running pump 90% of the time and E85 10% of the time.
The Wiseco Info Sheet shows the pistons being 9.15:1 so do i need thinner or thicker hear gasket? What size?
Any help would be awesome, Thanks everyone in advance.

This is what i plan on running.
2.0 block
Manley "TT" Billet Crank 100mm
Manley "TT" I-Beam Rods 150mm
Cosworth Size 1 Rod & Main Bearings
Cosworth Thrust Bearing
Cosworth 1.3mm head gasket.

bump

any trolls willing to help with this.....lol...thanx

Probably not gonna see light on this.

You entered a negative number in the deck clearance. You only enter a negative number if the piston comes up past the deck height. In this case, the piston is .3 into the block. Hope that makes sense.

Static Compression Ratio: 8.84

Deck Height

Move piston to TDC, and measure the distance between the flat top surface of the piston (not the top of a dome or the bottom of a valve relief) and the top of the cylinder. Enter a negative number if the piston's flat surface sticks up past the top of the cylinder. At TDC the piston will "rock" so be careful in your measurements. ORCAs are .035".