Hi all, I am not the best with math and have my brain almost cooked trying to figure out the right thickness head gaskets to achieve close to .040 quench. My engine is as follows: 3.25 stroke. 4.030 bore. Block has been decked .015. Piston compression height is 1.671. I mulled over it a while back and I 'think' that with a .020 steel shim gasket my quench would be .037, which would be close. Sorry if this might seem a dumb question, I just don't want to order the wrong stuff.
You need to know your current deck height. Surfacing .015 doesnt mean anything unless you knew what the deck was previously. So measure from the deck, to top of pistons, with each at top dead center. Record all 8. Take the lowest number of those measurements and subtract it from .040, and there is the gasket thickness needed. Sent from my SM-G900V using Tapatalk
The block was stock undecked before I sent it to the machine shop if that makes a difference. The depth micrometer doesn't seem like a pricey tool so it couldn't hurt for me to buy one.
Factory blocks are normally 9.025" so a cut of 0.015 would yield 9.010" With stock rods , a 1.625 crank throw and your 1.671" comp ht pistons would leave it 0.014 below deck. A Fel-pro 1142026 gasket with 0.026 thickness would yield a 0.040" quench [minimum] It all depends on piston CC and head CC as to the desired end result.
2 Find TDC put on a metal plate across using 2 head bolts but the Piston up against the metal plate marked the dampener rotated the other direction till butts up against the plate marked Market halfway in between its TDC Sent from my SM-J737T using The H.A.M.B. mobile app
Do not trust that the block is the same as "others".....measure it and do it right. The shop cut 015 off....why....to clean it up or to attempt a zero deck....best bet is always measure and go from there.
The former Victor-Reinz, now Mahle Original/Clevite #5746 is another .026" thick, 4.125" bore gasket. Stainless steel armor and graphite composite construction.
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