my slant buildup

Killer6 said

My .060 over block was decked to .130" over the pistons, the head was cut .055", & using a Print-o-seal gasket it cc'd at 9.47:1 with the carbon, 9.35:1 after I cleaned everything. If You want to run that #819 OCG cam, this # is going to serve the torque below 2800 well. Or You can buy a converter that stalls at 2600+ & You're golden. The 2106R is a better torque cam, it will make a higher peak #, but less hp 3.5k & up. If You bump the CR to 9.5 You gain back 80% of the tq deficit to the 2106R, & match it at 3k. Peak would be just a tick higher as well.
Those were modeled with the same head, 8.8:1, int/exh systems.

Click to expand...

Geez guy.....I gotta question your numbers and math. Here's mine. Pistons in the hole at TDC .175". Block not decked. Head milled .155". Measured static dead nuts on 10:1. And yours has had .130" knocked off the block and .055" off the head and you're only at 9.47? I ain't buyin it. You're math is off somewhere. I'm running a cam with 250@ .050 duration ground on a 108 LSA with a 70 degree intake closing event and STILL have 175 PSI cranking pressure. I really think you need to recalculate. Either you've not removed as much material as you think, OR somehow you've mis calculated.....or both. You're probably closer to 12:1 if you really have that much material removed. I know mine is right from not only measuring countless times, but from the cylinder pressure and from the fight I just won with detonation.

I'm not trying to argue.....just strongly suggesting you recalculate everything. ....unless maybe you're running a dished piston.