is 200 psi too much on a 440 engine

[holeshot19]

just got my engine back together and ran some heat cycles and im geting 200 psi on a compresson gague is that too much. 440 ex

[holeshot19]

come on now some one knows

[skemp]

What kind of piston is it in terms of compression? Did you cut the deck height at all? That is pretty high, but it is probably ok. Give some more information, then it will be easier to tell you. :)

[holeshot19]

je 11.1 piston with cometic steel head gasket and no base gasket with honda bond. they decked the cly but dont think it was much.

[skemp]

Well, sounds ok to me. You will almost positively have to run race fuel though. You could try a mix, and check for pre-ignition. It should be alright with race fuel. Good luck man. :D

[holeshot19]

???????????????????

[skemp]

Sorry holeshot, when I first read your post yesterday, I thought that you said 250psi instead of 200psi. I just read through it again a while ago, and noticed my mistake. :o Sorry about that.
200psi is fine. You might be able to get away with 93 octane premium pump gas, but you should mix it with a little race gas. There are other motors out there running 11:1 with higher compression than you due to cut heads and thin head gaskets. Your compression is normal though. Stock is about 145, so you aren't too much higher than that. :D

edit: I'm not exactly sure on my compression, but I am probably pretty close to you. I need an adapter for my comp. gauge to measure mine. I am running 10.8:1 with no base gasket, and an OEM head gasket. I mix 50/50 with 110 octane and 91 octane pump.

[Chef]

Yep, you should be perfectly fine.