How much milled off heads to raise compression
Yeah new pistons sounds good but the frig factor is high. Would they have to be custom made or does someone make them already? The cam I want
Calls for 10.5 to one and now have
9 to one, if I’m lucky. BTW does nitrous work better with high or low compression??
Milling for compression certainly can be and has been done. A lot in fact. I've done it myself...however, I don't recommend it. I've done it really recently too, but on a slant six. That's a little different bird, though, as the head sits straight and the manifolds bolt to the side of the head.
If you mill for compression, for 1 compression ratio, you're going to be in the .080" neighborhood. Stacking that up on a feeler gauge doesn't look like much, but what happens is, it changes the angle at which the intake manifold sits on the engine and will require the intake to be milled to match in order for the bolt holes and ports to line up and for it to seal properly. So, in reality, the friggin will probably be close to the same, because machine shops charge more to cut more amounts off, plus, you have to have the intake milled to match, so there's your piston cost.
Besides all "that", the stock compression ratio on the Magnums is over 9:1. The difference between compression ratios, say from 9:1 to 10:1 is only about a 3% power increase. If it was mine, I'd leave it alone.
