subtle_driver

dang people, I just want to know how much i need to shave off to get about a point gain or slightly more on my e88.... I am just starting out in the world of work, so i don;t make much money, so ya, shaving is a good option for me. I'll back off the timing and richen it up to keep it from pinging. LOL!!!

I measured the head thickness, it is 4.5 inches exactly[for my used e88].

sounds like 9:5 would be desireable. Now I just need the specs for the machinist....

here is some more info, The head is ported, and I am running a schnieder stage 3 cam with springs, and free flowing exaust with headers, SM needles on my SUs, high volume electric fuel pump, turbo oil pump, no fan clutch, no smog, electronic ignition, 5 speed, lightened flywheel, underdrive pulley.... just bolt ons.. mostly stock. I was just advised to raise it to 9:5 or 10:1 at least when installing the cam. The head is off, and I want to do it. I just need some machining specs. It doesn have to be perfect, at least somewhere between 9:5 and 10:1. I am going to use a Felpro gasket. I will tune it to run richer, and adjust cam, and ign. timing accordingly. And I am going to use 91 gas. please advise.....

Hi, I have a stock 73 240z L24/E88. I want to raise the compression to approximately 10:1. What is the required amount to shave from the head (e88) to get near to this compression. My E88 head is used, and it has been shaved before[unknown specs]. I need the stock/unshaved "thickness" measurement from the top to bottom (head gasket surface, to the valve cover). And I need the thickness required top attain apporoximatly 10:1 ratio. THANKS!!!!!! The machinist needs to know how much he needs to take off.