SLOWAUTOEX

I have a D16y8 head that has been shaved...I bought it like that and I'm not sure exactly how much it has been shaved my two questions are what the stock deck height of the d16y8 is and how much is safe to shave off the head????

I'm thinking of getting it shaved more if thats possible I just don't know how much to shave it and how much is too much???

any help would be greatly appreciated thanks!!

SLOWAUTOEX

just found this for the deck height is that right for a y8?...8.347

SLOWAUTOEX

ahh correction its not the deck height...

its how much can the head be milled...?

SLOWAUTOEX

anybody??

SLOWAUTOEX

??

vtechjunkie

iTrader: (2)

There are tabs on the under-side of the head that indicated how much is left on the head.
Usually int he corners of the head. Or wether or not you can go any further that is. As far as how much has already come off, I don't know.

sidock

Why dont you find out what your actually looking for out of the head and tell the machine shop to do it...

SLOWAUTOEX

"Usually int he corners of the head. Or wether or not you can go any further that is."

Can you explain that a little better, please?

SLOWAUTOEX

"int he"=in the lol nevermind.

BigAnteg

u can shave around 10 thousand off the head and will give u some pretty high compression but i wouldnt take it father than that i took off 10 thousand of my head cause i wasnt paying attention but it made alot of differnce

SLOWAUTOEX

0.100 gets me 12.35:1

BigAnteg

how much u trying to shave off cause if u start shaving to much ur going to start having problems of it over heating cause one time we had a camaro with a 502 that we shaved alot off the head and had problems over heating

newtron63h

.100"? or .010"? .100" is one hundred thousandths. .010" is ten thousandths

vtechjunkie

iTrader: (2)

I wouldn't go past .075. You don't want to have to run race gas all the time do you? After about 12.5:1 you have to start thinking about detonation.

willimo

I milled a head .030 for just a little bump in compression. I wouldn't go further than that, really, and though you can technically go more, I'd agree with ^ and .075 is about as much as you want to go.

There are little circles cast into the underside of the head, near the corners. You'll see the shiny, milled surface that mates to the head gasket, there will be a C shape in that, and in the middle there will be a little circle that is cast in. It's hard to describe. That's your limit; beyond that you will be in danger of warping the head. I'll try to get a picture.

In any case, you need an adjustable cam gear. You'll be moving the cams closer to the crank, and that will affect your timing. You'll need to adjust it back a little bit or your car will run like a dog.

willimo

You can see the limit casting on the lower left corner of the head in this picture. It's just below the dowel pin. You cannot mill it any more than that.