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Thread: What Ra finish is on the Zetec head?? Reply to Thread
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Topic Review (Newest First)
05-23-2013 10:40 PM
wisebag02 I've got more pics for your eyes to feast on

05-23-2013 09:59 PM
iminhell That is a beautiful job. Kudos to the machinist/machine.
05-23-2013 11:29 AM
wisebag02 Gonna try this-

First pic is before the head shave, second one is after.
05-22-2013 07:37 PM
Originally Posted by iminhell View Post
Use image tags; [img] full url [/img]
Could you explain that a little more. I don't know Could be different using the mobile app.
05-22-2013 02:28 PM
iminhell Use image tags; [img] full url [/img]
05-22-2013 01:59 PM
wisebag02 Anybody know how I can make the pictures appear right in the post?
05-21-2013 12:48 PM
wisebag02 Finally got some pics put up on flickr of the before n after of the zetec head shave. I had .020" taken off for a 10.15:1CR.
Finish is definetely better now than stock original.

Here are some before pics:

04-23-2013 03:51 AM
wisebag02 Well, I've found a shop near me that can shave .020 off my zetec head. Using the formula from the compression ratio thread, I came up with 10.15CR up from the stock 9.6. I'd be happy enough with that- I want to be able to save a little $ still run 89 octane if I want.

And the guy at the shop said I don't have to take the valves out. As long as the cams are out and valves are closed, it wouldn't be a problem. He will mill it, then use a diamond wheel to put on a finish better than 30Ra. I still did something goofy when prepping though: I put a layer of white lithium grease in the crevices around the valves just in case. Also put tape over the ports and installed an old set of spark plugs to keep chips out of there too.

All for $75. I'll keep you guys posted and hopefully have some pics of before & after.
04-13-2013 04:13 AM
amc49 X2, also, never leave any parts on that can mysterious disappear when the machinist decides he doesn't want this or that part on, it's in the way of his work. They need the upper flat on top of head totally unencumbered to use as the register point to fasten the head down. Valves have to be out depending on depth of cut and head design.
04-13-2013 01:31 AM
wisebag02 Ok. .
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