1800 stock head dimensions

[CajunMike]

Does anyone have the thickness of a stock 1800 head? What is the max one could shave off to put it on a 2l block?

[narfire]

I was told that max on a stock head (untouched)was 20 thou. I'd be thinking that would shorten it a bit, affecting the lining up of the teeth on the cam wheels . Perhaps adjustable cam wheels would make up that difference. I have noticed that one tooth out makes a difference in the performance.

[BEEK]

the limits of shaving a fiat head are in the intake seat. there is only so much material you can remove before the intake seat will become compromised. i have never tried to angle mill a fiat head... that may be worth looking into. will have to use adjustable cam pullies and a larger tensioner bearing (outside diameter) depending on how much material is removed

[Daniel]

the max you can go is about 40 thou but this is a lot why would you want to do this is it to raise the compression ?

[CajunMike]

Im not wanting to do this. I've gotten a used 1800 head that my machine guy thinks may have been shaved. Trying to figure out what a bone stock 1800 thickness is and how much shaving is too much. He's never done a tc head and noted that the valves overlap a little and there seem to be rough plane marks on the head. I've never seen more than 1 1800 head either to be able to tell him if it's normal or not and I don't have any stock dimensions.

[Daniel]

ill post some photos for you to compare when i get home later much later tonight .

[Daniel]

here are some photos i used the direct link so you can view them in full size some of the heads had some dust on them
while shooting the pictures but didn't look so bad in person some how the lighting really picked up on the dust didn't
noticed before taking these a while back .

stock 1800 head 5 thou removed
http://hostingbytes.us/images/3/964392.jpg
http://hostingbytes.us/images/3/10052010.jpg
http://hostingbytes.us/images/3/868118.jpg

Modified 1800 Stock 2000 Stock 1800 Heads
http://hostingbytes.us/images/3/1805332.jpg

Over 40 Thou Milled 1800 head you can see the Valve seat was cut slightly but is ok also this head I reshaped
the combustion chamber for better performance so it will look different then a stock head
http://hostingbytes.us/images/3/6832699.jpg
http://hostingbytes.us/images/3/4335548.jpg

Stock 1800 Head 5 thou milled
http://hostingbytes.us/images/3/7756644.jpg
http://hostingbytes.us/images/3/4490782.jpg

[So Cal Mark]

there is a Fiat factory tool that fits into the combustion chamber that will measure how much has been shaved from the head

[CajunMike]

Daniel, thanks for the pics! On a stock head do the valves stick up over the deck just a little?
One of your modified pics seems to do this but what about stock?

[Daniel]

I can make this easy, if you want ? post a photo of your head I've built a ton of these and other people on the forum
as well then we can get a good perspective on the head and tell you what we think .

[CajunMike]

It's at the machine shop. I'll see if he can take a pic.
Thx.