(800) 853-2651
SHOP NOW

h head milling

S

steveolboy

New User
How much can you safely mill off an H head to jump up compression a bit. I have a factory x1 hi comp motor, but am looking for a little more power for pulling without bending the rules too much or closing in on clearences to the piston/valves. Anyone been there?
 
Milling that head won't gain enough to be worth the trouble as it is so low comp to start with that it would take a lot to do any good and you can't take that much off without ruining the head. Put in domed piston if you want to up comp ratio. That will only gain you a few ponies also.
 
(quoted from post at 04:32:44 05/22/12) How much can you safely mill off an H head to jump up compression a bit. I have a factory x1 hi comp motor, but am looking for a little more power for pulling without bending the rules too much or closing in on clearences to the piston/valves. Anyone been there?
Click to expand...


No one is making those heads anymore. What we have now is all there is. Please do not mill off anymore than necessary to achieve a nice, flat and true surface.
 
The answer is that some have taken .100" off and some that tried that found waterjacket (not good)
Assuming you know it has never been milled .050 is not alarming. Pistons make more power with less work. Jim
 
(quoted from post at 09:07:58 05/22/12)
(quoted from post at 04:32:44 05/22/12) How much can you safely mill off an H head to jump up compression a bit. I have a factory x1 hi comp motor, but am looking for a little more power for pulling without bending the rules too much or closing in on clearences to the piston/valves. Anyone been there?
Click to expand...


No one is making those heads anymore. What we have now is all there is. Please do not mill off anymore than necessary to achieve a nice, flat and true surface.
Click to expand...

Someone is making them again now. They are available on eBay.
 
You must log in or register to reply here.

Similar threads

G
Farmall H C152 piston ring help
Replies
11
Views
398
Highwayman
H
H
350 lp head and firecraters
Replies
3
Views
411
the tractor vet
T
T
656 Gas Hydro Blown Head Gasket and Holy Valve
2 3 4
Replies
71
Views
3K
wore out
wore out
M
New-to-me JD-A and JD-B Repair Tips
Replies
13
Views
938
Fixingfarmer
Fixingfarmer
D
Ford 640 with high compression pistons
Replies
10
Views
640
RBnSC
RBnSC
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top