IH truck heads April 18, 2016 09:58AM
Is either of the 6 cylinder straight valve heads better than the other? The two casting numbers i know of is 69717R1 and 124475R1, i have both and want to know which one to run.
Reply Quote

Re: IH truck heads April 20, 2016 12:10AM
The 124475R1 has less water holes to deal with, (which is the black diamond head). The silver diamond head is the 69717R1 .
Reply Quote

Re: IH truck heads October 30, 2019 12:59AM
found a 254544C2 truck head. is this any good to get more compression in a c263 ih motor
Reply Quote

Re: IH truck heads April 21, 2016 02:24PM
black diamond is the best. silverdiamd is scrap iron. not worth much at all.
Reply Quote

Re: IH truck heads April 21, 2016 04:23PM
I would not say that exactly. They are both better than running a stock C301 head.
Reply Quote

Re: IH truck heads April 21, 2016 11:45PM
Hey Ohio puller, If u have any silver diamond heads that u want to sale for scrap value, I'll buy all u have. Let me know.
Reply Quote

Re: IH truck heads April 21, 2016 04:43PM
I have the 124475R1 on my current engine and have two spares, one of each number. One of those two need to go on my new engine. What is the better part of the black diamond if you dont mind my ask.
Reply Quote

Re: IH truck heads April 23, 2016 01:27AM
Just to set the record straight for everyone. Just bolting the truck heads on a c301 with no air flow improvements will not increase your perforance. The tractor heads, (both closed chamber and open chamber) and truck heads all flow about 155 cfm at .600 lift. The truck heads have the valves located in the middle of the combustion chamber allowing bigger valves, the intake ports have a higher ceiling which is good, but the short turn radious is where one needs to put their attention. It is possiblke to get 235cfm at .600 lift. We done it before and thats comparing stock and modified heads on same flow bench at 28inches and 4" piston. Hope this helps , probably more info than anyone ever wanted to know! Soo don't waste your time and money if your not going to make modifications.
Reply Quote

Newer Topic Older Topic

Author:

Your Email:


Subject:
Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.
Message:
Website Statistics
Global: Topics: 38,704, Posts: 229,805, Members: 3,330.
This forum: Topics: 37,081, Posts: 225,952.

Our newest member LT Limited Pro