350kmileford
Well-known member
If one were to get a head milled, they would also have to get shorter pushrod, right? I am just wondering, if I get the new Aluminum head, how much can/can't I mill it so that I can retain stock pushrod length?
Milling head + pushrod length...stupid question?
- Thread starter 350kmileford
- Start date
pushrods are cheap and you can get them any length you want.
Gene Fiore
Famous Member
Or just get the adjustable rocker arm assembly and matching pushrods from classicinlines and you'll never have to worry about this kind of thing again. 
Howdy:
Adjusting pushrod length after milling the head is typically unnecessary because of the hydraulic lifters. Play of up to .125" can be accomidated you the Hydraulic lifters. The function of adjustible lifters allows you to take back the preload of hydraulic lifters and prevents premature collapse or pump up and valve float.
And as already stated by Addo, when altering any dimension one should always carefully check the relationship of the valve stem to the rocker. Also watching for the rocker arm touching any part of the spring and/or retainer. Also watch for spring bind and retainer to valve guide seal contact.
And, as Falcon Fanatic said, pushrods are avaiable in various lengths, so if geometry is way off a different length of pushrods is an easier option.
I believe that Mike's new heads are engineered so that stock valve train components can be used. Cam dimensions will likely have a greater effect on valve train geometry then milling the head. Maybe Mike will be along to add to this thread.
In the early days we used to shim the rocker arm stauncheon up to compensate for milling the head, but later found it unnecessary with the Hyd lifters.
Adios, David
Adjusting pushrod length after milling the head is typically unnecessary because of the hydraulic lifters. Play of up to .125" can be accomidated you the Hydraulic lifters. The function of adjustible lifters allows you to take back the preload of hydraulic lifters and prevents premature collapse or pump up and valve float.
And as already stated by Addo, when altering any dimension one should always carefully check the relationship of the valve stem to the rocker. Also watching for the rocker arm touching any part of the spring and/or retainer. Also watch for spring bind and retainer to valve guide seal contact.
And, as Falcon Fanatic said, pushrods are avaiable in various lengths, so if geometry is way off a different length of pushrods is an easier option.
I believe that Mike's new heads are engineered so that stock valve train components can be used. Cam dimensions will likely have a greater effect on valve train geometry then milling the head. Maybe Mike will be along to add to this thread.
In the early days we used to shim the rocker arm stauncheon up to compensate for milling the head, but later found it unnecessary with the Hyd lifters.
Adios, David
Gene Fiore":3jgl5bil said:Or just get the adjustable rocker arm assembly and matching pushrods from classicinlines and you'll never have to worry about this kind of thing again.
Oh right, I forget that some of these engines have non-adjustable rockers. That's just wrong. I though he was worried about maintaining ideal geometry.
