Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-10-2016, 02:59 PM   #1
Steve/IL
Senior Member
 
Steve/IL's Avatar
 
Join Date: May 2010
Location: Central Illinois
Posts: 370
Default Determining if 49-53 Weiand Aluminum Heads have been milled

I have chance to buy a nice used pair of 49-53 Weiand Heads. The face of the heads show where the combustion ring of the head gasket was seated and there is practically no corrosion around the water ports. I want to make sure that the heads have not been milled or to determine how much they have been milled.

Does anyone have a measurement from the spark plug seat to the face of the head and/or the depth of the combustion chamber to the face of the head. Measurements in thousands of an inch would be appreciated.
__________________
I've got the old car disease. Thankfully there's no cure!

Last edited by Steve/IL; 05-10-2016 at 03:00 PM. Reason: Start new paragraph
Steve/IL is offline   Reply With Quote
Old 05-10-2016, 03:36 PM   #2
Bored&Stroked
Senior Member
 
Bored&Stroked's Avatar
 
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,012
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

Just post some detailed pictures - that will give us an idea. If the combustion chamber areas over the pistons are smaller - than you know it has been milled.
Bored&Stroked is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-10-2016, 08:28 PM   #3
Steve/IL
Senior Member
 
Steve/IL's Avatar
 
Join Date: May 2010
Location: Central Illinois
Posts: 370
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

I haven't taken pictures. As I recall the edges of the combustion chambers are right out against the impression of the head gaskets.

Thanks, Bored&Stroked.

However, still looking for requested measurement(s) to double check.
__________________
I've got the old car disease. Thankfully there's no cure!
Steve/IL is offline   Reply With Quote
Old 05-10-2016, 10:01 PM   #4
Kurt in NJ
Senior Member
 
Kurt in NJ's Avatar
 
Join Date: May 2010
Location: on the Littlefield
Posts: 6,140
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

The model A weiand head i have that has never been cut has the compression ratio stamped in 2 places, one you can see with the head on, the other on the machined surface for the gasket---perhaps on V8 near the water neck, on the 4 it is by the waterpump

how close do the relief for the piston dome come to the gasket edge
Kurt in NJ is offline   Reply With Quote
Old 05-11-2016, 01:58 AM   #5
scooder
Senior Member
 
Join Date: Jul 2010
Posts: 2,593
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

Do you need uncut heads for a reason? I ask as the Weiand heads are relatively low compression compared with the regular high compression heads. About 70cc chamber.
Martin.
scooder is offline   Reply With Quote
Old 05-11-2016, 08:57 PM   #6
Steve/IL
Senior Member
 
Steve/IL's Avatar
 
Join Date: May 2010
Location: Central Illinois
Posts: 370
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

Sponsored Links (Register now to hide all advertisements)
Quote:
Originally Posted by Kurt in NJ View Post
The model A weiand head i have that has never been cut has the compression ratio stamped in 2 places, one you can see with the head on, the other on the machined surface for the gasket---perhaps on V8 near the water neck, on the 4 it is by the waterpump

how close do the relief for the piston dome come to the gasket edge
Kurt,

The relief (edge of dome) comes right out to the edge of the impression of the head gasket. Likely not milled.
__________________
I've got the old car disease. Thankfully there's no cure!
Steve/IL is offline   Reply With Quote
Old 05-11-2016, 09:09 PM   #7
Steve/IL
Senior Member
 
Steve/IL's Avatar
 
Join Date: May 2010
Location: Central Illinois
Posts: 370
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

Quote:
Originally Posted by scooder View Post
Do you need uncut heads for a reason? I ask as the Weiand heads are relatively low compression compared with the regular high compression heads. About 70cc chamber.
Martin.
Scooder,

I really don't need uncut heads. Primarily, I just want to know where I'm starting from (no surprises). I haven't decided what cam to use, but it will be something without a lot of lift. I just want a decent running street engine. I will check piston to dome and valve open clearances and may even mill the heads to get the compression up.
__________________
I've got the old car disease. Thankfully there's no cure!

Last edited by Steve/IL; 05-12-2016 at 06:07 PM. Reason: spelling
Steve/IL is offline   Reply With Quote
Old 05-12-2016, 07:29 AM   #8
Ol' Ron
Senior Member
 
Ol' Ron's Avatar
 
Join Date: May 2010
Location: Chester Vt
Posts: 8,841
Default Re: Determining if 49-53 Weiand Aluminum Heads have been milled

Installing heads requires a few measurments, to take advantage of a tight combustion chamber for better complete combustion. This has nothing to do with compression ratio. However, knowing the CR will determine the Octane requirement of the engine. The piston to head clearance should be .040/.050". and the volume of the chamber will determine the CR. As long as the valves don't hit the head your golden. Good luck
Ol' Ron is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 03:52 PM.