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08-16-2014, 05:09 PM | #21 |
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Re: Tod winfield/ weiand head
Don't know where that story started from but I have had 2 of the new Al. Winfield heads, both ordered as and both had the Crowsfoot chamber and came that way as cast.
Last edited by just plain bill; 08-16-2014 at 05:15 PM. |
08-16-2014, 06:09 PM | #22 |
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Re: Tod winfield/ weiand head
This may not pertain to the variation in some of the aluminum Winfield repro combustion chambers but... It seems that back in the mid ninties when Specialty Ford parts in Rosemead CA offered the heads, they were available in both 6 and 7 to 1 ratios. Couldn't this be the reason for the variation is combustion chamber shape ? It seems that grinding away material from an already formed chamber would lower the ratio.
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08-16-2014, 07:23 PM | #23 | |
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Re: Tod winfield/ weiand head
Quote:
Tod |
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08-16-2014, 07:47 PM | #24 | |
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Re: Tod winfield/ weiand head
Quote:
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08-18-2014, 02:38 PM | #25 |
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Re: Tod winfield/ weiand head
Today I ran the first roughing pass on the top of the head pattern. Need to get this cut asap. More pattern work requests came in today. Chop, chop, giddy up!
My foundry was also asking about making more blocks. I'm kinda stuck in the shop right now so getting to the foundry is difficult. So when we do make the next ones I'll just go ahead and make 4 castings at once. Maybe in a couple or 3 weeks, depending on how busy the core shop is. Tod |
08-19-2014, 02:27 PM | #26 |
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Re: Tod winfield/ weiand head
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08-19-2014, 03:16 PM | #27 |
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Re: Tod winfield/ weiand head
Kinda defeats the purpose of having a 7:1 head, doesn't it?
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08-19-2014, 03:20 PM | #28 |
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Re: Tod winfield/ weiand head
CarlG
Not really as the pistons take up most of the extra space. The piston to head clearance is back to what it should be.
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08-19-2014, 03:50 PM | #29 |
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Re: Tod winfield/ weiand head
The pistons originally protruded just a bit over .032 thirty two thousants. I think that the head gasket compresses to about .060 when torqued down to the block . Two gaskets would be a hundred and twenty thousants compressed, then add the thickness of the shim gasket. Thats a lot of gasket. You only need thirty to thirty five thousants clearsnce between piston and head when the head is torqued down on the gasket . I'm surprised that you didn't need longer studs.
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08-19-2014, 04:09 PM | #30 |
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Re: Tod winfield/ weiand head
Purdy:
I am using aftermarket racing studs that are slightly longer than the originals. I believe they are the length of the one that is supposed to have the ignition wire clamp on it. The copper gasket is .031 thick. I don't remember exactly but I think the pistons were up about .117 above the block. They were all right with the stock head but not with the 7:1 head. These heads are not under cut like a stock head.
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08-19-2014, 04:48 PM | #31 | |
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Re: Tod winfield/ weiand head
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08-19-2014, 05:16 PM | #32 |
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Re: Tod winfield/ weiand head
Rex A Lot
Thanks Dick
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08-20-2014, 11:58 AM | #33 |
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Re: Tod winfield/ weiand head
If you call Antique Auto in Rosemead and give them the numbers stamped into the head they can tell you what the ratio was. I called and my head is/was 7 to 1 and it is a "Crowsfoot"
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08-20-2014, 12:09 PM | #34 |
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Re: Tod winfield/ weiand head
The rough cutting of the top is complete. It would have been done yesterday but the power company blew out the power for a few blocks around me in the afternoon. So, I got a couple of hours off on a fairly nice afternoon. Be starting on the finish pass soon.
Tod |
08-20-2014, 01:19 PM | #35 |
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Re: Tod winfield/ weiand head
Just plain bill:
I called Antique Auto and gave them my S/N. They said it is a 7:1 crows foot head and around 120cc. Dick
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08-20-2014, 10:41 PM | #36 | |
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Re: Tod winfield/ weiand head
Quote:
I've re-read your input here and concerning problem with hole in head and dist. size difference. BTW, I have the head on right of you pics (8.5:1 cr). So today, I went and checked a recently got Bubba alum dist, with the Winfield head hole ...for fitment. What thousand clearance is acceptable between these two, if you know ? Anyway, my new dist fits the Winfield head hole and has (guess) .005 clearance....good/bad/ugly ,eh Here's my main concern. The dist HAS A RADIUS where it meets the Winfield head and this radii had the dist sitting up off of the face of the Winfield maybe .050 (will measure if anyone thinks that this is wrong/problem). WHY this radius at all, I have no idea..what am I missing here ? Should the Winfield have a relief cut in same area to match dist or should the dist radii be cut off ? Now, I checked the original old cast iron heads and it is FLAT in this area, and no radius at bottom of my old dists. Haven't contacted Bubba to discuss yet. Want to see what you say first. |
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08-21-2014, 05:55 AM | #37 |
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Re: Tod winfield/ weiand head
Finish pass is cutting on the top today.
Tod |
08-22-2014, 01:32 PM | #38 |
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Re: Tod winfield/ weiand head
The top of the pattern is all cut and I test fit it in the mold box setup. "A"-OK! I can paint it and make a mold to fit the core plug into and then use as the first sample for the casting.
Tod |
08-22-2014, 06:54 PM | #39 |
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Re: Tod winfield/ weiand head
Good news, fast progress as always
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08-23-2014, 10:03 AM | #40 |
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Re: Tod winfield/ weiand head
Nothing ever moves quick enough for me. The time from idea to production is like eternity to an impatient man. In the last week, while finishing the top, I got my foundry and core quotes and have my final cost worked out for iron or aluminum. I also drew up the "B" pump end and a finned style. I need to go over the poll again and see what all I will have to do.
First will be the Winfield style with the square cornered chamber, then the crow's foot. Tod |
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