11-10-2020, 09:25 AM | #1 |
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Join Date: May 2010
Posts: 195
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model A head
The cyl. head on my Model is cracked I have a good red Winfield 7.1 head that I purchased in 1955 and never used. Would in be advisable to use this head? Would it be to much compression for a stock A? Are those old Red Winfield heads worth anything?
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11-10-2020, 09:40 AM | #2 |
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Join Date: Apr 2018
Location: Mebane NC
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Re: model A head
I'm about to put a repro Winfield on my stock A, I'd say go ahead. Or sell it and buy a Snyder's 6 if you're nervous.
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11-10-2020, 12:38 PM | #3 |
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Join Date: Jun 2010
Location: Temecula, CA
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Re: model A head
Winfield heads were the best head available at the time, and are still very good. Most guys will tell you that 7:1 is too much, I say it is not. I ran a 7.4:1 Cyclone head on my widebed for several years with no problems. The thing to watch is that higher compression needs less spark advance, or detonation will occur, and likely cause engine damage. The Cyclone is like the Winfield "crows-foot" head. Probably no more than 26 degrees of total spark advance should be used. That head and a bigger carb will result in a huge increase in performance. It has good value, up to $600.
Last edited by Jim Brierley; 11-10-2020 at 12:40 PM. Reason: Added info |
11-10-2020, 01:11 PM | #4 |
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Join Date: Apr 2018
Location: Mebane NC
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Re: model A head
This might be a good place to ask something I've been wondering, which is how to tell if you're getting close to detonation. I have the Nu-Rex auto advance on this motor I'm about to put the Winfield on. Am I probably good if I just set the baseline a bit more retarded? What would be my cues that I should back it off?
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11-11-2020, 09:39 AM | #5 |
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Re: model A head
Mr Brierley is correct,he actually did write the book red head,FSI mechanical advance electronic distributor,late B cam and single 97 (running a 94 now)and a reds 4 into 2 header..I found timing best at 1 degree per 100 rpm. What's amazing is the engine runs cooler and is more efficient than stock.
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11-11-2020, 12:12 PM | #6 |
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Re: model A head
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11-11-2020, 01:07 PM | #7 | |
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Re: model A head
Quote:
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11-11-2020, 10:08 PM | #8 | |
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Re: model A head
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