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04-16-2021, 11:18 PM | #21 | |
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Re: SNYDER’S 5.5 head vs 6.1
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04-16-2021, 11:20 PM | #22 | |
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Re: SNYDER’S 5.5 head vs 6.1
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04-17-2021, 05:36 AM | #23 |
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Re: SNYDER’S 5.5 head vs 6.1
See the little device I made and the whole thread: https://www.fordbarn.com/forum/showt...ce#post1872892
I have only driven my Coupe with a stock head and a 6:1. In OD, on level ground at 50 mph, it sounds and feels better at less than 28 deg advance. If I come to a slope more than a gentle one, less advance is needed. You need to play with it under various conditions and listen and feel how the engine is straining or clattering and advance and retard as needed. Too much advance for a couple of revs won’t hurt the motor, ditto for too retarded. After a while, it becomes habitual. |
04-17-2021, 09:24 AM | #24 | |
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Re: SNYDER’S 5.5 head vs 6.1
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I do appreciate your feedback. When it comes to compression the stock 4.2 is very low so going up to 6.1 should not be an issue unless the engine is ready for a rebuild anyway. My engine is strong and I have no problem playing with the spark advance when needed so the 6.1 sounds like the way to go for me. Thank you and thanks to all for the feedback. Ron |
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04-18-2021, 06:06 AM | #25 |
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Re: SNYDER’S 5.5 head vs 6.1
Most Model-A drivers tend to over-advance, ...meaning they set the initial timing too far advanced which allows too much total advance when the spark lever is pulled all the way down. This really is not complicated other than some people try to overthink this. If someone is concerned/worried about the possibilities of detonation, then they should add an octane booster or just fill the gas tank with a mid-grade or premium grade of fuel. If the price difference between low and mid-grade is a dome, then we are speaking about a dollar more on a fill-up. FWIW, adding oil into the gasoline can lower the octane. If someone is actually using enough oil additive to be effective, (-not just a tablespoon or whatever) then it can increase the possibility of detonation.
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04-18-2021, 07:58 AM | #26 |
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Re: SNYDER’S 5.5 head vs 6.1
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The problem with performance and a manual advance distributor is you engine timing is only correct at the rpm your timing is set at.. A model a engine runs best at 1 degree advance per 100 rpm..5 degrees at 500 rpm,24 degrees at 2400 rpm.. with the timing fixed you are only correctly timed at one rpm, and you cant run the spark lever by hand to accurately map the timing needs of the engine...if you want an A engine to really perform mechanical advance is the only way to go. |
04-18-2021, 08:40 PM | #27 |
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Re: SNYDER’S 5.5 head vs 6.1
I actually have a Winfield 7, I was just reporting what I've observed on this forum over the last few years.
I haven't actually gotten the Winfield running yet, I started working on it in December and I've now replaced about half of the engine bay. Any day now! |
04-18-2021, 11:29 PM | #28 |
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Re: SNYDER’S 5.5 head vs 6.1
[QUOTE=alexiskai;2008598]I actually have a Winfield 7, I was just reporting what I've observed on this forum over the last few years.
I haven't actually gotten the Winfield running yet, I started working on it in December and I've now replaced about half of the engine bay. Any day now![/QUOTE Do you run mechanical advance like Jack talks about? What he said makes perfect sense. I only ran the stock head and I do try to adjust the spark as I drive. You can hear and feel what engine needs but I am sure I am in no way as accurate as mechanical advance. I would however like to keep the spark advance if I can master the 6.1. Ron |
04-18-2021, 11:37 PM | #29 | |
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Re: SNYDER’S 5.5 head vs 6.1
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I try to adjust the spark to what my car likes. When I start the car the spark is retarded and after I get it running I drop it a click or two until the engine sounds good to me but it's above 1/2. When I am driving along at 45 to 50 the stock head seams to like it about 1/2 way down. When I am going over 55 I drop it a click or two but my car never seems to like it all the way down even when I am running full out. Is this normal? How different will a 6.1 be from the method I use with my stock head? Forgive the simple questions as I have only had my car a few months. Thanks Ron |
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04-19-2021, 07:06 AM | #30 | |
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Re: SNYDER’S 5.5 head vs 6.1
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Ron the asking of simple questions are never an issue for me, ...and yes, I know when you purchased your car, who owned it and where it came from. While people may believe they can feel what their engine likes, the brutal truth is when the vehicle is placed on a chassis dyno, printed horsepower numbers show differently. As far as your engine, you telling me the spark lever location means nothing. That lever location is totally affected by the initial timing setting of the distributer cam. As far as total advance, the notch in the distributer body also affects how much advance can be made. Therefore no one here can tell you where the correct spark lever location is until they know the exact dist. cam timing location in relation to the piston. |
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04-19-2021, 08:26 AM | #31 |
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Re: SNYDER’S 5.5 head vs 6.1
I do use mechanical advance. There are generally two ways to do mechanical advance: on the distributor shaft, using the Phillips/Nu-Rex toroid accessory, or in the distributor body itself using a B or Mallory distributor. I will say, I think the Nu-Rex one is a lot easier to source.
The reason I use mechanical advance isn't so much that I don't believe I couldn't learn to control the spark manually, but rather that I don't want to turn a car that "anyone can drive" into a car that only I can drive. I'm planning to sell this car in a few years, and I'd prefer it if the next owner didn't have to immediately take the cylinder head off in order to feel safe using it. |
04-19-2021, 01:04 PM | #32 | |
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Re: SNYDER’S 5.5 head vs 6.1
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Small world Brent.....do you know Terry or Jim? From what I know Terry purchased the Phaeton in 1975 in Miami and then restored it about 12 years back. I got it from his son Jim in Northern Georgia as his Dad could no longer drive it. If you have any more info on my car please send me a private message. Thanks Ron |
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04-19-2021, 03:28 PM | #33 |
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Re: SNYDER’S 5.5 head vs 6.1
On a different note doe anyone know if the Snyder's head is made in the USA or not?
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04-19-2021, 03:35 PM | #34 |
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Re: SNYDER’S 5.5 head vs 6.1
Still made by Tod in Ohio, aren't they?
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04-19-2021, 10:35 PM | #35 |
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Re: SNYDER’S 5.5 head vs 6.1
I sure hope they are still made in Ohio. I work in Manufacturing Quality and the metallurgy of anything from China is junk on a good day. The metal they use is scrap and they do nothing to control the chemistry. I am very proud to say that I have convinced my company that buying from American Foundries at 5 times the cost is less costly than Poor Quality.
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