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#1 |
Senior Member
Join Date: May 2010
Location: SE PA
Posts: 101
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I have what I believe is a 6:1 Snyder’s head
I pulled it off a B engine that I bought last year. Using that as a frame of reference, I’m assuming the head on my coupe also has a Snyder 6:1 head. I haven’t driven it since I bought more than a year ago and I’m getting ready to get it running/driving. What are the odds these same marks without being the same head? Or do all model A heads have these “dots”? |
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#2 |
Senior Member
Join Date: May 2010
Location: SE PA
Posts: 101
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Now that I’m looking, I see there are stock heads listed on eBay with those dots.
Is there any way to tell whether stock or Snyders head? |
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#3 |
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Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,564
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A photo of the under side showing the combustion chambers would help.
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I'm part of the only ever generation with an analogue childhood and a digital adulthood. |
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#4 |
Senior Member
Join Date: May 2010
Location: SE PA
Posts: 101
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Pic of the combustion chambers
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#5 |
Senior Member
Join Date: May 2010
Location: SE PA
Posts: 101
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Again, now that I’m looking, I’m thinking this is a stock head.
Do you agree? |
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#6 |
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Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,114
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Looks like a Snyders 6.0 head to me. By the way, in my opinion, that is an excellent combustion chamber design. Ask Don at Snyders.
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A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
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#7 |
Senior Member
Join Date: Jun 2022
Location: Baldwinsville NY
Posts: 177
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I have no dimple on my 6.0 Snyder head. Attached pic of combustion chamber.
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#8 |
Senior Member
Join Date: May 2010
Location: SE PA
Posts: 101
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#9 |
Senior Member
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,564
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And I think the combustion chamber is deeper (that may be an optical illusion) which all means that it is not a particularly high CR head.
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I'm part of the only ever generation with an analogue childhood and a digital adulthood. |
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#10 | |
Senior Member
Join Date: May 2010
Location: Campbell,CA, USA
Posts: 329
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That is an original Model A head. All original heads (and the Burtz head) have those marks. The 3 marks that you found are where core support wires exited the casting and most were ground off as part of the casting cleanup. |
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#11 |
Senior Member
Join Date: Jun 2010
Location: College Station, Tx
Posts: 326
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The picture you show is a stock head.
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#12 |
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Join Date: Jan 2011
Location: sw minnesota
Posts: 4,618
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I have always thought the snyder head has no marks at all on the top, where as a stock A head will have some casting #'s . True ?
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#13 | |
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Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,928
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#14 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,618
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Thanks for that info, Y block
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#15 |
Senior Member
Join Date: May 2010
Location: SE PA
Posts: 101
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Thanks fellas.
I’ve been messing with these cars off and on for 12 years or so and still amazes me how much I don’t know. |
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#16 |
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Join Date: Sep 2022
Location: SoCal
Posts: 629
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The problem with heads is everyone wants them to look stock on the outside. The only way to tell is by the combustion chamber. Even then someone may have cast a similar looking chamber (but deeper or shallower) knocking off a part without doing the hard work. You need to figure out the actual volume of the combustion chamber to know for sure.
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#17 |
Member
Join Date: Mar 2022
Location: Corbin, KY
Posts: 78
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Just got a Snyder's 6.0 head after flip flopping between 5.5 or 6 and the 6 does not have the dots.
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#18 |
Member
Join Date: Mar 2022
Location: Corbin, KY
Posts: 78
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The Snyder's 6.0 combustion chamber is pretty rough; would there be any benefit to smoothing it up or would that change the volume too much?
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#19 |
Senior Member
Join Date: Jun 2022
Location: Baldwinsville NY
Posts: 177
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I've always been in the habit of breaking any sharp edges in the combustion chamber. My fear is, if there is someplace that can start to heat up and glow, it might cause a premature ignition.
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#20 |
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Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,564
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I agree with that and I don't think there is any point getting too enthusiastic about it. Carbon build-up over time is likely to create more points for pre ignition IMO.
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