Snyder’s head question

[walls]

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”?

[walls]

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?

[Synchro909]

A photo of the under side showing the combustion chambers would help.

[walls]

Pic of the combustion chambers

[walls]

Again, now that I’m looking, I’m thinking this is a stock head.
Do you agree?

[nkaminar]

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All things head to here: https://www.fordgarage.com/pages/hea...ssionratio.htm

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.

[Smokedtires]

I have no dimple on my 6.0 Snyder head. Attached pic of combustion chamber.

[walls]

Originally Posted by Smokedtires

I have no dimple on my 6.0 Snyder head. Attached pic of combustion chamber.

Looks like mine is a stock head.
I thought it was a Snyder head, but compared to yours, the combustion area goes further into the piston area.

[Synchro909]

Originally Posted by walls

Looks like mine is a stock head.
I thought it was a Snyder head, but compared to yours, the combustion area goes further into the piston area.

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.

[Terry Burtz, Calif]

Originally Posted by walls

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”?

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.

[31a]

The picture you show is a stock head.

[cas3]

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 ?

[Y-Blockhead]

Originally Posted by cas3

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 ?

Snyder's 5.5 head has two dots as seen in picture. I am not sure about the 6.0.

[cas3]

Thanks for that info, Y block

[walls]

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.

[ModelA29]

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.

[rich40701]

Just got a Snyder's 6.0 head after flip flopping between 5.5 or 6 and the 6 does not have the dots.

[rich40701]

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?

[Smokedtires]

Originally Posted by rich40701

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?

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.

[Synchro909]

Originally Posted by Smokedtires

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.

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.