Model T Ford Speed and Racing Equipment Part III

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Model T Ford Forum: Forum 2013: Model T Ford Speed and Racing Equipment Part III
Top of pagePrevious messageNext messageBottom of page Link to this message  By david greenlees on Tuesday, November 05, 2013 - 07:14 am:



Model T Ford Speed and Racing Equipment Part III: Part III of this series will cover the second version of 16 valve Roof cylinder head along with the first Roof 8 valve head. The first of the Frontenac cylinder heads manufactured by Louis Chevrolet also are also covered. Shown here are the Type B Roof 16 valve cylinder head with a revised rocker arm design and the patent drawing for the Models T, S and R Frontenac Cylinder heads.@ http://theoldmotor.com/?p=104928


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Trevan - Australia on Wednesday, November 06, 2013 - 05:11 am:

Can an experience person tell me what PISTON style and CAM profile to use with a 16 valve ANDERSON -ROOF -LAUREL HEAD when it's only going to be run in an a regular runabout style T .


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steven Meixner on Wednesday, November 06, 2013 - 10:17 am:

My 16 valve model BB has Laurel pistons, rods, and cam. The pistons are basically flat top that pop out of block 15/32. The cam is the 320 lift and gives the car very long legs with 3.00 gears. Steve


Top of pagePrevious messageNext messageBottom of page Link to this message  By John McGinnis in San Jose area, CA. on Wednesday, November 06, 2013 - 12:47 pm:

Steven,
Interesting to find what Laurel pistons were. I built a Roof 16 engine with my own design pistons which seem very similar to the Laurel ones. Just about the same pop-up. It has been running for 30 years.roof pistons


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, November 06, 2013 - 12:56 pm:

John
As I have a 16 valve that I want to put together, I would be very interested in what you can tell me about the pistons? I assume they were custom made. They certainly look like they should give some decent compression. I have a B version with the spark plugs on the side. I am wondering about clearance etc. for the plugs. I can see where your pistons would be great for the A version with the top mounted plugs. Is this what you have?
Then again maybe I am missing something here!!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, November 06, 2013 - 12:58 pm:

Incidentally I have made up a few of the "dog leg" exhaust pipe and the cross pipe in cast iron. I also have the valve covers in the correct style with lettering on only one cover.


Top of pagePrevious messageNext messageBottom of page Link to this message  By John McGinnis in San Jose area, CA. on Wednesday, November 06, 2013 - 01:01 pm:

And here is the completed engine as installed in my racer as shown in my profile.


roof engine

racer


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Trevan - Australia on Wednesday, November 06, 2013 - 02:43 pm:

Hi Les,
I am very interested in getting 2 manifolds and covers from you.

Could you advise prices --be it on the forum or direct please.
bob @bobtrevan.com.au


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, November 06, 2013 - 03:19 pm:

John
Is yours a B (small valve) or BB (big valve) version? With that much carburation I will assume it is the big valve version. Evidently you have had no problems with the side spark plugs and that sort of verification of success is really helpful to me.
Thank you for posting the pictures!!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Trevan - Australia on Wednesday, November 06, 2013 - 04:42 pm:

Hi John Mc,
Re the pistons you used -----IS THE RAISED SECTION ON TOP SOLID ?. Or is it hollow inside to keep the weight and balance better?.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Wednesday, November 06, 2013 - 04:56 pm:

I am wondering if maybe we (owners of these heads) should get together and have some sets of these "pop top" pistons cast up? Most of us are not going to make huge HP with these heads, but some pistons maybe in the 7-1 cr might be good?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Trevan - Australia on Wednesday, November 06, 2013 - 05:34 pm:

LES -- SOUNDS GOOD TO ME -


Top of pagePrevious messageNext messageBottom of page Link to this message  By John McGinnis in San Jose area, CA. on Wednesday, November 06, 2013 - 07:35 pm:

Bob and Les
The piston *pop ups* are not solid...they are relatively hollow with a waffle pattern support structure. They are relatively light. Made by Egge or Jahns....can't remember which, from a design I sent them. Valves are small..B head.
Cam is some unknown regrind...out of the past.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les VonNordheim on Wednesday, November 06, 2013 - 10:55 pm:

Jahns pistons had the waffle pattern design.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les Schubert on Thursday, November 07, 2013 - 06:18 pm:

Pistons for these heads.
I see my Roof B head is about 1 5/16" from the deck to the top of the combustion chamber
The reason I am thinking about this is I have the pattern used to make these pistons. They are for a 6 cylinder Scripps marine engine and I doubt I will ever need more.

These are 3 3/4" just like a T, but have a compression distance of 2 3/8" (and probably could be a little more). So with only a minor bit of modifications (lower the ring land area inside to get the rings closer to the wrist pin), I also know where to get them cast and machined


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