Stock top crow foot head, again

T

Tod

Well-known member
The 3rd sample casting proved even better than the first 2, which are in the hands of builders. I made 4 more prototypes and here is the first one of those machined. These are around 7:1 (just a bit over).


Tod
 

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All 4 of the next samples have been machined and they came out nice. I think all 4 of them are already sold, but I will be making a batch for the next buyers as soon as I have at least a dozen to make.


Tod
 
This is very interesting, (and cool). I have not seen that shape before but I don't know a lot about the different shapes, just that there are several. Can you explain the advantages of this combustion chamber compared to others? Thanks.
 
The squish area, where the piston comes close to the head, is what give a puff of air that creates the turbulence. The more turbulence the better the performance. The trick is to not cut off the flow of air into the cylinder by the head. Plus, the more centralized the spark plug, the faster the air/fuel will burn which helps performance. I would guess that Tod's head and the Winfield have been designed with these things in mind. The flathead Briggs and Stratton heads were a good design.
 

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Is the head made from gray iron (class 30/40) or ductile iron (60-40-18, etc.)?? Nice looking casting and machining. Are you planning on leaving the foundry logo on the head as well as HT #?
 
nkaminar said:
The flathead Briggs and Stratton heads were a good design.
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They were the ultimate for efficiency which equates to maximum hp and gas mileage.
Maximum available transfer area with minimum depth and ideal plug location for fastest flame front speed to full chamber.
 
Hello Tod, yes the Model B 7.1.I received from you last year performs realy well I love it.
Cheers Ross in very warm Mangawhai NZ
 
Pete said:
They were the ultimate for efficiency which equates to maximum hp and gas mileage.
Maximum available transfer area with minimum depth and ideal plug location for fastest flame front speed to full chamber.
Click to expand...

It would be interesting to compare that to the Harley Davidson racing KR750 flatties, which have a similar reputation.
 
Mikes Garage said:
Since I am A "Junior Member" I apparently have not earned the right to send personal messages or email. Therefore I am unable to contact Tod.
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Mike,


I sent you a private message. I do not spend much time on Ford Barn these days.



Tod
 
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