Iron OHV prototype

Getting there!
 

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OK, the first fire up of the engine has taken place. I will post a video on Youtube, or you can view it on my Facebook page if you are on there.


EDIT: Here is the Youtube video link - https://youtu.be/X2zV8-KiBSU


Tod
 
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3 sample rocker covers for the OHV heads just out of the sand before clean up and shot blast.


Tod
 

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Fine job, a great deal of thought has gone into this, and the results arequite rewarding. So far I've spent 2 years and a few mistakes in developing my new intake port. It's basicaly done now, time to convert a block and try it. Unfortunately, even if it works, it's not for street, racing only. However if installed in a new casting would increase to preformance of the stock engine.
I hope.
Grampsr
 
Ol' Ron said:
Fine job, a great deal of thought has gone into this, and the results arequite rewarding. So far I've spent 2 years and a few mistakes in developing my new intake port. It's basicaly done now, time to convert a block and try it. Unfortunately, even if it works, it's not for street, racing only. However if installed in a new casting would increase to preformance of the stock engine.
I hope.
Grampsr
Click to expand...


Thanks Ron. I'm looking forward to seeing your results.



Tod
 
[FONT=Trebuchet MS, Arial, Helvetica]"Aluminum is lighter and easier to port and modify. However aluminum can "suck" more heat out of the chamber due to it's higher thermal conductivity. The aluminum head may run cooler, which helps pack more air into the chamber because the incoming cool air does not pick up as much heat. Both of these aspects can help avoid detonation and improve volumetric efficiency.
[/FONT][FONT=Trebuchet MS, Arial, Helvetica] However, loosing heat to the coolant rather than keeping in the chamber to push on the top of the piston should reduce thermal efficiency. This is typically insignificant to the other cooling benefits to aluminum."
[/FONT]https://performancetrends.com/Definitions/Heads.htm

See it in action:
https://www.youtube.com/watch?v=jdW1t8r8qYc[FONT=Trebuchet MS, Arial, Helvetica] [/FONT]
 
One of the exciting things I see here is maybe we can use a better exhaust system than with the standard port location. With the ports being higher, is it possible to use extractors with one of these heads in a RHD car?
Is there an ejector seat available too?
 
I can't see how extractors would do much with low revs and low compression.
The primary tubes need to be long, and that's ugly.
I gather the original exhaust manifold is not bad either.
 
updraught said:
I can't see how extractors would do much with low revs and low compression.
The primary tubes need to be long, and that's ugly.
I gather the original exhaust manifold is not bad either.
Click to expand...

There are more efficient exhaust systems available over there for Model As
https://www.snydersantiqueauto.com/product.htm?pid=979392&cat=41733
or
https://www.snydersantiqueauto.com/product.htm?pid=979393&cat=41733
With the inlet and exhaust ports being higher on the engine, I think the exhaust pipe in front of the muffler would have to be longer than original so these headers might not be suitable. What do those who have used an OHV head done in the past?
 
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