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Re: H95 "Small Oval, Shrouded-Port" head
No life (a.k.a. DattoMaster)
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Quote:

dimlight65 wrote:
Quote:

D wrote:
Can you please post up some pics of this rare head, I really like the super deep tub chambers they are like some of the Harley aftermarket head combustion chambers focusing the charge in the centre of the piston with little wasted on the bore walls of the engine.


I will see what I can do... which translates into asking Tensandtwenties to do it for me since I am just barely computer literate.


I'll post up some this weekend. Probably in a "for sale" ad.

Posted on: 2012/6/28 0:42
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1973 Datsun B110 Coupe (A15/5spd)
1977 Datsun 280Zed (5.0L/5spd)
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Re: H95 "Small Oval, Shrouded-Port" head
No life (a.k.a. DattoMaster)
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ddgonzal wrote:
needs very high RPM?
How would it work on a 1608 engine? Or an A15?


Personally, I think it would work fine on any engine that you can routinely drive in the 4500-9000rpm range. It doesn't do so well below 3500, hence why he says "worthless for a street engine".

Posted on: 2012/6/28 0:56
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1973 Datsun B110 Coupe (A15/5spd)
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Re: H95 "Small Oval, Shrouded-Port" head
No life (a.k.a. DattoMaster)
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Pics as promised...

BIG ports:
Open in new window


Sunken combustion chambers (chambers coated with thermal barrier):
Open in new window


Close-up of port work (note the coating on the walls):
Open in new window



Anybody want it for their high-revving A-series?

Posted on: 2012/7/1 20:39
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1973 Datsun B110 Coupe (A15/5spd)
1977 Datsun 280Zed (5.0L/5spd)
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Re: H95 "Small Oval, Shrouded-Port" head
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wow, i see you went very much wider, but not very tall as in GX tall.

Attach file:



jpg  port_detail.jpg (21.85 KB)
174_4ff0ec360658d.jpg 219X366 px

Posted on: 2012/7/2 1:32
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Re: H95 "Small Oval, Shrouded-Port" head
No life (a.k.a. DattoMaster)
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Are those single springs for high revs?
valves dont seem that big for high flow.

Posted on: 2012/7/2 15:01
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Re: H95 "Small Oval, Shrouded-Port" head
No life (a.k.a. DattoMaster)
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Quote:

D wrote:
valves dont seem that big for high flow.


As I recall, the head builder felt like bigger valves wouldn't do much to improve flow?

Posted on: 2012/7/3 2:42
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1973 Datsun B110 Coupe (A15/5spd)
1977 Datsun 280Zed (5.0L/5spd)
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Re: H95 "Small Oval, Shrouded-Port" head
No life (a.k.a. DattoMaster)
Joined:
2001/10/15 3:29
From Arlington, TX, USA
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Posts: 1305
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Quote:

ddgonzal wrote:
wow, i see you went very much wider, but not very tall as in GX tall.


Port inlet is matched to an OEM A14/A15 gasket, not the GX gasket, so...

Posted on: 2012/7/3 2:45
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