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#31
Re: A14 head--728-402
rventura
Posted on: 2007/8/17 20:59
I think it can be "ported" if you want to spend some
 
#32
Re: A14 head--728-402
DatsunSSS
Posted on: 2007/8/17 21:31
this engine is runnig well,and is on my 120y.
the engine you are talking is the gx, that im buiding, is almost there.  this photo was taken today. ![Open in new window](javascript:CaricaFoto("http://datsun1200.com/modules/myalbum/photos/13915.jpg");)
#34
Re: A14 head--728-402
simmos_datto
Posted on: 2007/8/17 22:09
and where was the rev needle sitting?!? 
#35
Re: A14 head--728-402
ddgonzal
Posted on: 2007/8/17 23:52
Any head can be ported. Just use a dremel tool and some sandpaper...it doesn't cost much.
The head you describe has larger valves than a GX head. I suppose the ports are smaller though. Did you say they are round ports? See valve sizes chart
#36
Re: A14 head--728-402
DatsunSSS
Posted on: 2007/8/18 2:05
yes the ports are round just like a std a12 head.
the rev needle at 6000 rpm. i haveasked if i can port the head because this head has the air galleries to exaust manifold.
#37
Re: A14 head--728-402
ddgonzal
Posted on: 2007/8/19 7:53
If your goal is to make power above 6,000 rpm, a round-port is not the cylinder head you want.
You can port the heads with air passages. Cleaning up the bowl area around the valve stem will enhance the 2,000-4,500 rpm range.
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