Bill,
Sure! for the die hart 'got to have' that additional HP, go for the 6 port
and have a go at getting it - that's experimental.
If you have the talent and the resources to make it work - we all would love
to see a positive outcome!

I'd much rather have a P-Port and the simpler porting.
I'm P-P'ing the single with RX 8 rotor - for that very reason.
George ( down under)


> >I must say I agree with Tracy on this, after looking at both, the only
> >difference been power seems ( to me) to be as a result of the complex
> >porting. As this will be scrapped for a 'home-brew' port arrangement, I
> >believe the 4 port will be a lot easier to work on - for the average
builder!
>
>          The two extra ports get you 40 extra HP with no additional
weight.
>
>          This is a 20% increase in HP for the trouble of building two more
> runners on the intake.
>
>          The top speed for an RV-7 with 247 HP could be 240 MPH, perhaps
> even more with a skinny cowling. (I realize this is beyond the 230 mph
Vne,
> but I was just making a point.....)
>
>          Regardless, it's fun just to think about a 75% cruise speed of
213
> mph.
>
>          Bill Dube'
>
>
>
>
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