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Hi Hans, Doug , Ed, anyone else,
looking at the Mazda dyno graphs,
All RX8 engines are side port, the 4 port makes 200+ at 7000 right out of the box, so you can easily get 170-180 at 6000 rpm.
BR, Dave McC
On 9, Nov , at 6:10 PM, Hans Conser wrote:
Well, telling you upfront that I am not flying a 13B; I disagree with Ed, I don't think you will see that sort of power with a side port 13B unless you are over 7500 RPM. At leaast this is what I think based on some dyno runs with various side port engines I have built. P-Port is the way to go.
Hans
On Nov 8, 2006, at 9:03 PM, Ed Anderson wrote:
Hi Doug,
If you want to develop between 160 and 170 HP from a 13B, I for one would not consider a P port. The reason, is that the stock 13B will easily give you that kind of power with less effort and cost. If you wanted HP on the order of 200 + then a P port might be one approach to consider.
Now if you simply want to experiment with a P port, then got to it. But, it is simply not needed for the power levels you are looking for.
The only person I am aware of who may have the information you want is Jerry Hey - he use to be on the list, but I have not seeing anything from him recently. This is the last e mail address I have for Jerry Hey
E-mail Address(es):
jerryhey@earthlink.net
you might send him a message.
Best Regards
Ed
----- Original Message -----
From: DLOMHEIM@aol.com
To: Rotary motors in aircraft
Sent: Wednesday, November 08, 2006 10:45 PM
Subject: [FlyRotary] P Porting template?
I have a friend in Denver who is willing to set up his milling machine to mill out some P-Ports on a couple of my old rotor housings over Thanksgiving break. My question is if any of you know where I can get a copy of a template for use with 1.5" diameter intake pipes. I would think there would be something in the public domain by now (but I could be wrong). The potential benefits of a P-Port make it pretty attractive to at least experiment with at some point and I will be happy to develop between 160 and 170 hp in my 9A so I think that should be doable...
Doug
RV-9A, 13B installation |
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