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Here is what I posted to the other list:
> I bought one of Rupert's RX-8 engines (6-port) on Ebay about 6 months
> ago. At the time, the US dollar was a bit stronger, so the price was
> $1800 USD. Now it is closer to $1900 USD.
>
> My engine arrived exactly as pictured. Complete with engine harness,
> injectors, fuel rails, intake manifold, throttle body, alternator, and
> sensors. Oil cooler lines are present, but bent close to the engine > for
> shipping.
>
> It arrived nicely padded and strapped on a pallet about 2 months > after I
> bought it. Shipping was about $300 to Denver. Paperwork fees were > about
> $200.
>
> I have not run the engine yet, but it seems just fine from what I can
> tell by inspection. I put a borescope in the ports. The rotors, seals,
> and walls look fine. No scoring or hot spots were apparent. Seems to
> have great compression turning by hand. I would take a very rough > guess
> at 20,000 miles, judging from the minor carbon on the rotor faces and
> exhaust ports.
>
> These engines have never been in a car. They were used by Mazda for > some
> sort of dyno testing. I suspect emissions testing, but that is just a
> wild guess. The clutch and pressure plate on mine had zero wear.
>
> I considered this engine from Rupert a super good deal. When I > bought it
> for such a low price, I knew that I would still be way ahead even if I
> had to rebuild it. The fact that it is in such good condition that I
> won't likely have to do anything internally was a bonus, from my
> perspective.
>
> Rupert is a good guy to deal with. Very helpful and a square dealer.
>
> Bill Dube'
Ed Anderson wrote:
That's certainly interesting, Randy, in that the 6 port and 4 port Rx-8 engine both use identical internal parts. True the induction system and port openings on the castings is different due to the number of ports - similar to the difference between the older 13B six port and 4 port turbo engines.
While the 6 port will reportedly produce higher HP, its only when you get up into the 8500+ rpm range that is true. Then the better high rpm breathing of the 6 port induction system gives it an edge in producing power. However, I know of no one who has exceeded 7500 rpm in aircraft application at this point. Tracy Crook as probably a couple hundred hours on a 4 port . I believe his conclusion was that the complexity of the six port intake Vs its potential adaptation for aircraft use made the 4 port preferable.
In any case, hard to understand why one engine would be junk when it shares the same design and parts as the other engine - sure would like to know some particulars about it.
Ed
----- Original Message ----- From: "randy echtinaw" <rjechtinaw@ia4u.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, February 07, 2006 7:17 PM
Subject: [FlyRotary] RX-8
Gentlemen,
I have the opportunity to purchase a 4 port or a 6 port RX-8 engine. I thought I wanted a 4 port because I thought it would be easier to muffel. I just heard a "rumor" that the 4 port is junk and go with the 6 port. I need 220-230 hp using the 2.85 PSRU, no turbo. I would consider P-porting if absolutely necessary to get the HP. Obviously, I know very little about engines and want to start with the best I can get so, considering my needs which one do I want?
Thank you,
Randy
-- Homepage: http://www.flyrotary.com/
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-- Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
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