I'm not sure that is true. The -9 has the same firewall as the -6 and -7. So, a -7 cowl will fit as will a Sam James cowl.I've heard some reports (though I can't find them now with a quick search) that the angle-valve 360 will not in the cowling of the 9, so you are realistically limited to the parallel valve unless you want to do some major cowling work.
I'm a proud and well-armed Infidel, not really worried about the Taliban, let 'em come...
You'll have the fastest climbing RV-9 ever!
I have a brand new >200hp parallel IO-360 for sale if interested.
You'll have the fastest climbing RV-9 ever!
I have a brand new >200hp parallel IO-360 for sale if interested.
I believe many pilot are not aware on this and will build the aircraft! After reading this article I know I will limit my future RV7 to 200HP,,,
Has anyone installed a angle valve IO-360 on a RV9?
Go look at all of the 9As that have flipped.I have a low time io360 angle valve sittin in the corner of hanger and I was thinking about hanging it on the -9.
I'd also be interested if anyone else has tried it and what their feedback was.
Go look at all of the 9As that have flipped.
All except one in Alaska on a gravel rutted runway had O-360's installed....
See post #3
Also, post #3 doesn't speak to the original question.
Hopefully, guys who have done it will respond with honest answers as to the wisdom of doing it.
.
You just demonstrated that there is no wisdom in doing it...A IO360 200 HP in the RV-9 or 9A does not make much sense. If you want verification that statement ask Van. I did a long time ago (re 180 HP) and was really put down on the subject. They go to a lot of trouble designing an airplane to meet a specific mission and get a little testy when asked to comment on the subject.
Hopefully, guys who have done it will respond with honest answers as to the wisdom of doing it.
...Hopefully, guys who have done it will respond with honest answers as to the wisdom of doing it...
My O-360 with a FP Catto cruise prop is lighter than an O-320 with a FP metal prop. This is a great combination and the only times I wish I had a CS prop is when flying formation with a lead who has a CS prop when he chops the power and all I can do is watch as I go sailing by waiting for the -9 to slow down. A good pre-flight briefing should solve that problem...
My 180+ HP -9 can easily cruise in the yellow but I typically fly it at around 150 to 155 KTS while burning 7.2 GHP. When I'm screwing around I can easily burn over 12 GPH. That is where you are going to have an issue with a 200 HP -9 because they only hold 36 gallons. You can always make tanks out of the outboard leading edges but if you do, re-read my first two paragraphs.
As for the notion that you will bump up against Vne, it isn't going to happen. (See second photo below.) Maybe at sea level you could
Remember that Vne is based on TAS.
Also, I just gotta wade in on the comment that an IO-360 parallel valve engine with 9.5:1 pistons puts out 215 hp. Sorry, but that?s all marketing fluff. Going from 8.7:1 pistons to 9.5:1 adds 35 horsepower??? I don?t think so. The IO-375 claims 205 hp, which has been confirmed on test stands. I know a very reputable engine builder with an SAE calibrated test stand who offers to test any engine with these extravagant hp promises. If it indeed does make the power they claim, no charge for the test run.
Jim Gray
RV-8 N747JG
Maybe the -9 is a better airplane for the OP's needs....I have to ask why? Why not build an RV-7 instead, an aircraft that is structurally designed for that engine...
I believe the maneuvering speed on an RV-9 is listed at 118 mph, that’s ~ 102 knots. Referring to the comment on this thread “my 180+ HP -9 can easily cruise in the yellow but I typically fly it at around 150 to 155 KTS”. From that, it seems that one would expect to normally fly in a regime at least 50 knots above “bump” speed, not a good place to be when encout even more horsepower to cruise even faster in an airplane that is not structurally designed for it? I can only assume that some people just don’t understand what maneuvering speed means....
Clipped wing 200 hp angle valve RV-9 - Building
Very true, but the comment I was referring to was.......
My Parrallel I-O360 with 9:5:1 Lycon Pistons pumped out 215HP on test