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Old Dec 18, 2012, 12:02 PM
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Quote:
Originally Posted by lfinney54 View Post
the 10MM carbs will work fine without a pump, but using a vp 30 is ok too, the idle needles have gone through several iterations. the long stroke 3+2 engines with Macs quiet pipe will turn a apc north of 17k , I setup one for a friend and he was sceptical of using a larger prop, we used a 12x9 apc in the end, and it was horrifically fast...so pattern is flown at half throttle and it met sound checks easily. I use 8-32 pressure taps on the 60 size motors
Lorin,

For tank position flexibility, I've been interested in running the 10 mm carb with a Perry backplate pump. I'm not sure whether these are more VP20 like or VP30 like but I've assumed it's a direct pressure feed VP30 conveniently located on the backplate - OS style.

That said, it sounds like there is no "fuel issue" combining the two. I question whether the carbs might "spit" fuel if overdriven, so to speak. Likewise with the OPS carbs and RE red Ursus and gold Super engines. OPS has both 8 (or 8.5) and 9 mm carbs.

Fact is, I intend to use these engines on a Deception (Rossi) and Arrow (OPS), respectively.

David

PS By the way, you're not saying you can get a 3+2 to turn an APC 12x9 at over 17K are you? I think Rossi suggests they can tach a 3 port two piece case old style RE at over 17K on an 11x7.5.
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Last edited by doxilia; Dec 18, 2012 at 12:08 PM.
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Old Dec 20, 2012, 09:49 PM
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Lorin,

I sent you a PM. If you have the time.

Thanks, David
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Old Dec 21, 2012, 10:20 PM
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United States, OK, Tulsa
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Hello, I've been following this thread, pretty interesting. I have a Rossi 60 FIRE black head 3+2 one piece case engine and I am wondering what prop to use on it. Are people calling this engine a long stroke?
I also have a Rossi 60 silver head side exhaust engine, is this a short stroke?
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Old Dec 22, 2012, 08:50 AM
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Pictures?
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Old Mar 05, 2013, 09:53 PM
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Better late then never. Sorry for not posting these sooner.
One is a silver head, one is a black head side exhaust and one is a black head rear exhaust. All have one piece crankcases.

I think the silver head is a short stroke. The back plate is smaller in diameter then the black heads.

The black head rear exhaust manual says it is a 3+2.

I would appreciate any information/performance that people with these engine have.

Thank you.
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Old Mar 05, 2013, 11:48 PM
Paul Pappas AMA 42520
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Thatís fine, I have been promising to post some info for monthís on another subject.
I've been watching with some interest myself on this one.


Quote:
Originally Posted by computermonkey View Post
Better late then never. Sorry for not posting these sooner.
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Old Mar 15, 2013, 11:50 PM
Kevin S. Gribben
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I have a couple of those 2 piece case RE...... they were the staple back in the day. we ran em 10 3/4 x 7 1/2

Oh memories....... they were not really sensitive to nitro, thats one memory I have.
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