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HelicopterEngines Plugs Mufflers Fuel › C-Spec pump backplate
12-16-2003 01:32 PM  14 years agoPost 1
Vinnie

rrApprentice

Miami Beach, Florida

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Can someone point me to whoever is making/selling the mounting plate for the Perry pump that goes behind the backplate of the OS C-Spec? I seem to recall some pictures but I can't find them...

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12-16-2003 02:30 PM  14 years agoPost 2
Saint728

rrProfessor

Honolulu, Hawaii

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The guys name was raptorm@n. Here is the link to his post for a Perry Pump back plate. http://runryder.com/helicopter/t680...pump+back+plate

Take Care,
Cheers, Patrick

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12-16-2003 03:05 PM  14 years agoPost 3
helinut

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Snohomish, WA

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I belive I seen them on Cyber Heli. PN CE300202A $59.99 look under wallet reachers.

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12-16-2003 03:33 PM  14 years agoPost 4
Saint728

rrProfessor

Honolulu, Hawaii

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The ones on cyberheli are not like th ones they have on the new OS C-Spec PS. Although they look almost simular and do the same thing.
I belive I seen them on Cyber Heli. PN CE3002002A $59.99
The part number for the above is supposed to be this PN CE300202A.

Take Care,
Cheers, Patrick

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12-16-2003 09:51 PM  14 years agoPost 5
rcmike

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Dickson, TN

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I recently put a pump on a 91SX-H by drilling a hole in the backplate the same size as the nipple on the pump. I then stuck the pump into the backplate and filled the space in between the pump and backplate with 30min. epoxy. I have only had two flights so far with it but it seems to be working well.

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12-17-2003 04:28 AM  14 years agoPost 6
rcmike

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Dickson, TN

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I was originally going to use the nipple and had threaded the backplate. I was trying to figure out the most secure and easy mounting so I just twisted the plastic nipple on the pump into the backplate and it fit. Then I just filled the rest with some epoxy that I thinned by heating it a little. I hope the pump doesn't go out because it will be a pain to get out. I would probably have to just buy another backplate.

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12-17-2003 06:35 AM  14 years agoPost 7
Stephen

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Hong Kong

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Back plate is too thin for good threads, kinda scary....

Stephen

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12-17-2003 06:44 AM  14 years agoPost 8
rkelder

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Portland, Oregon

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I used raptorm@n's back plate and think it looks much better than just shoving it in and using silicon.

Ray

If I throw a stick, will you leave?

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12-17-2003 03:06 PM  13 years agoPost 9
rcmike

rrVeteran

Dickson, TN

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Yeah, I would have gotten that backplate if I had seen it before I did mine. I was actually looking for the new c-spec's backplate and couldn't find one.

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12-17-2003 08:40 PM  13 years agoPost 10
Vinnie

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Miami Beach, Florida

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UGH

Thats bad news...

The conversion kit is about $250 for the parts and not available until the end of January!

Well, I have a carburetor and a standard Perry pump. I agree that if the pump is different, it will not equal a C-Spec PS but it should be better than a regular C-Spec right? I have an Extreme with a nicely broken in regular C-Spec and I want to upgrade it.

So I am installing a regular Perry pump, PS carb (the 60M), and custom backplate hopefully this will at least approximate the PS.

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12-17-2003 08:41 PM  13 years agoPost 11
Fredrik R

rrApprentice

Habo, Sweden

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DavidH, what you is saying is probably right. But I don't want to pay $250 for an upgrade that only gives 0.1hp advance over the regular C-Spec.
And I already had a pump that improved the engine. Why I did those plate was that I didn't want to put the pump on the frame. Think it looks bad to have it there. It much better looking to have it on the backplate. And you don't have to use a long housing that takes pressure form the engine with that mount.


Fredrik

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12-17-2003 10:45 PM  13 years agoPost 12
Vinnie

rrApprentice

Miami Beach, Florida

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hmm

DavidH what would happen with a stock C-Spec with a regular Perry pump and the new carburetor?

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12-17-2003 10:51 PM  13 years agoPost 13
Arjan

rrNovice

UK

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I think Fred's mount is a very good update if you want to use a pumped fuel system on a standard Cspec. Don't let you get talked into buying a $250 OS upgrade to make it equal to the Cspec PS because the pump is "special" and the head is "special" and the carburator is "special" and then all that "special" is giving you 0.1PS extra!! For a "special" price of just $250!! Curtis has been flying the OS engines with the "not special" perry pump for a long time and has proven it's reliability. Who knows the Conley modification to the perry pump is nothing more then the modification Curtis tells on his website, the new color head is just to make it look different from the standard Cspec and the return line on the new carb just to make the fuel lines easyer and remove the needle that nobody used anyway?? I'm not sure, i'm far from being an engine expert, but use a little common sense and don't always buy blindly the "special" parts which i think we have too much in this hobby!! If you need to buy a new engine go for the Cspec PS. If you have a Cspec, put on a "not special" perry pump and i don't think you will be far off.

Best regards, Arjan.

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12-17-2003 11:05 PM  13 years agoPost 14
Vinnie

rrApprentice

Miami Beach, Florida

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wow

Great advice, Arjan, thats exactly what I wanted to hear!!!

However I disagree on two things. First of all the standard C-Spec "hyperhead" is a bit bigger and doesn't fit the Fury fan shroud as well. The new blue head is a better fit. Second, the middle needle on the standard C-Spec is essential for getting a good transition, I was having power problems until I learned how to set this needle right.

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12-17-2003 11:10 PM  13 years agoPost 15
rcmike

rrVeteran

Dickson, TN

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EXACTLY!

I am not expecting mine to be just like the c-spec PS. I had just crashed my Raptor 60 at WOT and it burned up my YS 80(wish I had a tach on that thing. I bet it went over the recommended max. rpms since it streched the clutch bell out 1/4in. where the clutch shoes were). I wasn't going to rebuild it for a while because I didn't want to buy a $275+ engine. I happened to find a regular 91SX-H on tower hobbies daily sale for only $162 and I went for it. I knew that it had its share of problems and was willing to give it a chance. Like others said, I just wanted an easy way to mount the pump to the engine. I think it is much cleaner looking there. So far the engine seems to be running smooth and has more than enough power for what I am capable of so what more could I ask for?

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HelicopterEngines Plugs Mufflers Fuel › C-Spec pump backplate
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