R&D Tuned Pipe

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Posted

There is a guy on ebay with what he calls an R&D Tuned Pipe for the 582 and he claims it makes 80 hp at 5800rpm, Is this true and does anybody know who R&D company is, I cant seem to find them.

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They were around a long time. I've never heard anything but bad things about the way they make a 582 run. Peaky power, chasing EGTs, things of that nature. If your only planning to run wide open all the time I imagine it would work pretty good. The boring Rotax muffler design prevents the 2-stroke from "coming on the pipe" like a dirt bike or snowmobile. This makes operating the engine in the mid range possible.

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Posted

There is a guy on ebay with what he calls an R&D Tuned Pipe for the 582 and he claims it makes 80 hp at 5800rpm, Is this true and does anybody know who R&D company is, I cant seem to find them.

R&D's doors were closed many years ago in the late 90's. They made Tuned Pipes for Sleds, also Rotax's used on Airplanes, and even Jet Skies I think. Yes, they made (3) different 582UL Tuned Pipes, and No, not every Tuned Pipe is great. Many People have Opinions on Tuned Pipes, but have never really flown behind one. Some Actual Dyno Numbers of the Stock 582UL, and with their (3) different Tuned Pipes. Dump those Actual Dyno Numbers into an Excel Spreadsheet and then Graph the Power Band.

On a Perfect, Good Tuned Pipe, you should be able to draw a Straight Line from Idle(2000rpm) to the Max Rpm it's Design for. It should be making making HP till a little past it's Designed Max Rpm, usualy;y 150-200rpm. You want a Wide Power Band with No Dead Spots, Blips in the Power Band.

Stock 582UL with Rotax Exhaust. Max 64.7hp@6250rpm!

http://www.rotaxservices.com/dyno.html#2

5 82UL with R&D 582 - 1 Tuned Pipe. Max 80.7hp@6500rpm!

http://www.rotaxservices.com/dyno.html#3

582UL with R&D 582 - 2 Tuned Pipe. Max 77.5hp@6500rpm!

http://www.rotaxservices.com/dyno.html#4

582UL with R&D - 3 Tuned Pipe. Max 75.6hp@6000rpm!

http://www.rotaxservices.com/dyno.html#5

Here is a 2004 380HO(A 377 with 11.2cr vs Std. 377 9.6cr) Twin with a fairly decent after market Tuned Pipe. No Large Blips or Dead Spots in the Power Band. Stock 380HO was rated 48hp@7000rpm. Notice it still made 52hp@6500rpm with the after Market Tuned Pipe. Stock 377UL was 35hp@6500rpm! Most Rotax's and other 2 Strokes used on Planes are used in the 4000rpm to 6500rpm Range.

Stock 582UL with Rotax Exhaust, Dyno Numbers! You can See that even the Stock Engines Power Band isn't Perfect. Mufflers can be to Restrictive, Carbs to Small, Cylinder & Case Porting casuing Turbulence. Without having the Case & Cylinders Ported for better Airflow, a Tuned Pipe can Multiply the already Stock Bad Power Band. Case & Cylinder Porting can add 10-15% more over all Power. So Stock 64.7hp +10% = 6.47hp + 64.7hp = 71.2hp.

RPM  HP
3500 21.0hp
4000 27.3hp  +6.3hp  +500rpm
4500 31.9hp  +4.6hp  +500rpm
4750 38.6hp  +6.7hp  +250rpm
5000 44.3hp  +5.7hp  +250rpm
5250 49.4hp  +5.1hp  +250rpm
5500 54.8hp  +5.4hp  +250rpm
5750 58.0hp  +8.6hp  +250rpm
6000 62.4hp  +4.4hp  +250rpm  <--- Staring to make less HP! Probably to Restrictive Exhaust, and Porting, maybe even Carbs!
6250 64.7hp  +2.0hp  +250rpm
6500 63.9hp   -0.8hp   +250rpm  <---- Loosing Power even with rpm Increase!
6750 60.6hp   -4.1hp  +250rpm
7000 57.2hp   -7.5hp  +250rpm

 

 

 

380HO 57.26hp at 7000.jpg

380HO 2004 AD 48HP.jpg

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Posted

Armilite, There are 7 columns and 5 headings, what's missing?

data.jpg

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Posted

Armilite, There are 7 columns and 5 headings, what's missing?

data.jpg

I Think, 1st Column = RPM, 2nd & 3rd = Fuel Flow/HR, 4th & 5th = B.S.F.C., 6th = CORR HP, 7th = Torque. I'm guessing 2&3 and 4&5 Metric/American.

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