Re-Drive, 95+ HP VW Engines?

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Valley Engineering is advertising a redrive for the Great Plains 2276/80Hp that puts out 100hp at 3800 RPM.

What other companies are using ReDrives on VW engines? What kind of longevity and reliability are they seeing? What impact does raising the thrust line 6" have on handling (esp. in low wing applications)?

Are any companies offering FWF packages for the Zenith CH601/650?
 

Vigilant1

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Check this forum and the web for the experiences of Mr Wayne Clagg (start here). He's a friend of Pops and used a VW and redrive on his Zenith 701. He did everything right, IMO, and experimented responsibly. The result was alot of expense and disappointing performance.

The VW Type 1 can produce about 70-75 HP continuously, if very close attention is paid to cooling. It can produce more, briefly, for climbout, but the heads will get hot and that will reduce the overall reliability of the installation. Maybe a lot. A redrive will not allow the engine to produce more continuous HP, because the limitation is in the ability of the heads to shed heat. 70-75 HP continuous is it.

I fly behind a VW. I would not fit a VW Type 1 to a Zenith 601 or 650, with or without a redrive.
 

Vigilant1

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Are any companies offering FWF packages for the Zenith CH601/650?
If you are looking at an economical answer, I'd check with Aeromomentum for a Suzuki-based engine with a redrive. I don't know if they've got a FWF package for a Z-650, but you could check on their web site and be a test-case if not. For just the engine and redrive, the price probably won't be much different than a VW and the Valley engineering redrive, and if you need 100HP, then I think their AM13 low profile setup would be a better answer.
 

don january

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Not much for re-drive on a VW and 65HP climb out is a good goal with temps holding in the green. Times your looking at the yellow. You can push them for more ponies but the little engine was made for just so much. Type 4 can get you up the scale but best be ready to spend some "Jinggle"
 

JayKoit

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If you are looking at an economical answer, I'd check with Aeromomentum for a Suzuki-based engine with a redrive. I don't know if they've got a FWF package for a Z-650, but you could check on their web site and be a test-case if not. For just the engine and redrive, the price probably won't be much different than a VW and the Valley engineering redrive, and if you need 100HP, then I think their AM13 low profile setup would be a better answer.
Yes, Aeromomentum has FWF kits for the 601/650, and the 750. I emailed them a while back since I'm building a 601 xlb and am interested in the engine.
 

John wadman

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For what it's worth, I flew in a friends Kitfox three (two grown men) with a Revmaster 65 hp direct drive and it performed quite well once he got the right prop on it. The Kitfox is probably 40-45 lbs lighter than a stock (designed weight) CH 601-650 though. The AeroVee claims 80 hp I think.
 

Vigilant1

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The Zenith 650 has a span of 27'. It has an MTOW of 1320 lbs.
The Kitfox 3 has a 32' span. It as an MTOW of 1050 lbs. The manufacturer recommends an 80HP engine.

Though the Zenith site says engines of "80-125 HP" are suitable for the 650, the only 80HP they show is the geared, liquid-cooled Rotax 912.

Folks are free to try to use a VW with a PSRU on a Zenith 650. I think they'll have the same result that Wayne Clagg got when he used on on his Zenith 701--which Zenith701 also says can fly with a Rotax 912. Mr Clagg flew both engines in his 701, and the 912 worked well. The VW with a PSRU did not.
 

plncraze

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You are not alone. But the experienced guys say the too many folks overestimate hp.
 

Hot Wings

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But the experienced guys say the too many folks overestimate hp.
You can never overestimate hp. Kind of like you can never overestimate the size of the fish that got away............
And just like fish stories - the first lair can never win. :rolleyes:
 

Pops

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Wayne Clagg flying in and out at his grass field called "Crazy Horse". Typical flying in WV. Latter in the Video he talks about the difference in fuel burn between the VW and the Rotax 912 in the 701.
Been in my field with the VW powered 701 a couple times before going to the 912.

 

John wadman

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might want to check out the Yamaha aircraft conversions FB page.
 

Daleandee

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A redrive will not allow the engine to produce more continuous HP, because the limitation is in the ability of the heads to shed heat. 70-75 HP continuous is it.

I fly behind a VW. I would not fit a VW Type 1 to a Zenith 601 or 650, with or without a redrive.
We agree. Look at some of the trials and tribulations of Razvan Chiriac when he tried an Aerovee (Sonex VW conversion) on a Zenith 601 HD. He eventually removed it citing poor performance (among some other disturbing results):

https://www.youtube.com/user/razvan790120/videos

VW's work well when properly built and properly applied to an air frame. Preaching to the choir again ...

Dale
N319WF
 

Mike Stewart

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> "I fly behind a VW. I would not fit a VW Type 1 to a Zenith 601 or 650, with or without a redrive."

Me neither.

> "I'm somewhat skeptical of the ability of a VW to put out 95+ hp for any length of time."

Me too.
 
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