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NeilsenRM(at)comcast.net
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 Posted: Thu Aug 02, 2007 6:42 am Post subject: VW Update |
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While I was at Oshkosh I had considerable discussions with the Kolb guys. They are excited about the new option of VWs on the MKIIIC and extra. The new engine mount offered by Kolb will make it much easer for people to put VW engines on Kolbs. It will still be fairly involved due to things like exhaust systems that will need to be custom built. The major benefit is and always was reduced cost with performance about like a 80HP 912. VW engines (new long blocks) can be had for $2000-$4000 depending on how much you do and parts selection. This will allow you to build a engine package at a considerable savings over a Rotax 912. I estimate the full engine package will be around $5,000-$6,000. Note! The Kolb mount is designed for VW engines that have the Valley Redrive (series 2 or 3) where the prop is mounted on the pulley end of the VW. A side note is that this mount will work with some minor changes to mount GEO engines and some other engines that need space for oil sumps.
As of today I have 11 hours on the new Valley series 3 Redrive. The new drive is very smooth from 700 RPM idle to 3700+. There is some wear on the belts as I see some residue on the engine after flying but the Valley Guys report 100+ hours and the belts still look good. Also the wear indicator shows no movement. I will keep you up to date.
Again I will caution you the VW is still in some what of a testing phase on Kolbs so if you fly over inhospitable country you will want to 912 series Rotax on your plane.
Also The Valley Series 3 redrive requires a one inch centering hole in the prop. The hole is necessary to access the redrive mounting bolt.
Rick Neilsen
Redrive VW Powered MKIIIC
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Rick Lewis
Joined: 03 Jul 2007
Posts: 122
Location: Kingston, Tn.
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| Posted: Mon Aug 13, 2007 2:43 am Post subject: Re: VW Update |
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Your right, the Kolb people are excited about the posibility of the VW engine being used on the Plane. They made the jig off the vw engine block I took to them and have already made and power coated my cage. I will be picking things up probably tomorrow. My engine parts are trickling in slowly. I will be using the water cooled heads and light weight cylinders. It looks like my total engin cost will be around 7000.
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