Power products h58

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Robert Ruf
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Power products h58

Post by Robert Ruf » Tue Mar 06, 2018 9:54 pm

Whos the go to person for getting port work done? I have what I believe is a go power dual carb intake I want to run on it. Any help is welcome.

Rob Voska
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Re: Power products h58

Post by Rob Voska » Wed Mar 07, 2018 7:20 am

Plan on using a girdle to keep a ported cylinder together. PP's were noted for "loosing their heads" if modified very much. Palmini made heads with bosses for the studs and lots of home made designs also to sandwich them together.

You can run the dual manifold on a stock ported cylinder. With that manifold I would run small carbs because it's a low RPM engine. More than a 580 WB but less than a Mac.

One of the best running pp58's I have seen was Rick Browns.

Robert Ruf
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Re: Power products h58

Post by Robert Ruf » Wed Mar 07, 2018 4:33 pm

I was planning on running a couple hl66a carbs. So basically clean up the stock porting,high compression head and run it?

Rob Voska
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Re: Power products h58

Post by Rob Voska » Thu Mar 08, 2018 7:10 am

Those cylinders are very light weight. They are only secured at the bottom. Between heat, thermal expansion, vibration, harmonics, high compression, karting related stresses (it's own set of vibrations, bumps etc....) and hanging out there unsupported is OK for a low RPM chain saw but not so great for a high RPM kart engine.

Really look at the bottom of one of those cylinders...... not much meat there.

If it was me I would either run stock compression or if I had a fancy high compression head I would plan on a girdle.

Parts are just to hard to come by. If you blow the cylinder off your taking at least the rod and piston along with it. It might just crack & give you some engine related trouble but why take the chance.

Bobby Muha down in Alabama (I think) does a lot of PP stuff. He is in the Parts and Resources section. He knows a lot more about them than I do.

ted johnson
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Re: Power products h58

Post by ted johnson » Thu Mar 08, 2018 7:56 am

The later PP-58's had much more meat, both on the cylinder transfer passage area and in the crankcase, than did the older versions. Power Products listened to the karters and improved these engines incrementally. The crankcase screws got stronger, too. Jack Canady in Mo. knows all the history and has built some wicked PP's. If the engine is one which had three engine mount studs on the power take off side of the case rather than four, it's definitely early. Either PM me, or contact Jack, Bobby Muha or Hank Rotroff for more info. Ted

Robert Ruf
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Re: Power products h58

Post by Robert Ruf » Thu Mar 08, 2018 10:16 pm

Rob,Ted thanks for the reply. I don't want to sling parts all over the place so I'll be using a girdle.

Rick Brown
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Re: Power products h58

Post by Rick Brown » Tue Mar 27, 2018 8:08 pm

Hi Robert my name is Rick Brown and I was wondering if you ever got things going for your 58? Sorry I'm so late in a reply, but if you need any help contact me. Rick Brown

Robert Ruf
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Re: Power products h58

Post by Robert Ruf » Mon Apr 02, 2018 9:02 pm

Thanks to everyone who replied, the conversation I had with Mr Rick Brown was enlightening. It reinforced what I already thought was correct and opened my eyes to what should be done. Thanks Rick, I'll be in touch again.

Robert Ruf
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HiRe: Power products h58

Post by Robert Ruf » Mon May 28, 2018 12:55 am

I think the pics came through

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