Any experience with 80mm cylinders for 36hp?

Bengt H · Posted: Mon Jun 09, 2014 3:59 am Post subject:

Outside dia is 84mm on a stock cylinder that makes 2mm wall thicknes.... no "slip in" for me.

pig-pen · Posted: Mon Jun 09, 2014 6:46 am Post subject:

yes that sounds more like it... the stock hole in a case is 84mm right? with a 3.5mm wall on the stock cylinders. Or have I got that totally wrong?

tobiasax · Posted: Mon Jun 09, 2014 7:36 am Post subject:

Kjell Roar · Posted: Mon Jun 09, 2014 9:20 am Post subject:

I have a big-bore cylinderbank for an old Honda CB500 Four (from 498 up to 591ccm with 61mm bore), I measured 1,3 mm walls. That was thin!
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Peter_Plade · Posted: Mon Jun 09, 2014 12:27 pm Post subject:

I wrote to aircooled.net and asked about these cylinders. Here is their reply:

Hello Peter,
I was passed this email this weekend and answered it before I arrived to work today. I was unfamiliar with this product, but very familiar with 36hp engines and when I read that we were selling "slip-in" 80mm cylinders, I was a little shocked. I got out my calculator and, with a little math, found that, if we did have 80mm slip ins, the cylinder wall would be less than 2mm thick at the top which prompted my first email saying that it might not be a good idea.

When I got into work I started looking into what the story was on this. Apparently one of our new ladies inputting products into the catalog has made a mistake. These are not a "slip-in" version. They do require machining.

If you are able to do machining, this WILL be a great option because the cylinder walls ARE still thick. If you are looking to bolt something on, this is probably not what you need.
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Bengt H · Posted: Mon Jun 09, 2014 2:45 pm Post subject:

PANZERVW · Posted: Mon Jun 09, 2014 8:13 pm Post subject:

As I read the discription on this product will it really be that easy of an install item for what is described as quick HP?

RareAir · Posted: Mon Jun 09, 2014 8:15 pm Post subject:

Looks like they are now Out of Stock Crying or Very sad

So who were the lucky ones that grabbed a set?

http://vwparts.aircooled.net/80mm-Piston-Cylinder-Set-36hp-Slip-In-1286cc-p/vw8000t36.htm
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Peter_Plade · Posted: Fri Jun 13, 2014 12:18 pm Post subject:

Apparently no one did, as the last email I got from the stated that they properly wouldn't have them in stock ready to sell before the end of the year.
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mark tucker · Posted: Sat Jun 14, 2014 7:39 am Post subject:

one day I will get one of these 36ers and see what you guys are talking about.and make it biger better badder.....or just to look at. 356/912 had 85 or 86mm cylinders so why not for the 36?just wondering from a 2332+ guy.

djway3474 · Posted: Thu Jun 26, 2014 10:51 am Post subject:

I asked the AA guys about these sets at the Classic last weekend. They don't exist. The gentleman said he had some calls about them recently and did not know how the rumor got started. I mentioned the advert referenced earlier.
He did say though that if the demand was there that they would make them. He did feel that this segment of the market seemed to be showing a greater interest lately so time will tell.

henry roberts · Posted: Thu Jun 26, 2014 3:12 pm Post subject:

pig-pen · Posted: Sun Jul 27, 2014 11:26 pm Post subject:

not connected to the title, but thought it would be a waste of space to start a new thread...

I have found some oversize japanese 78.5mm pistons with 38mm comp height... (but annoyingly they are 22mm pin)

this would leave me with 1.75mm wall at case end and 2.75mm at head using stock 36hp barrels.

does this sound ok? enough?

Smile

Bengt H · Posted: Mon Jul 28, 2014 12:36 am Post subject:

I Think its a bit too thin, the factory had 78mm as the biggest oversice and even they are thin.

pig-pen · Posted: Mon Jul 28, 2014 1:05 am Post subject:

dammit! thought you might say that.

pig-pen · Posted: Mon Jul 28, 2014 6:03 am Post subject:

ok, so here is another question...

AA are now listing the cylinders as 356 / 36hp (not slip in) which makes more sense, but there are no pistons.

What are people using for 80mm pistons? I know the porsche will work but only with porsche rods right? due to lower compression height?

I have found some more Japanese pistons which are 80mm bore / 20mm pin / 36mm CH.

So 2mm short of the 36hp 38mm CH... would I be able to make these work?

Question

pig-pen · Posted: Mon Jul 28, 2014 6:10 am Post subject:

hmmm... so not wanting to dribble on...

but will 36mm CH work just nice with a 69.5 crank giving almost a stock width engine???

or have I got that totally wrong?

TomSimon · Samba Member Joined: January 13, 2004 Posts: 751

Anyone who has played with race engines knows this: One of the things that makes building old, period correct hot-rod engines so darn frustrating is the lack of performance parts, reliable information about fitment, and reliable delivery dates of new performance parts.

For information about these 80mm P&C kits from AA, I'd email AA's general manager and VP of sales Ron Barrett directly to get the straight scoop...

[email protected]

Mr. Okrasa · Posted: Sun Aug 24, 2014 11:39 pm Post subject:


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Any experience with 80mm cylinders for 36hp?
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