ShopTalk Forums | Aircooled VW Tech & Restoration Help

Posted: **Mon Sep 26, 2005 11:16 am**

Check it out http://volksrods.com/forums/index.php?showtopic=12537 what do ya think?

Posted: **Mon Sep 26, 2005 8:04 pm**

Thats crazy that the bore centers are the same. I would never have guessed that. It seems they would be much further apart. Thats super cool.

Posted: **Mon Sep 26, 2005 11:05 pm**

the wrx engine is basically a watercooled modern version of the T1 or T5. Subaru bought the plans from vw for the T1 to alllow them to develop their wrx engine.

Posted: **Tue Sep 27, 2005 5:53 am**

WOW!!!

i guess you learn something new everyday!!!!

Posted: **Tue Sep 27, 2005 8:10 am**

One of the aircooled motorcylcle heads goes straight on the VW studs, too. Allows chain-driven overhead cams without too much work. Perhaps Yamaha?

Posted: **Tue Sep 27, 2005 12:01 pm**

That's very interesting. Is it an aircooled or watercooled head? If anyone has more info, please let us know.

Posted: **Tue Sep 27, 2005 12:16 pm**

Pablo: I've never heard that before.Type I or Type IV ?
Any more info,or a source for more ?

Thanks
Ian

Posted: **Tue Sep 27, 2005 3:45 pm**

In 1987, I saw heads from one of the Japanese air-cooled motorcycles (Yamaha, I believe) installed on a Type I. The installation appeared rather straightforward without too much fabrication. I believe the engine was for a Midget racer. 4 valves per cylinder (good low end) with great high end rev capability. Wish I'd thought of it ---

Posted: **Wed Sep 28, 2005 1:13 am**

Was it two heads from a single cylinder engine or one two cyinder head per side?

If it was a two cylinder engine there is a limited number of possible ones to choose from. Two single cyl heads with common cams can be tricky as it needs custom cams and precise alignment. I guess it can't have been a cut down four cyl head, as the pistons in such engines are usually small compared to car engines.

There is a bike shop specialized in older japanese bikes close to where I live. Perhaps they have some more info on what may fit. My best bet would be a pre-87 two cylinder 650.

edit: Just found Yamahas history pages. The TX500 is a likely candidate f it is a 4-valve head.
http://www.yamaha-motor.co.jp/global/pr ... index.html

Btw, what is the center distance between the bores and the head stud bolt pattern?

Posted: **Wed Sep 28, 2005 2:26 pm**

Its a cool idea if you have the time and the money to fab up a project , it will be one of a kind for sure. But once you have it all together will it fit into a bettle or is it race only? Cool Idea but not pratical...

Posted: **Thu Sep 29, 2005 12:25 pm**

I thought Harley heads have been used on VWs?

DOn't some of those have twin cams now?

Don

Posted: **Thu Sep 29, 2005 12:37 pm**

The CRAZY part is how much that changes the whole look of the engine!! The heads are each about the same size as the block!! Instead of a big center with smaller protrusions, it's now just.... huge!

Makes the cylinders look kinda puny, eh? It almost looks like it might need more support to the heads (beyond just the head studs)... just because of the weight. It's not THAT uncommon to strip a head stud on a NORMAL engine! Too bad the studs don't go all the way through.

- David

Posted: **Thu Sep 29, 2005 1:27 pm**

I see TWO tru-bolts on top off that case that could be used.....

You just need to support the tops anyway.

Don

Posted: **Mon Oct 03, 2005 6:26 am**

duee you are truely insane

Posted: **Mon Oct 03, 2005 7:37 am**

you know the next logical question to be asked is if this could be done to a waterboxer case and retain the water cooled cylinders.....................

(thinking outside the boxer engine lol)

Rob

ShopTalk Forums | Aircooled VW Tech & Restoration Help

WRX heads on a VW engine!

WRX heads on a VW engine!