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Old 02-14-2011, 12:45 PM
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Homemade turbo for a VW Beetle?

My '71 has the 1600 engine. Has anyone done this, and what did you do? Or are there any websites specific to doing this? Thanks!

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Old 02-14-2011, 02:52 PM
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Hi,

A long time ago, a guy I worked with in a shop had a turbo bug. Check out Hugh MacInnes Turbochargers (HP Books #49). It actually has pictures of old kits to get a good idea.

The mechanic that built it was always working on it. As I recall, it was a draw through with a Weber 45DCOE. The issues were- heat, oil return, and exhaust plumbing that was constantly leaking or over heating.

If you're going to try it, go low boost, check the rotating assembly carefully and make it robust, and get an auxillary oil cooling system. The bugs hate oil anyway, with a turbo it will be only worse, with foaming and heat breakdown.

Good luck!

Matt
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Old 02-15-2011, 08:36 AM
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As noted go with a cooler and an accusump, it REALLY makes a difference. I prefer blow through style to draw through, but as long as you set up the carb and turbo correctly either can work- intercooling is easier on blow through though.

Depending on your intended power levels I would go with a TD04 or TD05 style of turbo, a large TD05 can take you up to 500hp, but I don't think you want to go that big. A small 16G with a 6 or 7 cm turbine housing would probably be about right, it would have some lag on an engine that small, but not much and can support 300hp. For a turbo header you can basically modify a stinger exhaust.

You'll also need a good electric fuel pump, some sort of wastegate (internal would be fine for this IMO), intercooler or water injection, and PROPERLY MODIFIED fuel system.

If you're good at fabrication you could probably build a decent system along the lines of what I outlined for a little under a grand.
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Old 02-15-2011, 09:11 AM
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Haven't done this, but I thought about getting an old bug to hotrod. You should check out "Hot VW's" magazine. maybe they have a website too. About a year ago they had an awesome turbo bug. The turbo was mounted where the muffler usually goes and the guy hid the intercooler so it looked stock. I've seen some where it's mounted up high and then you have no engine cover or it has to be raised or modified.
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