anybody running a homebuilt turbo conversion?

[raceman]

l`m thinking of doing a Turbo conversion on either my Kawi Z-1 or the GS. l`m not new to turbo conversions but l haven`t done a bike yet,just several cars. l have a nice little IHI turbo that will work nicely and l`ll be gathering parts during the next year before the real wrenching begins so any pics or links would be a great help at this stage. l don`t intend to re-invent the wheel or set any records,just a nicely engineered kit that reflects what l`ve learned from my previous turbo conversions.My last conversion job was a Porsche 911 and l took that from 250HP to 375HP on just 8psi of boost.The car is an absolute rocket at only 2200 lbs and 375hp! l`ll be looking for those 120mph roll-on wheelies with the GS and l want to see at least a 175 top end out of it.l`ll add a fairing of course:-D

[RJ]

Use the search feature. I'd venture to guess that everybody's turbo conversion is homemade on this website.

[ArttuH]

There is some info about my bike:

http://www.iki.fi/arttuh/mopo/turbo/

And ongoing "winter" overhaul project:

http://www.thegsresources.com/_forum/showthread.php?t=101698

[raceman]

ahhh,the search feature..why didn`t l think of that? That is great work Arttu,what did you do with the variable veins in the TDI turbo?

[ArttuH]

The variable vanes are controlled by simple pressure actuator so the vanes turn open when the boost rises. Not the perfect solution but works. I have planned to build electronic control for this but lets see when I have enough time for it.

[raceman]

Nice.l worked for VW when the TDI was coming out and we had a ton of those turbos around the shop,l may still have a couple that need rebuild.They have the hot side built into the ex.manifold though,how did you deal with that? and how did you solve the oiling problem,EXactly? any help greatly appreciated

[ArttuH]

My turbo was without integrated exhaust manifold so no problems with there. I think that only smaller TDI turbos are with integrated ex. manifold.

I did following modifications to the oiling system:
-GS750 oil pump gears. This increases pump speed and flow by 30%. Doesn't help much the pressure.
-Home made restrictor plug on the place of the oil pressure light switch. This restricts oil flow to the engine and passes oil to the turbo before restriction. I measured about 45 psi oil pressure on the turbo @5000 rpm, should be enough. Thanks to the uprated pump gears the oil pressure on the engine stayed at the original level or even slightly higher.
-Ordinary automotive pressure switch on the turbo feed line to control the oil light. Switch pressure is about 5 psi.
-I connected the drain line from the turbo to the oil drain plug hole on the oil pan.