easiest way to build a downpipe on a mk1 car is to install a VNT on it, then there is only 2 90* bends needed,
Where did you get the flange for the VNT?
made it, crudely torch cut (with an extremely dirty, worn out torch tip) some steel, and then i layed it on my surface grinder to true it up a tad bit. then i use cut up a Mitsubishi G54B exhaust manifold gasket for the turbo gasket, just cut the mitsu gasket into 4 pieces, then you got 4 exhaust gaskets! nothing special, but my downpipe has worked fine for as ling as ive had it on the car. it cracked one time, but then i reinforced it way good.. thought about building a mount to the block for it.
easiest way to build a downpipe on a mk1 car is to install a VNT on it, then there is only 2 90* bends needed, one directing the exhaust down, and one directing it back..
(lol 
)
Right im gonna trade my K03 turbo and manifold for anyone with a vnt-15! any offers?!
PLEASE
vnt-15's can be had for pretty cheap over on tdiclub.
my vnt was a VERY good price, FREE!
I had a good one off of my tdi but i sold it for 300 to help with the vnt 17/22
I built a down pipe for my sons 16V ABA turbo conversion project (ok hold on - its relavant)
I bought mandrel bends for that from
http://www.mandrel-bends.comThey have a lot on their website and also were very helpful on the phone
They have silicon connectors and elbows too.
And I find their prices to be reasonable
The problems I encountered there were fitting things so they wouldnt interfere with the shift linkage
I had a good one off of my tdi but i sold it for 300 to help with the vnt 17/22
too bad you didnt keep it for the jetta, would have been the turbo to have, or just take the 17/22 off your TDi! lol...
Here's my cheapy 2.5" exhaust. I took an original Mk1 exhaust piece belown the toilet bowl flange local NAPA muffler guy to use as a template.
He cut off the flange and mad this piece for me:
This is before the flange was fully welded.
Then I just pieced together the rest of the exhaust with off-the-shelf slip on 2.5" pipes and ran two mufflers in series. One cheap muffler and a Borla is got off CL. Spent a total of about $170.
[/IMG]http://farm5.static.flickr.com/4085/5008011955_9ba99b99cd_z.jpg[/IMG]
Is it a bad idea to keep the stock 1.6TD cast iron downpipe with the toilet bowl flange? It didn't seem to be restrictive to me and of course it's sturdy.
Haha! i sold that turbo before i got my TD. Or else i would have keep it! i dont know how/where i would run the vacuum hose for the VNT actuator
plus im not trying to make my TD a racer
I already have a car for that "TDI"
lol
I had a good one off of my tdi but i sold it for 300 to help with the vnt 17/22
too bad you didnt keep it for the jetta, would have been the turbo to have, or just take the 17/22 off your TDi! lol...
Don't limit your thinking to 2.5 inch, when it comes to getting rid of diesel exhaust, bigger is better. I was able to fit a 3 inch off the turbo. Faster spool-up and lower EGT's .
Cheers,
-JB
Haha! i sold that turbo before i got my TD. Or else i would have keep it! i dont know how/where i would run the vacuum hose for the VNT actuator
plus im not trying to make my TD a racer I already have a car for that "TDI" lol
I had a good one off of my tdi but i sold it for 300 to help with the vnt 17/22
too bad you didnt keep it for the jetta, would have been the turbo to have, or just take the 17/22 off your TDi! lol...
i never hooked up the vain control.. most people used linkages hooked to the injection pump throttle lever.. even with no vain control, it still spooled like a MOFO..
YOu can find a lot of decent mandrell bends at most exhaust shops. A lot of cutting and welding, and putting it on and taking it off. I think Im just gonna buy one next time.