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Engine Specific Info and Questions => IDI Engine => Topic started by: smokin_fun on July 06, 2008, 12:00:53 pm

Title: turbo downpipe
Post by: smokin_fun on July 06, 2008, 12:00:53 pm

hey i"ve got a 92 td jetta with  a t3 and i am looking for a downpipe for it.
I have heard that i will get minimum gains from swapping out the stock DP
becuse no matter what pipe i get it will have to have a constriction in it so the turbo won't stall..ie a 2.5 in. pipe must neck down to 2in. or less before opening into my 2.5" exhaust therefore making anything larger than a 2" exhaust unnecessary. is this correct? would a 3" dp necked down to 2.5" work.
 i currently am running a rebuilt 1.6td with metal HG, and a giles super pump, but i need more flow. I also just saw a 2.25" td DP for mk1's on the techtonics tuning website(part#251.224)...would that work with my MK2?
BTW giles you rule; this pump is the ***!!!! ANYONE who is thinking of getting one, DEFINITELY do it!

Title: turbo downpipe
Post by: gigaz2 on July 06, 2008, 01:50:16 pm

why would you want any kind of restriction after the turbo??

Title: turbo downpipe
Post by: dillenger1 on July 06, 2008, 01:52:59 pm

for velocity

Title: turbo downpipe
Post by: Fisher on July 06, 2008, 09:05:57 pm

I use a 2.25" Stainless Downpipe from Techtonics Tuning on my 1.6 TD in a Mk1 Jetta.  Works very well and fits perfectly.  I think it'll work in the Mk2 also.

Call them, they're very helpful, very good service and lightning fast shipping.

Title: turbo downpipe
Post by: VW_Commuter on July 06, 2008, 09:17:18 pm

Fisher, are you still running the stock exhaust elbow off of the turbo or does your downpipe bolt directly to the turbo?

Greg

Title: turbo downpipe
Post by: Fisher on July 06, 2008, 11:56:40 pm

The Down Pipe bolts directly to the Turbo.  Complete TT Exhaust from the Turbo to the Rear, small Resonator with no Muffler.

Exhaust system comes with a Muffler but I had them make a Pipe to replace it.  Nice setup.

Title: turbo downpipe
Post by: VW_Commuter on July 07, 2008, 05:25:31 am

What did that run Fisher?  Do you have the part numbers or was it a one off deal?

Title: turbo downpipe
Post by: Fisher on July 07, 2008, 08:24:39 am

I think it was about $480 complete.  Can't remember the part number for the Cat Back system but they'll know when you talk to them.

SS 2.25" Down Pipe, and 2.25" Cat Back system, bolted right up.  Parts off the shelf, next day delivery.