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Engine Specific Info and Questions => IDI Engine => Topic started by: 2mAn on November 02, 2006, 03:08:01 pm
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Techtonics Tuning 2.25" DP $275
(http://www.techtonicstuning.com/images/parts/251.224.jpg)
"This Downpipe fits the factory MkI and MkII Turbo Diesels in a MkI Chassis. 2.25" Stainless tubing will fit tt 2.25" exhaust. Also comes with custom short shift kit."
www.techtonicstuning.com
OR
Passenger Performance 2.5" DP $200
(http://www.passengerdiesel.com/catalog/images/PICT0004.JPG)
"Quality TIG-welded 2.5" downpipe for your MK1 (model year 1984 or earlier, including Rabbits) 1.6L TD with factory Garrett and Borg Warner KKK turbos. Reduces backpressure, decreases EGT, improves turbo spool up time. We recommend upgrading the rest of the exhaust to 2.5" for the best possible performance. The downpipe includes a flex pipe."
www.passengerdiesel.com
took all that info directly from the websites. im going to be swapping in a 1.6TD in my mk1 coupe in a few weeks and when i do it, id like to add a downpipe and exhaust at the same time. to me it seems like a clear decision, but id like some input from people who have actually used these products.... discuss....
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Havent used either of these products, but the PP downpipe looks like the better deal. The only thing I'm confused about is connecting it to the rest of the exhaust system with that funny looking flange at the end of the downpipe. Seems like it would've made more sense to extend it a bit and use a slip/collar fitting like the TT pipe.
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Call it biased but I'll add a few comments on my downpipes
The passenger downpipe has these advantages:
2.5" diameter, better flow, lower egts, quicker spoolup.
Wide radius bend right off the turbo, notice how the TT pipe is much like the factory version and quickly bends down immediately after the turbine outlet, this is not good for flow and creates extra back pressure, egts, and slows turbo spooling. The passenger pipe helps lower egts and makes for quicker spool up with its wide radius bend..
No need for a short shifter (although there is nothing wrong with adding a short shifter)
I have a flange on the end of the flex joint and another identical flange is included with the downpipe to weld to your exhaust, this makes the downpipe a quick bolt in, bolt out affair, I really hate slip joint fittings, this way you have 4 bolts and you can remove it and install it with ease. :D
I have heard (just read on forums, no personal experience) that TT pipes are prone to cracking. I have not had a single downpipe failure that I have been made aware of to this date.
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The PP Downpipe looks sexier too. :wink: :lol:
Andrew
I can sell you a piece of sch40 pipe as a package deal to beat off the ladies :lol:
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The PP downpipe has a larger diameter, what looks like better flow and is cheaper. Add ceramic coating and it's still 10$ cheaper than the TT downpipe.
Oh and shipping will probably be cheaper since the PP product isn't as bulky.
I don't own either of the two but just because they are in Canada I'd personally go with PP.
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is the pipe stainless or aluminzied?
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Is TT in USD and PP in CAD?
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I bought and installed the PP 2.5 downpipe on my 1.6 eco diesel. I highly recommend it, well worth the money spent.
Doug
92eco soon to be a "real TD"
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The TT Down Pipe has the brackets for the support to the Exhaust Manifold, the PP Pipe does not include this.
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Hey Dave,
would you do a DP without the flange, and a hunk of streight pipe to do a slip joint.
I do not have the same distain for slip joints that you have. I find that if i slot the outside pipe of the joint, use copper antisieze, and clamp until the joint doesn't move, but not so tight that it crushes the pipe, I can easily undo them later, even after driving in winter on salted roads. Don't forget to gob the pipe clamps with antisieze too.
I really don't like cutting rusty bolts on flanges of exhauste systems.
To each his own, i guess.
Might be in the market for a DP for my 1.5TD winter rabbit project pritty soon.
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The TT Down Pipe has the brackets for the support to the Exhaust Manifold, the PP Pipe does not include this.
There is no need for a bracket, if a downpipe is properly welded there is no way under normal operating uses it will crack/break. I can literally hang one of my downpipes from the rafters in my shop and hang from the pipe and give it a good shake, no cracking, bending or breaking. And I havent had a single failure. TT's are known to crack at the flange.
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Is TT in USD and PP in CAD?
My site has both CAD and USD, the $200 here for this downpipe is USD.
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is the pipe stainless or aluminzied?
Neither, its mild steel, if you are worried about corrosion get the ceramic coating, it drops under hood temps, resists corrosion and looks great.
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Hey Dave,
would you do a DP without the flange, and a hunk of streight pipe to do a slip joint.
I do not have the same distain for slip joints that you have. I find that if i slot the outside pipe of the joint, use copper antisieze, and clamp until the joint doesn't move, but not so tight that it crushes the pipe, I can easily undo them later, even after driving in winter on salted roads. Don't forget to gob the pipe clamps with antisieze too.
I really don't like cutting rusty bolts on flanges of exhauste systems.
To each his own, i guess.
Might be in the market for a DP for my 1.5TD winter rabbit project pritty soon.
You could use that same copper antisieze for the bolts as well, thats what I do, I just like the quick and easy installation, you can remove the downpipe in under 5 minutes. But yes I could leave the flange off of the end of the flex joint and weld on a straight piece for you.
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how long would it take to get a ceramic coated pipe to seattle? ill order before monday if it can get here in time
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Here's the one on my 1.6TD Bunnytruck. It's a PP pipe and connects to a 2.25" system with a Magnaflow muffler (custom bent by a local shop). The quality and performance improvement are both fantastic.
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_3316.jpg)
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how long would it take to get a ceramic coated pipe to seattle? ill order before monday if it can get here in time
I can send one to the ceramic coater on monday, should be back on wednesday, so it will get shipped out before the end of the week, so you will see it early the week after this.
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nice youll probably see an order from me soon... thanks everyone
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If you want one ceramic coated ASAP, let me know so I can send it to the coater's on monday, I don't usually keep the ceramic coated ones in stock.
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stewardc love to see more pics of the caddy..especially the headlight/air cleaner area also pics of the fuel filter bracket.
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Nice looking truck! Is that a G60 valvecover? What breather setup is that you're running? Sorry for the hijack...the downpipes look great.
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Nice looking truck! Is that a G60 valvecover? What breather setup is that you're running? Sorry for the hijack...the downpipes look great.
Yes, that is a powdercoated G-60 cover and a homemade vent system with a stainless pot scrubber pushed into the Valve cover end of the tube.
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I've bought two Jetta TD's in the last couple years where the support bracket was missing or the bolts missing and the Turbo Center sections were cracked in half right at the place where the Turban Housing secures to the Center Section. I have to believe this is due to lack of support.
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I've bought two Jetta TD's in the last couple years where the support bracket was missing or the bolts missing and the Turbo Center sections were cracked in half right at the place where the Turban Housing secures to the Center Section. I have to believe this is due to lack of support.
Nope not from that, the center section recieves no torque from the downpipe, its on the otherside of the turbine, there is no pressure on it.
There is absolutely ZERO need for a support bracket for a properly welded downpipe made from 18g or thicker material (mine are made from 16g) I have had zero cracks or failures from my downpipes.
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I'm convinced.
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Heres some comparison shots between the passenger a1 downpipe, and the stock unit. Note the smooth wide radius bends.
(http://i94.photobucket.com/albums/l83/935racer/IMG_5327.jpg)
(http://i94.photobucket.com/albums/l83/935racer/IMG_5328.jpg)
(http://i94.photobucket.com/albums/l83/935racer/IMG_5329.jpg)
(http://i94.photobucket.com/albums/l83/935racer/IMG_5330.jpg)
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nice pics!
just ordered mine today, cant wait to get it