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Engine Specific Info and Questions => IDI Engine => Topic started by: Patrick on September 27, 2005, 05:22:12 pm

Title: Tailpipe fell off today!
Post by: Patrick on September 27, 2005, 05:22:12 pm

As a result I pulled the rotten muffler and replaced it with 18" of exhaust pipe, and put the tailpipe back on. (local garage is a buddy of mine and has a bender/expander). There's already no resonator on this car, so my exhaust is now straight through. Not loud at all! Seems to have more "oomph" now, and I can hear a little more turbo, but it's not a lot. Highly recommended! (Thought I'd try it after all I've read here).

Title: Tailpipe fell off today!
Post by: Maarten on September 28, 2005, 12:42:58 am

One good thing it to mention that you have a TD.. if you take all the mufflers away from a normal diesel you be a 'bit' louder than with mufflers ;)

Title: Tailpipe fell off today!
Post by: jtanguay on September 28, 2005, 03:11:40 am

Partly due to the fact that the turbo is considered a 'muffling' device :)

I heard its bad if the turbo has no back pressure though.   Is this true?

Title: Tailpipe fell off today!
Post by: Maarten on September 28, 2005, 03:30:28 am

The turbo does not need backpressure on the exhaust side... the better flowing exhaust the faster it will spool.

The turbo needs a certain amount of backpressure on the intakeside, else it would overspin and die, too much and it will surge.

Title: Tailpipe fell off today!
Post by: Patrick on September 28, 2005, 05:02:24 am

I knew that turbo's make pretty good muffler's at least in theory. Car isn't loud by any stretch of the imagination, there is just a hair more turbo whistle, but not near as much as a garrett on a 1.6 with full factory exhaust. BTW this car is a 92 Jetta with a 1.9 idi TD.Very happy with the car. When the exhaust is history, it WILL be upsized to probably 2 1/2", but I'm leaving what's there alone for now. Haven't touched the fueling or boost, although it may have been toyed with before I got it. Seal is still there on max fuel screw. Not touching fuel until I install a pyrometer and boost guage! Had some "catastrophic failures" on other stuff in the past! :lol:

Title: Tailpipe fell off today!
Post by: Maarten on September 28, 2005, 05:41:45 am

the turbo on your 1.9TD AAZ is a KKK K14 or Garrett T2, those are much smaller than the 1.6TD's Garrett T3 or KKK K24...

I've got a KKK K24 on my 1.9TD with 70mm downpipe (gonna weld a 60mm exhaust next week) it whistles loudly every time I have fun  :lol: