Turbo exhaust

[boxer246]

I'm putting a 1.6TD in a caddy and will be building (or probably having someone build) a 2.5 exhaust front to back.  My question is, what muffler(s) would you recommend for keeping good flow, while providing decent noise abatement?  I'm not interested in the bellowing noisy sound like my buddy's Chevy Duramax has (he has a 5 inch from the turbo back)....To be honest the quieter the better.  But I want it to flow good too.  Should I use a "pre" muffler like they did originally on the diesels then a normal muffler in the rear?  

Also, where would a flex tubing section be better served....in the downpipe going down or after it makes the 90 degree turn towards the rear?

[blkboostedtruck]

well i can answer this! i'm running a resonator and thats it! the turbo cuts down noise alot!
a 2.5 pipe all the way back will do? wont be loud much!
or if your concerned about having a muffler on ? use a magna flo or something simulare?
 my caddy will have 2 side pipes with resonators just for a little back pressure! once i have time to finish it!
thanks Duane

[hillfolk'r]

i dont even use a muffler,its pretty quiet
id put the flex after  the bend ,,like "stock"
even a glasspack would tone it down if you need
2.5 inch pipe is fine
i get my own bends at summit,and weld my  o wn  systems

[boxer246]

Yeah I was going to get a few bends from Summit to weld up the downpipe and put a flex coupler in, but then just have a shop do the rest.  Summit aslo has some generic "turbo" mufflers for a good price, they look decent, I thought maybe one of those would work OK.  
So I probably wont bother with the glasspack or pre-muffler, just do a turbo muffler at the rear.
THanks for the thoughts guys.

[stewardc]

On my Caddy, I ran 2.25 to the biggest Magnaflow I could fit under it, then out to a nice stainless Magnaflow tip. 2.5 is a bit big for the chassis, IMHO.
The flex on mine is here;

[boxer246]

Nice downpipe!!  Looks sweet.  Did you have it Jet-Hot coated or something or is that just hi-temp paint?  How does it sound?  Why do you say 2.5 is a bit big for the chassis?  Too hard to make the bends or what?

[jtanguay]

Nice downpipe!!  Looks sweet.  Did you have it Jet-Hot coated or something or is that just hi-temp paint?  How does it sound?  Why do you say 2.5 is a bit big for the chassis?  Too hard to make the bends or what?

935racer is/was making these.  he switched to 3" but not sure if he's making either anymore... they are costly to produce and as it seems, people complain about the 'high' price for this kind of quality  :roll:

[stewardc]

Nice downpipe!!  Looks sweet.  Did you have it Jet-Hot coated or something or is that just hi-temp paint?  How does it sound?  Why do you say 2.5 is a bit big for the chassis?  Too hard to make the bends or what?

This is Ceramichromed and it is sweeeeet. I tried the 2.5" but the chassis was so tight that we went with 2.25" instead. It makes for a very neat system and works very nice indeed.

[fastvicar]

I am running a 3" straight-through system now.  I had been @ 2.5" but it didn't look ridiculous enough as a side pipe.  The 3" has less turbo whistle at idle  :cry:  but more at full-throttle   .  The 2.5" was louder and raspier at higher rpm.

[Baselyne]

HOW COULD PEOPLE COMPLAIN ABOUT THE PRICE OF THAT QUALITY?

THOSE ARE DEFONATLY SOMETHING TO HAVE...
everytime i see that downpipe I get depressed to think my poor engines egt
this is the key to a modded vw so im told.

keep making dope parts PP
props,
-base

[TedV]

I made a 2.5" flange to 3" downpipe for my 78 Scirocco.  Purchased the flange and SS mandrel bent pipe.  I'll confirm what the guys at PP said when I called to see if they had downpipe for a MK1.  3" on a Mk1 is a biotch!  A 16V Scirocco shift arm will give you a little more room tho.  I put the flex under the car right behind the steering rack after the 90, more room for it there.  Worked ok for my ABA-16V turbo.  I reused the 2.5" side exit pipe from the ABA-16V-T but haven't got the 1.6TD running yet, so can't say about noise level. Still some more wiring to do.   The chassis harness was shot. :x

2.5" pipe and no mufflers sounds good on a 98 TDi tho

[spencebm]

straight pipes 4 life!

[boostin]

good flowing pipes are a must when it comes to performance, on this we all agree, if you want performance with less roll and rumble while lifting the throttle (my wife does not enjoy that, as do some of us) may i suggest looking into Dr Gas Spintech mufflers. I have used them on many vehicles, and really enjoy the quiet while cruising...but lean into the throttle and a smile always shows up.
I imagine there are some that are always listening to the sounds your car makes. ( i can't help it, it's in the blood i think).
Your motor will make a very distinct sound with this muffler and i enjoy mine, with every note!!
The price is as good as the sound....(spintechmuffler.com)

[speedy]

I just used an OEM style muffler.  As others have mentioned, it will not be very loud even with no muffler but I wanted OEM quiet and I got it just with this single muffler.  I installed the flex coupling in the bottom portion but I'm still not sure whether that was the correct choice or not.

Pictures of my exhaust system are here (it is on a van):

http://motorheads.net/vw/turbobus/page4.html

-David

[Op-Ivy]

I take it that flex fit thing eliminated the doughnut type thing? This might be something to think about considering I can't get mine to seal....