turbo back opinions

[volvic]

hey,

i've been toying with the idea for months now and last night i spent most of my time browsing videos of people that have chopped the rear box for straight pipes(mufflertoc...somthing or other).

as most of my driving is city start stop revs usually stay between 1 to 2k.
is the turbo back option loud between these revs? i wouldnt mind if it got loud after say 2.5k but anything below i'd want quiet....

my car currently has a piper rs downpipe(no silencer) and jabba remap...

so should i go for a turbo back system or turbo to rear box like i have now but less restrictive...

cheers!

(current system: Piper RS downpipe (no silencer) going to standard rear box)

 

[jonjay]

I have a Milltek DP and a Milltek Center Silencer and on full beans it does sound loud. Normal driving however its very civilised.

You essentially have got a turbo back system already Volvic. I would just get backbox and the remaining pipes to the DP. Should sound quite nice

 

[brad1]

As jonjay said, get something like a milltek non res cat back

 

[jonjay]

As jonjay said, get something like a milltek non res cat back

Or piper

 

[jonjay]

What my car sounds like on full chat.

http://s150.photobucket.com/albums/s107/pro-bee/?action=view&current=MVI_1706.flv

 

[volvic]

What my car sounds like on full chat.

http://s150.photobucket.com/albums/s107/pro-bee/?action=view&current=MVI_1706.flv

thanks Jon! i'll give that a bash when i get out of work.

i've booked myself in for a custom jobbie this friday... how to explain this to the miss

 

[Ultra_Joel88]

IMO you need a box there somewhere.

I have decat with a sports backbox (about 1/2 the size of the original) and its quiet when cruising when loud when booting it.

 

[jonjay]

IMO you need a box there somewhere.

I have decat with a sports backbox (about 1/2 the size of the original) and its quiet when cruising when loud when booting it.

Yep agreed hence i went with the miltek centre silencer instead of their backbox.

 

[dannyFR+tdi]

I have a milltek turbo back and it doesnt sound too loud at motorway and town driving speeds

 

[volvic]

have a dyno before and after.... im well excited now... like a child at christmas!!!

 

[cocadave]

have a dyno before and after.... im well excited now... like a child at christmas!!!

Volvic, please post results of before and after dyno runs, i had a turbo back miltek system fitted on friday and also had before and after dyno runs, quite disapointed with results to be honest, pulled 191 before and 194 after (at clutch)

Also a bit gutted that the sound isn't too noticable, originaly i was going to have the muflerectomy but was strongly advised against this as it would be silly loud

I went for the large bore down pipe, decat non res centre section and the rear box, initially there wasn't very much difference in sound at all but, over the last few days i think it has "opened up" a little and now does seem to growl a bit more after 3K.

To be honest i think i am going to get a straight through rear pipe made up to give it the grunt that diesels lack .

Just thought i'd share my experience.

 

[Andrewcupra TDI]

i have the milltek full system, resonated as i travel motorways mostly + my little nipper often comes with me , so didnt want droaning noises again like my old car ,

the res option is pretty much standard noise but makes a difference, slightly deeper note , and on full pelt

 

[glynnd]

Volvic, please post results of before and after dyno runs, i had a turbo back miltek system fitted on friday and also had before and after dyno runs, quite disapointed with results to be honest, pulled 191 before and 194 after (at clutch)

Also a bit gutted that the sound isn't too noticable, originaly i was going to have the muflerectomy but was strongly advised against this as it would be silly loud

I went for the large bore down pipe, decat non res centre section and the rear box, initially there wasn't very much difference in sound at all but, over the last few days i think it has "opened up" a little and now does seem to growl a bit more after 3K.

To be honest i think i am going to get a straight through rear pipe made up to give it the grunt that diesels lack .

Just thought i'd share my experience.

Do this if you dont mind noise!
I have a magnex with decat which leaves only the rear silencer, its very vocal at full throttle above 2500rpm
Glynn

 

[Ultra_Joel88]

^ Absolutely.

I would imagine that the noise would be unbearable with a decat and no rear box.

Its loud enough with sports rear box and decat IMO.

Any louder would just sound like a sadact.

 

[volvic]

i got a vortex system done, 196bhp at the fly before and 198 after iirc

however the torque jumped by 20ft lbs!!!! i've noticed the jump too, can really feel it

will post up graphs once i've scanned them

 

[glynnd]

^ Absolutely.

I would imagine that the noise would be unbearable with a decat and no rear box.

Its loud enough with sports rear box and decat IMO.

Any louder would just sound like a sadact.

Its not that bad actually. It quietens off after 3000rpm but low down has a reall growl to it.
I overtook the wife and she descibed it as similar to an RS4!!!
Glynn

 

[volvic]

well finally some graphs. i really like the noise of the exhaust. i posted up some videos previously of petrol ones and it got mixed reviews but i really wanted it. being on a diesel its very quiet.... apart from starting it theres a burble then it goes silent. only at around 2.5k can you hear the roar.

i'll try and get some sound clips when i get my car back!! these figures are with the turbo making a siren noise


before: Jabba generic map, piper downpipe (non-res) standard system from downpipe to rear box

after: Jabba generic map, piper downpipe (non-res) torque exhaust custom downpipe to vortex exhaust

 

[ChrisGTL]

Nice gains of torque there mate and 1.2 more horses......they all count!!

Do you have any graphs of pre piper downpipe?

 

[jonjay]

thats one fast stage 1 tdi.

Your getting a lot more power over the range now.

 

[volvic]

no pre downpipe graphs

the car feels very rapid, a lot of people have mistaken it for the petrol version.