80mm exhaust on my T4 2.5 TDI

[pjbplumbing@bigpond.com]

Hi there,
Had the bulk of my original exhaust removed last week and a straight through 80mm exhaust fitted from the cat back. With 2x straight through mufflers, no baffles.
Results, after sorting out a rattle; it seems to accelerate easier up hills, not much change internally from exhaust noise.
My long term plan is to eventually get LPG fitted also, which will benifit from the larger exhaust.
Oh, and a DP chip to be fitted next week also.
Will do some photos when posssible.
Peter

[GoLfMan]

sounds great mate, pics would be awesome i wanna do the exhaust on my TDI soon aswell, good to know there's results

[pjbplumbing@bigpond.com]

As usual

As usual, the thread has gone totally off track...
I was talking about a larger exhaust, as it is common knowledge that a turbo diesel works better with an open exhaust.
But silly me mentioned a chip and woah...off we went on a side track about who has epromed a better chip and so on...?
oh well... we could talk all night about mapping and 3 demensional programing but hey..
As the gals would say...bigger is better.
Peter

[GoLfMan]

have you got any photos of it mate? i want to do an exhaust for my TDI polo and i tossing up between 2 3/4" or 3"

[Greg Roles]

Great to hear that the old wives tale of a turbo diesel not really needing a lot of muffling is true. Also good to hear it's assisting boosting!

[mollins]

good stuff with the free flowing exhaust. Good to hear you took the risk of noisyness going straight through and it has paid off.
The turbo evens out much of the pulsing and pressure waves which make a heap of the usual noise. great work.

[pjbplumbing@bigpond.com]

photo's

Golfman,
Yeah photo's would be good;
I will try and do a few 2morrow, but my partner is away and she has taken the good camera - all I have at the mo is a toy camera that comes with my phone... I 'll try it and see...get it ..see ??? oh dear!

Yeah I had heard the turbo on a diesel cuts the noise down, and it would seem that it is true. I had asked that the 80mm go all the way to the turbo but was told to leave the cat in position and go from there; so there is about 600mm of original german pipe between cat and turbo.
The DP wizz-banger is worth $1300 big ones, but what appeals to me is:
A/ easy to fit
B/ Motor can be easly returned to original condition
C/ DP has some adustment - fine tuning
D/ I think it may be made in Australia?


From what I know of the ECU board fitted by the Krauts, the factory chip is soldered to the board.
I had thought about removing the original chip and fitting a chip socket to the circuit board - then it would be easy to just plug & play with different chips.
But I havent.
Peter

[Logzy]

Golfman,
Yeah photo's would be good;
I will try and do a few 2morrow, but my partner is away and she has taken the good camera - all I have at the mo is a toy camera that comes with my phone... I 'll try it and see...get it ..see ??? oh dear!

Yeah I had heard the turbo on a diesel cuts the noise down, and it would seem that it is true. I had asked that the 80mm go all the way to the turbo but was told to leave the cat in position and go from there; so there is about 600mm of original german pipe between cat and turbo.
The DP wizz-banger is worth $1300 big ones, but what appeals to me is:
A/ easy to fit
B/ Motor can be easly returned to original condition
C/ DP has some adustment - fine tuning
D/ I think it may be made in Australia?


From what I know of the ECU board fitted by the Krauts, the factory chip is soldered to the board.
I had thought about removing the original chip and fitting a chip socket to the circuit board - then it would be easy to just plug & play with different chips.
But I havent.
Peter

DP is not made in Australia.
Actually changing the chip on the ECU motherboard is old skool and in 99.9% of cases is no longer done or required.
These days the chip is "flashed" with new data.
Can i suggest you do some googling and reading.
At the price you've been quoted for the DP box I'd seriously shop around, if this is the way youre going to go then id be very surprised if you couldnt get it cheaper.
Only trying to help, its your choice.
Cheers.

[gldgti]

Hey Everyone!

i thought this thread was about exhaust, not chips. i dont care much for chips, they make you fat.

its not fair to wreck someone elses thread by chiming in about chips. feel free to clean up your own posts out of respect for the original thread starter unless you feel they are truly significant.

Great stuff with the exhaust mate, if nothing else it'll keep the EGT's lower which is happy days.

I just installed EGT gauge in the mk3 and am happy to report i havnt managed to get it over 550deg, even though i'm running more fuel and 18psi now.

so you have put yourself in a good position for more power later!

[Greg Roles]

So how about the price of oil today, geez!

[Seano]

Peter....I'd like to hear more about the exhaust system you've had fitted. Was it a custom bend or off the shelf? Was the OEM system toasted/rusted or did you just want to do it for kicks? How much did it set you back?

And like the G-man......I too would love to see some photos.

I'm not particularily interested in chips........never struck me as good bang for buck. Except for the seller/trader.

[pjbplumbing@bigpond.com]

Photos

Here are a few shots of the new exhaust system.
You have no idea what pain and suffering I had to endure getting these from my Telstra ZTE phone? What a piece of garbage.
The whole thing fitted cost $650.00. It was a total custom job, made-up from various bends and mufflers. Mufflers are straight through jobs. The original system was fine. I wanted to free up the Turbo and gain some kW's, and maybe some ltr/100?
As I said earlier, the original cause was to prepare for LPG addition which I hope one day to afford..after I have sold my wife and cut-off my left arm.
I believe the original exhaust is a legacy from petrol motors - in other words, factory fits same to either motor? I see no other reason why such an elaborate system is fitted to a TDI? Not needed.

[GoLfMan]

nice one mate i wanna do that to my Polo TDI, its only got a 2" factory exhaust

[Seano]

Nick work, Peter.

Biggest bummer with my exhaust is the whacking great loop that is required so the pipe clears the T4 syncro driveline out the back....makes a mockery of free flow!!

[pjbplumbing@bigpond.com]

Seano,
Has your van got side windows that open? If not you could exit the exhuast out the side in front of the rear wheel - cool man.
2 door golfs could do ditto.