How big is too big?

[GoLfMan]

down the track i want to let the Pogo breathe a little easier.
how big is too big an exhaust (turbo back)?
i was thinking 2.75" turbo back.

thoughts?

[Preen59]

4 inch is probably too big... :wasntme:

[gldgti]

its not much engine (1.9l) and not too much high rev's boost to warrant more than about 3". 2.75 will be exxy, since the size is less common. 2.5" will be big enough and much easier - hence cheaper - to fab.

:-D

[GoLfMan]

its not much engine (1.9l) and not too much high rev's boost to warrant more than about 3". 2.75 will be exxy, since the size is less common. 2.5" will be big enough and much easier - hence cheaper - to fab.

:-D

sounds good mate thanks for that :)

i can get metal straight from the source basically and at a good price through my TAFE. I'm very tempted to go stainless and will definately go mandrel bent and i will flange it in 3 spots like my mk1 for ease of removability :)

[cetane]

G'day, Josh.

Don't forget the air going in, too. I just fitted a pod filter (K&N) to my Landrover Discovery Tdi and the difference is phenomonal! She just breathes easier overall, but it's most noticeable when the turbo is on boost (as you would expect). A nice bonus is being able to hear the whistle of the turbo quite clearly so you know when it's spooling up and on boost. Surprisingly, there's no noise penalty as induction roar. When my TDI is out of warranty it'll be the first mod that I do ;-)

http://www.vwwatercooled.com.au/forums/

(Sorry asbout the non-VW pic you guys...Moderators, feel free to delete.)

[gldgti]

(Sorry asbout the non-VW pic you guys...Moderators, feel free to delete.)

its got a VAG engine - good enough for me ;-)

[gldgti]

sounds good mate thanks for that :)

i can get metal straight from the source basically and at a good price through my TAFE. I'm very tempted to go stainless and will definately go mandrel bent and i will flange it in 3 spots like my mk1 for ease of removability :)

please please dont waste your money on stainless..... its realyl not going to be worth the extra cost.... diesel exhausts just dont deteriorate like petrol ones do, since theres always so much gas flow (no throttle) water never condenses in there... so unless your going with stacks :-) just use mild steel.

just my advice

[GoLfMan]

G'day, Josh.

Don't forget the air going in, too. I just fitted a pod filter (K&N) to my Landrover Discovery Tdi and the difference is phenomonal! She just breathes easier overall, but it's most noticeable when the turbo is on boost (as you would expect). A nice bonus is being able to hear the whistle of the turbo quite clearly so you know when it's spooling up and on boost. Surprisingly, there's no noise penalty as induction roar. When my TDI is out of warranty it'll be the first mod that I do ;-)

gday cetane!
i've already done the intake, not a pod filter but a Seat intake and later on will get myself a K&N :) it was noticably smoother when i fitted a new intake not just have to make the other end breathe just as well!!!! :D

[GoLfMan]

please please dont waste your money on stainless..... its realyl not going to be worth the extra cost.... diesel exhausts just dont deteriorate like petrol ones do, since theres always so much gas flow (no throttle) water never condenses in there... so unless your going with stacks :-) just use mild steel.

just my advice

good to know, im just newish to the diesel game so i didnt know this fact :)
in that case ill get mild steel! ill price up 2.75" and 2.5" piping and if the difference is massive ill get the 2.5 but if its just a little bit more ill fork out and get the bigger stuff :)

more than likely however ill just get the 2.5", ill do cat back first then a dump pipe.

[cetane]

please please dont waste your money on stainless..... its realyl not going to be worth the extra cost.... diesel exhausts just dont deteriorate like petrol ones do, since theres always so much gas flow (no throttle) water never condenses in there... so unless your going with stacks :-) just use mild steel.

just my advice
And mine too!

Over 40 years of diesel ownership and I have NEVER had to replace any part of an exhaust system :-) and Ayden.. Part of the reason is the layer of carbon that forms on the inside and protects the metal from corrosion ;-)

[GoLfMan]

thanks fellas :D always good to learn new things!

[gldgti]

Part of the reason is the layer of carbon that forms on the inside and protects the metal from corrosion ;-)

Indeed!

either way its a sure bet ;-)

I have a workmate in the exhaust bis, supplies mufflers for busses with 1,000,000 km warranty.... never ever had one come back. nothing stainless used. only come back whne people crash into the bus and wreck the exhaust ;-)

[GoLfMan]

Indeed!

either way its a sure bet ;-)

I have a workmate in the exhaust bis, supplies mufflers for busses with 1,000,000 km warranty.... never ever had one come back. nothing stainless used. only come back whne people crash into the bus and wreck the exhaust ;-)

how much does he charge for a full system?

and is it MANDREL bent?

[gldgti]

hahaha...

pm me.... but its in sydders. yep, mandrel bent indeed.