2 1/2 exhaust

[Bax]

Today I got the car from the exhaust shop.
:D

Full 2 1/2 exhaust from the turbo flange ( downpipe, mid resonator, cat, and rear muffler).

It ran my 830 euro total.

If you remember, I was running the gtr engine with a 1.75 inch exhaust and the stock cat from the 1.6 for almost a year now.

I was running at 8 psi max and now I can hit 12.5 psi on high rpm due to the beloved boost creep.
I installed the wideband lambda sensor that I got 2 weeks ago and the pressure sensor. I could not find a bung for the EGT probe ( it was 1/8 NPT) so I'm going to search to the local performance stores to see if it can be fitted to a bung from another egt probe.

During the removal of the stock system a bolt on the stock downpipe ****ed us for a couple of hours. We had to remove the radiator to have access to the bolt (which meant we had to remove the pipe that comes off the turbo to the i/c)
The we had to unbolt a cooling line, and at the end it was damn hard to unbolt it...

We also removed the manifold heat shield and found a crack on it :S but I was told that it may not cause a problem.

So here are the pics. :D


Mid resonator and cat.



Here they are installed.



The crack :S.



The downpipe.


The back muffler and my previous mid resonator.


Back muffler installed.


The wbo2 sensor installed after the spiral and before the cat.


I'll see if I can take a video of the car to upload it.
It surely hauls ass now...

[Lex]

Looks good man, but how come you didn't go with a 3" on the GTR?

If you're running the GTR computer, you are good with boost up to ~18-19 psi.

[D323]

awesome work man.

[Bax]

Every muffler shop that I visited, told me it would be too big for the turbo. you could see benefits of the 3 inch after 280 hp. On many topics on 323gtx.co.uk I read that 3 inch would move the powerband upper in the rpm range so I chose the 2 1/2 piping. The sound would also be a lot bigger.

I think I need another pump now because on the way home, while flooring it in 3rd gear, on the higher revs I saw 13.0 a/f. I know the ecu has fuel and ingition maps for that big boost but I thing the pump that I have is from a n/a 1.8 so it seems to struggle on high rpm/high loads.

[elscotto80]

I would definitly upgrade the fuel pump. Find a walbro 255lph and you will be set.

[sfd]

that sounds about right, dealing with the powerband. i would have voted on just a bit bigger, maybe 2.5 but i cant say ****, i dont have boost.

[Lex]

it is 2.5 inch

[Bax]

Damn.. Last night I hit almost 1 bar and blew a collar.
Fortunately it didn't go totally off and could drive around. :D
I need to secure all the intake piping now.
I can't think what pressure I could hit with a 3 inch system...

[neuspeedescort]

one bar is not that big of a deal. its when you hit 20+psi then you are cooking! teh 3" wouldn't change your boost much more then the 2.5". mainly due to the fact you kept your cat. man they are a waste! its the restriction from the cat that holds people back.

NEUMAN

[MD323]

one bar is not that big of a deal. its when you hit 20+psi then you are cooking! teh 3" wouldn't change your boost much more then the 2.5". mainly due to the fact you kept your cat. man they are a waste! its the restriction from the cat that holds people back.

NEUMAN

Its the Cat that keeps that car club with the fancy lights and no sense of humor from taking your car. trust me i know this one from experience

Cops

[Protege Driver]

Congrats with your new mod. Keep the good work!!!!!!!!!!!

[sfd]

it is 2.5 inch

lol i saw 1/4 for some reason.

[BuGS]

one bar is not that big of a deal. its when you hit 20+psi then you are cooking! teh 3" wouldn't change your boost much more then the 2.5". mainly due to the fact you kept your cat. man they are a waste! its the restriction from the cat that holds people back.

NEUMAN

Seriously, it doesn't if you have a new Metal Cat. You can freaking see straight through them. THey are super high flow, you don't notice it at all. After I went from 1.6L cat to Metal cat, I started getting boost creep and spikes up to around 2-2.5 bar. It was crazy.