R34 Gt-T Dump Pipe Install + Feedback

[neopowered34]

Hey Guys/Girls

So last week I was checking out the exhaust setup on my R34 and it was just a simple HKS Catback, since I had ordered a turbotech boost controller I decided it would be a good idea to help the car breath better and open up the rest so I went ahead and purchased a KLS stainless steel turbo-cat dump pipe from Ebay. $235 posted. - http://www.ebay.com.au/itm/230881892110?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

There are numerous options ranging from $150 up to 600+ when purchasing this however I liked this one because a) it was reasonably priced for a stainless steel one and b) it had the 2-1 flow from at the top of the flange. I got it installed into my car today (another $200) and I wanted to share so you guys can make informed decisions on your setups.

As the guys at the shop told me the dump pipe normally adds a slight increase in boost response due to the more open flow and bolting directly onto the stock turbo this is a good for those not wanting to run an aftermarket/custom setup. On the drive home I didn't notice any power difference at all, and the sound still remains the same. The guys told me I was losing about 40% flow due to my OEM cat been nearly stuffed so with that in mind I have found a Xforce stainless steel for $195 posted. Will be ordering next paycheque to complete my full system! Hopefully, combining that with my new dump pipe it will see a slight increase, I do feel allot happier running 10psi with a much more open system. I will post results from my new cat when I get my hands on it, hopefully in a week or so....

It should be noted that the dump pipe fits fine but came up just short so the guys had to make a small bend to connect to the cat, otherwise is all ok with the OXY sensor etc. If I get a chance ill throw some pictures up tomorrow.

[GTSBoy]

Be aware that if you do not have programmable management that the boost will possibly rise when you change the cat and the car will probably go into R&R and be slow. You'll probably need to dial back the boost to get it working again.

[neopowered34]

Be aware that if you do not have programmable management that the boost will possibly rise when you change the cat and the car will probably go into R&R and be slow. You'll probably need to dial back the boost to get it working again.

Nah shouldn't rise when its on a manual boost controller and running 10psi, all I'm doing is freeing it up a bit, not really enough to worry the standard ecu. Its running very nicely as it is

[GTSBoy]

If you don't know that it will rise (and it will) you should stop playing with it.

You have to understand that if you set a manual boost controller to a given setting, then free up the exhaust, the boost level will rise.

[neopowered34]

Yeah thats ok, by freeing up the exhausts it'd be lucky to rise close to 1psi if that. Was running 7 with the catback and no MBC. Will post results when I throw the cat in and see how it responds

[Ben C34]

Yeah thats ok, by freeing up the exhausts it'd be lucky to rise close to 1psi if that. Was running 7 with the catback and no MBC. Will post results when I throw the cat in and see how it responds

What are you basing that statement on about the boost rise? I'm going to assume not from experience....... Anyway, you will soon find out.

[scotty nm35]

Higher pressure differential will bite you in the ass.

Hope you have a good boost gauge, the stock one is shite as are most of the mechanical aftermarket ones.

[Joshbigt62r]

Book it in for a tune mate. And think about getting a budget ecu at least before the tune. And as Scotty said hope your not relying on thestandard boost gauge.

[Hanaldo]

Nah shouldn't rise when its on a manual boost controller and running 10psi, all I'm doing is freeing it up a bit, not really enough to worry the standard ecu. Its running very nicely as it is

Mine rose to 12psi when I did the full turbo back exhaust. It definitely rises when you get it all breathing well.

[neopowered34]

Ran it today on the stock gauge and it was about 13psi so I've brought it back to about 10-11 according to stock gauge. I have a turbo smart gauge I could test with as well but got tired of trying to find a place in the firewall to run a hose through. If I get a tune the only mods I have are the exhaust and MBC so what would the advantage be? And I'm not really up for an expensive aftermarket computer as my next mods down the track will be a front mount and that's probably it (daily driver). Can you tune the stock ECU and do I really need to?

[GTSBoy]

Have you heard of Nistune?

[neopowered34]

Yeah I have they plug into stock ecu yeah like a piggyback? What does an average tune cost with one of those?

By biggest concern is the tune going bad, car getting idling problems, air cond not working properly or something factory not working because of aftermarket ecu.

Edited May 23, 2013 by neopowered34

[jay-rod]

Nistune will cause none of those issues your worried about.

[GTSBoy]

Not like piggyback. Replaces the original ROM chip in the ECU with a board that carries a programmable ROM and interface for doing so down the Consult bus. Cheap and simple.

[neopowered34]

Sounds like my next mod is gonna be a Nistune! What about knock sensor, I was reading a forum before saying that programmable ecu's can cause the knock sensor to fail, are there ANY downsides to putting one in that will affect the little things in my car from operating as per factory spec? And what about my inkectors they are only stock

[GTSBoy]

Nistune is the best of both worlds. You can tune the ECU to handle different injectors and air flow meters and all sorts of other changes.......but it still the factory ECU so it is perfectly happy running all the factory gear.

[Missileman]

it's also cheap, $550 with a software licence and instalation, 1k with a tune but nil licence, how much is Link, Power FC, Adaptronic?

[neopowered34]

it's also cheap, $550 with a software licence and instalation, 1k with a tune but nil licence, how much is Link, Power FC, Adaptronic?

There's a guy in Melbourne offering Supply + Fit + Tune for R34 $840!! Too bad I'm in QLD

[Missileman]

Try EFI ...

http://www.efiperformance.com.au/

Edited May 23, 2013 by Missileman

[neopowered34]

Cheers Missleman that's actually a pretty good price, will get my new cat and head off to get it done!