Gtr Twin Turbo Pipe Divider

[JD_R33]

For anyone with a GTR still running the stock twin turbo pipe that's interested - I got a mate to weld a divider into mine, just got it back today and it turned out pretty good....

If you don't know what the mod is all about, it's been fairly heavily discussed over on the UK GTR site, you can check it out here - http://www.gtr.co.uk/forum/84482-testing-m...turbo-pipe.html

They actually sell them from the shop on the UK site, but the shipping is pretty steep and you have to send them back your stock pipe.

Anyways, if anyone wants their pipe done just let me know and i'll give you my mate's workshop details.

Don't know if he's the cheapest around, but I do know he's a perfectionist and the welds are sweet and the cut for the dividing plate is in exactly the right place, apparently took him about 2 1/2 hours.

[R31Nismoid]

Interesting mod...

I have some issues though with the thread.

1. No idea how they work out 10whp gains, that borders on the impossible to measure.

2. The graphs are done "by eye", so point 1 even more relevant. Easy to see where 10whp comes from, its all guesswork.

3. But then he didnt "race a flow bench", so why is he racing dynos?

4. Then they go on to compare 2.8ltr strokers results vs 2.6... on what i can only assume is eye plotted graphs again.

Silly thread in terms of actual testing. It's all "seat of the pants". Conjecture in my books.

They also talk a lot about surging in that thread, so it would seem tuners over there don't know what tuners over here do...

Not many people have surge issues in strokers & GT-RS in Aus. No-one has any issue with surge on -5's either. So whatever they are doing over there is causing their surge problems if over here nobody has any drama's.

Let us know what you think/find after swapping it out though. Im skeptical to say the least at this stage.

[JD_R33]

Yeah, I laughed at some of the science in that thread too, but linked it in more to explain why they are doing the mod.

Just looking at the way the flow from the turbos comes together at almost 90 degrees in the stock pipe compared to how it looks with the divider, it isn't hard to imagine some gain though, even if only a relatively small one.

I don't know if i'll bother putting it on now though, as I am about to put in a new set of turbos, injectors etc along with a retune, and will probably just swap the pipe over at the same time.