Gtr R33 Surging At Cruise Speeds

[greggtr]

Hey Guys,

having problems with my recently rebuilt R33 GTR.

I'm running twin Garrett GT2560R GTR 400hp (-10) turbos, procams, Z32 AFM and power FC (older one).

The problem is a when I am cruising eg 60km/h or 100km/h the turbos seem to surge and it becomes pretty uncomfortable...

My mechanic is running out of ideas...

he tried re-tuning, plumb-back BOV, std AFM... but nothing changed...

I have a feeling I might need a balance pipe between the exhaust manifolds... but its a big job for a "might"

I am sure I am not the first to experience this...

Please advise..

Greg

[STAGTR]

Hey Greg,

Its been experienced before, I am having the same issues... check out my post on it:

My Turbo Shuffle Problem

Do a search for "Turbo Shuffle" or "Shuffling" and you should get some relevant hits.

I've heard balance pipes are the fix from most ppl in the know (that's if stock GTR recirc valves don't fix it). I would do that for my setup too, but the highmount "header style" manifolds and dump positions make it extremely difficult/expensive and maybe not possible to do properly.

If you can find someone to weld cast manifolds then you should be able to get a balance pipe welded into your stock manifolds (with a bit of the flexi pipe in between)...

If you are made of money, go buy the HKS manifolds with the balance pipe already installed.

Good luck, and if you do get the balance pipes, can you please let us know if they fixed the shuffling?

Cheers,

Pete

[The Bogan]

Maybe fuel pump.

[R31Nismoid]

Please search.

There are about 3 threads over the past 3 weeks on this same issue.

Also search with "GT-RS".