R32 Gtr Not Going Past Stock Boost

[SiR_RB]

i recently fitted an aftermarket stainless steel front pipe and 3" high flow cat to my existing 3.5" cat-back exhaust.

i thought while the exhaust is more "free flowing" il remove the boost restrictor thats inside the hose with the yellow band. i took out the little brass thing, took it for a run and its not showing an increase in boost, its exactly where the boost gauage used to sit before !

any ideas why this is happening? its a puzzle to me...

also i followed to see where the 2 hoses from the solenoid go and i lost them under the plenum, so i followed the wastegate hoses and they go into steel pipes, travel behind the engine then i guess meet up with the hoses?

i also blew air through the hose which had the restrictor in it and i could hear some leaking air/hissing sound from the back under the plenum? is this a prob?

thanks fellas !

[99 GTT]

hey why don't you just spend a few hundred dollars and fit a good boost controller and get a dyno tune.

1. Get a power figure.

2. Will continue to be the same power.

3 Won't blow up etc. (will cost more if that happens)

4. You get 2 or more boost settings.

5 Peace of mind that it is not leaning out etc......

Just an idea..

Good luck..

[PROXIMITY]

Also if the line was leaking it would be running alot more boost than it should not cool, and that restrictor brings on boost quiker i have found.

Maybe your wastegates are faulty ?

But yes on a gtr i would have a decent EBC

[SiR_RB]

profec b will be coming real soon, prob next month, that should sort everything out

thanks

[STATUS]

the line you blew into is t'd under the plenum and one goes to the gates and to the the rear most vacuum fitting on the plenum and thats the "leak" you would have heard. Nothing to worry about.

[JD_R33]

What Trent said.

I had a diagram of the RB26 boost lines somewhere, but can't find it now. You can see it in this thread:

http://www.skylinesaustralia.com/forums/Si...-G-t305576.html

[guricha]

Actually have same problem with removed restrictor boost not passing more then 0.6 bar, before it was around 0.8 bar cant figure out the problem:(

[choco]

I've just done the same. I was only running 0.6 bar so I removed my restrictor and still only running 0.6bar. Apart from the 2 vacuum lines, does you PCM have anything else connected? Behind where the bottom hose, the one that contained the restrictor, attaches feels like there's an electrical connection but nothing is connected. Does yours?

I also read one post somewhere that someone was saying if you reduce the restrictor diameter, opposite of removing it, it increases boost.

Cheers,

Allan

[panzer]

My 32 did the same thing, had the restrictor out but was running a solid 10.5 psi.

never found out what i was and i now run a evc6 anyway.