Jump to content
SAU Community

Recommended Posts

That's a lot of money difference so you would expect an equal difference in what you get out of it.

I have a GCG highflow on mine with around 230rwkw at around 0.85 bar. Just sorting out some tuning issues at the moment but it's safe to say that there is more in it turbo wise.

I think it's worth pointing out here that an R34 turbo has a larger exhaust housing than an r33 or r32 one so that might make a difference when they are highflowed.

That's a lot of money difference so you would expect an equal difference in what you get out of it.

I have a GCG highflow on mine with around 230rwkw at around 0.85 bar.  Just sorting out some tuning issues at the moment but it's safe to say that there is more in it turbo wise.

I think it's worth pointing out here that an R34 turbo has a larger exhaust housing than an r33 or r32 one so that might make a difference when they are highflowed.

judgeing from your results you diddnt go the poncams with the turbo upgrade.Did you get a adj exh cam wheel?

great hi-flow.

When does teh garret 2535 come onto boost in the rev range compared to the hi-flow?I found there are 2 versions of it 1 in a 350hp and another in a 370hp version.

:ufo:

What about those GT28RS "disco potato" turbos? From what I have read they blow harder then the GT2530, but spool up is only marginally slower. There are also very cheap: horsepowerinabox.com is running a special through Nissan Silvia for about $1400 IIRC (no idea what flange though).

LW.

judgeing from your results you diddnt go the poncams with the turbo upgrade.Did you get a adj exh cam wheel?

great hi-flow.

When does teh garret 2535 come onto boost in the rev range compared to the hi-flow?I found there are 2 versions of it 1 in a 350hp and another in a 370hp version.

I don't know for sure but I'd be willing to bet that only one of those is a T3 flange.

I didn't go the cams yet although I'd like to.

R34 GTT's don't respond well to adjustable exhaust cam wheels. They are not necessary.

The r33 and r34 turbos are near identical dude...

Yes its safe to say ur turbo has alot more in it considering ur only running 12psi!!

You can expect over 240rwkw with some more boost easily!

I have put a series 2 r33 turbo and my r34 turbo next to each other so I know they are not identical. I started a thread about it on here somewhere.

I have put a series 2 r33 turbo and my r34 turbo next to each other so I know they are not identical.  I started a thread about it on here somewhere.

I have seen 2 different R33 GTST S2 turbos, one was made by Garrett (Air Research) and the other by Hitachi. All of the R34GTT turbos I have seen were made by Hitachi. All of the R33 GTST S1 and R32GTST turbos I have seen were made by Garrett.:P

  • 2 weeks later...

I know the thread is now 10 days old so dun shoot me

But for an rb20, what would be the better turbo? Considering id probably want to push slightly past 300rwhp (say 320ish) but wouldnt want an rb25 b/b 450hp GCG turbo if it was majorly laggy on an rb20!

I know the thread is now 10 days old so dun shoot me

But for an rb20, what would be the better turbo? Considering id probably want to push slightly past 300rwhp (say 320ish) but wouldnt want an rb25 b/b 450hp GCG turbo if it was majorly laggy on an rb20!

I don't find the RB25DET GCG ball bearing hi flow at all laggy on the RB20DET. The throtle response is very good, but it does have an excellent exhaust (split dump, 3.52" exhaust, no cat) and is tuned for response via a Power FC. :D

Lots of questions......

The cost is because it utilises a brand new ball bearing core, not plain bearing. A lot of the hi flows rebuild the standard core with plain bearings. Plus it is micro balanced on the latest Schenk and only brand new parts are used. The best part is it works, I have used them on many cars, so have plenty of others and they NEVER fail to perform, I have seen plenty of others that don't. So they aren't expensive, they are cheap.

Depending on load, full boost of 1.2 bar at 3,200 rpm all the way to 8,200 rpm. The turbo will efficiently make more boost than that, but the engine is old and I needed it to last. Well at least until the new RB31DET is finished.

Mods for 225 rwkw ........... combo spilt dump, engine pipe and cat replacement (all in one piece) and 3.25" exhaust. Power FC with Boost Control Kit, RX7 injectors, POD, substantial air feed, heat shield, GTR fuel pump, PWR radiator, electric fan, oil cooler with ducting, remote oil filter, GTR intercooler, my own intercooler pipework, Jun adj camshaft pulleys and tuning. Lots of tuning, for response, I don't care about max power at one rpm point, we went for the best average power.

Hope that clarifies:cheers:

Are the rx7 injectors a straight fit onto rb25's? Someone menthioned that the spray pattern from them are different, can anyone confirm this.

The cheap RB25 upgrade is JDM manual S15 side feed high impedance injectors, good for around 450 bhp.

Spray pattern :confused: I am getting a bit peed off with some of the crap written about spray patterns on forums. I have tried about 20 different injector styles/brands/flow rates in all sizes of RB's over the last 5 years or so, and I will be buggered if I can find stuff all difference in power, economy or emmisions. Tuning makes more difference than injector spray paterns, if you are going to spend more money, then spend it on getting the tune right.:rofl:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I guess one thing that might be wrong is the manifold pressure.  It is a constant -5.9 and never moves even under 100% throttle and load.  I would expect it to atleast go to 0 correct?  It's doing this with the OEM MAP as well as the ECU vacuum sensor. When trying to tune the base map under load the crosshairs only climb vertically with RPM, but always in the -5.9 column.
    • AHHHH gotchaa, I'll do that once I am home again. I tried doing the harness with the multimeter but it seems the car needed a jump, there was no power when it was in the "ON" position. Not sure if I should use car battery jump starter or if its because the stuff that has been disconnect the car just does send power.
    • As far as I can tell I have everything properly set in the Haltech software for engine size, injector data, all sensors seem to be reporting proper numbers.  If I change any injector details it doesnt run right.    Changing the base map is having the biggest change in response, im not sure how people are saying it doesnt really matter.  I'm guessing under normal conditions the ECU is able to self adjust and keep everything smooth.   Right now my best performance is happening by lowering the base map just enough to where the ECU us doing short term cut of about 45% to reach the target Lambda of 14.7.  That way when I start putting load on it still has high enough fuel map to not be so lean.  After 2500 rpm I raised the base map to what would be really rich at no load, but still helps with the lean spots on load.  I figure I don't have much reason to be above 2500rpm with no load.  When watching other videos it seems their target is reached much faster than mine.  Mine takes forever to adjust and reach the target. My next few days will be spent making sure timing is good, it was running fine before doing the ECU and DBW swap, but want to verify.  I'll also probably swap in the new injectors I bought as well as a walbro 255 pump.  
    • It would be different if the sealant hadn't started to peel up with gaps in the glue about ~6cm and bigger in some areas. I would much prefer not having to do the work take them off the car . However, the filler the owner put in the roof rack mount cavities has shrunk and begun to crack on the rail delete panels. I cant trust that to hold off moisture ingress especially where I live. Not only that but I have faded paint on as well as on either side of these panels, so they would need to come off to give the roofline a proper respray. My goal is to get in there and put a healthy amount of epoxy instead of panel filler/bog and potentially skin with carbon fiber. I have 2 spare rolls from an old motorcycle fairing project from a few years back and I think it'd be a nice touch on a black stag.  I've seen some threads where people replace their roof rack delete with a welded in sheet metal part. But has anyone re-worked the roof rails themselves? It seems like there is a lot of volume there to add in some threads and maybe a keyway for a quick(er) release roof rack system. Not afraid to mill something out if I have to. It would be cool to have a cross bar only setup. That way I can keep the sleek roofline that would accept a couple bolts to gain back that extra utility  3D print some snazzy covers to hide the threaded section to be thorough and keep things covered when not using the rack. 
    • Probably not. A workshop grade scantool is my go to for proper Consult interrogation. Any workshop grade tool should do it. Just go to a workshop.
×
×
  • Create New...