Jump to content
SAU Community

Recommended Posts

Hey all

Here are my mods

3"turbo back exhaust

pod

eboost 2

fmic

Had my boost set to 14psi at xspeed. It got 239hpatw. The car felt bad when driving was getting spikes, jerking etc. I told them about it and they said it should be fine we do it at 14 on stock turbo no a/m ecu all the time. They told me my probs would be coil packs, i thought maybe but i believed it was the ecu going nuts on 14psi. So i took it back in and asked to put it down to 9psi, to there credit they did it for free as i complained from previous boost set. Well it got 270 hpatw on 9psi with no probs and a decent curve, was very please car feels wicked now. So the dyno tune notes said my car was obviously out of it turbo operating effiecncey. Now i d ont really understand this comment, as the car i got imported completely stock had 60,000 genuine kms service records and car condition to match. So i don't believ the turbo is not working properly.

What are your thoughts??

Link to comment
https://www.sau.com.au/forums/topic/218308-turbo-operating-effieciency/
Share on other sites

Operating efficiency is where the turbo reaches its airflow limit.

After that, running more boost doesn't make any more power, just more heat which in turn will hurt power.

Anyhow, whats happening to YOU is the factory ECU having a fit (nothing to do with the turbo/efficiency)

1. 14psi is silly on a stock turbo. You will kill it.

2. 10-12psi generally makes the stock ECU have a fit causing a power hole around 4000rpm and so on, and your running more than that.

Backing off to 9psi, making more power is a dead give away for the ECU fit.

But having said that, 9psi you aren't making a legit 270rwhp, that figure is inflated. It's more around 240.

The workshop telling you that they run 14psi on all R33's is a great worry. The obviously don't realise the turbo combined with that amount of boost will kill the turbo... so i'd be worried about what other basic common knowledge they don't know about - which would be enough for me to take my car elsewhere.

^^^ who... sorry but I'm not feeling that figure!

What turbo? No SAFC or similar No FPR? Upgraded coils? AFM?

On my highflow with stock ecu (mines chipped) SAFC and 14psi I made 230rwkw.... SAFC just didn't have enough tuning points to increase the boost and keep it safe.... That was a mainline dyno, with splitfires, E-01 and a Sard FPR..... FMIC etc as per the usual...

Edit: Stock injectors are what 370cc.... they would be maxxed out and thats if they are still flowing like they were when they were new.

Yes i wont be going back there, even though i said i would, i did just to get them to fix it for free. But dead set they say the its perfectly fine and they do it all the time no probs.

Anyways will be using hyperdrive when i get it tuned. I spoke to other tuners and they agree with what you said about 14psi

Thanks for the quick informative replys

i'm pretty sure guilt-toy was joking :P

theres some debate about 12psi vs 14psi on the stock turbo.

maybe we can get some actual results from those who have tried.

did it make any more meaningful power? did the turbo last? etc etc

Edited by Munkyb0y
^^^ who... sorry but I'm not feeling that figure!

What turbo? No SAFC or similar No FPR? Upgraded coils? AFM?

On my highflow with stock ecu (mines chipped) SAFC and 14psi I made 230rwkw.... SAFC just didn't have enough tuning points to increase the boost and keep it safe.... That was a mainline dyno, with splitfires, E-01 and a Sard FPR..... FMIC etc as per the usual...

Edit: Stock injectors are what 370cc.... they would be maxxed out and thats if they are still flowing like they were when they were new.

Seriously.. runs a stock rb25 computer with stock injectors. made 268rwkw or something.. I know because I ran the car up on the dyno!

Runs a GT30 and a RB30DET and a decent fuel pump and a FPR, he has tricked the computer to not go into R&R.

HP maybe but kw, no way

Yes KW. I ran it up on the dyno myself

i'm pretty sure guilt-toy was joking :P

theres some debate about 12psi vs 14psi on the stock turbo.

maybe we can get some actual results from those who have tried.

I usually like to joke about funny things... I am dead serious!

i've been running the gauntlet for a year now on 12-13 psi with an occasional spike to 15-16 on a stock turbo...

the car hits 6k very often and is well looked after. tune was done by nige @ racepace

the hks turbo is in the box waiting for time for the install

14psi = kaboom :P

12psi was run on my stock turbo... never a drama and I think Mitch (Mrmoo) who is the current owner of that turbo is still running 14psi on it..... could be a freak though or extremely lucky!! It made over 200 rwkw at the dyno day from memory.

My mate runs 16psi on his stock 32 turbo and has done so for over a year!! It cops a flogging, but still keeps going, I just think he is damn lucky!

i've been running the gauntlet for a year now on 12-13 psi with an occasional spike to 15-16 on a stock turbo...

the car hits 6k 7 days a week and is well looked after. tune was done by nige @ racepace

the hks turbo is in the box waiting for time for the install

Maybe your ecu is on ICE

Seriously.. runs a stock rb25 computer with stock injectors. made 268rwkw or something.. I know because I ran the car up on the dyno!

Runs a GT30 and a RB30DET and a decent fuel pump and a FPR, he has tricked the computer to not go into R&R.

hang on so its a 3.0L or a 25/30??? Guessing 25/30 to be running the ecu??

Still having issues re the stock ecu running that turbo and afm with no dramas with no help from a fuel computer.... guessing its running a fuel cut defender and relying on the FPR heavily .... and don't get me started on R&R :P ....

No feul cut defender. RB25/30.

The guy worked out a combination on how to skip the fuel cut & R&R.

here is a quote from his thread

For those interested in what the Std ECU can do, Guilt-Toy did some Dyno power runs for me today and results are as follows:

Dyno Dynamics Dynamometer at TurboTechnics Cardiff...

Run 1. 230rwkW at 9psi with AFR = 12.1

Run 2. 265rwkW at 11psi with AFR = 12.2

Run 3. 278 rwkW at 13 psi with AFR = 12.5

Didnt attempt any more boost...I was already happy enough!!

On Run 2 and Run 3 there was a little bit of ignition breakdown due to stock plug gap (didn't have time to regap plugs) but apart from that it was all cool...No sign of airflow cut or anything else scary

And also no-one heard the screamer pipe!!!

Will post up charts once scanned as well as Nissan Consult data...

Thanks Guilt-toy!!! Power FC master!!! and soon to be Std ECU master!!!

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

    • LOL.... a good amount of people (not all) on that continent seem to know everything and like to measure things in bananas, football fields, statue of liberties instead of the metric system lol.
    • I assume the modules are similar enough, so if you've had no issues I don't see why I would. I have tried to find a wiring diagram for the FPCM / fuel pump circuit, but I can't find it anywhere. Otherwise, I would just do some wire cutting and joining at the FPCM and give the 12 V supplied to the FPCM directly to the pump instead. If you know anyone that could help with wiring diagrams, I'd be very happy  
    • If it dies, then bypass. The task isn't difficult. I have one running on a standard R32 FPCM. That's after nearly 20 years of it running an 040, which pull substantially more current than the Walbro. They're not the same module, but I'd hope it indicates that the R33 one should be man enough for the job. I think people kill them when putting proper sized pumps on them, not these little toy pumps we're talking about here.
    • Silicone spray won't hurt anything. And if it does, that's an opportunity to put some solid steel spherical bushings in, so you can really learn what suspension noise sounds like, If you're going to try it, just spray one bush at a time, so you can work out which one is actually noisy. My best guess is that if the noise started only since putting the coilovers in, then it is just noise being transmitted up through the top mounts of the struts, and not necessarily "new" noise from bushes. But it's almost impossible to know.
    • Are you saying the 34 is SUV height, and not that we're talking about an SUV here? (because if we're talking about an SUV, you don't fix them. You just replace them when something breaks. Not worth establishing sufficient emotional connection with an SUV to warrant doing any work on one). I wouldn't jack my car up on a short little loop of 10mm steel rod poking out through a hole in the bumper bar, front or rear end. I realise that we're probably not talking about that type of loop at the front, being the one under/behind the bar on a Skyline.... but even for that one, trying to jack up on what amounts to a thin piece of steel, designed purely for withstanding a horizontal tension force, not a vertical compressive force (and so would be prone to buckling/crushing) and, my most particular bitch about it - located RIGHT AT THE EXTREME FRONT OF THE CAR, applying a load up through the radiator support panel, etc, with almost the entire mass of the car cantilevered between there and the rear wheels? Nope. Not doing that. Not on the regular. That structure out there in front of the front crossmember is not designed to carry load in the vertical direction. Not really designed to carry any load at all, really. The chassis rail that the tow point is connected to would be fine loaded in tension, as per towing. Not intended to carry the mass of the whole car, especially loaded all on one rail, with twisting and all sorts of shitty load distribution going on. No, I will happily drive up on some pieces of wood, thanks. That can only happen on driven wheels, and they are at the other end of the car, and this problem does not exist at that end of the car. And even then, I have been known to drive up on at least 1x piece of 2x8 each side at the rear, simply to reduce the amount of jack pumping necessary to get the car up high enough for the jack stands. What really really shits me about Skylines is the lack of decent places for chassis stands at either end of the car. You'd think they'd be designed into the crossmembers.
×
×
  • Create New...