Jump to content
SAU Community

Recommended Posts

We normally use the Garrett Big can actuators which is rated upto 23psi. We can also modify your turbine housing so your boost curve hold flate to 7000RPM.

The ceramic turbine wheel is my only concern. It might breaks off under heat and pressure just like the OEM turbos do.

  • Replies 53
  • Created
  • Last Reply

Top Posters In This Topic

Car is now boosting alot earlier due to finding

a couple of boost leaks.One was found by myself which was an intercooler pipe joiner being loose and the other one was found by Daniel at Elite Racing developements when i took it to him this morning.Car feels much livelier and more like i anticipated when buying the turbo.After the leak was fixed we took it for a drive and the clutch didn't like the extra torque and started to shit itself.So one problem fixed and one to fix as soon as possible.All in all very happy! As for what Rad32 said about a steel wheel version i think it might be cause my mechanic said that the compressor wheel had markings on it which were still quite fresh which indicated it had recently been rebuilt and balanced.But i wont be able to test its limits until i can afford to put bigger injectors and AFM on it.So thanks to every one for their input in helping me with my teething problems as i wouldn't have known where to look without this forum.Thumbs up to SAU. :P

  • 2 months later...

Bringing this back alive just to add that the wastegate on these turbos is adjustable stock (screw fitted arm). I got mine from Darrynspencer on here - adjusted to 9psi then put a boost controller on it (ID3) and tuned at 11, 13 and 15psi (above 13psi boost drops off at the top end a little).

Full boost (15psi) at 3500rpm on the dyno and road when tuned, made 227rwkw. But boost was dropping off to just under 14psi. I think I could wind another 2 turns on the actuator to get ~11psi without controller and fix some of that pressure drop off, set controller to run 16psi and probably max out at 240rwkw.

i had one of these turbos on my s14 (but a p20 version) and it was laggy ish but it is a big turbo a p25 is rated at 550-600hp i vaguely remember so lag is kinda expected but urs looks a lil too much, i dont have a dyno sheet handy but i gave the turbo to my best mate when i sold the car stock so ill see if he has a printout somewhere

i had one of these turbos on my s14 (but a p20 version) and it was laggy ish but it is a big turbo a p25 is rated at 550-600hp i vaguely remember so lag is kinda expected but urs looks a lil too much, i dont have a dyno sheet handy but i gave the turbo to my best mate when i sold the car stock so ill see if he has a printout somewhere

SR20's use a AX53B60, not what we are talking about here

AX53B70 P25's are rated at 380hp not 550-600hp

yeh, after adjusting the wastegate actuator i am getting 16 psi by 3400rpm.I found that my actuator does not control boost level but controls how fast peak boost is achieved . Without the bleed valve connected i reached a peak boost of 12 psi.Cheers.

  • 1 month later...

ECR-033, at 18psi I think you are over-boosting that turbo.

Better to drop a couple of psi and be happy with 230rwkw than blow the rear wheel off. I doubt that extra 2 psi is giving you much power anyway. I make 227rwkw at 15psi mid-range (dropping to 14psi up high).

4th gear with ebc = full-boost at 3300rpm (1 bar), 7psi at 2800rpm.

Skylinatic, your midrange torque is amazingly similar to mine at ~520Nm calculated flywheel. I doubt you'll get much more out of the turbo though, maybe another 10hp or 20 max.

Edited by simpletool
ECR-033, at 18psi I think you are over-boosting that turbo.

Better to drop a couple of psi and be happy with 230rwkw than blow the rear wheel off. I doubt that extra 2 psi is giving you much power anyway. I make 227rwkw at 15psi mid-range (dropping to 14psi up high).

4th gear with ebc = full-boost at 3300rpm (1 bar), 7psi at 2800rpm.

Skylinatic, your midrange torque is amazingly similar to mine at ~520Nm calculated flywheel. I doubt you'll get much more out of the turbo though, maybe another 10hp or 20 max.

I put the boost down to 16psi, went past my tuner and asked a few questions about the turbo. he said it is completley safe on 18psi and its not a ceramic wheel its 100% steel. i also rang up a few other places and they all say the same thing, all say its steel wheel turbo.

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

    • Back again. I returned to Japan in Jul/Aug to spend time with the car on my birthday and remind myself what all the sacrifice and compromise is for. It happened to line up with the monthly morning meet in Okutama, which I have been wanting to go to for a long time. It's a unique event at a unique spot with really rare, interesting, and quirky cars. It's where all the oldheads and OGs gather. The nighttime scene at DKF certainly has its place and should be experienced if you're into cars, but there's too much bad attention and negativity around it now. IMO the better time is Sunday morning at DKF or Okutama; it's more chill and relaxed. I'm glad I was finally able to go, but not sure it's worth the drive from all the way from Nagoya immediately the day before, unless I was already staying in Tokyo for the days right before the meet, because you have to wake up quite early to make it in time. Funnily enough though I didn't drive the car all that much this trip because it was just too damn hot. While there were zero issues and running temps were nominal and the A/C was strong, RBs already run crazy hot as it is. Sure, it took it all like a champ but something about driving these cars in the ridiculous heat/humidity bothers me and makes me feel like I'm asking too much of it. I'm just me being weird and treating the car like a living thing with feelings; I'm mechanically sympathetic to a fault. Instead I was mainly driving something else around - a KX4(silver) 2001 X-Trail GT, that I acquired in May. There's a few different flavors to choose from with Xs, but visually it's the Nissan version of the Honda CR-V. Mechanically it's a whole different story as this, being the top-trim GT, has an SR20VET mated to a four-speed auto and full-time AWD! It was a very affordable buy in exceptional condition inside and out, with very low mileage...only 48k kms. Most likely it was owned by an older person who kept it garaged and well-maintained, so I'm really happy with how it all worked out. It literally needs zero attention at the moment, albeit except for some minor visual touch-ups. I wanted something quirky, interesting, and practical and for sure it handily delivers on all three of those aspects. I was immediately able to utilize the cargo and passenger capacity to its full extent. It's a lot of fun to drive and is quite punchy through 1st and 2nd. It's very unassuming -in the twisty bits it's a lot more composed than one would think at a glance- and it'll be even better once I get better tires on it(yes, it's an SUV but still a little boat-y for my liking). So...now I have two golden-era Nissans in silver. One sports car and one that does everything else; the perfect two-car solution I think👍 The rest of the trip...I was able to turn my stressed brain off and enjoy it, although I didn't quite get to do as much as I thought. I did some interesting things, met some interesting people, and happened into some interesting situations however, that's all for another post though only if people really want to know. Project-wise, I went back to Mine's again to discuss more plans and am hoping to wrap that up real soon; keep watching this space if that interests you. Additionally, while working in the tormenting sweatbox that is the warehouse, I was able to organize most of the myriad of parts that my friend is storing for me along with the cars, and the 34 has a nice little spot carved out for it: And since it can get so stupid hot in there, that made it all the more easy -after I was standing there looking at the car and said 'f**k it'- to finally remove all the damn gauges that have mostly been an eyesore all this time. Huzzah. The heat basically makes the adhesive backing on the gauge mounts more pliable to work with, so it was far less stressful getting this done. I didn't fully clean it up or chase the wiring though; that will happen once I have the car in closer possession. Another major reason to remove all that stuff is to give people less reasons to get in my car and steal s**t while it's being exported/imported when/if the time comes, which leads us to my next point... ...and that is even though it's time in Japan is technically almost up since it's a November car and the X would be coming in March, I'm still not entirely sure where my life and career is headed; I don't really know what the future looks like and where I'm going to end up. I feel there's a great deal of uncertainty with me and as a result of that, it feels like I'm at a crossroads moreso now than any point in my life thus far and there are some choices I need to make. Yes, I've had some years to consider things and prepare myself, however too much has happened in that time to maintain confidence and everything feels so up in the air; tenuous one might say. Simply put, there's just too much nonsense going on right now from multiple vectors. Admittedly, I'm struggling to stay in the game and keep my eyes on the prize. So much so in fact, that very recently I came the closest I ever have before to calling it quits outright; selling everything and moving on and not looking back. The astute among you will pick up on key subtext within this paragraph. In the meantime I've still managed to slowly acquire some final bits for the car, but it feels nice knowing there's not much left to get and I'm almost across that finish line; I have almost everything I'll ever want for my interpretation and expression on what it is I think an R34 should be. 'til later.
    • Thanks for that, hadn’t used my brain enough to think about that. 
    • Also playing with fire if they start to flow more air down low than what the stock twins can. It's not even up top you need to worry, it can be at 3000rpm and part throttle and it's getting way more flow than it should.
    • Any G40/1000 or G40/1250 results out there?  
    • You still want a proper tune on the stock ECU though. Stock tune + stock ECU with GT-SS/-9s is probably playing with fire if you're running more than stock airflow/power.
×
×
  • Create New...