Jump to content
SAU Community

Recommended Posts

Just had a rb25 turbo installed on my r32 and having a bit of a problem :P when i come on to boost it will go to around 3 PSI then it will f**k up. By that i mean it is seriously missing, then it will stop and start boosting up to 12psi and be fine. It only seems to this if i accelerate hard or drop a gear. Any ideas would be great thanks.

BTW. I am running the turbotech boost controller

Link to comment
https://www.sau.com.au/forums/topic/102655-problems-with-r32/
Share on other sites

Are you actually experiencing turbo lag? I would have thought that an RB25 turbo will need more exhaust gas to spool up the turbo nicely. After all, that's why Nissan's engineer put RB20 turbo in R32 and RB25 turbo in R33. Looks like ur ECU starts to get confused with the "alien" turbo that doesn't behave as it's suppose to be. Do you have aftermarket air/fuel controller e.g. SAFC or even a piggy back Greddy E-Trust/HKS F-CON or a full replacement computer PowerFC? The cheapest alternative is to get ur stock R32 ECU re-mapped. DR_DRIFT here on this forum can do that, and there's a few other mechanics out there who specialises in re-programming R32 ECU chip.

i ran around with my RB25 turbo on the stock computer for about a month, and didn't have a drama with it getting 'confused', rs73....

These are the things i would check:

Are you hitting the factory boost cut? I never ran more than 9psi when i had the '25 turbo, before i got it tuned (and boost cut removed) so i'm not sure if it would be hitting that or not...

Plugs - Are they the right gap? Are they fouled? Worn out?

Fuel Pump - Is it supplying enough fuel?

Coilpacks - Are they stuffed?

Vacuum Lines/Cooler Pipes - You haven't left a line/pipe off somewhere have you?

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

    • Hello all I have 2 r34 sedans , one turbo one na, only recently aquired the na 34.  Man what is with these things.... My turbo 34 started sounding like a super charger, it was screaming at anything above 4000rpm , I took the alternator apart and replaced the front bearing which is the only one I think you can access and it did not fix the issue so presumably the bearing in the rear of the alternator is gone. ( diagnosed it was the alternator by taking off the aux belts one by one to figure out which pulley or bearing it was )  My friend gave me one he had lying around, Installed it , it did not squeal for maybe 500kms and now its started to squeal again briefly on startup  Recently got an na r34 and I replaced the timing belt, water pump + all the auxillirary belts. Runs amazing but it suddenly developed the same squeaking problem but significantly worse, Ive had my neighbour come down screaming at me because it was waking her up everytime I moved the car. It takes a good 2 minutes before it quietens down.  Im yet to diagnose where its coming from but im fairly sure its coming from the alternator aswell. My question isnt about how to fix it but rather where can you get a new alternator for an rb25 neo??? Ive searched everywhere but I havent been able to find a direct fit oem type replacement thats not genuine. All the automotive stores sell an oex one - BXA035 - which I picked up for cheap through a friend with staff discount , got it home only to find the connector is completelty different.... As far as im aware bxa035 is for rb20/30's and after a bit of figuring out the bxa035 has an ev14 type connector, which is tiny compared to the rb25 connector. I actually had an ev14 connector lying around which I was considering just replacing the bigger plug with to get the alternator working but the bxa035 is rated for 70amp vs the rb25 alternators are 90amp ( or so ive been told ? ) That paired along with the fact im about to install an amp + sub in the back and I have the stock sized small battery Im not sure itll do the job unless anyone has another opinion?  I know and have seen all the websites selling the ls1 alternator conversion kit but I am not going down that route, nor do I have the money to. Hopefully I can figure out how to get 2 brand new alternators for both cars. I would buy second hand which there seems to be many of but considering how common this seems to be im sure If I installed a second hand one it would start squealing in no time  Or even better if anyone knows how to fix the issue directly with the alternator itself... Any input appreciated Thank you     Link for bxa035 connector picture
    • As above, replace as many as you can afford. If anything, due to old age.
    • Can confirm previous shop that built my motor had no fking clue about oil control and caused my motor to shit itself after two track days. Current shop, Birrong Automotive, has managed to build me a motor, not to mention, has also let me tune it myself and it has yet to blow up after 7 track days. Great oiling success, yashimash.
    • It definitely seems like you have no beef, with only digging up a 5 year old post, to comment on an inflammatory item with total insensitivity, and of which had nothing to do with the thread.  Yep, you definitely seem like a great person and your friends and family would be so proud to know of your lovely actions
    • Thanks buddy, so happy to be back! Managed to pickup a Unicorn R34 completely stock and clean. Looking forward to adding some goodies to it and posting one here. I'm shocked that so many forums stopped. If you could find my old profile - I'd love that if its possible. My old account was JET200GT. My email might need to be fixed too. To use this one. I think it was the same though..
×
×
  • Create New...