Jump to content
SAU Community

R33 Boost

kikka

By kikka,
in General Automotive Discussion

 Share

Recommended Posts

mad082 Grand Master

mad082

Posted
Posted

the answer to this varies. for starters, how much you can run and how much you should run are 2 different things.

what mods does the car have? does it have an after market exhaust? does it have an aftermarket intercooler? if yes to both then anything up to about 12psi is fine, although the ecu may start to throw a tantrum around 12psi. if no to the intercooler but yes to the exhaust then keep it to about 10psi. if stock exhaust then don't bother at all, just do the high mode boost mod to make it run 7psi all the time rather than the stock 5psi below 4500rpm and 7psi above 4500rpm.

also engine failing isn't an issue. the turbo failing on the other hand is the issue. the stock turbo runs a ceramic exhaust wheel and this gets weakened by excess heat (which is why i said not to raise the boost on a stock exhaust, as the restrictive exhaust causes the turbo to run hotter). generally 12psi is considered the upper level of what is safe. some people will tell you that the turbo won't make any more power beyond 12psi but this is false. it will still increase in power up past 16psi, but it would be a ticking time bomb. also the stock ecu won't let you run much past 12 or 13psi before it goes into excess airflow protection mode (more commonly known as rich and retard, as it richens up the mixture and retards the timing).

Link to comment
https://www.sau.com.au/forums/topic/372265-r33-boost/#findComment-5940335
Share on other sites
  • 4 weeks later...

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      My BMW 335i

      By GTSBoy · Posted

      f**kin' yikes! That insulation is the shittest stuff I have ever seen. You need to do an insurance job on that f**ker, pronto. WRT to the washer cover, I would have said that there'd have to be some at a wrecker, then remembered that it's a BMW, and reasoned that every single wrecked one would have been tailgating and so the front end would be trashed.
    • PranK
      My BMW 335i

      By PranK · Posted

      Oh and I lost my headlight washer jet cover!
    • PranK
      My BMW 335i

      By PranK · Posted

      Ok, so I got myself some X1 wheels really cheap to try out, they're a bit different and I like them but they're really narrow (18x8) they are available in staggered 18x8/9 also but really hard to find.  I kinda dig them, but not as much as the F10 19's I usually run, so these go into the wheel pile.         As I mentioned in another thread, I got a new exhaust. It's an off-the-shelf stainless one that fits OH-KAY. I don't love the tips size and how far they come out the back, I think I might cut the tips off and replace with some smaller (~3") ones that don't extend as far. It sounds really good though, I'm not sure if its just in my head but the car feels a little quicker, more responsive.      I fitted an eBay special front lip. Surprisingly it fit perfectly and all holes lined up. Its a little rickety but I haven't put any double sided tape on yet, I want to clean the front bar up where it has scraped the road a lot and fil in the number plate holes (or, get body coloured wrap to cover them - is this a thing?  I'm not sure if I'll leave it gloss or pain it matte. I really like it though, I don't particularly like the front bar without it, I don't really like the M-Sport and to get anything else is just too expensive. That said, I might need a new one now anyway as I dropped the car onto the jack after forgetting to put ramps under the front wheels. It bent a lot and while it did go back to normal after I got the car off the jack, I do fear I have not done it any favours.    Lastly, my headlights died. Different problems in each. They have gotten much dimmer over the past year or so, I put new (uber expensive) OSRAM bulbs in them but to no avail. One of them pointed at the ground and the other just kinda did its own thing with light working sometimes. Yeah, check this 18 year old BMW headlight wire. I reckon I know why they were stuffed.            BTW, the yellow and black is the power to the Xenons. Yikes. I hunted around an researched my options here. I would have loved to just get a replacement harness but not a thing. My car has adaptive headlights, that is they rotate left and right with the steering wheel. Good condition used adaptive xenons were over $700 each, non adaptive were around $400 each, but I couldn't help but think that they're all around 18 years old now, surely they'd have the same problems. So I looked at newer LCI headlights but they were even more expensive and I couldn't confirm that they'd be plug and play with lots of people having lots of opinions so not worth the risk.  I ended up getting brand new Chinese headlights from MARS. They're very close to OEM with only the angel eyes being a bit different. I didnt want crazy turn signals or sharp DRL's or anything. Not my bag.  They're not adaptive, I thought thats a feature I wouldn't really miss. So I coded that out.  The lights are awesome, they look so nice and they take so many years off the car. The angel eyes look great and the headlight brightness is ridiculous. I was so used to the old ones, I didn't realise just how bad they were. The new ones use the OEM bulbs, Xenon ballast and leveller motor which I was happier with. The only issue with them is that the rear cover is held on by SEVEN screws. This will be a nightmare to get to and open when I need to change bulbs.   
    • joshuaho96
      Lets play a game - What is causing my oil consumption?

      By joshuaho96 · Posted

      Now that you mention it I can see those too. More subtle. The lighting and low resolution makes it hard to assess super well what's going on but what is visible is bad enough to pull the motor.
    • Lithium
      Welshys 32ZILA and the 8HP.

      By Lithium · Posted

      I feel like this is due an update
×
×
  • Create New...