Jump to content
SAU Community

Recommended Posts

i had a S2 turbo ran 13psi on weekends or when on spirted drives oh and 1 drift comp and turbo lasted about 3 or 4 months, then one day just on low boost low revs turbo decided it had enough, now funnily enough most problems with these turbo's is the rear ceramic wheel flying apart but in my case i blew a chunk out of the front wheel the size of a 10cent piece, so maybe the good tune can protect the rear wheel but in the end at that boost the turbo is most likely going to go, but good luck hopefully you will get a bit more life out of her

the turbo is rated according to SAU users at running no more than 12psi on an rb25

now remember that at 6000rpm on a 2.5L motor there will be more exhaust gas going through the turbine that at 6000rpm on a 2.0L motor. this means that the exhaust gas temp will be higher on the rb25 than on the rb20

this means that the same turbo on a smaller motor can easily handle 2psi or more because the same turbo at 14psi on a 2L motor is doing about the same work as 12psi on a 2.5L motor

i ran an rb25 turbo on my rb20 for about 1.5years at 14psi and the turbo ran happily all day every day with me driving it like i stole it!

Edited by WazR32GTSt

I had mine running 11psi... Was driving down hill and let off the accelerator and BOOM!!!!! both wheels disintergrated! run 10 pound if u must but no more...

Just putting it out there.i did see my turbo hit 24psi when first installed it and its still in good form.

they can take it,but for how long and is it any benefit over the usual 12psi.

I dont know if u've found ur problem yet or not but it could possibly be either a gasket leak between the manifold and turbo or u may possibly have snapped 1 or more of the 4 studs that hold the turbo onto the manifold... I had my RB20 doing the same and a mate found out that one of the studs was missing and a tiny bit of gas was leaking from there making a little high pitched whizzing noise..

Just to note i ran an RB20 turbo actuator (10psi) all day on my 33 turbo and with the 3 inch exhaust gained 1 or 2 psi on top of that depending on the conditions. I always thought the turbo was stuffed but it was just a tiny leak.

Liam

Edited by FordyR31

did you change the gasket when you did the turbo?

i have an rb25 turbo on my rb20 and i have no odd noises but i changed the gasket, i have a friend who didn't and he has a similar noise to what you say

thanks for the heads up guys...im going to get a malpassi rising rate fuel pressure reg or a nismo one and ive got a apexi n front mount, exhaust, ebc so im hoping to tune up the safc next weekend and bring the boost up to 14psi....hopefully see the 190rwkw mark.

Correct me if I'm wrong but i'm pretty sure that the rb25 series 2 R33 have a nylon compressor wheel, which may cause it to sound a little different to when a steel wheel is spinning up? if this is the turbo you're using it may be the reason, when I changed

mine over from standard to hks 2530 totally diff noise when spinning up.

Just a thought.

15 psi for 40 000km is all i have to say :) noticeabley runs about 10-15 degrees hotter but thats not the end of the world. Nethign over 15psi seems to hit boost cut but just on 15psi seems fine day in day out lol for a daily R33.

Turbo still going strong but has since been set to 10psi for fuel consumption savings lol plus doesnt liek 15psi and stock smic oh hot days on cold days though 15psi all day.

At the end of the day the turbos are cheap and everyone would rather upgrade their stock turbo eventually neways.

Edited by SPINR33GTS

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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...