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Rb20 Turbo Question

WA_R32

By WA_R32,
in Western Australia

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WA_R32 Grand Master

WA_R32

Posted
Posted

hey,

just a quicky :blink: just wondering how much boost an rb20 turbo can hold safely, im running 12psi through mine but dont want to go anymore cause i have heard lots of stories of ceramic turbos shattering and getting sucked back into the combustion chamber.

should i maybe turn it back down to 10psi till i buy an rb25 turbo or can i leave it at 12 for a while????

Cheers

Matt

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https://www.sau.com.au/forums/topic/185039-rb20-turbo-question/
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Rekin Grand Master

Rekin

Posted
Posted

i have sitting next to me a peice of my friends r32 turbo compressor wheel which shot out through his exhaust.

He was running 15psi + flutter, did a couple of drag runs and bang pop.

I think safe boost level is 13-14psi although quite a few people run at 15psi.

Cheers

WA_R32 Grand Master

WA_R32

Posted
  • Author
Posted
you can get away with running 14psi on the rb20's most of the time, but it's best to get it on the dyno if you do to see if it's running lean.

yeah i haven't put my dump pipe on yet so i might wait till i put it on before i turn it up anymore i also want to get a dyno test done but i think ill wait till the next dyno day

  • 2 months later...
WhatBrake Collaborator

WhatBrake

Posted
Posted

I'm running 14-15psi but my engine and turbo are low km's. Does it fine, no probs at all. One of my mates has also run his for over a yr at 14-15psi no probs. Wow, even if a turbo lets go after 2 years thats a huge total cost of like $80 a year for a lot more fun. 11-12 is safe as (If it lets go ure turbo is average anyhow) but i'd run 14psi and no be a b!tch.

Cheers

dmr Mentor

dmr

Posted
Posted

i'm running 12.5 and havn't had any problems. i hear 12 is safe and 14 is pushing the limit but this is just heresay. i guess it also depends on your driving style, how you maintain your car, and how many km the turbo has done. just make sure you give it enough time to cool down after a hard run and keep it out of high boost in the heat.

Anakha Rising Star

Anakha

Posted
Posted

I'm just going to add my bit to the above - which are all good opinions. However, I can see you really want a definitive answer. So:

It actually comes down to each car. Now you ask what part? Well, its the whole thing, including the driver!!!!!!! I've developed a simplified formula for you:

post-17876-1195997200_thumb.jpg

The second page got beer spilt on it so I decided just to skip to the last equation:

RB20DET ~ 10-15psi.

Hope it helped :laughing-smiley-014:

GTR-32U Mentor

GTR-32U

Posted
Posted

dude if your gonna upgrade then I would go a 2530 or 2510...maybe something from trust. The R33 turbo is an improvement over the RB20 as it has a larger wastegate..but its still ceramic...I had a 2510 on my RB20 and it ran beautiful at 16 pounds..If you are gonna go to all the trouble of changing dump pipes then while you are there change all the water and oil lines with brand new ones.They are a nasty thing to change at the best of times, specially that water hose around the back of the engine, we had to drop the starter motor to get to that one...

Zell Explorer

Zell

Posted
Posted

when i got my 32 it was running stock boost, seemed fairly quick for the first few weeks as its my first turbo and wasnt used to the power change when it hit into boost. Got bored of it so had it dyno'd at hyperdrive to check a few things out and the guy asked me if i wanted to turn it up a bit, i said yes of course :P it is now running 13psi on the high boost setting and has been fine, mind you i only turn it up when i want to give it a bit of a boot. I also only have cat back exhaust and he said it should be fine as long as you dont boot it every day to work on the highway.

got a question of my own, im getting the dump pipe fitted soon and going for a bigger turbo, ive heard the rb25 runs well but want a bit more of an upgrade, any ideas of whats a good turbo upgrade to get?

cheers

bubba Grand Master

bubba

Posted
Posted

I hammered my RB20 turbo at 14psi everyday, and again with the 25 turbo at 12psi. No problems whatsoever ;)

Then I got sick of no bottom end and having to give it 3k and drop the clutch to take a gap in traffic.. RB30 FTW!

r32woohoo Rising Star

r32woohoo

Posted
Posted
The R33 turbo is an improvement over the RB20 as it has a larger wastegate..but its still ceramic...

lol where'd you get that idea from?

The wastegates are physically the same size.

http://www.skylinesaustralia.com/forums/Sl...20&start=20

look at the pictures

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