Jump to content
SAU Community

Recommended Posts

QUICK QUESTION....JUST WANT TO KNOW WHAT THE MAX & SAFE BOOST ON RD20 STOCK TURBO CAN HANDLE?

SETTING : STOCK RB20 DET 107000 KM

AIR FILTER

3' CAT BACK

MANUAL BOOST CONTROL

FMIC

SFC-HYPER R http://www.field-net.co.jp/english/lineup/hyper-r/

CAR CURRENTLY RUNNING 1.3 BAR...... BUT I DUN WANT TO BLOW THE TURBO, WILL GO DYNO ASAP...

Edited by whyau1
Link to comment
https://www.sau.com.au/forums/topic/171198-max-boost-for-rb20det/
Share on other sites

The stock turbo has a ceramic turbine. Don't push it too far because it'll let go alot easier than a steel job. 1.3 bar sounds high to me. I wouldn't push mine above 1 bar, but i might just be over cautious

Edited by D3LTR33

There is really no point to runnig more than 14 psi or 1 bar through a standard RB20DET turbo. For starters you'll have bits and pieces of your turbo go through your intercooler piping and/or exhaust and the turbo is basically pumping hot air into the engine as it is well out of its efficency range at 1.3 bar :S

the rb20 uses a ceramic turbo but the front and rear wheels are steel so there not as prone to failure as the r33 series 2 ones. if i were you i wouldnt go over 13.5. with a boost spike it might just touch 14.5. keep it safe on 13 psi

:):D:thumbsup:

when i had a std turbo RB20 i never went past 10psi. Like mentioned, ~13psi would be the "safe" upper limit. Anything more and you are bound to run into problems eventually/decrease the "life expectancy" of your turbo dramatically.

the rb20 uses a ceramic turbo but the front and rear wheels are steel so there not as prone to failure as the r33 series 2 ones. if i were you i wouldnt go over 13.5. with a boost spike it might just touch 14.5. keep it safe on 13 psi

What the hell are you talking about mate? LOL... the exhaust will IS ceramic. Thats why its a ceramic turbo...

14psi ran fine through my old rb20 turbo but 19psi is pretty excessive.. I'm now running 12.5-13psi through an rb25 turbo on my rb20, anymore and it pings over 6000rpm (untuned ecu) once my 044 goes in and I get an ecu I will wind some more boost in and test the limits of the 25 turbo :)

when fitting my stock rb25 turbo to my rb20

i hit 24psi before a loose cooler pipe blew off.

it is possible but i wouldnt recommend it.

when i got it tuned to 12psi,we tried for 14psi but the extra 2psi only gained like 2-3kw

plus had to do unsafe stuff with ignition timing,so i settled for 12psi with a safe tune.

1 bar or 14/15 psi upper limits. Buy a highflow from sliding performance or a GCG rb25 turbo.... and support those mods! FMIC exhaust, fuel pumps, piggy back fuel computers! etc or just get a rb25 turbo from a r33 s1 or s2 (different turbines but nylon vs Steel wheel)

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

    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
    • So, now all you need to do is connect the 2 or 3x 12v feeds into the unit to permanent 12v, ACC 12V and IGN 12V that you can find in the spot behind the stereo, and the earth, and then it will switch on with the car.
×
×
  • Create New...