Jump to content
SAU Community

Max Boost For Rb20det With R33 Turbo?

Stunn-R

By Stunn-R,
in Engines & Forced Induction

 Share

Recommended Posts

  • Replies 56
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Kyebidz Newbie

Kyebidz

Posted
Posted

Tooo many haters on here.

Rohan, you just need to be smart about it dude. Decent boost controller and/or bleed valve to make sure it doesnt spike. Heat wrapping or turbo bag to protect from the heat of the turbo. Run good oil and fluids, but most importantly make sure you warm up and cool down your car properly.

You are getting towards the limit of your turbo with 1.3 bar, but if you do the small things there is no reason why you should enjoy many happy hours of drifting.

Stunn-R Collaborator

Stunn-R

Posted
  • Author
Posted

i think i might leave it @ 1 bar with no boost controller, and then hi flow it later and then put the 17psi spring setup in, to keep everyone here happy lol

on 1 bar it bogs sometimes, on 1.1bar it keeps spinning.. which is why i wanted to try it out... i wanna run boost off the gate thus i sold my boost controller...

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Can you explain this for us Nismoid?

Boost is just a measure of the resistance of the head, for the shaft to spin quicker on an RB20 there must be less resistance...

I'm no RB20 expert, but what you're saying is the RB20 head flows better than the RB25 head?

If you have 12psi, do you think the turbo is spinning as fast as when its making 17psi?

Nope.

Kyebidz - a turbo beanie is the worst idea one could suggest, right up there with a Bee-r limiter!

Tthe hotter the housing and turbine wheel - the more prone to failure the exhaust wheel is going to be.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Stunn-R try getting a remap or an aftermarket ECU...

also, I think you're more suited on nissansilvia.

running 17PSI on a R33 Turbo, on a RB20 with stock AFM and stock injectors, you got to be kidding.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Is it me? or are there more nissansilvia kids on the SAU forum, some tool just posted this up "Blanking Off Bov" http://www.skylinesaustralia.com/forums/Bl...ov-t279384.html

Brockas Proficient

Brockas

Posted
Posted
If you have 12psi, do you think the turbo is spinning as fast as when its making 17psi?

Nope.

Depends how restrictive the head is?

That was kinda my point.

On the same motor, with the same head, with the same turbo and no change in restriction, then of course 17psi is going to require a faster shaft speed. If you were to port the head without touching the turbo, then you would see the same power with lower boost figures (it's about airflow, not "boost").

Boost is ONLY a measure of head restriction, not a measure of shaft speed. Comparing boost levels on different motors with different heads is pointless when trying to determine shaft speed.

cactus Collaborator

cactus

Posted
Posted
lol johhny its not rohan haha

rohan doesnt have a 32 lol

come to a cruise or pm me your number and you canmeet me! i wanna see how keyboard warrioorrrrrRR you are in person lol

Run it at 18psi :iluvff: I had a series 1 25 turbo and ran it at 18psi for about 8 months and never had an issue with it. Even when I pulled the motor out I had a look at the turbo and it seemed happy.

But, if you cant afford to fix it if it does break, then run 12psi. Be smart about it :D

SimonR32 Grand Master

SimonR32

Posted
Posted
Kyebidz - a turbo beanie is the worst idea one could suggest, right up there with a Bee-r limiter!

Tthe hotter the housing and turbine wheel - the more prone to failure the exhaust wheel is going to be.

the sarcasm of his post must of been lost on you!

lachlanw Veteran

lachlanw

Posted
Posted

we got a neo turbo on a 20det . been thrashing it for ages on 14 psi . have had it glowing red after a boost round the hills . it seems to love it . it doesnt glow anywhere near as good as the 20 turbo used to . yeah not much piont in runnin any more on a stock ecu . but yeah your already pushin more yeah . good shit man . need more threads with "do ers " and not the hot air brigade

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Depends how restrictive the head is?

That was kinda my point.

On the same motor, with the same head, with the same turbo and no change in restriction, then of course 17psi is going to require a faster shaft speed. If you were to port the head without touching the turbo, then you would see the same power with lower boost figures (it's about airflow, not "boost").

Boost is ONLY a measure of head restriction, not a measure of shaft speed. Comparing boost levels on different motors with different heads is pointless when trying to determine shaft speed.

Well generally people say the RB20 head is about 30% down on the 25 head.

12 + 3.6 = 15.6... 1.5-2.5psi off the target still

So i say higher shaft speed.

Brockas Proficient

Brockas

Posted
Posted
Well generally people say the RB20 head is about 30% down on the 25 head.

12 + 3.6 = 15.6... 1.5-2.5psi off the target still

So i say higher shaft speed.

So you agree that this statement:

i reckon you can run more boost through a 33 turbs on a rb20 compared to a 25 zebra so im gonna have to disagree with you there buddy :P

is absolute rubbish?

For a while there it seemed like you were trying to tell us that 15psi on an RB20 means higher shaft speed than 15psi on an RB25....

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

    • PranK
      Intro/R33 owner

      By PranK · Posted

      Welcome!  How long have you had it? And what colour is it?
    • The Bogan
      NC MX5

      By The Bogan · Posted

      "CAD" version 1.0 It will have a 15mm lip around the top for 6 × 5 or 6mm nutserts and fixtures (two on each of the three straight edges), and some pinch weld on any exposed edges, it has three mounting points, one of the power steering reservoir bolts, and two on the rad support, my 120mm hole saw will make short work of hole for the silicone joiner, with ample room for some pinch weld  I've also got enough Carbuilders "peel and stick" heat shield to cover the outside of it at the coolant expansion tank and on the engine side, as pictured, and internally on the lid and where the fuse box is, I've also got some thin, about 3mm, black 3M single sided sticky foam stuff that was left over after sealing some door drafts at home to help seal the lid As for the shape, it "sort of" matches the shape of the fuse box, so shouldn't look to "out of place" The lower area and hole for the intake will need pinch weld with a balloon on it to fully seal the hole and bottom of it, that will happen after it has been fabricated so I know exactly what size is required  Filter service has been trialed,  and so far it was a simple process  Just need to get some alloy, and then head into work to use the guillotine and break press in the workshop Hopefully it should be sorted in a week or two Guestimated outlay will be under a $50 for the stuff I don't have on hand (alloy, 6mm nutserts, the pinch weld, and wrinkle paint) Disclaimer: That's what the "voices in my head" are telling me how the filter box should end up getting done......lets see if they know what they are talking about  
    • jez NF
      The Evolution Of "night Fury"

      By jez NF · Posted

      Have been polishing up the trailer rims as they had been sitting in the shed for a few years and are really in need of some love. This was after a couple of passes with chrome polish - coming up quite well ✅ .
    • MBS206
      Intro/R33 owner

      By MBS206 · Posted

      Welcome aboard! Is your Skyline auto or manual? I'm assuming manual. Does it have any mods done yet?
    • Yeetus
      Another "where do these lines and plugs go" RB25DET question

      By Yeetus · Posted

      Hey mate, the brown and grey plugs would usually go to the TPS, brown one goes on the bottom connector and grey is the top but isn't used unless the car is auto, your TPS looks different to mine though I've got a series 2 engine.
×
×
  • Create New...