Jump to content
SAU Community

Recommended Posts

Hi all,

Just wondering what turbo would suit my needs.

I'm after a replacement turbo for my rb20det to run around 16 to 18 psi. I'd prefer for it to not be too laggy, but i also would like it to be able to maintain this boost at the high end rpm.

What turbos would fit this description and how much would i be looking at to purchase them?

Link to comment
https://www.sau.com.au/forums/topic/216936-which-turbo/
Share on other sites

currently i've got:

apexi pod filter, greddy fmic, gtr fuel pump, 3" turbo back exhaust, and remapped chip.

not particularly sure what hp i'm looking for. Just more :down: . probably only have about 200 now, so 250+ would be nice.

I don't quite understand why the same pressure at the same rpm can give different results from different turbos... maybe i'm thinking about it too simplistically.

Budget is probably 1500 or so. but if possible i'd like to spend less (as most people would)

edit: (oh and thank you :D )

Edited by Wogan
Link to comment
https://www.sau.com.au/forums/topic/216936-which-turbo/#findComment-3830387
Share on other sites

i'm sure you can find in the power upgrade thread someone running a large turbo at 12-14 psi making bucket loads more power than people running stock turbos at 12-14psi on the rb20det

does your buget of $1500 include installation, oil / water line modifications, exhaust and / or intercooler pipe modifications? do you have the stock manifold?

$1500 will be enough to get a turbo, but not enough for a drive in / out conversion. even a gcg high flow requires some sort of oil line modifications, don't they?

and as r31nismoid said, do not touch a 2540.

Link to comment
https://www.sau.com.au/forums/topic/216936-which-turbo/#findComment-3830656
Share on other sites

what about an rb25 turbo? are they a direct replacement? Obviously i wouldn't be looking at the same sort of power output, but i have seen some for pretty cheap.

I've got the stock manifold on at the moment, but do have a stainless hi-mount manifold that i may use, depending on how crazy i go with the spending.

my budget is kinda a money over time thing.. i've got about a thousand to spend on the car per month. I have about 1500 at the moment for the turbo itself.

Link to comment
https://www.sau.com.au/forums/topic/216936-which-turbo/#findComment-3830690
Share on other sites

if you can save $1k per month, then don't upgrade to an rb25 turbo. wait a while and get something brand new and good. guess you'll have to do your own research for what turbo will meet your demands, how much power, how much lag and how much fiddlying around

Link to comment
https://www.sau.com.au/forums/topic/216936-which-turbo/#findComment-3832211
Share on other sites

From what I understand you have to know 2 things when selecting a turbo -

1.) Application (racecar, streetcar, dragcar, targa, etc)

2.) HP you want from engine

For example with application -

Street - short runner exhaust manifold, small turbo, small A/R exhaust housing, etc for low to mid boost response but lose peak hp (factory car).

Racetrack - long runner manifold, bigger turbo, bigger A/R exhaust housing, etc for more mid to peak hp but lose boost response.

That's why some have 2 different engines with 2 different turbo's for racetrack, dragracing. Garage Saurus would probably be a good example with their R32 GTR that has a 9 sec drag engine + turbo setup and racecar engine + turbo setup.

Edited by SKYPER
Link to comment
https://www.sau.com.au/forums/topic/216936-which-turbo/#findComment-3832697
Share on other sites

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

    • My thinking is that if the O2 sensor is shot then your entire above described experience is pure placebo.
    • Here is the mess that I made. That filler there was successful in filling dents in that area. But in the middle area. I can feel dents. And I've gone ocer it multiple times with filler. And the filler is no longer there because i accidently sanded it away. I've chased my tail on this job but this is something else lol. So I'm gonna attempt filler one more time and if it doesn't work I'll just high fill primer the door and see where the issues are because guidecoat is of no use atm.
    • Ok, so I think I sort of figured out where I went wrong. So I definitely overthinked it, and I over sanded, which is probably a large part of the problem. to fix it, I ended up tapping some spots that were likely to be high, made them low, filled them in, and I tackled small sections at a time, and it feels a lot better.    I think what confused me as well is you have the bare metal, and some spots darker and some are lighter, and when I run my finger across it, it' would feel like it's a low spot, but I think it's just a transition in different texture from metal to body filler.    When your finger's sliding on the body filler, and crosses over to the bare metal, going back and forth, it feels like it's a low spot. So I kept putting filler there and sanding, but I think it was just a transition in texture, nothing to do with the low or high spot. But the panel's feels a lot better, and I'm just going to end up priming it, and then I'll block it after with guide coat.   Ended up wasting just about all of my filler on this damn door lol  
    • -10 is plenty for running to an oil cooler. When you look at oil feeds, like power steering feeds, they're much smaller, and then just a larger hose size to move volume in less pressure. No need for -12. Even on the race cars, like Duncans, and endurance cars, most of them are all running -10 and everything works perfectly fine, temps are under control, and there's no restrictions.
    • Update: O2 sensor in my downpipe turned out to be faulty when I plugged in to the Haltech software. Was getting a "open circuit" warning. Tons of carbon buildup on it, probably from when I was running rich for a while before getting it corrected. Replaced with new unit and test drove again. The shuffle still happens, albeit far less now. I am not able to replicate it as reliably and it no longer happens at the same RPM levels as before. The only time I was able to hear it was in 5th going uphill and another time in 5th where there was no noticeable incline but applying more throttle first sped it up and then cleared it. Then once in 4th when I slightly lifted the throttle going over a bump but cleared right after. My understanding is that with the O2 sensor out, the ECU relies entirely on the MAP tune and isn't able to make its small adjustments based on the sensors reading. All in all, a big improvement, though not the silver bullet. Will try validating the actuators are set up correctly, and potentially setting up shop time to tune the boost controller on closed loop rather than the open loop it is set to now. Think if it's set up on closed loop to take the O2 reading, that should deal with these last bits. Will try to update again as I go. 
×
×
  • Create New...