Jump to content
SAU Community

Recommended Posts

Hey guys, just got an RB25 ball bearing highflow put on my RB20

just wondering how many of you guys have them and how do they go?

like how laggy are yours? Wheres your power range? and how much boost are you running?

Atm ive got mine on 12psi n i dont see it till ~3500-4000rpm but after that it goes pretty well

i havent gotten it tuned yet coz im still looking for some engine management.

its heaps different from the standard turbo since i used to see 12psi by around 3k

i spose a good tune will get it spooling quicker?

Link to comment
https://www.sau.com.au/forums/topic/155293-whos-got-a-highflow-r32s/
Share on other sites

Hey mate I have a hi flow on mine but I have a VG30 rear housing (so it will be laggier then yours), 1st gear I dont really get much boost at all unless I launch the car from about 4 - 5k 2nd gear it comes on strong from about 4500 and really throws you back around 5 - 5500rpm.

It is a LOT laggier then the standard turbo but now that im used to driving it and knowing how to hold my revs etc it doesnt seem so bad at all.

My supporting mods are : Power FC, GTR Injectors, GTR front mount, 3inch turbo back exhaust, and a bosch 040

any other questions you have feel free to ask me and ill try my best to help

PS I made spot on 200rwkw with 17psi

Its a R32 highflow with a VG30 rear housing, the rear housing is whats causing my lag issues, this turbo would much better be suited to a RB25. Nothing I can do about it now anyway I cant afford to pull it off and change turbos or exhaust housings etc so ive learnt to live with it.

atm ive got a 3" split dump/front pipe into a 3" fujitsubo catback and an fmic

i dunno wat kind of management im going to get yet but ive got gtr injectors waiting to go on, gotta get a fuel pump and im looking into some gtr cams to get it spooling earlier.

cant do much about it right now, guess ill just have to live with the lag for a while

Throw an Rb26 Powerfc in to it.

Any half decent workshop knows how easy it is to get it working with the GTST.

Forget the GTR cam's idea UNLESS you are going to have them reground by LukeVL (Tighe cams).

is it rb26? i thought that rb25 PFC was the go for the rb20 without resorting to APengineering ones :D

r32woohoo

I have the same turbo as you and on the RB20det. full boost 19psi is about 4100. boost starts building at around 3000 i am running GTR injectors and pump big fmic, 3" turboback and metalcat.

the car is making 240rwkw and is good to drive once you get used to the lag.

I tuned the stock ECU and it runs perfect 12:1 AFR's

If you want I can burn you a copy of my tune and just modify it to suit your injectors and afm.

pm me if you are interested

Hey guys, just got an RB25 ball bearing highflow put on my RB20

just wondering how many of you guys have them and how do they go?

like how laggy are yours? Wheres your power range? and how much boost are you running?

Atm ive got mine on 12psi n i dont see it till ~3500-4000rpm but after that it goes pretty well

i havent gotten it tuned yet coz im still looking for some engine management.

its heaps different from the standard turbo since i used to see 12psi by around 3k

i spose a good tune will get it spooling quicker?

Exactly what sort of high flow is it? ie. who did it, and what core has gone into it? Using RB25 housings won't be the real issue on lag - the size + trim of impellers will though.

If it's a Garrett core into Nissan/Hitachi housings then there will be ID tag numbers visible. They tell the story on what spec impellers you have. If you can find them, post 'em up.

Both can be used.

Rb26 pfc's are still easy to get where as the rb25's are not. :laugh:

Oh, i wasn't aware that rb25 pfc are getting hard to get. I wonder why?

and to stay on topic: I used to have a R34 Rb25 highflow. all i can say is that HKS GTRS is x10 better...but then i had a pretty average highflow :laugh:

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

    • I thought I'd come back and add something I JUST learned. A Toyota LandCruiser with a 1HZ, mates perfectly with a bottle of Nulon brake fluid. As in, it perfectly screws in. Great make shift funnel when you cut the bottom of it off. This may work for your Corolla.   Unfortunately, tipping a 10L drum is much harder than a 4 to 6L bottle, and they no longer include the easy pour tap which was just perfection to use previously.  
    • Guys since i bought r33 gts25t coupe 1994 automatic a/t(manual swap 350z gearbox)  all i got is problems, always problems. Lets start with that when i turn key into ignition(ON) fuel pump doesnt always works. Sometimes i have to turn key twice Off/on/off/on until it primes. Its new, dw300 - 340lph. My gearbox broke so i did gearbox swap, install different intake manifold, injectors and i take pipes. Car was sitting in garage for more than half a year. I did assembly all not that long ago and when i turn ignition cant hear prime. All of sudden it stopped working. Theres many videos on YouTube how to make relay mod on r33 straight from battery so i did and it doesnt work! 😰 30 - battery positive  87 - positive from fuel pump to relay 85, 86 - one of two wires from original fuel pump wires(light blue, grey) and it didn’t work. so I check on ignition and took original BLUE relays wires from trunk, next to fuses. (I believe it’s IGN+ and ECU pin 18. it didn’t work…  tried connecting (IGN+ from og relay) and (ECU 104 from 1of4 FPCM wires) to my new relay 85/86 and it didn’t work.  I unplug FPCM. Didn’t work. im thinking what’s wrong   fuel pump is working, if I leave IGN+ on 85 and 86 straight to ground it works but it’s just nonstop. Since it getting constant 12v after key in ON. light blue wire gives me 6-8v.  so how this should be connected? What causing ECU not giving — on pin? Or I did sth wrong and that’s why it doesn’t work? I need negative signal on ECU that control fuel pump. What this should be?
    • You can use your VIN to look up the factory part number somewhere like amayama, and then look to order new if necessary. https://www.amayama.com/en/genuine-catalogs/nissan Depending on price you might want to rebuild instead. @GTSBoy I had an interesting insight into US market parts when the Titan rear calipers were sticking. New calipers were dirt cheap, about 20% more than a rebuild kit....they are just considered throw away maintenance items
    • Funny, but really not funny. Thank god (most) f the world has moved on since then
    • Lots of votes for driving onto a plank first; that is the quickest way I've found, 25mm is enough for my case but that will vary by car It also depends where you are going for. On the 32 I can get to the rear diff with my floor jack if I do that end first, and get it up on stands. Then I lift the front from either front tow hook as high as needed, also onto stands. Sometimes I need a small lift on the other tow hook to get it level enough If I do the front first I can't get to the rear diff because of the angle of the car Other options are getting to the front mount of the rear subframe from in front of the wheel (if only lifting one side, or just do both which is a bit of a pain compared to one lift from the diff), or also the gearbox cross member mount on the driver's side if you are  just trying to lift the driver's side. I This is the jack I use; it says 75mm clearance but of course that is only on the lower section so if you have to reach too far in like the diff you still get stuck. https://www.snapon-bluepoint.com.sg/category/Floor-Jacks/product/Floor-Jack,-2-Ton-Low-Profile
×
×
  • Create New...