Jump to content
SAU Community

Recommended Posts

I searched around without success.

I've reached about 95% on my AFMs and I'm looking to upgrade. I have a PFC about to go in.

Z32 appears to be the standard upgrade, but that's larger then I need. I was wondering if RB25DET AFMs would be a good upgrade. I gather two 25DET AFMs will flow more then the R32 GTR items????

Anyone done this change? Or any other suggestions.

Link to comment
https://www.sau.com.au/forums/topic/169320-25det-afms-in-gtr/
Share on other sites

I'd like to know the answer as well..

I searched around without success.

I've reached about 95% on my AFMs and I'm looking to upgrade. I have a PFC about to go in.

Z32 appears to be the standard upgrade, but that's larger then I need. I was wondering if RB25DET AFMs would be a good upgrade. I gather two 25DET AFMs will flow more then the R32 GTR items????

Anyone done this change? Or any other suggestions.

Just get twin Nismo AFM's.

The are a Z32 sensor, in a stock AFM housing.

Therefore they bolt up to the factory piping. This is a key factor as it saves $$$ having to redo all the cooler piping and a lot of dicking around.

The Nismo AFM's are the next step up from the stock RB26 AFM's

Re-doing the afm piping isn't an issue as I was looking at reolacing the lot with stainless, just interested in if the rb20/25 afm was a workable upgrade or not.

Considering that I will only be paying for the materials, not the fabricating, the rb20/25's might work out cheaper than buying a pair of nismo afm's.

james.

rb20 and rb25 afm are same size and same calibration.

Rule of thumb for Air Flow meters RWKW & Engine BHP

added nismo afm onto paulr33's table

------ ---- OD ---- RWKW ---- RWKW ---- BHP ------ BHP

No of AFM's ---- ------- 1 -------- 2 -------- 1 -------- 2

RB26 ------ 65 ------ 149 ------ 299 ------ 271 ------ 474

RB20/25 --- 80 ------ 226 ------ 453 ------ 376 ------ 683

Z32 ------- 80 ------ 255 ------ 511 ------ 415 ------ 763

Nismo----65------------------570

Q45 ------- 90 ------ 302 ------ 605 ------ 479 ------ 890

Edited by andz
I searched around without success.

I've reached about 95% on my AFMs and I'm looking to upgrade. I have a PFC about to go in.

Z32 appears to be the standard upgrade, but that's larger then I need. I was wondering if RB25DET AFMs would be a good upgrade. I gather two 25DET AFMs will flow more then the R32 GTR items????

Anyone done this change? Or any other suggestions.

Yes,

I have put 2 RB25afm's on my gtr...bought for $200 dollars...second hand off a member of this forum...got them fitted...modified old intake.

Had to buy 2 adaptors from Just Jap Sydney $80.....total...

So was in for cams and retune anyway...so fitting was $200(That is cutting the Tomie pipes that were there...installation of some adaptors as mentioned and

some silicone hose and clamps....it all looks good...total cost..

$480.....

If I knew this before...would have bought the Nismo items.......direct bolt on...lol...I did not need new plugs.....

Z32's require...plug adaptors.

If I find my post I will give you a link.

added nismo afm onto paulr33's table

------ ---- OD ---- RWKW ---- RWKW ---- BHP ------ BHP

No of AFM's ---- ------- 1 -------- 2 -------- 1 -------- 2

RB26 ------ 65 ------ 149 ------ 299 ------ 271 ------ 474

RB20/25 --- 80 ------ 226 ------ 453 ------ 376 ------ 683

Z32 ------- 80 ------ 255 ------ 511 ------ 415 ------ 763

Nismo----65------------------570

Q45 ------- 90 ------ 302 ------ 605 ------ 479 ------ 890

Nismo/Z32 are identical. So not sure what your getting at there.

And that above table is wrong.

I made 270rwkw on PULP with a Z32 and it was nowhere near maxing out. Same as a lot of other peoples.

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

    • Can u check this way it works for power supply?
    • These coils draw 10amps that what i read online
    • I appreciate the detailed explanation, think I understand now. I spent the better part of last night reading what I could about shuffle and potential solutions. I had replaced the OEM twin turbo pipe with an alternate Y pipe that is separated further away from the turbo. The current one is from HKS and I had a previous pipe that was separated even further away, both have shuffle. I had heard that a divider can be welded in to the OEM pipe to remove turbulence, and figure that aftermarket pipes that are more separated would achieve the same thing. From what I read, most people with -10 turbos get shuffle due to their size, though it's a bit less common with -5s on a standard RB26. I think Nismoid mentioned somewhere it's because OEM recirculation piping is common in Australia with -5 cars. It seems that the recommendation tends to vary between a few options, which I've ordered in what I think is most feasible for me:  1. Retune the MAP or boost controller to try to eliminate shuffle 2. Install OEM recirculation piping 3. Something called a 'balance pipe' welded onto the exhaust manifolds. I don't know if kits for this are available, seems like pure fabrication work 4. simply go single turbo My current layout is as follows: Garrett 2860 -5s HKS Racing Suction intake MAF delete pipes HKS racing chamber intake piping hard intercooler piping,  ARC intercooler HKS SSQV BOV and pipe Haltech 2500 elite ECU and boost solenoid/controller HPI dump pipes OEM exhaust manifolds HKS VCAM step 1 and supporting head modifications Built 2.6 bottom end All OEM recirculation piping was removed, relevant areas sealed off I'll keep an eye out for any alternative solutions but can get started with this.  Only other question is, does shuffle harm the turbo (or anything else)? It seems like some people say your turbo shafts will explode because of the opposing forces after a while and others say they just live with it and adjust their pedal foot accordingly. 
    • That worked out PERFECTLY! Thank you big time to JJ. He was able to swap me his stock diff. He drove all the way to me as well. Killer! Removal & install was pretty straightforward. The diff itself is HEAVY. So that’s a 2 man job.  Man does the car drive nice now! Couldn’t have worked out any better 👌
×
×
  • Create New...