Jump to content
SAU Community

Recommended Posts

Hi all,

Need some advice on whether I'd benefit from a z32 AFM?

Running an RB25DET with a GT2535 @ 1.2 bar, 550cc injectors & a powerFC. Previous owner reckons it pulls 240-250rwkw but no dyno graphs as yet. I'm of the understanding that around this territory the stock AFM will be maxed out and the PFC is basically 'guessing' how much fuel to inject.

Did a few runs today and I got the occasional knock. Could this be related?

Cheers!

Link to comment
https://www.sau.com.au/forums/topic/190173-would-i-benefit-from-a-z32-afm/
Share on other sites

Type RWKW outside diameter

RB26 - 149RWKW 65mm

RB20/RB25 - 226RWKW 80mm

Z32 - 255RWKW 80mm

Q45 - 302RWKW 90mm

That is how much a single AFM can handle if it is the GTR it is obviously x 2 so RB26 with 2 AFM = 299RWKW befor they are unefficient

Edited by str00th
  • 2 weeks later...

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

    • Depending on how long the car sat it is very possible for injectors to be stuck open or closed, I'd get them cleaned and flow tested. Other than that, obviously when the loom changes and the car doesn't start any more....the loom is suspect so some tracing / comparing may be required
    • Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
×
×
  • Create New...