Jump to content
SAU Community

Recommended Posts

so basically it is possible to use if you re wire it in and re-map the ECU to use it, similar to a Z32 on rb20..

where as a S1 AFM would be direct plug in replacement, but would still need a re-mapped ecu ??

No need to remap, they both have the same 0-5V output per same gm/air sec entering engine.

Re-wire to suit and its apples :down:

You only need to remap if you change to a Z32/Q45 AFM as these read less Volts per gm/air entering engine.

Edited by RB30-POWER

if they run the sam voltages, there isn't really any reason to upgrade then is there..

there shouldn't be any difference in them at all as they are both 80mm..??

but i swear i read somewhere that the rb20 items cant handle as much power as a rb25 item.

Craved, the r33 s1 and r32 afm's are most definitely the same.

From observations the R33 and R32 PowerFC airflow curves do vary slightly.

It appear the r33 airflow curve returns a higher load/airflow for a given afm voltage. SO possibly this is where you may see r33's making the same power as r32's on the same afm voltage.

I'm not completely sure what directly affects the airflow curve, maybe engine efficiency.. I have no idea.

The rb20/25 afm's have different airflow curves in the s13/s14 pfc's also.. Go figure.. :( I have no idea why.

so theoretically if the R33 afm shows the same voltage for a higher air flow through it, that would mean that if you swapped the AFM's the RB20 would run leaner without changing anything.

doesn't sound nice if i have read what you said correctly Joel.

No... :(

The airflow curves are located within the ecu. So the physical afm, there is ZERO difference.

All ECU's contain different airflow curves for a given afm.

So the same afm on different ecu's will return a slightly different load value. As previously said I am not sure why the airflow curves are different UNLESS it has some thing to do with engine efficiency. No idea. :(

I shouldn't have gone so in depth, only confuses. :(

I've had both afm's on the dyno on my R32 RB20DET many years ago. There was no difference. Exactly 100% the same afr ratios. :)

hmmm, so afr's are still the same, and all I need to do is rewire?

Now that I can do.

If/when I do it, I'll post up some pics.

(If engine blows up, I will come looking for cubes and kill him... :( )

:(

if they run the sam voltages, there isn't really any reason to upgrade then is there..

I wasn't under the impression the guy was looking to upgrade, more so just replace a faulty AFM with another he had lieing around.

hehe i hadn't spoken to wil about why he was doing it, i sort of hijacked it a little to see if there is an other reason to change them over for power gains.. while still getting his question answered

this is only since i was under the impression that the rb20 afm was only good for about 200rwkw, then rb25 was 250ish rwkw then 300+ for the z32 ..

there'd be no difference between the r32 one and the series1 afm, as they are the same unit.. the only difference is the s2 one as per above.

where they actually run out of resolution and effectively the power they can make may be different because of the different head flow between the rb20 and rb25 heads. Thats why people probably come to the conclusion they make different power, therefore they are different.. no the afm is the same, the engines are different :mad:

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

    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
×
×
  • Create New...