Single Afm On A Rb26

[Bsa]

Is this possible can you make it to think there are 2 afm? I'll be using a nistune board reason for wanting a single afm is 1 I'll be running a single turbo and 2 I don't have much room to run twin filters. Im wanting to run afm in cooler piping as well and a single would make fab so much easier

[zebra]

I recall a thread from years ago, it was either getting a Single AFM on a GTR or 2 AFM's on an RB25, but there was mention of a JAP signal bender thing that could do it

Possibly a SAFC or similar.

Can't remember the outcome though sorry but I have a funny feeling it didnt work

[Sinista32]

Maybe a single AFM would work as is.

Wouldn't in normal circumstances take the average of both. So why not the average of 1 ?

Sort of like a single 02 in one of the 2 dumps ....

Just to qualify this thought. I dont know sh!t

and to add to this thread not being a smart arse - do we have a search function in this new version ?

[Bsa]

I can't search Sau only google so no.

[DVS JEZ]

I will have a chat with nistune and see if we can trick it inside the ecu. If i join the signal wires then see if i can select a single afm without halving the value's inside the software it way work.

[Bsa]

Thanks man if we can't I'll have to make 2 y pipes to hold the afm in the cooler piping

[GTScotT]

Hang on a second... An RB26 ECU was able to start and run my stock R33, simple plug in job.

Why don't you dummies put an R32 ECU in it and switch a couple of wires around. Voila, single AFM ECU.

I mean you don't HAVE a RB26 Nistune yet do you Blake?

[Bsa]

Not yet I don't have a rb20 ecu either but I have a rb26 ecu

[GTScotT]

The last RB20 ECU I bought was $30

It will plug in, all you need to do is swap a couple of wires and you will have a single AFM ECU in the car. Simple as that.

If I can do it, you can do it.

www.paulr33.com

EDIT: R32 RB20 and RB26 ecu's all use the nistune type 2 board. So you are really at no disadvantage to Nistune an RB20 board. Later if you decide to go back to twins you can just move your Nistune to the RB26 ECU and swap the pins back, making it twin AFM.

Ummmmm simple? Yes.

[kitto]

The RB20 ECU doesnt have an input for the intake air temp though..

If you could get the RB20 ECU to work, it would solve the twin afm and twin O2 sensor issue..

[Bsa]

I would need a rb20 tps I'm guessing

[DVS JEZ]

The last RB20 ECU I bought was $30

It will plug in, all you need to do is swap a couple of wires and you will have a single AFM ECU in the car. Simple as that.

If I can do it, you can do it.

www.paulr33.com

EDIT: R32 RB20 and RB26 ecu's all use the nistune type 2 board. So you are really at no disadvantage to Nistune an RB20 board. Later if you decide to go back to twins you can just move your Nistune to the RB26 ECU and swap the pins back, making it twin AFM.

Ummmmm simple? Yes.

Would need a board reprogramme though

[GTScotT]

That cant be that hard Jez

I was also under the impression the RB26 and RB20 TPS are compatible.

Lead to believe so by use of RB26 PFC on RB20s

[Risking]

You'll also need a new set of injectors if you plan to use an rb20 ecu.

[Bsa]

Got some already dam BMW pain in the ass hope this is all worth it

[BOOZTJUNKEY]

Hey Blake there is a member on here his name is kristafa I think he has a black BMW 318i that he put a 26 into when I spoke to him he seem to be in the know of dos and donts with the conversion

Not relevant to the post but in general still usefull to u

[paulr33]

you can use one airflow meter and parrallel up the signal wire to both inputs on the GTR ECU to make it thinks it has two AFMs

the ECU does an average of both airflow meters, so it is basically the same thing

the device you might be thinking of is the later SAFC II that lets you manipulate the AFMs to either single or twin AFM on single or twin AFM car

that is, run twin AFMS on a single AFM car, or run single AFM on twin AFM car

ther other device you might be thinking of is the HKS VPC or vein pressure converter that converts MAP to AFM

[zebra]

the device you might be thinking of is the later SAFC II that lets you manipulate the AFMs to either single or twin AFM on single or twin AFM car

that is, run twin AFMS on a single AFM car, or run single AFM on twin AFM car

This!

Is what I was thinking

[DVS JEZ]

you can use one airflow meter and parrallel up the signal wire to both inputs on the GTR ECU to make it thinks it has two AFMs

the ECU does an average of both airflow meters, so it is basically the same thing

the device you might be thinking of is the later SAFC II that lets you manipulate the AFMs to either single or twin AFM on single or twin AFM car

that is, run twin AFMS on a single AFM car, **or run single AFM on twin AFM car**

Isnt that the same thing? As joining the signal wires.

I have never attempted this but heard that it couldnt be done as the nissan ecu halves the value's for the afms.

But as u say if u join the signal wire they shoukd read the same any way

[Bsa]

I was thinking that to just joining the signal wires I'll be doing the wiring myself and it's my first attempt at anything like this so having everything I need is handy I'll be doing it on Sunday I'll let everyone know if it works