Zero10

I have a very bizarre idea, but before I decide if it's practical or not, I need to know are the N/A and turbo AFM's the same size?
That is, could I bolt a N/A AFM in where my turbo AFM is? (I know the signal will be all wrong, and about the early/late voltage differences, I am just asking about size)

Also, while I'm asking this, what size is the outlet of the AFM? (diameter)

Zero10

Nobody knows?....

testarossa_td

Not the same size...I have thought along those lines as well
I took some picts and measurements, but it was several years ago...I will see if I can find them.

In the mean time.
http://www.frwilk.com/944dme/afm.htm

Zero10

Hmm, have you really thought along the same lines as me?...
*cough* *cough* *co-MAF mounted in the stock AFM housing with the signal converter mounted under the electronics cap on top-ugh*...

Man, I must have a bad cold
I don't want to get into details, but I am aiming to make a 100% stock looking MAF conversion. No I will not be selling these, and please don't start a group buy or anything. I have no intentions of competing with the already well established vendors around here, I just want to make something for myself.
I have a spare AFM from an 83, and I was hoping it would be the same as the one in my 951. I guess it's not.
I guess I need to buy a used (preferably bad) 951 AFM to pull apart. I don't have the cash for this project for another month, but I am in the planning stage right now.

testarossa_td

Nope. Just along the same lines of AFM(44vs51) size.....and maybe a few of your other points

Good luck.

Mike Murcia

Zero, I have a 951 AFM that I dissected to extract the temp sensor. It's not mutilated, just taken apart. If you want it, let me know. Cool project.

Zero10

Very interested if you will let it go cheap
I need a bit of time to come up with any money at all, but I am interested.
Thanks for the offer!

I have seen the temperature-resistance graph for the AFM's, so if I decide I need a temp sensor I can buy another.

Mike Murcia

It's yours for shipping. PM me your address and I'll get it out to you.

CVambience

I think they are the same size. When I bought my S2, it had a turbo AFM installed. I was told that the turbo AFM yields more gas into the engine thus producing more power. That AFM did work for a while (and I was happy w/ the performance) before I started to have stalling problem; then I switched it to a S2 AFM. I am not sure the stalling problem has anything to do w/ the turbo AFM not compatible w/ S2 engine or simply because that AFM was malfunctioning. I suspect my ECU was modified too (It's a 89 S2 ECU and my car is a 91 S2), because the performance chips I bought (one Promax and two from eBay) could never work in this ECU. I had to send my stock chip to Promax and have them custom made a chip in order to have it work in my ECU. Has anyone ever had problems w/ perfromace chips not working in their ECUs?

Eric

Zero10

Maybe they are the same size for turbo-s2, but I have an 83 n/a AFM, and hosrom doesn't think they are the same size.
Plus, I'll be getting a correct one now