answer to afm upgrade?

EA-73-XA · Post by **EA-73-XA** » Sat Sep 15, 2012 1:20 pm

http://www.ebay.com.au/itm/Apexi-AFC-Ai ... 337c0cf1ad

Post by **shanec86** » Mon Sep 17, 2012 6:39 pm

doubt it, E15 AFMS are vane type, which kinda stop doing anything after a certain rpm anyway.

Thats to suit hotwire type

Valentich · Post by **Valentich** » Mon Sep 17, 2012 9:57 pm

Hey, maybe someone will know...
Somewhere in the last 3 years, (When I was reading everything I can about these things)
I read an article about upgrading a AMF on a E15T.
What they used was another bigger one (vane type),
and where able to do a swop of the PC board.
As I want to "Keep it Legal" I wanted to try this,
Maybe do a before and after Dyno. Just to see what really happens
Anyway....
I am 100% sure about this article,
but after a computer crash, lost where it was (F@#king Computers)
Has anyone come across anything like that.

PS, I think DFA are fantastic,
cheap way of tuning things a bit,
and again "keeping things looking legal".
.

Post by **shanec86** » Mon Sep 17, 2012 10:07 pm

yeah im pretty sure it was Bjorn who used a Ford Sierra one

Post by **shanec86** » Mon Sep 17, 2012 10:11 pm

yeah there you go

http://www.woken.se/wok/2001/nissan_mant010804_e.htm

ford scorpio which is basically a sierra

photoglossy · Post by **photoglossy** » Tue Sep 18, 2012 4:52 am

An L20ET AFM is an easy upgrade if you're looking for a larger diameter unit. Just open them both up, swap the E15ET chip in, solder it up and go for it. I dont think it really does anything tho.... Just get an aftermarket ECU, they are cheap as chips!

EA-73-XA · Post by **EA-73-XA** » Tue Sep 18, 2012 8:26 am

yes...

but iv seen a rrc e15 wih a hotwire type..

EA-73-XA · Post by **EA-73-XA** » Tue Sep 18, 2012 8:38 am

yes...

but iv seen a rrc e15 wih a hotwire type..

Damo · Post by **Damo** » Tue Sep 18, 2012 9:47 am

It becomes a question of how fast do you want to go. The stocko AFM will have less than 1 psi pressure drop across it at 140kw! If that is too much, rather than going down the path of stuffing around with another AFM which may flow more but cause fueling issues everywhere, why not build in a AFM bypass which opens up at .25psi restriction across the AFM but leaves everything else standard.

Damo

poeticjustice88 · Post by **poeticjustice88** » Tue Sep 18, 2012 9:56 am

i have a rather, "nooby" question. But my car is not running an AFM, so what benefits does an AFM have ?

Michael

Damo · Post by **Damo** » Tue Sep 18, 2012 1:28 pm

poeticjustice88 wrote:i have a rather, "nooby" question. But my car is not running an AFM, so what benefits does an AFM have ?

Michael

Hey Michael, long time no chat.
The benefits of an engine running a AFM is far better light load calculation as air flow is directly related to AFM output, where a map (speed density) sensor relies on a volumetric efficiency table to 'guess' the engine breathing. Map sensed engines can run into big tuning issues with 'big' cams running excessive overlap at low engine speed. The map sensor reads lowish vacuum which indicates large throttle opening which is not the case. Where a AFM only measures the air entering the engine.

Damo

n12et_exa · Post by **n12et_exa** » Wed Sep 19, 2012 11:23 am

i have a mx6 afm i was going to try to fit to my exa it has the larger body and is still the flap style afm has any body tried this befor that anyone knows of????

Damo · Post by **Damo** » Wed Sep 19, 2012 12:25 pm

n12et_exa wrote:i have a mx6 afm i was going to try to fit to my exa it has the larger body and is still the flap style afm has any body tried this befor that anyone knows of????

Re-read the 9th post in this thread and if that doesn't satisfy, do what you like. I can almost without hesitation say that no one has bothered to ever try and adapt a m6x AFM to the E15.

Damo

Callumgw · Post by **Callumgw** » Thu Sep 20, 2012 6:55 pm

I use one from a first series 300zx. and yes I swapped out the circuit board, it had a different style temp sensor... and I had a good board and sensor. Then I tuned it, I have the method somewhere....but it was by ear!.

Did it make a difference? can't say, cause when I put it on I changed lots of other things at the same time.

Actually I wont need it once the Haltech goes in, which is happening now!. . . . slowly . . .

C

baz · Post by **baz** » Thu Sep 20, 2012 9:45 pm

bin the afm & just wack in a haltech, nuff said!