AEM F/IC Piggyback

[aurace]

Anyone here used a AEM F/IC Piggyback on the m42?

looking to see if i can firstly remove the afm and secondly have the flexibility to add boost later on.

anyone have an experience with them?

[ose30]

Will not work properly if AFM is removed. Piggy packs are not just cabale to emulate original AFM that well with Motronic installations. You must have some additional hard/software installed to Motronic, so Motronic "knows" you are using either MAF or MAP sensor.

[aurace]

from the website they say : The F/IC can also be used to recalibrate / clamp the MAF sensor, eliminating common problems with non-boosted factory MAFs. The on-board MAP sensor allows for proper fueling in boosted conditions.

so does that mean you can stop stop/level the afm output at a certain point and rely on the map sensors output ? (in +ve boost territory)

also the AEM can retard timing which seems to be more than other piggybacks for the same money.

still interested to hear anyones experiences with them. ?

[ose30]

I have tried several piggy backs (SMT6, AFM Link etc) with MAF & MAP sensors on various Motronic environments. Non of them work perfect, there are some very annoying things how they act. They just do not work smoothly. AFM Link has been so far the best, but unfortunately Link Electromotive in NZ has discontinued this product.

[OKTAY]

Have you guys ever heard of Split Second MAF convertions? I'm seriously thinking about it. In their website there are many old bmw motronic convertions and customers seem happy. The only thing is I don't know anyone who tried their maf kit on m42... If I lived in US I would definitely try by now. Anyway I guess I will be the guinea pig for this time...

[aurace]

got any details?

[ose30]

Split Second system is very old. It was widely used for example on Porsche 944 Turbo applications. Very difficult to tune up (don't ask how i know). I would skip it. Go either Mega or Vems if you would like to get rid of AFM.

[Bunta]

Split Second has been used for many years.
Nobody likes it anymore.

Ive thought about using it on my car(I have one lying around I got for free) but am leary of it since people have problem with it properly holding a tune and generally changing to lean conditions.

If money was no option id get this.
http://store.nexternal.com/shared/StoreFront/default.asp?CS=vacmotors&StoreType=BtoC&Count1=740245997&Count2=657386422&CategoryID=166&Target=products.asp





Hunter

[ose30]

Nobody likes it anymore.


+1

[OKTAY]

Are you guys talking about the kit that you adjust yourself from the cockpit on the run or the other one you adjust with its software with laptop on the dyno? Which one doesn't work? Both?
I personally thought of buying easy to use one that you install it in the cockpit and adjust the knobs by looking at the Air/Fuel ratio meter. Now after our comments I don't know...

to Bunta: I don't want to go for completely new management. If it was a 76 Ford Escort that is what I would do but, it's a car that already has a motronic injection system.

to ose30: I have been reading all your posts and I know you have knowledge so please tell me what is available and doable? I do not want to spend 1000's for 5-10 hp,
it needs to be plug and play kit that millermotorsport intended to do and failed,
I have been waiting for bmwman91 to produce and sell his kit since from 2005, and still waiting?
So that's why I was thinking about SS MAF convertion kit because it's the only one in the market available. as far as I know. I might be wrong.
Oh I forgot to mention, dbilas has Alpha N control unit around 800 euros and I think it is using MAP sensor not a MAF. I am willing to try that too but, once again I don't know if anyone who tried and succeeded that kit and I don't know if any eprom programming required. Their website doesn't give much information.

[OKTAY]

Any answers guys?

[ose30]

to ose30: I have been reading all your posts and I know you have knowledge so please tell me what is available and doable? I do not want to spend 1000's for 5-10 hp,

Best piggy pack so far i have tested to replace AFM is Link Electromotives "AFM LINK". Unfortunately this product has been discontinued. Try to locate a used one, many BMW & Porsche 944 Turbo owner has been used it. This box has built in MAP sensor, works quite OK, was developed years ago mainly for N/A BMW applications, but was also adopted by 944 Turbo owners. Register to "Rennlist", there are occasionally these boxes for sale.

[ludiagsm]

I use smt6 and don't have problems with removing afm i thing that somone makes mistakes :) it is not simple to do that konversion but it is a fact i made this on my E36 318is-turbo and my friend e30 318is-turbo and soon i will do that on my 316 turbo too.

Ose when you remuve afm what you do with air temp sensor who is mounted there? Bacuse if you not connect another with close parameters or the same sensor it is normal that you don't have positive results ;)

And in the and everyone of you must use wide band afr meter like lc1 with gauge or better one becouse you must see what happens with air fuel ratio when you simulate afm meter.

[ose30]

Ose when you remuve afm what you do with air temp sensor who is mounted there? Bacuse if you not connect another with close parameters or the same sensor it is normal that you don't have positive results

I have use OEM temp sensor taken from AFM. Without it system does not work properly.

[ludiagsm]

I have use OEM temp sensor taken from AFM. Without it system does not work properly.

:rolleyes::rolleyes::rolleyes: with smt6 and other pygys using the original air temp sensor you can have the same result :cool:

[ludiagsm]

here is 2 pics i just made that sensor using old corpuse from water temp sensor some drill work little soldering two short wires and poxipol :) http://img530.imageshack.us/img530/3746/09112008404ys9.th.jpg (http://img530.imageshack.us/my.php?image=09112008404ys9.jpg)http://img530.imageshack.us/images/thpix.gif (http://g.imageshack.us/thpix.php) http://img527.imageshack.us/img527/2923/09112008405xg9.th.jpg (http://img527.imageshack.us/my.php?image=09112008405xg9.jpg) one of the pins must be on ground and another on the ecu air temp pin

[justin11572]

I use the MAPECU in my S14...no problem. Check out their website www.mapecu.com

they have a couple BMWs with boost!

[ose30]

Interesting product. Seems to have a lot of functions which good old AFM LINK had.