My AFM to MAF conversion

[Tom]

to get the ball rolling, here's the first tech article from me.======================================Hi guys,I finally did my AFM to MAF Conversion I love it so so much. The response is just fanstastic. no more stupid AFM flap to restrict the flow, most people who are like me would know that the revs will drop below idle sometime if we quickly depress and press the accellerator pedal. it's gone now and the air flow is just awesome. you have to feel it to believe it man.ok, let's talk about how it's done,i bought a 1998 E39 525i Siemens MAF, an aluminium connector hose, a silicon connector, and a 3" inlet Pipercross air filterYou need some sort of a chip or A/F device to tune the ECU to recognize the new air flow device.In this case, the Unichip and Unichip tecnician did all the signal adjustments, conversion and a/f settings. The plug to to the MAF will tap the ones from the former AFM and modified slightly. Air Temperature sensor isn't use in my application. instead, the ohms of a wire were changed to "cheat" the ECU of the air Temp sensor being there and there's only 1 reading which is a permanent reading that will never change according to temperature. Plus the air Temperature in Asia don't vary much, so i'm not worried about it.it's quite techincal which i ddin't really get to absorb much. anyway, i gained 5RWHP on top of the 160RWHP i had before MAF which was pretty good. but what's important was the engine response that i'm really happy with. No graphs and charts due to the faulty printer..but there are pics. so enjoy!cheersTom

 

[mrhartge]

tom,apologies for my ignorance but does it work forL-jet or its just for Motronic v1 & v2???btw,great job with the forum

 

[teejay]

oi,i have been teaching you all these while you don't listen ka.....cipei....!!! maybe too much eating the tambun biskut.....!!!! kene sai.....

 

[mrhartge]

Originally posted by teejay@Dec 4 2004, 05:51 AM oi,i have been teaching you all these while you don't listen ka.....cipei....!!! maybe too much eating the tambun biskut.....!!!! kene sai.....
brudder,all the alcohol fried my brain cells lar...fogoten aleady....don angry-angry, cepat tua wooo.... can xplain again ar

 

[anthony ng]

Wah ... i want this MAF, being sick with my AFM (always ashma after lap lap).Any northern UDM owners try this before ????

 

[Fuhrer]

does the M42 engines come with the MAF already or is it still using AFM?? coz i it looks quite similar to the pictures..fabs? hehe..

 

[flash]

Wow, red hot exhaust...

 

[fabianyee]

Originally posted by Fuhrer@Dec 5 2004, 10:14 AM does the M42 engines come with the MAF already or is it still using AFM?? coz i it looks quite similar to the pictures..fabs? hehe..
M42 still using AFM... that's y I bought an used SMT5 for the intention of a future MAF conversion...Planned to install and tune the SMT5 first then later only install the MAF... Am gathering necessary information for the MAF conversion...psst psst.... has tai ka che been harrassing you when she's down there???

 

[Fuhrer]

hahah..yes i have met up with that particular auntie...even refused to let me pay for drinks..grrr...you guys are lucky to have her all year round! what the heck is SMT5? is that some kind of chip?

 

[elwine30]

It is a piggy back chip. Allows you to tune the ECU of yr car with your own settings.

 

[mrhartge]

Originally posted by fabianyee+Dec 5 2004, 07:36 AM-->QUOTE (fabianyee @ Dec 5 2004, 07:36 AM)

 

[fabianyee]

Originally posted by mrhartge+Dec 7 2004, 02:08 AM-->QUOTE (mrhartge @ Dec 7 2004, 02:08 AM)

Originally posted by fabianyee@Dec 5 2004, 07:36 AM

 

[mrhartge]

Originally posted by fabianyee+Dec 8 2004, 01:32 AM-->QUOTE (fabianyee @ Dec 8 2004, 01:32 AM)

Originally posted by mrhartge@Dec 7 2004, 02:08 AM

Originally posted by fabianyee@Dec 5 2004, 07:36 AM

 

[Strider]

Tom,what is that inline in your yellow ignition cable? Thanks

 

[Jipster]

sum basic questions:can MAF conversion be dun without getting programmable chip i.e. just get the MAF thingy how much for a used MAF anyways?

 

[elwine30]

Jip,You need the chip for MAF as we need to trick some sensors which our cars don't have.Why? Want to convert... ahhahahaaTried Tom's car and the refinement of the engine is superb.

 

[Jipster]

Originally posted by elwine30@Dec 16 2004, 03:10 PM Jip,You need the chip for MAF as we need to trick some sensors which our cars don't have.Why? Want to convert... ahhahahaaTried Tom's car and the refinement of the engine is superb.
no larrr....some harmless researching dats all...u know my car is boggo standard wan ....mabbee K&N Kenanga panel filter later to get summore torque....*torque* *torque* *torque*....'just luv torque.....

 

[ALBundy]

KNN will not give you any torque...

 

[Jipster]

Originally posted by ALBundy@Dec 16 2004, 03:44 PM KNN will not give you any torque...
IJRT....ooops sorry wrong thread...No seriously, u dun think so? I run an auto by the way...any thots on this?

 

[Tom]

strider,it's the accel capacitor thing i think, came with the performance ignition coil kit...jipster,u can't, the signals are significantly different. i could only idle(not well) when i wired the MAF in through the AFM Cable. used MAF would cost about RM250-400+ depending on the shops...but it's still cheaper than an AFM...