M30 AFM converted for the E30

[--alpina--]

Hi i need some expert help, im planning on fitting an m30 535 air flow meter.. would if fit as the inlet bore is larger, or possibly is there a way i can modify the internals of an E30 325 airflow parts into the M30 airflow meter. i did remeber a long while back that there was an article/link to a site of this mod, if anyone can help, i would be very gratefull...



jimi

[aus325]

Here's a link for you........

http://www.davelength.net/car/bigsix.html




Hope it answers your questions,

Paul

[--alpina--]

Paul..... thats the link i remember, i thank you very much for this... its that i had it in mind to do this conversion a long time ago and yesterday i went to a bme breakers and got my self an oil cooler and also asked how much an air flow meter was, and the guy said i have abroken one you can have .. after i said what i was going to do with it, so it was ideal and got it free.. so now might do a little experiment with it...

Again cheers mate...


Jimi

[aus325]

No worries Jimi, there are a few threads over on e30tech about people trying this. I think the general concensus is that it's probably not worth the effort, unless you already have a dodgy AFM on your car.
But seeing as it hasn't cost you anything so far, then it should be an interesting experiment for you.

Good luck, and post up your results.



Paul

[--alpina--]

Hi paul, if i had a dodgy air flow meter say... what kind of problems would i have in my car as regards to driving? Ill give it a try, if it works then great but if not well i have a nice bin i can use, ill take pix and a step by step guide of how to do it which will guide other E30 owners in this mod...

Just out or curiosity, why do you think it wouldnt be worth doin?


Jim

[E30Adam]

Don't bother with eh M30 AFM, it's a total waste of time.

I had one set up on a dyno and it lost me 8bhp over the standard AFM. All this talk of improvements is rubbish. Tried and tested, bin the idea.

[--alpina--]

daaamn, so that link to the website, how comes he says it gave him extra BHP? ive gutted out the M30 AFM and painted it up, then was going to transplant the electrics from the E30 AFM.......... in two minds now what to do... id thought the more air you need the higher the fuel you adjust with the powerboost to compensate for more power..


Jimi

[E30Adam]

daaamn, so that link to the website, how comes he says it gave him extra BHP? ive gutted out the M30 AFM and painted it up, then was going to transplant the electrics from the E30 AFM.......... in two minds now what to do... id thought the more air you need the higher the fuel you adjust with the powerboost to compensate for more power..


Jimi

Nice in theory but it really doesn't work in practice. The standard airbox is actually pretty good and draws relatively cold air from outside. Using an M30 AFM, you'll need to use a cone filter because of the difference in opening which of course draws in hot air from the engine bay.

The AFM is a very poor design anyway, the air has to push it's way past a heavy mechanical flap causing resistance. If you want to improve the air intake them go megasquirt where you can ditch this alltogether and have a straight through pipe with no resistance at all.

I'm using a mapped MAF with hotwire from the later E36 and the throttle resonse is awesome but it's not a cheap mod.

I honestly wouldnt bother with the M30 AFM. You've got to faff about with adjusting the spring tension inside as well and you'll never get it spot on.

[--alpina--]

Hi E30adam, thanks for replying, tell me this Mapped Maf with hotwire from the later E36 , what is that? is it easy to do ? and does it run on motronic system? or has it got anything to do with megasquirt?

Any info on this, i would be most gratefull..


Cheers Mate

jimi

[Speedtouch]

There's the Miller MAF which seems pretty good (I have one on my '88 325iSE). These threads give some info:
http://www.e30zone.net/modules.php?name ... highlight=
http://www.e30zone.net/modules.php?name ... hlight=maf

Hopefully going to rolling-road mine at Bexleys on 5th Feb...

Cheers,

[E30Adam]

Hi E30adam, thanks for replying, tell me this Mapped Maf with hotwire from the later E36 , what is that? is it easy to do ? and does it run on motronic system? or has it got anything to do with megasquirt?

Any info on this, i would be most gratefull..


Cheers Mate

jimi

The MAF stand for Mass Air Flow unit. There's no mechanical flap inside to restrict flow just a "hot" wire that detects air flow. One downside of the MAF is that there's no IAT (Air Intake Air Temperature) sensor on a MAf so when the engine's cold, it will be pretty rough for a while. You'll need a piggyback ECU mapped to control the MAF of some description.

A better method is the Megasquirt which replaces all of this and is the next step up and I wish I'd opted for this. Ant on this forum (one of the mods) can supply and fit Megasquirt and I don't know a lot about it but understand that it's very easy to tweak and gives some excellent results.!

Incidentally, it was at Bexleys rolling road day a few years back that we tested the M30 AFM! If you're going to this years Bexley day then have a word with Sal (M5 Pilot) the organiser and ask him about it.

[Speedtouch]

The Miller MAF has an IAT built in. Nice and smooth even from a cold start

[--alpina--]

Hey maurice, good to hear you have one and also going for a run at bexleys, just a quick question i have a 2.7 engine with a copied ALPINA C2 2.7 chip also with a shrick race cam, does that mean i have to take the chip out and replace with millers chip?? also the setup that miller does is for the 325i not for the 2.7 build... so in reality what do i order from millers, ok the air flow meter looks good, but regards to the millers chipit wont match my engine, what do i do? also if its re-mappable chip how is that done? would it need to go on rolling road for that cos then thats even more money out of my pocket when thinking all you do is plug `n play if you know what i mean, is there any other air flow meters from any bmw i could plug in that say make any difference? if so, im all ears.

Thanks For Your Reply.

Jimi

[Speedtouch]

Miller can cater for the 2.7 and even turbo installs. You just need to specify: your engine spec, grade of fuel you want to run on (eg, 95 RON for UK), and rev limit: standard chip is 6,500rpm, they'll do up to 7,000rpm if you want, possibly more! E-mail the man man there, Dan Miller, and ask is my advice.

[aus325]

There's the Miller MAF which seems pretty good (I have one on my '88 325iSE). These threads give some info:
http://www.e30zone.net/modules.php?name ... highlight=
http://www.e30zone.net/modules.php?name ... hlight=maf

Hopefully going to rolling-road mine at Bexleys on 5th Feb...

Cheers,

Will be interested to hear your rolling-road results with the Miller kit if you get there.. Do you have any pre-MAF results with which to make a comparison?

[--alpina--]

What RPM`s do you reckon our cars should go up to if i was to order a MAF with its custom chip as I have a 2.7 engine so whats the limit is advisable, have a shrick 284` cam and an alpina C2 2.7 chip also..



jimi

[Onz]

i am also interested in this. any rolling road figures yet guys?