Author Topic: MAF Conversion kit avail (Read 19552 times)

scottiesharpe · « **on:** December 30, 2006, 07:26:34 PM »

I am kind of new to the M42. A friend of mine had a e30 sedan with one and I really fell in love with it. I tinker mostly with my M106 and M88 motors, so the similarity of the M42 to the M88 made me feel right at home.

I began to search craigslist for a 91 318i and I was lucky to find a convertible, so I picked it up. Loving it! It's my daily ride.

My partner and I make performance mods to BMWs and I run the BMWturboperformance.com website.

We have a line of MAF conversion kits for S38/M88, M20, M30 and M106 motors on that web site.

This weekend we made up an MAF conversion to the 318ic and it works extremely well. We used the same design as our M20 kit. The sensor housing is all billet aluminum and mounts directly to the airbox just like our other AFM elimination kits. There are no piggybacks. All the programming is done on the Mot chip and we supply you the chip with the kit. Just remove your current barn door sensor box, slip in the Miller sensor, swap chips and you're done.

No more moving parts, no more barn door!

We can also provide custom tuning chips for mods, and we can tune your car for you if you run high compression, forced induction, etc.

If you guys are interested in an MAF for your M42, let me know and I'll make up more. If you would like a unit made for your car, or you have any questions, just email me and let me know.

doucy2 · « **Reply #1 on:** December 30, 2006, 08:27:36 PM »

hey bro def wanna hear some more details and a price and some numbers on addition to performance.

e9nine · « **Reply #2 on:** December 30, 2006, 08:36:28 PM »

Any info on pricing, before/after dyno, hardware options etc?

FL318is · « **Reply #3 on:** December 30, 2006, 08:55:21 PM »

Not knowing the diff between an eclipse and a cresent wrench puts me at a disadvantage. But, I thought bmwman91 had his ready for market?

scottiesharpe · « **Reply #4 on:** December 30, 2006, 11:38:25 PM »

Well I don't know the difference between an eclipse and a crescent wrench either.

MAF doesn't really give you more power. You are simply replacing an old fashioned measuring device (door and spring) with a modern measuring device (hotwire). Sure there is some restriction in the air path removed, but it so tiny, the net gains are pretty small.

The real benefit to MAF is that there are no moving parts to wear out and there is no door-on-a-spring to oscillate everytime you slam the throttle open or closed. (This is especially problematic on turbo cars.) SO the signal output is much clearer on the MAF and the ECU likes this a lot. So your drivability will improve quite a lot, especially mid thottle response.

You will notice this even more if you have an old worn out AFM with door hinges that are dragging, a carbon track that is worn out and dusty, and a spring that is getting tired.

We reprogram the Motronic via a chip to read the output of the MAF signal. There are no piggyback boxes, although you can run one if you wish (so you can make changes with your laptop computer - even while the car is running).

The price I expect will be the same as our M20 kit. It's $595. Group buys are welcomed.

Here's a link to the M20 kit. I haven't put the M42 kit on the web site yet.

http://scottiesharpe.com/store/products.asp?id=12

I live in San Jose, so if you are in the bay and you want a look-see, just drop me a line.

Have a happy new year. I'm hoping for a nice day; I'm gonna drop the top on the 318ic and take the wife for a cruise up through wine country!

Gunni · « **Reply #5 on:** December 31, 2006, 12:02:55 AM »

$595 for more drivability and better mid throttle response?

$350 for a SMT6 piggyback and you can use anything to measure the load you like, and you can adjust ignition timing as well,
Sorry but your kit is kinda expensive for what the gains are

scottiesharpe · « **Reply #6 on:** December 31, 2006, 01:21:17 AM »

You can adjust fuel and ignition timing with just a simple eprom reader/writer.

595 is not too bad. Have you priced a new AFM lately?

tim_s · « **Reply #7 on:** December 31, 2006, 02:57:09 AM »

I think the price is competitive. As much as I like the perfect power unit, how can you compare the two? With the perfect power, you'd need to hack apart the standard wiring, hook up a wideband lambda and a laptop and tune to get optimum performance/AFRs that you could get with the much neater solution of a custom chip + MAF combo that is proposed here. Plus you need knowledge and time to do so.
Scottiesharpe, if you were in the UK, I'd pay this and more, provided you could tune to my particular engine (2.1 and ITBs).

Gunni · « **Reply #8 on:** December 31, 2006, 06:34:02 AM »

I�m just saying,, Wideband kit is $274 and often less.

As is with all custom chip solutions they aren�t optimum , they can�t be as they need to fit multiple cars.

I can�t say how much time needs to go into a MAF or a MAP swap on a M42, but I can tell you it�s not all that horrible black magic people think it is.

scottiesharpe · « **Reply #9 on:** December 31, 2006, 03:08:24 PM »

Gunni - Yeah you are right. It's not that hard. We have been doing it on the other AFM BMW motors and the results are great. The afm system is the weakest link on many of the 80's era bmw motors. When you get rid of it, you really have a much more modern fuel control.

I guess the advantage is that I have already tuned the chip and you won't have to tune anything. just pop the chip in, swap in the MAF (there are 4 wires that get wired into your old AFM harness) and you are all set.

Tim S - If I get a few guys interested, it will bring down my machining costs and I can offer it a bit cheaper. Unlike my M30/M20 kits, I don't have any experience with the market demand for the M42 kit, although I think this engine was also used in the e36 cars well into the 90's. You guys can correct me if I'm wrong. (This 91 318ic is the newest BMW I've ever owned!!!!!)

Vladi · « **Reply #10 on:** December 31, 2006, 05:56:32 PM »

The only thing common between the M42 used on E30's and the M42 used on E36's is the engine block,oil pump and AFM.

Everything else is different.

e9nine · « **Reply #11 on:** December 31, 2006, 06:21:42 PM »

Scottie - surely the power curves will reflect some when you go with a MAF. With the power delivery being altered, the dyno plot just helps to further justify the investment for such anciliaries as there's something visual to show the before and after plots which might even show a difference in the area under the curve.

Not that most on here are dying for such a project as a quick search will show you 2 other people on here are driving m42s with afm deletions and a few with some builds in progress - this gives an indication of the expected demand/supply for our group - but it just helps to better associate the product with value before money is forked over as you didn't provide too much info earlier.

E30own'er · « **Reply #12 on:** January 02, 2007, 03:38:44 AM »

small question i got old MAF and other stuff but i wounder if i can custom it on my bmw with a chip that one of you might have ...question is would it work and how much ?

Alpine003 · « **Reply #13 on:** January 02, 2007, 09:17:46 AM »

Quote from: scottiesharpe;16521

You can adjust fuel and ignition timing with just a simple eprom reader/writer.

:lol

If it were that easy, I would already be doing it as I've had my eprom burner for a few years now. I think you forgot to mention a particular software(or a machine language guru).

bmwman91 · « **Reply #14 on:** January 02, 2007, 01:30:01 PM »

You did not happen to have any odd resonance issues between ~2500-3000RPM dod you? Although I suppose we are competitors of sorts, I would be interested to see if others have noticed this on the M42. It got worked out, but it was definitely interesting.