The Miller Performance MAF 944 Conversion is HERE!!!

[ewalt98]

I always knew the BMWs were good for something!
(says a former/future BMW owner.....)

Brody, this does seem like the perfect combination of price and upgrade for an item that many of us have wanted for a while. I've never pursued it because of the cost involved, but not now. I can envision the MAF making for a nicer driving experience with the change in throttle response, while at the same time eliminating the potentiometer issues.

Thanks for your work.

[brody]

Thank you everyone for the positive words. As time goes on, watch our homepage as that is where we release important information about new and upcoming products or application coverage.

It took us 5 years to get the price down to where it is while keeping or increasing quality so a preemptive thanks for those that will become our supporting customers!

[HondaDustR]

Actually, the 24 to 28 pin change happened sometime in 87. I know because mine is 28 pin when it generally speaking should be 24 pin. It is easier to run a 24 pin in a 28 pin setup than the other way around, though. Just clip the jumper and install the chip with pin 1 on the chip backspaced 2 pins from pin 1 on the socket. 86 to 88 Conversion ML3.1


Brody, any chance you will offer a tuning specifically for cars with no cat, or tuned for higher octane fuel?

[TheStig]

It's been 3 years since I have had a 944. This is absolutely interesting. I have to get one again just to try the MAF!

[brody]

Originally Posted by HondaDustR

Brody, any chance you will offer a tuning specifically for cars with no cat, or tuned for higher octane fuel?

There is always our WAR Chip that will let you do what you want with our base files.

Revolutionary BMW Performance Chips

Because we can't cover every single conversion/mod/fuel/preference out there in a timely manner, the WAR Chip will let you accomplish what ever fine tuning you want/need from our base files.

Again, we started with the BMW scene, the WAR Chip is end user adjustable, it has allowed many customers who have a deviation of a set up we have a tune for to use our products, and evolve their tune as their engine hardware evolves. It really is the last performance chip you would ever need to buy and as of right now, you can use it in nearly ALL OBDI BMW's and we are getting there for Porsche. It is the same hardware for all cars, the only difference is what tune you load on it.

[atomicoverload]

Mine was manufactured in late '84, but is technically an "85.1". My ECU is from an '87 and is 24pin so I wonder if yours was manufactured in late '87 making it an "88.1" with 28pin ECU, but maybe not the other features.

[CatsEyes]

Originally Posted by HondaDustR

Brody, any chance you will offer a tuning specifically for cars with no cat, or tuned for higher octane fuel?

The fuel thing will be an issue for those of us outside North America. The Euro-spec car was tuned to run on fuel of around 97 RON (from memory: I can check the factory manual and driver's handbook)). So that's a significant difference.

On the other hand, a chip for Euro-spec octane-rated cars would also widen your market considerably...

[J1NX3D]

Definitely 98 RON. This was my main concern when talking with Russell for one of his chips. My car is a RoW '86 with no cat as stock and I use 98 RON, which apparently isn't as good as 98 RON in Japan or Europe. Maybe Aussie as well?
Russells only concern was he wanted the number on the chip so he could confirm if it had an o2 sensor or not. The 24 pin chip he sent me went in no worries, ran as cool as stock, didn't idle much different from stock and when driving the gains were immediately noticeable with part throttle with a much more usable powerband. It was much smoother than stock when accelerating through the rev range and freer revving too.
I don't really see Miller having that much of a problem with tuning for RoW cars when they're so established with BMWs but I'll be highlighting these same concerns to them if i go ahead and buy one of their MAFs.

[alfadoc]

Can't wait for a version for the S2!

[mhart]

Originally Posted by brody

As promised, here is the first dyno. The reason we have not released this sheet on our website is the car is an automatic, we like to use Manual Transmission cars for the published results.

IGNORE THE HUMONGOUS GAP BELOW 2600 RPM That was an issue we were having with inconsistent kick down, until we disabled it. Another reason why using manual trans cars no the dyno is better..

Before: 121 WHP 122 WTQ
After: 132 WHP 130 WTQ



As you can see, the power is gained through the entire RPM band, and maintained the entire way. This particular car gained 11 PEAK WHP, and 8 PEAK WTQ. There are areas of torque where the gain is higher than 8, but because it isn't the peak number, the report doesn't list it.

As soon as we get a manual transmission car on the dyno, I will post up proper sheets.

Here is a picture of our MAF using our air box adapter to retain the stock box.



Thanks to those of you who emailed me over night let me know what else I can do. Also, if there are any trolls watching this thread who are local to us, if you are interested in helping us so we can get more tunes for more platforms, by all means contact us and we will discuss options.

The dyno gains look great, but if I'm reading it correctly, those Air/Fuel ratios look pretty high (16.2 it says?). Did you run into any issues with detonation?

[brody]

Originally Posted by mhart

The dyno gains look great, but if I'm reading it correctly, those Air/Fuel ratios look pretty high (16.2 it says?). Did you run into any issues with detonation?

This is one thing that has plagued our dyno, the Innovate unit that is built into the dyno displays a proper reading, but after it filters into the computer and onto the screen for print out there is signal loss, and it reads .5 to 1 full point leaner than the real world reading. Mustang has never been able to help resolve the problem. It is trivial though, the LM unit is 100% spot on, and we use the graph to see how smooth the AFR is, because after all that is key as well.

Also, all cars we tune or just dyno, start off around 14 - 15 AFR and dip down to their open loop WOT fuel ratios. There is no pinging at that point and when the AFR is critical, it has already dropped down to the proper or "safe" level.

[mhart]

Originally Posted by brody

This is one thing that has plagued our dyno, the Innovate unit that is built into the dyno displays a proper reading, but after it filters into the computer and onto the screen for print out there is signal loss, and it reads .5 to 1 full point leaner than the real world reading. Mustang has never been able to help resolve the problem. It is trivial though, the LM unit is 100% spot on, and we use the graph to see how smooth the AFR is, because after all that is key as well.

Also, all cars we tune or just dyno, start off around 14 - 15 AFR and dip down to their open loop WOT fuel ratios. There is no pinging at that point and when the AFR is critical, it has already dropped down to the proper or "safe" level.

Thanks for clarifying, so most of the WOT run the AFR was in the 12-13 range? How about partial-throttle - is it comparable to OEM?

I've spent some time setting up a dynamometer, so I can appreciate how tough it is to get some of the weird bugs that come up sorted out (the one that I worked on was an engine dyno, and for a while the throttle controller would oscillate like a metronome when it was supposed to be steady-state WOT...I ended up doing a fair bit of tuning just holding a throttle cable as a result!).

Also, I noticed on your website that you make turbo kits for BMW's. Any chance that a 944 n/a turbo kit might be in the works?

[944meister]

brody, do you have a maf conversion for a 3.0L 944 s2? i would really like to upgrade to your maf rather than buying a new afm for my car!!!

[RedBaron]

When they release them for the entire 944 series, I hope we can do a huge group buy on rennlist and get a discount.

[BuckarooBanzi]

Originally Posted by 944meister

brody, do you have a maf conversion for a 3.0l 944 s2? I would really like to upgrade to your maf rather than buying a new afm for my car!!!

+1


-bb

[billy mild]

Any plans for a turbo maf kit?

[brody]

Originally Posted by mhart

Thanks for clarifying, so most of the WOT run the AFR was in the 12-13 range? How about partial-throttle - is it comparable to OEM?

I've spent some time setting up a dynamometer, so I can appreciate how tough it is to get some of the weird bugs that come up sorted out (the one that I worked on was an engine dyno, and for a while the throttle controller would oscillate like a metronome when it was supposed to be steady-state WOT...I ended up doing a fair bit of tuning just holding a throttle cable as a result!).

Also, I noticed on your website that you make turbo kits for BMW's. Any chance that a 944 n/a turbo kit might be in the works?

Yes, the AFR is in the mid 12's to 13 for WOT.

It is hard to dyno part throttle, but yes, it is the same or better than OEM. You will just have to ask those that have one. There will be another fellow soon as his was sent out last week.

We don't plan on doing any turbo kits.

Originally Posted by billy mild

Any plans for a turbo maf kit?

Yes, we have a turbo 944 coming in towards the end of this month!

Originally Posted by 944meister

brody, do you have a maf conversion for a 3.0L 944 s2? i would really like to upgrade to your maf rather than buying a new afm for my car!!!

Agian, yes! We just need to be patient and wait for a local participant to aid us by lending their car for the day. We have everything ready to go we just need the cars to confirm and tweak anything should we need to.

[Dougs951]

Wow, if this can give those kind of gains on a NA I can't wait to see the gains on a turbo car!

[AA_Ezra]

Hm, I wonder if the MPG would increase due to less of a flow restriction. More power and more mpg is always nice but i guess they don't go hand in hand to often

[James Chimney]

I think your post was spot on, you where pumped for this set up at that price, thanks for the report, and some people like to talk, let them as I took it for what it was meant a report on some thing that could benefit all 944 owners (weather they follow it or not is up to them) I too have posted like yours about stuff I was pumped about.
Now please do not flame me but what is a MAF, I have an 85.5 na and will be adding a PowerProm chip and Bursch header, cat elimination and full exhaust, my car already has the air box removed with a K&N type filter (will be piping it to the fender this spring) will this set up work for my car? and can my local Porsche shop "tune" this War Chip?
James