$793 MAF programable conversion.
 

This is a reply I received as to Split Second's programmable MAF system to work with a 911 in place of the stock AFM. In belive it includes a wide band Air Fuel gage, MAF sensor, and programable signel conditioner. My thought is getting the data acquisition option that can monitor the stock AFM and wide band O2 voltage and set up the sensor in front of the the stock AFM to get the info needed to program it. If you look through there web site you can see they have done the 911 conversion thing before so they might have a base program??? ;)

Per split Second:

I would recommend the laptop programmable MAF Kit 3.5-P. That kit costs
$793. The cost is a little higher with the data acquisition option. With
that option you can monitor and record up to four 0-5 V analog signals.

We also offer the IAT1 intake air temperature sensor for $50 which will
provide the required air temp signal.

Mark Amarandos
Split Second
1949 E. Deere Ave.
Santa Ana, CA 92705
949-863-1359
www.splitsec.com

Interesting; does it do barometric pressure compensation real time?

I have this system in my '87 Carrera. I purchased the car in December. The PO put it in because "he took the car to the track 1 time and it was cutting out over 5000rpm" I'm not sure about his story but my Pcar mechanic has an '88 and thinks mine has more pep. He is suprised how well it works. I know I am not being very scientific here, it is all over my head, in fact I called over to Split Second a few weeks back and talked to Mark. He was a good guy and said if I want to stop by someone can explain the system better. I happen to work less than 5 miles from their shop but I haven't made it over there yet. Here are some pictures of the controls and the unit. Sorry about the poor photos.
http://www.pelicanparts.com/pmpre/im...1/S7300422.JPG
http://www.pelicanparts.com/pmpre/im...1/S7300425.JPG

Cooool...Tommy, Do you have an owner manual you can share with us...?

What a nice install that included the stock air box. Looks stock.

You have the model that has knobs on it and is easy to adjust. They have another that you adjust w a computer.

The can also add several channels to turn you PC into a data acquisition system. It would monitor a wide band O2, RPM, WOT switch and any other up to 5 v system I believe.

I belive there are install instructions on there web site. ;)
---

thanks for the comments. As I said this is new to me so I don't know exactly what I got. The PO says they dino'd it to dial in the settings 2 years ago. I'm thinking I should do it again. I'll know more after I go over to Split Second and talk to them. As for an owners manual, I only have what's on their website. I would like to tie it into my laptop if possible, just haven't had the time to learn about it. I'll check out their website again.

My first Pcar was a get in and drive - didn't work on it other than small maintainance. The '87 is a different story, I am soaking in as much info as possible to learn about this car. I'm the 3rd owner with 107XXX miles on it and it is a solid car.

If I learn more about this MAF, I'll post.

If I had your style of controller I would want the Air Fuel Ratio Meter to go with it. It is to easy for the knobs to be changed.

The kits for that price come with one.

Tommy,

I am interested on how they contacted you sensor to the air box. Do you have any more pictures that show that better?

Did they just cut a hole in the side or did they fab up some type of tube between the sensor and the box?

Thx.

I strongly agree. Hopefully you have the settings written down in the car somewhere, or marked on the controller itself. I'd be afraid of "what does this do..." or bumping it while reaching for something. Plus there would be more ability to fine tune your AFR's.

I wonder if the company supplies a map that will at least let the car run when going for the laptop adjustment route.

Neat kit and the price is right, but reading the website there doesn't seem to be much support. Might not be true, but I got that impression.

With the one example on the site, I wonder if they went straight from the stock chip to the MAF kit and custom tune. If so, the results aren't that impressive, and not any better than the improvement you'd get through the mail from SW. I hope not, since it was a "race car."

http://www.splitsec.com/spike/porsche/spike911.htm

The website could use some beefing up, that's for sure.

It is bolted on with 4 bolts and some sealer. Here is an outside shot and an inside shot after taking out the air cleaner.
http://lh4.ggpht.com/_0zSnrU-Q9Bc/SY...0/S7300426.JPG
http://lh4.ggpht.com/_0zSnrU-Q9Bc/SY...0/S7300428.JPG

Split Second
 

Having done a couple of the Split Second MAF systems on a 3.6 with camshaft and exhaust upgrade, the dyno results speak for themselves. See attached dyno sheet for OEM AFM setup compared to the same engine with Split Second. Mark @ Split Second was great help over the phone with a few questions on the first install.
I used the PC based version of the Split Second for programming. A 90degree aluminum elbow going to a K&N filter was used in place of the factory air box filter. Throttle response was very much improved over the OEM AFM. This ECU had a Steve Wong chip requested for the MAF system. Steve is also great to work with and responds with quick turn around on custom applications.


http://forums.pelicanparts.com/uploa...1234047433.jpg

rsScotty,

Great info!

I have a SW chip dialed in for my AFM. Are you saying Steve did a "MAF chip" to work with attributes particular to a MAF or do you think it was more to compensate for the increased air flow it allowed?

Where the air fuel ratios are about the same the HP difference looks significant. Looks like 5 to 8% more HP.

Was there any changes made to the ignition side between the two runs?

As far as the differences between the Steve Wong AFM chip and the one he does for the MAF system, you would have to ask him. Ignition timing was the same between the two runs on the graph, verified with timing light at full throttle during dyno pull.

So it is a MAF specific chip it sounds like.

Again, great info.

I do have the settings written down in the car. I thought the same thing "what do these knobs do?" espescially if a kid gets in the car.

hope I helped with your thought process.

Yes! Very helpful.

I am thinking that for any MAF conversion to reach its potential it needs a chip dialed in to match fuel to the increased of around 10-15hp in increased air flow potential.

It might be possible to get more fuel out of a stock or SW chip by playing with the output voltages up top or by playing off the fuel quality switch against the output voltages.

It may be that just replacing the AFM w a MAF system without addressing the increased air flows, we might go lean up top.

That is if we are can not get more fuel up top with higher output voltages, we can turn up the fuel quality switch then lower the output voltages at lower rpms to dial in the A/F's through out the rpm range.

I suspect if we just get the A/F's right through out the WOT range, there would just be a little adjustment to so off idle.

Boy, we are lucky to have Steve at 911chips.com to get more out of our Motronics's systems.