Mass Flow Sensor

[porscheboi928s/c944t/n]

To whoever is in doubt on what the hell MAF i am talking about.www.pro-flow.com

click on the authorized dealer and look under VIRGINIA..... tell me if i am full of S#@T...

hope this answers ur doubts...

[drew1]

I think that it might be possible on a 951, but a pain to do. The flap sensor has a air temp sensor in it so you will have to put another in the system. You will have determine the voltages from your flap sensor and mimic them with the MAF unit. From glancing through the web site, it looks like their calibrator changes fuel pressure instesd of injector pulse width. A 944 turbo expert could advise you if it can be made to work.

I would consider the expense & reliability of this Ford setup to MAF coversions made specially for a 951 and compare it to another ECU made for MAP sensor.

drew1

[Vipergq]

Hey Porscheboi, Nobody has really answered me on what makes an MAF better than another? Is it pure size or are there other factors? Because the Huntley and Autothority MAFs claim to add anywhere from 50-100HP, while on the Pro-M page they only claim 12-25. What is the difference and why is it so major? By the way, what is the limiting factor on The Throttle body? What Size is considered too big? You have a 65mm, would a 75mm for example be too big? Still very confused about MAF systems!

[Vipergq]

also, What is the Stock 951 Throttle body size?

[monteness]

I think the limiting factors on what makes one MAF kit better than the other is what do you want to do with the car.

Autothority - some of the best engine management software to date, you buy their reputation. If you get stage II chips alone, they are designed to work with you stock air box, fuel pressure, etc. If you choose the MAF kit, it is designed with the increased air flow and you are advised to get an adjustable fuel regulator to tune the system.

Huntley - pretty much the same, different stages of MAF, but read the print carefully. Some of their kits are designed to work with bigger turbos(inlet sizes) and although not listed, they do have their own chips.

After doing a whole lot of research(because my boost control is my spouse/budget- HA! ), my next mod will be the Huntley Cheater II turbo. This gets the hot side working better, much better air flow on the cool side, and all of this reduces the back pressure and lets everything move correctly.

The throttle body on the 944s(all)are good, as is the intake and the heads. Yes you can get extrude honed, ported and polished and you will have smoother air movement but,,,,after a whole lot of discussion between Powerhaus, Huntley, Lindsey, that should be a last mod, if you will, because they(head/intake/TB) will accept all the MAF kits and turbo upgrades to a point and work great. You may want to consider a new throttle body if you upgraded your intercooler.

Whatever you choose, you will need to fine tune the system; mixture, idle control, check CO, fuel pressure, etc to get the best results,,,,,good luck.

Bret

[porscheboi928s/c944t/n]

reason why they claim only 25 hp...co'z others includes the chip with it why it is upto 50 or a 100(claim)with that alone and no chip or extra boost i burn my car if they reach 100hp..also the maf i am talking about will have a tiny knob in it for air/fuel for thinkering(calibrator)...im not sure of the size of the existing airflow meter my guess is like between 55 to 65mm.....who do u think makes the autothority maf??oh well..guess i am the sacrificial lamb....IMO,,,my 0.02 cents

[PrerYDoG]

I believe what they are talking about on their performance gains relates to a gain over other Mass Air Flows. As I understand it, Porsche did not move to Mass Air Flow kit style until the 968 came out, that is why 944's can gain more performance by going to a MAF kit, because the current flapper style Throttle Body is so restrictive

[Vipergq]

Thanks Montness for writing. I am Planning to Build an all out 400 HP to the ground monster and have been doing Quite a bit of research. As for the what I am going to do with the car... I currently Have APE stage 2 Chips, Wide firing headgasket, Aluminum Flywheel and centerforce clutch, I plan on Getting a Huntley Stage 3.5 Ball bearing turbo but am a little hesitant on the price. Big Trottlebody, Adjustable FPRs, Full 3" exhaust, Apex-I Avc-r Boost controller and AFC Fuel Controller. Also Trying to Get a Mustang MAF Calibrated?

Anyways, with all of these modifications, What is the difference between the MAFs? Again, Is it purely size? To put it straight, will a Bigger MAF inlet give me more flow? What are other factors to what makes HP (concerning MAFs)?

I am also considering a Nitrous Kit so that I can Have temporary speed while I save up to buy the turbo. That is what I am aiming at. Will all of ther components listed above work well with nitrous until I can get the turbo, That is what I am mostly interested in. I know that with the turbo I will be aroud 400 HP to the ground at 20 PSI. and without it I should be somewhere at the same level w a 75 shot of nitrous. I rather have the turbo so I just need to know if the Nitrous will work well with the rest of the setup? If not, I am open to suggestions.

I figured with a 3" straight exhaust, Big bore throttle body, and 75mm MAF I should be flowing more air than I need. and the Adjustable FPR will hold it fine until I get the turbo which I will probably be needing bigger injectors.