Mustang MAF and Throttle boddy on a 951???

[Vipergq]

Hi, I am contemplating on getting an upgraded Mass Air flow system for my 951 but I am really confused to what exactly it is. What makes 1 kit $1000 and another $2000. Is it just pure size of the inlet that is affecting the performance. How Big is the stock MAF and throttle body on these cars? I was thinking about using a Mustang Throttle boddy and MAF, But I am not sure how well it works w/ the 951 or even fits. The Mustang Throttle Bodies range from 65mm to 75mm and the MAF from 70mm to 80mm. Will these fit on my car and will it help performance? If it is just pure size that affects the performance, then these are much bigger than the stock porsches. Do I use a stock Sensor or Mustang's or other?

[Vipergq]

yes, I have been talking to Porscheboi but wanted to see waht everyone else has to say. As for the MAF, The Mustang MAFs say they are calibrated for like 24lb/gallon? That is for a V8 so would I double that for the 4 cylinder? Also, Porschboi has a 65mm, Would a 70mm be more flow or is there a limit? Still confused, thanks!

[porscheboi928s/c944t/n]

That is why we are taking it.. the mustang MAF to be calibrated .. it comes with a calibrator(knob)air/fuel... do not install a mustang MAF.it need to be calibrated first..mustang maf is a bosch too..my 0.02 cents

[White951]

I would love to hear about using a non Porsche MAF on a 951. I have the barn door stock unit and am not interested in getting up the $1k+ for an upgraded MAF. I hope you let us know how you are doing this.


John

[Kaos]

Has anyone ever flowed the stock Barn-door type unit on a flow bench? That is the information required to match up a different (ie. Mustang) MAF sensor.

What we need is the transfer function of the stock airmeter - a simple plot of airflow vs. output voltage. Once the stock transfer function is known, we need to do the same for the new MAF sensor.

Once the two transfer functions are known, then we need to add some resistors on the output of the new MAF sensor so that for a given measured flow the output of the two MAF sensors is the same. Depending on the difference between the two transfer functions, we may need to build a small powered circuit to modify the output of the new transfer function.

I will bet that using a flowbench at a local automotive machine shop or speed shop will be much less than $1000.

[951carter]

there is a whole lot more to it than just bolting a part on. even if it did work, which it wont, you still would not get any extra fuel. then throw in the cost of making the necessary plumbing. unless you can make them in bulk you are going to spend big $$. unless anuone has CNC and mandrel machines in their garage. we are almost done with a cold-air MAF kit that will be cheaper than whats out there.

[White951]

951Carter,

You say "we" are almost done with a cold air MAF. Who is we and what is your time frame? Are you from Powerflow?


John

[951carter]

we are Krynock porsche service. est. 1985 and member of better business bureau. I need to get my car back together so i can bolt everything up including the new plumbing, i am waiting on some valves and other parts. we are also working on updating the website. this is not really the main area of business but we wanted it for ours and customer cars and no one makes it.

[monteness]

I too would like to know your time frame. I know of another company working on a cheaper MAF and are behind schedule too. What price range are you looking to be in? I'm curious because I am/was going to buy an upgraded turbo to improve the hot side work but also to increase spool up time and sustain that. Probably a #8 hot side with a slightly machined interior of a #6 but with upgraded impellor. I would really like to do BOTH at the same time so price is important. My boost control(wife)has to stay in the dark most of the time about budget.

Are you testing this unit with stock chips or upgraded chips and by whom?

Thanks
Bret