Porschetech3

I agree about the dividers. It would also be beneficial to have "air straighteners" in there before the MAF sensor also to keep turbulence from skewing the MAF reading.

I see fabspeed responding on the exhaust sound thread, and I'm sure they have lots of flow data (?) when designing the intake, but the guy responding on the threads may not be a designer with answers to our questions.

Mbren1979

I responded to them and asked them to join our conversation. will see what happens

Porschetech3

Since this thread is about "MAF value = Horsepower potential" and they have designed a MAF housing/intake system, if they will divulge flow data and method of calibrating/verifying the MAF housing to MAF sensor accuracy, then they are welcomed !!!

Using MAF value to evaluate IDP plenum, GT3 TB, camshaft design, or just air filter, or even exhaust systems, for flow gains or losses is very straightforward.

But using the fabspeed intake/MAF housing to evaluate "itself" is quite a conundrum, with the only supporting data is the physical measurements and fuel trims indicate that it is not "over-reporting" or "under-reporting" except by 3% according to their ID information of 3.6 x 3.1 oval shape housing.

808Bill

I'd sure like to see the inside that FS collector.

Mbren1979

Perhaps i will put my OE housing back in over the weekend to see what the difference will be. Truth be told i am lazy and don't want too. But if they don't join the discussion maybe that data can help something.

Porschetech3

I have visioned it in my head, and to be honest it causes me more questions than answers. But I am pulling for it to all be supported by the Math/Science and be more actual Mhpp. I want to find as much Mhpp and in as many places as possible ...

Porschetech3

I know the feeling, I was lazy today. I did my "spring cleaning" on my washable K&N dual cone air filter. The dishwasher does a great job, just make sure the wifey/GF is gone shopping for a few hours...

Yes, it would be important data !!

Mbren1979

best i could do

Mbren1979

The divider (or whatever we sre going to call it) is 5 inches away from the MAF

Porschetech3

Thanks !!! I'm loving the design !! Air, being a compressible fluid, has much the same flow dynamics as water ( a non-compressible fluid), if you envision water flowing through the intake, you can see how air will react through there..

808Bill

Excellent, thanks for taking the time Mbren1979. I look forward to seeing more testing!

bpoteat

2003 C4S 59k miles. Bone stock. I got a chance to do a pull yesterday and recorded a max of 232 g/s in 2nd.

I didn't think to get other variables at the time and wasn't in a position to go any faster or do more than that one, but it's a data point.

Porschetech3

232g/s / .75 = 309.33Mhpp ( uncorrected for altitude and weather)

Thanks for posting your data !!

Porschetech3

Did a pull today on my 99 3.4 using Durametric instead of Torque Pro.(was waiting on a new laptop battery, long story).

Logged 721 kg/hr at 6840rpm, 107F IAT, 79F ambient, 660 altitude

721 kg/hr = 200.27 g/s

200.27g/s / .75 = 267.02Mhpp

267.02Mhpp x 1.134 = 302.84Mhpp ( corrected for weather and alt.)

Mbren1979

68,400 rpms? I wonder how many ignition over revs thats going to be!