High quality 100mm MAF with new Hitachi sensor

[Bruce Melton]

We made up a bunch of these to sell to "friends"

Details here (http://www.powrmax.com)

http://home.new.rr.com/meltn/PowrMax%20100%20MAF.JPG

[98 tigershark]

Hi again bruce,
Thats a clean looking maf. How much?
Thanx 98 tigershark
Thor, [email protected]

[ChipsByAl]

From his website

Al

Continental US freight> $8
$189 direct price

[redhardsupra]

and how does this fix anything?

[Bruce Melton]

PM 100 vs 2001-2005 >>> 99-2000 was smaller yet

http://home.new.rr.com/meltn/85-103mm%20%281%29.JPG

[redhardsupra]

maf vs straight pipe was proven to make no gains, and with the limits of both range and resolution being in the ECU, bigger MAF makes no difference.
my question remains: so what does it it fix?

[Redline Motorsports]

maf vs straight pipe was proven to make no gains, and with the limits of both range and resolution being in the ECU, bigger MAF makes no difference.
my question remains: so what does it it fix?

I think Chad can comment further on this!

[duramaximizer]

We are maxed out of the stock MAF sensor on our duramax.... how do you go about calibrating the ECM or tuning off of it.

[jfpilla]

maf vs straight pipe was proven to make no gains, and with the limits of both range and resolution being in the ECU, bigger MAF makes no difference.
my question remains: so what does it it fix?
After my LS7 install I was running the stock MAF, so I'll be able to determine if there are any gains for my setup, from stock MAF to Ling. 100mm.
I did not intend to go to the 100mm because it seems the consensus is there is nothing to be gained but the price on a used one was so good I went for it and am very pleased I did.
At WOT the MAF graph is smooth versus choppy with the stocker. It was easier to tune with a smoother MAF calibration line. Ltrims don't vary as much from hot days to cold days and we've had a lot of that in NC.
How much of the improvements are due to the 100 being close to the TB? Probably some, but the new style sensor should be superior to the wire sensor.

[Bruce Melton]

maf vs straight pipe was proven to make no gains, and with the limits of both range and resolution being in the ECU, bigger MAF makes no difference.
my question remains: so what does it it fix?

The short answer is: a broken MAF

What is a broken MAF?

* one that is damaged
* one that become the most restrictive element in the intake one where FI is contemplated

* One where the flow exceeds 511 as dictated by the OS? We know the OS dictates the range in G/s and Hz normally 1500>12,000Hz and ~0>511 G/S but is that because the hardware was maxed out or the GM anticipated flow was in range? The new Hitachi sensors seem to be much more robust, less sensitive to placement and less restrictive.

* The new 08 LS3 E-38 goes from ~0>15,000 Hz and 0>1878. G/s to accommodate the LS9. The GM 08 Hitachi sensor is also interchangeable in the housing (I can supply either) for those who suspect it is a widerband sensor and want to try scaling earlier tables to predict flow. (I am fooling with this on the dyno now)

A broken MAF is not owned by someone who feels better off without a MAF or is confident none of the above apply.

Certainly not trying to oversell, this is not for everybody.

Some of us depend on a MAF to to accommodate the vast changes in atmosphere-- some don't.

[redhardsupra]

ah interesting...how juch for the sensor alone? i'm doing an experiment, i could use 2 of them.

[jfpilla]

http://forums.corvetteforum.com/showthread.php?t=1924208

Bruce,
You're getting some press.
joe

[Bruce Melton]

There is no way to say this credibly, but it seems the results are better than anticipated.

[jfpilla]

There is no way to say this credibly, but it seems the results are better than anticipated.

Maybe my results are real. The car sure feels like it.

[jfpilla]

There is no way to say this credibly, but it seems the results are better than anticipated.
Bruce,
I replaced my WB 02 sensor and wanted to try it out. WOT from 60mph almost instantly went to 100kpa. The Vararam picked up 2kpa from the dyno and I've never had more than 97kpa with any of my engines under any conditions with the stock MAF. More proof the 100mm makes a difference?
Joe

[Bruce Melton]

I have two of our PowrMax 427s to dyno, plus my own again. Nobody up here wants to venture out into the WI frozen tundra (me included). I am dying from data starvation.
I cetainly like yours though...
Thanks joe.

[joecar]

It does seem to me that the bigger MAF is less of a restriction... MAP jumping up to BARO (or very close) is proof enough for me, let the nay-sayers wag their tongue in vain.

:cheers:

[redhardsupra]

easy enough to test, put a differencial manometer before and after a regular MAF and measure the drop. then rinse and repeat for the big one. if they're really preventing 2-3kpa MAP drop, it will easily show.

[Bruce Melton]

Let me see if I can find my old differencial manometer out in the garage?
I think it is in the box with my Craftsman Pro Series timing light and dwell meter. ;)

[jfpilla]

Let me see if I can find my old differencial manometer out in the garage?
I think it is in the box with my Craftsman Pro Series timing light and dwell meter. ;)

Why didn't I think of that?:nixweiss:

[joecar]

If you can't find your manometer, you can make one with some clear plastic tubing...
even if it's crude it should still work since it measures pressure difference.

Timing light and dwell meter, yes those were fun, I still have those. :cheers:

[redhardsupra]

i got a cool digital differencial manometer with 0.1kpa precision if anyone wants to borrow it for some tests, it'd be nice to see the differences in pressure dropages among different MAFs

[Bruce Melton]

RHS,
How bout I send you a free demo loaner PowrMAF? I think that might be easier (for both of us) than splain'n the ins and outs of DDM technolgy, and I would like to know what you find.
Bruce

"But wait-- there's more!!!!!!!!"

[Z06PSI]

I have one of Bruce's for sale. We chose to go to SD 2bar tune so this un-used and I mean un-sed 100mm MAF is for sale. Looks like a great piece and hell I want to use it but the tuner does not as he likes the SD tune. Anybody want it just PM me.