Working with PRO-M for maf + intake

[cavingman]

I met up with some guys from PRO-M today, the people that make alot of aftermarket maf sensors. They flow-tested my stock intake and took readings from the maf. after some discussion they got to talking about how easy it would be to make us an intake WITH an aftermarket maf sensor.

He said they are going to start engineering the new intake + maf now and would give me a call when they are done. From what I gathered it would replace the 90 degree bend from the TB to the airlid, the airlid itself, and maf sensor. not sure what else. keep in mind this would greatly increase the gains from an intake and future mods due to being able to read more airflow, due to the maf being changed. i'll be sure and update this thread as soon as i get more info.

[Sp00ner]

What did they say about the flow of the stock intake? Any numbers?

Also, perhaps a MAF that would be better suited to the K&N intake? Not gonna do much good in terms of making an aftermarket intake work better, if it replaces the stock intake.

What type of MAF will the be making? There are a few different kinds, each with postives and negatives associated. Also, what about the other integrated sensor(s) in the module? The IAT sensor for instance, not sure if there are any others. Wop?

[pclear9061]

how are you going to elminate the 90 Degress???

[cavingman]

Originally Posted by pclear9061

how are you going to elminate the 90 Degress???

read: replace, not eliminate. like the aem intake.

Originally Posted by Sp00ner

What did they say about the flow of the stock intake? Any numbers?

Also, perhaps a MAF that would be better suited to the K&N intake? Not gonna do much good in terms of making an aftermarket intake work better, if it replaces the stock intake.

What type of MAF will the be making? There are a few different kinds, each with postives and negatives associated. Also, what about the other integrated sensor(s) in the module? The IAT sensor for instance, not sure if there are any others. Wop?

I watched like 100 numbers flash by, and most were volatge readings. hard to understand to the untrained eye lol

not sure on what type of maf. I'm assuming it will be a largely different design than our stock maf sensors. I highly doubt it will fit the stock mounting, therefor eliminating possibilities of fitting aftermarket intakes. unless it's a common design that you can just put inline wherever you'd like. than you would only have to plug up the stock hole.

the only sensors associated with the maf is the IAT. from what i understand it will be left unchanged. If any tuning possibilities ever come out, things like IAT could be changed easily, whereas a maf sensor maxes out at some point i believe.

[WopOnTour]

Explain to me the incentive for changing the MAF? I mean I understand wanting to improve the inlet airflow, but the factory MAF is a "probe" style and therefore quite unrestrictive. Most of the aftermarket MAFs are to replace an "inline" type that's part of the inlet duct work itself (like a great many other GMs but not the LSJ)
WopOnTour

[zfactor]

maybe so the sensor if designed around the intake no more cel lights???

[Sp00ner]

Originally Posted by zfactor

maybe so the sensor if designed around the intake no more cel lights???

I'm pretty convinced tht the CELs are from either oil on the MAF, or from the intake heating both the MAF & IAT sensors above the actual air temps. At a stand still, the temp of the intake air will climb quite rapidly. Rev it once, and the temp will drop 3-5 degrees, and go up almost instantly again. I really feel that SOME of the issues are from the car thinking the air is much less dense than it is, it leans out the mixture to compensate, and then picks up the anomoly down the line. I've been thinking this for a while now, but it's hard to figure it without another Redline with a stock intake in the area. My CEL has been off for a few months now, so I could be wrong... dunno..

[cavingman]

yea, my major hope is to eliminate the random CEL's we have been having problems with. inlet flow is not a major issue, although i believe it may increase.
wop do you happen to know what the max amount of inlet air our mafs can read is? do they even work that way? I know nothing of the inlet sensor system on this car really. pro-m said they could help us, so who am i to stop them?

[WopOnTour]

Originally Posted by cavingman

yea, my major hope is to eliminate the random CEL's we have been having problems with. inlet flow is not a major issue, although i believe it may increase.
wop do you happen to know what the max amount of inlet air our mafs can read is? do they even work that way? I know nothing of the inlet sensor system on this car really. pro-m said they could help us, so who am i to stop them?

The frequency varies within a range of near 2,000 Hertz at idle to near 10,000 Hertz at maximum engine load. P0103 will set if the MAF is reading about 11,000 Hz. But this isnt the DTC that has been setting with the CAIs it's been the P0068 and P0101 which are "rationality" DTCs with complex modelling of the failure modes. It's just not as simple as changing the MAF frequency as these types of rationality checks look at the correlation between numerous inputs such as RPM, TP, TMAP,SCIP, as well as MAF to establish that something just doesnt correlate between them.
Not trying to deter your efforts though, I just can't figure out how changing the MAF itself is going to have any positive effect, without being able to alter the PCM software itself. (STILL he biggest issue in moving forward with the LSJ IMO)
WopOnTour

[pclear9061]

what about the p0171 code?