Anyone take measurements of their CAI mods?

[hayaku]

Just for giggles, i hooked up my autoenginuity obd2 gear to the x5 and drove it from work to home last night... i set the monitors to look at intake temp and maf flow rates and outside temp.

BTW, my car is 100% stock with 48K miles.

On average:
Outside temperature was 71 F
MAF flow rate at idle was .75 lbs/min
MAF flow rate at 70mph was 4-6 lbs/min
Intake temp at idle was 80 F
Intake temp at 70mph was 77 F

As you can see, its only 6 degrees difference... wonder how much the AFE/DINAN/etc CAI kits really do... I'm almost certain the only gains is from the different filters that allow more air flow...

[Kewl X5]

Yes, that is probably the best thing that the AFE filter. You know for kicks, we can do measurements on my car with the stock air intake vs. the AFE. Of course, that is when you have time!

We should do this and of course we can use your special test course!

Originally Posted by hayaku

Just for giggles, i hooked up my autoenginuity obd2 gear to the x5 and drove it from work to home last night... i set the monitors to look at intake temp and maf flow rates and outside temp.

BTW, my car is 100% stock with 48K miles.

On average:
Outside temperature was 71 F
MAF flow rate at idle was .75 lbs/min
MAF flow rate at 70mph was 4-6 lbs/min
Intake temp at idle was 80 F
Intake temp at 70mph was 77 F

As you can see, its only 6 degrees difference... wonder how much the AFE/DINAN/etc CAI kits really do... I'm almost certain the only gains is from the different filters that allow more air flow...

[gregwx5]

U know i was wondering the same thing. I ordered the AFE for my 3.0 and wonder if that and my Supersprint exhaust do nething noticeable or claimable in terms of performance gains.

[Intel55]

Interesting. What are the capabilities of your autoenginuity obd2 tool? I looked on their website, but did not see anything for BMW. I primarily want to see the timing, knock, knock retard and fuel trims. Some of those parameters might be avaiable in the generic odb2 data, but I would like to find the software for the "enhanced" data.. I am used to AutoTap and would like to use an odb 2 scanner on my X5 after I get some pcm modifications (from knellers or powerchip).

[rayxi]

I'm not surprised. The stock airbox may be restrictive relative to a CAI but it certainly does a good job of keeping out engine bay air. A good CAI will achieve the same intake temp as the stock airbox but I doubt that it could do much better.

Was your idle temp at the beginning or end of the trip or an average? Where is the intake temp sensor on the X5, is it integrated into the MAF sensor?

[hayaku]

Originally Posted by Intel55

Interesting. What are the capabilities of your autoenginuity obd2 tool? I looked on their website, but did not see anything for BMW. I primarily want to see the timing, knock, knock retard and fuel trims. Some of those parameters might be avaiable in the generic odb2 data, but I would like to find the software for the "enhanced" data.. I am used to AutoTap and would like to use an odb 2 scanner on my X5 after I get some pcm modifications (from knellers or powerchip).

autoenginuity only uses the generic odb2 stuff on the bmw right now. i spoke with jay, the owner/principal engineer behind the software and he is actively working on the enhanced bmw specific module. if the bmw module is going to be anything like their ford and gm modules, its going to be rather spectacular i think...

the defacto non-bmw scantool i know of today is carsoft international but i wanted to be able to use this on my other cars as well... this was the best solution i can find that allowed for a PC and Palm device and has extensive logging abilities. Their DTC library is very complete as well... great value for the price imo...

[hayaku]

Originally Posted by rayxi

I'm not surprised. The stock airbox may be restrictive relative to a CAI but it certainly does a good job of keeping out engine bay air. A good CAI will achieve the same intake temp as the stock airbox but I doubt that it could do much better.

Was your idle temp at the beginning or end of the trip or an average? Where is the intake temp sensor on the X5, is it integrated into the MAF sensor?

idle temp was before and after the drive home... i had to drive about 1 mile to pick up my daughter so the car was warmed up. after i picked her up, then i started the scantool monitoring...

i'm not exactly sure if the intake temp sensor is in the maf or not... haven't really looked...

[vinuneuro]

Does the AFE intake really qualify as a CAI? Usually CAI extends to behind the bumper area farther down. This is really a short ram intake. I would think that this intake would draw in warmer air than the stock system just because the filter is completely in the engine bay, whereas with the stock set-up air is drawn in from the kidney grille area. Any thoughts on this?

[Kewl X5]

In the 3.0i, the air is still coming from the stock intake, but the intake filter and box is much larger. So you are right, actually the stock intake is already a "cold air intake".....The AFE just allows more air in.....BTW, if you see in the articles of my AFE Intake installation for the 3.0i, you see, that it is enclosed and still uses the stock intake tubing which gets air from the kidney grill. The top of the box is the hood. So the AFE intake box is isolated from the engine bay.
http://www.xoutpost.com/engine-transm...fe+intake+3.0i

Originally Posted by vinuneuro

Does the AFE intake really qualify as a CAI? Usually CAI extends to behind the bumper area farther down. This is really a short ram intake. I would think that this intake would draw in warmer air than the stock system just because the filter is completely in the engine bay, whereas with the stock set-up air is drawn in from the kidney grille area. Any thoughts on this?

[hayaku]

but this begs the question of: "won't a better filter with the stock airbox produce the same as a whole aftermarket intake kit?".... since all you are really doing is changing the filter to allow freer flow of air?

air temp may or may not be different from the stock box... i'm betting its actually warmer then the stock box but we'll see with more data....