knucklesplitter |
2009-05-13 05:29 PM |
I did not mean to imply that it is a Magical Intake From Candy Mountain [tm] :P;) that will not require tuning no matter what other mods it is used with. I meant that if you put it on a stock car or even a good off-the-shelf stage 2 car it will be okay - not optimal but okay. It will certainly be driveable. I wouldn't put any intake, or IC, or exhaust on a car and go full bore full boost until I logged it to check at least for knock.
Quote:
Originally Posted by cody
(Post 134131)
I've been told by a respected tuner that a different filter media can skew MAF readings, "much less" a different housing all together. Apparently anything that alters the turbulence profile of the incoming air can skew the MAF readings.
However, I know Matt tunes, himself, and I have a lot of respect for him and his business so I'm just wondering if, in his opinion, I'm misinformed.
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I suppose a different filter media can change things, but only if it is close to the MAF and only by a percent or two (guessing). I have not tested this.
You have to remember that the ECU has algorithms that compensate for small changes (filter, dirty filter, dirty MAF, sensor calibration drift, etc.) This shows up in the long-term fuel trims. And the ECU can also pull timing if it gets too lean and knocks a little (but this is not desirable).
If you have a hi-strung tune right on the ragged edge of safety then it could be a problem at high boost. Once you get a really hi-boost, relatively-lean tune with lots of timing then you better not change anything without getting it rechecked and prolly retuned.
The main thing that messes with the MAF is elbows before the MAF. and the orientation of the MAF relative to the elbow(s). That is why some CAI's are a problem. The stock airbox is basically a filterless short ram with its snout stuck in a box, and then one side of the box is a filter. Kind of... anyway...
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