CAI indepth.....

[hampsterzone]

Excellently put! I appreciate your response. Any thoughts on exhaust causing the O2 sensors to relay lean conditions?

[ticopowell]

My question about the CAI's and the MAF is that on the 2 K&N CAI's that I have installed, the MAF sticks around, and so did the pipe surrounding it. here is a picture here is another
the pics are for different sensors which may or may not be different than what we have, but my point is the same. That specific diameter where the MAF is located stayed the same in my trucks where I put in a CAI versus stock because that piece, even though it moved up or down the intake track, was exactly the same diameter.
The only thoughts that I have that would make it different is that if the pipe or filter right in front of the MAF made air flow faster through the pipe where the sensor cant read, such as the other side of the tube, then there would be a lean condition.
any thoughts?

[hampsterzone]

I have to say I believe it is the amount of air going past that causes the lean condition. Makes sense because a lean condition is caused by too much air to fuel ratio. Just like exhausts being opened up and less restrictive causes lean conditions. I can't seem to agree anything other than the more air means leaner conditions regardless of MAF location. Simply put, more in & more out means the computer has to account for than it is initially set up for. Fuel seems to be the missing ingredient. Or Bill for that matter. LOL I seriously can't wait to install my gryphon and see the difference. Hope my thoughts help.

[Longshot270]

Originally Posted by ticopowell

My question about the CAI's and the MAF is that on the 2 K&N CAI's that I have installed, the MAF sticks around, and so did the pipe surrounding it. here is a picture here is another
the pics are for different sensors which may or may not be different than what we have, but my point is the same. That specific diameter where the MAF is located stayed the same in my trucks where I put in a CAI versus stock because that piece, even though it moved up or down the intake track, was exactly the same diameter.
The only thoughts that I have that would make it different is that if the pipe or filter right in front of the MAF made air flow faster through the pipe where the sensor cant read, such as the other side of the tube, then there would be a lean condition.
any thoughts?

Tico, I'm not sure what to say with the After Market MAF sensors. That would be a question for Bill.

I can say that having the higher flow gotts mod and AM filters that the stock MAF can easily account for it. The stock sensor can handle over 200 grams/sec of air...or the amount of air my truck consumes at WOT around 5400 rpm. No basic intake mod can overwhelm the stock sensor. On my truck I got gains of about 10 grams/sec. Things might be a bit different for turbo/supercharge kits but for a basic stuff you're good on that sensor.
Here is a chart I made a while back comparing the gotts mod to the stock intake set up. http://forum.gopowerhungry.com/membe...maf-vs-rpm.jpg

That also brings up another factor for a lean condition because over oiling can cause it to acumulate on the sensor. This would help insulate the wire. Just one of the many reasons you should properly oil AM filters if you dont still use the traditional paper ones.




Hey...that looks like 2k posts, thanks for reminding me Ticopowell

[hampsterzone]

Any thoughts regarding exhaust causing leaner conditions? I would love to hear your opinion. (anyone's for that matter).

[Longshot270]

I dont really have an opinion on exhaust because I've never really messed with it besides dropping empty cans into a friend of mine's diesel stacks.

I did find that a flowmaster 40 would only add .1-.07 seconds to my 1/4 mile time (even that is questionable when I compared the 60' and 1/8 mile times). So all those heated arguments over theories and physics and them being restrictive are pretty much a load of bull IMO.

Bill does advise custom tunes for certain headers, high flow cats and other mods.

In regards to a lean condition, if it is done right you shouldn't have any trouble...that is my opinion, so me and your mechanic agree on that part.

[hampsterzone]

Opinion considered! Forced air induction is too risky and potentially harmful to engines. With all that being said, what do you think of my mods? Have you done the same? I don't like under drive pully's because of the alternate problems and higher idle rpms needed. I don't think I have anything else to do performance wise. All I want now is an 8" lift. LOL

[88Racing]

Originally Posted by hampsterzone

Excellently put! I appreciate your response. Any thoughts on exhaust causing the O2 sensors to relay lean conditions?

The lean codes from the o2 sensers can be atributed to a vacuum leak occuring after the maf up to the point of combustion......after combustion the exhaust may cause these but before the o2 senser if there are......broken welds, broken header studs, cracked manifolds, bad gaskets.......