Ebay CAI
10-08-2007, 02:02 PM
#28
he most likely buys them, but that pick of it is all wrong, look at it, theMAF sensor is by the filter, and the line that goes into the valve cover is in the right place, so they f'd up...i saw someone bought it, cuz its not for sale anymore, i was gunna get it(to use the bottom 1/2 for my gmpp) but someone got, anybody from here?
10-08-2007, 10:32 PM
#31
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I was trying to locate the disc I had with data logging info, couldn't find it, so I'll summarize another tidbit of info.
Most all made CAI systems have one common trait that makes certain events, gains happen.
They have elbows just before the MAF's.
The smaller arc is ALWAYS on the opposite side of the MAF reading unit.
Because of distance alone, even though path of least resistance applies also, more air volume passes on the inside turn than the outside one. Its not just a little more, its dam near 50% more.
Since more air is entering on the inside turn and the MAF reading unit is placed middle to upper side of the turn, alot of air the intake without the MAF seeing it.
Factory systems always use a box top of sorts that is much larger than the exit tube. This creates a even air flow entering the tube and going through the tube, so is more accurately attuned with MAF readings.
CAI systems from the get go make the motor run leaner. It takes up and over 1000 miles for some ECM's to learn via the 02's and adjust for this. Leaner is meaner !!!!!!!! That another reason for seat of the pants dyno's correlated with vacuum noise brains that sells these things and make believers out of most.
ECM systems for the most part are read and react systems. Meaning a event happens first, then adjustments are made. Hence the learned event.
I had 3 vehicles data logged to prove this happens and the one that scared us was the supercharged one.
Once the ECM had learned the CAI was on there, leaning is still a concern specially with forced inducted applications. As more volume of air enters, air entering speeds increase the percentage of imbalance the MAF doesn't know is happening increases. Once PE is reached the 02's are dropped in useage and the MAF pretty much takes over. With nothing to ever correct the fuel balance at PE stages (O2 useage) and with more percentage not being seen by the MAF, it gets even leaner. I saw all most one point leaner, a vehicle that was tuned previously to the MAF that was 12.2:1 went into the high 13's at first and settled around 13.1:1 after mileage and learning.We had to correct by re-tuning this car so it would see the 12.2:1 which was dyno tuned after the SC was installed for its best balance of power to fuel.
Something to keep in mind for SC adders!!!! Actually everyone since it still happens to some degree. Those whom tune with forced induction using wide bands and CAI's from the get go never see this!!
Most all made CAI systems have one common trait that makes certain events, gains happen.
They have elbows just before the MAF's.
The smaller arc is ALWAYS on the opposite side of the MAF reading unit.
Because of distance alone, even though path of least resistance applies also, more air volume passes on the inside turn than the outside one. Its not just a little more, its dam near 50% more.
Since more air is entering on the inside turn and the MAF reading unit is placed middle to upper side of the turn, alot of air the intake without the MAF seeing it.
Factory systems always use a box top of sorts that is much larger than the exit tube. This creates a even air flow entering the tube and going through the tube, so is more accurately attuned with MAF readings.
CAI systems from the get go make the motor run leaner. It takes up and over 1000 miles for some ECM's to learn via the 02's and adjust for this. Leaner is meaner !!!!!!!! That another reason for seat of the pants dyno's correlated with vacuum noise brains that sells these things and make believers out of most.
ECM systems for the most part are read and react systems. Meaning a event happens first, then adjustments are made. Hence the learned event.
I had 3 vehicles data logged to prove this happens and the one that scared us was the supercharged one.
Once the ECM had learned the CAI was on there, leaning is still a concern specially with forced inducted applications. As more volume of air enters, air entering speeds increase the percentage of imbalance the MAF doesn't know is happening increases. Once PE is reached the 02's are dropped in useage and the MAF pretty much takes over. With nothing to ever correct the fuel balance at PE stages (O2 useage) and with more percentage not being seen by the MAF, it gets even leaner. I saw all most one point leaner, a vehicle that was tuned previously to the MAF that was 12.2:1 went into the high 13's at first and settled around 13.1:1 after mileage and learning.We had to correct by re-tuning this car so it would see the 12.2:1 which was dyno tuned after the SC was installed for its best balance of power to fuel.
Something to keep in mind for SC adders!!!! Actually everyone since it still happens to some degree. Those whom tune with forced induction using wide bands and CAI's from the get go never see this!!
+rep
10-08-2007, 10:36 PM
#32
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10-09-2007, 04:05 PM
#33
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I really didnt expect much more, really didnt.
People just dont understand a common sense approach.
Its there, its very clear.
All the after market is after is MONEY, plain and simple.
No one wants to hear about how they wasted their monies, specially when its suppose to be a horse power adder.
Reality, truth says its costs about $100 to gain one horsepower on average without mark up.
I'm 47 and have played with vehicles, highly modified ones for 30+ years. I was young, dumb and full of *** myself at one time and believed that **** also. But who wants to listen to someold man that really might know his **** when he goes against what he wasted his money on at one point and has learned the true meaning of after market!!!
11-02-2007, 06:10 PM
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https://www.cobaltss.net/forums/show...t=82978&page=2
heres the link to the pics I put up of hte ebay CAI - btw the pipe in the pic is backwards, so the MAF lines up just fine, I wrote a small review above the pics......
heres the link to the pics I put up of hte ebay CAI - btw the pipe in the pic is backwards, so the MAF lines up just fine, I wrote a small review above the pics......
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