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Custom CAI--- No CELS!!!!

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Old Oct 4, 2008 | 11:24 AM
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I'm def gonna go after I get a tune... i dont think my car is ready for track abuse yet. Thanks for the info!
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Old Oct 10, 2008 | 09:46 PM
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Ok i thought i would update this--- i got the wideband uego and the walbro 255 installed today---

at first i was shitting bricks because at idle the wideband goes to null--- i thought it was so extremely lean it wouldn't register LOL-- not the case. I guess they're known to go null at idle--makes sense

anyways, here are the results

at 1.1bar WOT i'm running 11.0 up to 12.4 from start to finish (typo)

At cruise speeds it ranges 14.7 up to 15.4


No cel's because I'm only 2% lean at WOT and like 8% lean off at cruise compared to OEM

tastey apples--- tastiest are the ones you work hard for. I have spent rediculous amount of time building this intake--- and it's still not perfect. I'm going to do some rotating and such and see if I can't get it puuurrrrrfect... it does move air and sounds greaaat. I'll post a video soon.

it's shaped like an s and the bottom of a cyclone-tornado--- hurricaines seem to do good with air, so why not model it after that this is why it is different than those non working fuel saver tornado things. One, no metal crap will get sucked into your intake-- this intake takes advantage of the g-forces that found in cyclones as opposed to the tornado fuel saver which spins the air inside of the tube. With a turbo application, it's my opinion you can amplify that to the size of the entire intake system. So if you model the entire intake system after one "spin" of the cyclonic model you can successfully use g-forces to condense the molecules and start the spinning action of the air to reduce the drag on the turbo blades allowing for faster spool with cooler more dense air due to less friction. This would be acknowledged by the infamous howling sound of vortexing air. This is all theory of course because I don't have a wind tunnel to test only software and what i can research on the internet.


diagram of the logic



anyways, here's a pic of it, which does not do justice.




Here's a video of my boost gauge--- notice how quickly it "boosts" to desired PSI
http://www.youtube.com/watch?v=_ivaUQOvycI

Last edited by skoloseven; Oct 11, 2008 at 10:42 AM.
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Old Oct 11, 2008 | 01:05 PM
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just to let you know that 12.4 is too lean to be running unless that is in the spool range. it should be in the 11s in the upper rpms
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Old Oct 11, 2008 | 02:48 PM
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Originally Posted by 3gsucks
just to let you know that 12.4 is too lean to be running unless that is in the spool range. it should be in the 11s in the upper rpms

thank you for your input.. I've been wanting to get some data just like that--- you're right it does run slightly lean until you get into boost. That 12.4 usually comes in the beggining, and at the very end after all is calming down and I've released boost/ the throttle. While at WOT, it stays right at 11.0 for the longest time--- at least for while my eyes can catch it. I try to keep a good eye on it, and it at least stays green during WOT--- not sure if it's keeping 11.0 or not.

So how much more can I play with the boost if I'm getting 11.0 constant through out the entire band at WOT? I'm at 1.0-1.1 bar, probably somewhere around 15 psi-- i'd like to see 18-19-20 psi
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Old Oct 12, 2008 | 09:57 PM
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Ok, updates the CAI no CEL****


I have been doing some thinking, and I realized it's just not worth the minimal gains to gamble with something like a CAI w/o a tune. I stress out everytime I drive my car and it's note even fun anymore. I put the stock box back on, but left the Perrin MAF hose, turbo inlet, and fender part of CAI intact.

This is why I'm aborting the custom CAI:

Personal reasons:
1. Too much stress on myself because I don't enjoy driving anymore. It's always a "test" and not just a "Joy ride". This sucks, and it's not the reason I bought a wrx.

2. Minimal gains for amount of stress, time, and money involved.

3. I'm more reluctant to go off-road, which is the reason why I bought the wrx in the first place. Cheaper on gas than a jeep but can almost go just as far, and is actually fun to drive on the road.



Scientific reason:

For this sole reason I am aborting the whole CAI idea all together because the filter is x amount of distance away from the maf in the stock setup, and changing that is BAD regardless of a tune. To place the MAF sensor correctly with a CAI, the sensor would be placed in the fender, exposing it to all sorts of nastyness. The filter straightens the air as well as bends, flows, plenums, etc. The ridges and form of the stock box also helps aid in smoothing out the air, if you look it channels it perfectly. There are no "air" channels in a CAI.

I'm completely aborting the CAI. Never again. I'm just glad I didn't blow my motor up.
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