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Old 09-12-2008, 08:41 PM
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Talking My DIY CAI

Well, after studying all of the excellent ideas here, I came up with my own. I bought a Spectre 9 inch cone (specs say it filters to .5 micron) a 4 in to 3 in silicon boot and a 3 inch muffler pipe custom bent to my cardboard template. It works great, I had a K&N drop in, was getting paranoid after reading the threads here. Decided after researching the large NAPA, AFE, K&N, that the Spectre had best filter capacity. It lowered my EGT's by 100 degrees and raised my boost by 2-3 psi. I have a 4in turbo back, no kitty or muffler exhaust. I will try to post some pics tommorow. All in all I have $75 in this and am very happy with the performance. Thanks to all here for the inspiration.

Last edited by phxpsd; 09-12-2008 at 08:46 PM. Reason: spelling
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Old 09-13-2008, 08:18 AM
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Try running a used oil analysis - it will show you on the silicon levels how well your air filtration system is doing.

Schaeffer's, Blackstone labs, OAI

Just make sure you change the oil and run it a good 3-5 K on the new oil & your air intake system. That way you are not running your test from an oil sample that has been in the engine for both air intake systems.
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Old 09-14-2008, 03:15 PM
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Yeah I want to see a Blackstone report!! Not saying it doesn't look good but the Silicon numbers prove filtration. I have the Ford AIS, which is suppose to be the best filtration, and my Silicon levels have been as low as two and are normally around 5. You wouldn't believe what else they can tell you about the life and prognosis of your engine. I sure hope that K&N Drop In wasn't in for a long period of time.

NCH
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