Removed CIA, Hot, & Cold Pipes - Faster Now - Pontiac Solstice Forum
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post #1 of 5 (permalink) Old 01-02-2013, 10:43 AM Thread Starter
David Dougherty's Avatar
Join Date: Dec 2005
Location: Campbell, CA
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Removed CIA, Hot, & Cold Pipes - Faster Now

Been running DeJon plumbing for last 4-5 years, looks and sounds great!! But I live in CA and needed to do it's first smog check, so I removed the DeJon pipes and put it back to stock. Runs much faster now and am getting much higher boost (went from 17psi. to 22psi. peak). Anyone have similar experience?

Future so bright I have to wear shades!!!

Mean GXP (VIN 117835 11/06 )
Name: Growler
Name: Growler (Vin #4878) Traded for Mean GXP 3/19/07
Mean, dark side, ebony leather w/red stiching, LSD, ABS, AC, Monsoon 6CD changer, mats , headliner, stability control, XM, power pkg., convenience pkg., chrome wheels, sport peddles, Fiam Air Horns, Magnaflow, De-badged, shortened waste gate rod mod.
Garage Mates: 2005 Yamaha FJR1300, 2003 Yukon w/K&N CAI, 2003 Honda CRV
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post #2 of 5 (permalink) Old 01-02-2013, 12:51 PM
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You'll need to search ('cos I can't remember which) but I recall that a number of aftermarket CAI's can muck-up the airflow around the MAF and thus reduce performance. I know that DDM's and the GMPP CAIs were OK, and there was at least another that was fine but can't recall if DeJon was in that short list.

Owner of "Campbelle", a Brazen 2008 GXP ... with mods piling up...
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post #3 of 5 (permalink) Old 01-02-2013, 01:20 PM
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No the Dejon was not on the short list.

Aggressive GXP at $25,995.00 shipping of $600, MT.
Air, $960; Chrome Wheels, $545; PCQ, Premium Package (Leather), $525; Radio, 6-Disc with MP3, $495; Monsoon, $395; Premium Acoustic Headliner, $150; and Sport Metallic Pedals, $115; all totals $29,180.00.
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post #4 of 5 (permalink) Old 01-07-2013, 10:20 AM
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The GMPP and the K&N do not change the fuel trims, the Dejon absolutely does that's why I have one. The first 2 are BLING, what's the point if they don't flow more air? I did scans and had my fuel trims adjusted to optimum with the added air, (added more fuel) more air more fuel more GO! Bottom line if you change your CAI you should check the fuel trims.

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post #5 of 5 (permalink) Old 01-07-2013, 10:54 AM
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I had the DJ charge tubes and CAI on my car. They made some slight contribution. In the dyno data I had seen, the results suggested that for low and mid range the charge tubes did not make a big contribution. But I have seen data that suggests that they reduce the roll off at higher revs where the turbulence becomes a bigger factor. I was seeing boost similar to others ~23 to 25 pounds of boost regularly.

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