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niterydr · 11-25-2009

Yes your MAS is probably to close to the turbocharger and is getting some feedback. Since the air is being pushed back through the MAS it is being counted twice, and thus your computer puts in more fuel, thus you run richer.

Move it farther away from your turbocharger. The OEM's design the systems to have a good chunk of distance (usually at least 6") from the throttle opening for this exact reason (or in your case the turbocharger). Airflow path needs to be straight leading into and out of the MAS sensor for it to work correctly.

11-25-2009	#7
niterydr back in the saddle again 24 Hours Rally Champion! 3D Pacman white house edition Champion! 3D Racing - Track 2 Champion! ATV Winter Challenge Champion! Bloody Pingu Champion! WRX Racing 2 Champion! Tournaments Won: 5 Join Date: Oct 2003 Location: Elkhart Texas Drives: 2015 Ram Quad Cab Hemi, 1999 FRC Corvette, 93 Stealth Turbo Posts: 6,411	Re: Tuning Questions using 2g Maf Yes your MAS is probably to close to the turbocharger and is getting some feedback. Since the air is being pushed back through the MAS it is being counted twice, and thus your computer puts in more fuel, thus you run richer. Move it farther away from your turbocharger. The OEM's design the systems to have a good chunk of distance (usually at least 6") from the throttle opening for this exact reason (or in your case the turbocharger). Airflow path needs to be straight leading into and out of the MAS sensor for it to work correctly. __________________ My street car runs low 11's and my race car's personal best is a mid 11.... Last edited by niterydr; 11-25-2009 at 07:53 PM.. Reason: typo