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earlyrolla Regular Location: Perth Registered: May 2003	Re: MAP sensors? Fri, 12 August 2005 12:11 What exactly does the Unichip allow you to do? Can you change the table the software uses to convert the voltage reading of the MAP sensor into pressure? The ECU uses a lookup table to determine the pressure based on the voltage from the sensor. If you can change this table to suit the sensor you are using then you should be able to use the ECU safely with a different sensor. I strongly emphasize SHOULD. It all depends on other limits/clips that may be present in the software... You can't simply convert a MAP into a MAF signal. MAP uses a method called speed density to determine the airflow, this also requires a measurement of manifold temperature. AFM (air flow meter) and MAF (mass airflow meter) are different names for the same thing. There are two basic types of airflow meters, frequency type (Karmen Vortex) and analogue type (Hot Wire). There are factors that influence the placement of the meter but I won't bore everyone with details There is nothing wrong with using a MAF meter!!! Be careful if you think you can just swap a larger diameter meter from a different engine onto yours though. Similar to the MAP sensor table, the ECU has a table which is calibrated to use a particular brand/model of MAF meter. If you are attempting an reasonable improvements just fork out the extra dollars and go an aftermarket ECU, there are so many about for around the $1200+ range I wouldn't waste my time with interceptors and the like. [Report message to a moderator]

	Subject	Poster	Date
	MAP sensors?	Big Rob	Thu, 11 August 2005 11:03
	Re: MAP sensors?	shinybluesteel	Thu, 11 August 2005 11:07
	Re: MAP sensors?	Big Rob	Thu, 11 August 2005 12:20
	Re: MAP sensors?	Norbie	Thu, 11 August 2005 23:43
	Re: MAP sensors?	Merudo	Fri, 12 August 2005 02:18
	Re: MAP sensors?	rob_RA40	Fri, 12 August 2005 02:28
	Re: MAP sensors?	draven	Fri, 12 August 2005 02:39
	Re: MAP sensors?	Big Rob	Fri, 12 August 2005 05:57
	Re: MAP sensors?	berad	Fri, 12 August 2005 06:44
	Re: MAP sensors?	THE WITZL	Fri, 12 August 2005 07:34
	Re: MAP sensors?	Big Rob	Fri, 12 August 2005 07:42
	Re: MAP sensors?	Norbie	Fri, 12 August 2005 08:43
	Re: MAP sensors?	Big Rob	Fri, 12 August 2005 09:59
	Re: MAP sensors?	earlyrolla	Fri, 12 August 2005 12:11
	Re: MAP sensors?	Big Rob	Sat, 13 August 2005 09:11
	Re: MAP sensors?	earlyrolla	Sat, 13 August 2005 11:04
	Re: MAP sensors?	THE WITZL	Sat, 13 August 2005 22:15
	Re: MAP sensors?	THE WITZL	Sat, 13 August 2005 10:53
	Re: MAP sensors?	Norbie	Sun, 14 August 2005 06:36
	Re: MAP sensors?	Big Rob	Sun, 14 August 2005 07:26
	Re: MAP sensors?	oldcorollas	Sun, 14 August 2005 07:36
	Re: MAP sensors?	Big Rob	Sun, 14 August 2005 07:42
	Re: MAP sensors?	Chris Davey	Mon, 15 August 2005 04:26

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