re-locating mat sensor 1998 c-5
Thread Starter
Instructor
Joined: Aug 2003
Posts: 109
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From: charleston sc
re-locating mat sensor 1998 c-5
has anyone relocated there mat sensor to opposite side of air bridge?and if so, did it help with ignition timing ? meaning was there a noticeable increase in power band,especially in low end? any info would be appreciated :confused:
Burning Brakes
Joined: Aug 2000
Posts: 889
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From: DFW tx
Re: re-locating mat sensor 1998 c-5 (c5-pacecar)
Are you talking about the recalibrated MAT sensor? If so, all it does is fool the computer into thinking it is 20 degrees cooler, thus tricking the PCM to allow for more timing. The mod works OK (can't say how well) but is not necessary if you plan to do LS1 edit.
Thread Starter
Instructor
Joined: Aug 2003
Posts: 109
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From: charleston sc
Re: re-locating mat sensor 1998 c-5 (Jeff Jeff)
i am replacing the air bridge with carbon fiber,i am trying to deside which side of bridge to drill ,i am unsure what you mean by ls1 edit,could you explain?thanx
Burning Brakes
Joined: Aug 2000
Posts: 889
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From: DFW tx
Re: re-locating mat sensor 1998 c-5 (c5-pacecar)
i am replacing the air bridge with carbon fiber,i am trying to deside which side of bridge to drill ,i am unsure what you mean by ls1 edit,could you explain?thanx
The recalibrated (which is also relocated) MAT sensor "tricks" the computer into thinking it is colder. This results in different timing tables used in the PCM which incorporate more timing. You can achieve the same thing with LS1 edit by changing the timing tables.
Hopefully this helps.
Melting Slicks
Joined: Sep 2001
Posts: 2,501
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From: Sunshine State, USA
Senior Member
Cruise-In V Veteran
Re: re-locating mat sensor 1998 c-5 (c5-pacecar)
I have it installed, but you won't notice any SOTP improvement. I did it simply because I wanted the MAT sensor as far forward on the airbridge as possible to sense the cooler air. So when you do drill a hole, just make it as close to the MAF as you can. 2001 and later C5's have the MAT sensor in the MAF itself for this very reason. If you are using the stock airbridge, there is already a flat spot forward that you can use, but if you are using an aftermarket powerduct, it doesn't matter where you drill the hole.
Burning Brakes
Joined: Jun 2002
Posts: 996
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From: Frisco Texas
Re: re-locating mat sensor 1998 c-5 (c5-pacecar)
I have a tricker that makes it 75 degrees always. Works great below 95 degrees but causes knock over 95. Over 95 I just put the iat sensor in the air bridge for correct readings. Adds 2 degrees of timing when its 90 outside with no knock(humidity helps).
