MAT Upgrade
Thread Starter
Drifting
Joined: Sep 2001
Posts: 1,651
Likes: 0
From: Ocean County NJ
MAT Upgrade
What do you guys think of the MAT upgrade/relocation.....I read a post that it does nothing but cause detonation..is this true? I had one on my 00 and thinking of putting on my 99 along with the vortex power duct....also on my 00 I located it in the front most part near the MAF on the underside of the powerduct.
Thanks
Marc
Thanks
Marc
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: MAT Upgrade (skidmarc)
How a relocated MAT causes Detonation is beyond me... :rolleyes:
The MAT sensor is there for one reason..To tell the PCM how hot the air is coming in. Depending upon how hot the air is and the engine load it pulls timing from 1 to 6 degrees..
If you are getting detonation you either have other problems or the Air temps are astronomically high.
I have run a timing tricker which forces the PCM to read 57 degrees regardless of the real temps and never got detonation. I have since zero'd out my IAT table to kill any temp induced timing retard... ;)
Don't waste your money on the relocated MAT, just go to Radio Shack and get a 4.7K ohm resistor and plug it into the socket for the IAT sensor. This will make the PCM think it's reading 57 degree air..
[Modified by chuckster, 1:59 PM 10/31/2002]
The MAT sensor is there for one reason..To tell the PCM how hot the air is coming in. Depending upon how hot the air is and the engine load it pulls timing from 1 to 6 degrees..
If you are getting detonation you either have other problems or the Air temps are astronomically high.
I have run a timing tricker which forces the PCM to read 57 degrees regardless of the real temps and never got detonation. I have since zero'd out my IAT table to kill any temp induced timing retard... ;)
Don't waste your money on the relocated MAT, just go to Radio Shack and get a 4.7K ohm resistor and plug it into the socket for the IAT sensor. This will make the PCM think it's reading 57 degree air..
[Modified by chuckster, 1:59 PM 10/31/2002]
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Re: MAT Upgrade (chuckster)
How a relocated MAT causes Detonation is beyond me... :rolleyes:
The MAT sensor is there for one reason..To tell the PCM how hot the air is coming in. Depending upon how hot the air is and the engine load it pulls timing from 1 to 6 degrees..
If you are getting detonation you either have other problems or the Air temps are astronomically high.
I have run a timing tricker which forces the PCM to read 57 degrees regardless of the real temps and never got detonation. I have since zero'd out my IAT table to kill any temp induced timing retard... ;)
Don't waste your money on the relocated MAT, just go to Radio Shack and get a 4.7K ohm resistor and plug it into the socket for the IAT sensor. This will make the PCM think it's reading 57 degree air..
[Modified by chuckster, 1:59 PM 10/31/2002]
The MAT sensor is there for one reason..To tell the PCM how hot the air is coming in. Depending upon how hot the air is and the engine load it pulls timing from 1 to 6 degrees..
If you are getting detonation you either have other problems or the Air temps are astronomically high.
I have run a timing tricker which forces the PCM to read 57 degrees regardless of the real temps and never got detonation. I have since zero'd out my IAT table to kill any temp induced timing retard... ;)
Don't waste your money on the relocated MAT, just go to Radio Shack and get a 4.7K ohm resistor and plug it into the socket for the IAT sensor. This will make the PCM think it's reading 57 degree air..
[Modified by chuckster, 1:59 PM 10/31/2002]
Ed
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: MAT Upgrade (C5XTASY)
How a relocated MAT causes Detonation is beyond me... :rolleyes:
The MAT sensor is there for one reason..To tell the PCM how hot the air is coming in. Depending upon how hot the air is and the engine load it pulls timing from 1 to 6 degrees..
If you are getting detonation you either have other problems or the Air temps are astronomically high.
I have run a timing tricker which forces the PCM to read 57 degrees regardless of the real temps and never got detonation. I have since zero'd out my IAT table to kill any temp induced timing retard... ;)
Don't waste your money on the relocated MAT, just go to Radio Shack and get a 4.7K ohm resistor and plug it into the socket for the IAT sensor. This will make the PCM think it's reading 57 degree air..
[Modified by chuckster, 1:59 PM 10/31/2002]
Interesting post. I have noticed that between 75 and 80 degrees outside air temp, there is a difference in off the line punch (decreases). One question: If a timing tricker resistor is installed, as you can't always hear knock with the human ear due to exhaust noise or the knock being subtle, are the knock sensors sensitive enough to protect the car by backing off timing if knock does occur at higher temps? Thanks!
Ed
The MAT sensor is there for one reason..To tell the PCM how hot the air is coming in. Depending upon how hot the air is and the engine load it pulls timing from 1 to 6 degrees..
If you are getting detonation you either have other problems or the Air temps are astronomically high.
I have run a timing tricker which forces the PCM to read 57 degrees regardless of the real temps and never got detonation. I have since zero'd out my IAT table to kill any temp induced timing retard... ;)
Don't waste your money on the relocated MAT, just go to Radio Shack and get a 4.7K ohm resistor and plug it into the socket for the IAT sensor. This will make the PCM think it's reading 57 degree air..
[Modified by chuckster, 1:59 PM 10/31/2002]
Interesting post. I have noticed that between 75 and 80 degrees outside air temp, there is a difference in off the line punch (decreases). One question: If a timing tricker resistor is installed, as you can't always hear knock with the human ear due to exhaust noise or the knock being subtle, are the knock sensors sensitive enough to protect the car by backing off timing if knock does occur at higher temps? Thanks!
Ed
Yes the knock sensors are always working...period. They sense knock and pull timing immediately.
The IAT retard table pulls timing whether it's needed or not..It is not based on knock.
Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: MAT Upgrade (chuckster)
The relocated MAT Sensor caused me to have 8 degress of knock retard on my 00, I think it did work for years 98-99!
have one in the garage for sale, $15 free shipping!
have one in the garage for sale, $15 free shipping!
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: MAT Upgrade (wallstAL)
The relocated MAT Sensor caused me to have 8 degress of knock retard on my 00, I think it did work for years 98-99!
have one in the garage for sale, $15 free shipping!
have one in the garage for sale, $15 free shipping!
If you were tapping then WHAT temperature was being shown by the relocated sensor?
There could not be a great deal of temp diff at all.
I suspect people had bad sensors that actually caused the PCM to see a high temp instead of the intended low temp..
I be interested in seeing if the resistor trick would cause the same k/r... It does not add up
Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: MAT Upgrade (chuckster)
The relocated MAT Sensor caused me to have 8 degress of knock retard on my 00, I think it did work for years 98-99!
have one in the garage for sale, $15 free shipping!
I am curious...If you got 8 degrees of k/r then you must have been Autotapping..
If you were tapping then WHAT temperature was being shown by the relocated sensor?
There could not be a great deal of temp diff at all.
I suspect people had bad sensors that actually caused the PCM to see a high temp instead of the intended low temp..
I be interested in seeing if the resistor trick would cause the same k/r... It does not add up
have one in the garage for sale, $15 free shipping!
I am curious...If you got 8 degrees of k/r then you must have been Autotapping..
If you were tapping then WHAT temperature was being shown by the relocated sensor?
There could not be a great deal of temp diff at all.
I suspect people had bad sensors that actually caused the PCM to see a high temp instead of the intended low temp..
I be interested in seeing if the resistor trick would cause the same k/r... It does not add up
[Modified by wallstAL, 8:07 PM 10/31/2002]
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Le Mans Master
Joined: Nov 2000
Posts: 6,266
Likes: 156
From: Galloway Twp. NJ
Cruise-In VII Veteran
Re: MAT Upgrade (wallstAL)
The relocated MAT Sensor caused me to have 8 degress of knock retard on my 00, I think it did work for years 98-99!
have one in the garage for sale, $15 free shipping!
have one in the garage for sale, $15 free shipping!
:cheers:
Racer
Joined: May 2001
Posts: 304
Likes: 0
From: Bryn Mawr PA
Re: MAT Upgrade (skidmarc)
Believe this is useful only up to 98 models. I installed one on my 99 FRC and although bottom end felt marginally stronger, detonation started at 5500 and then timing also pulled back on full throttle acceleration.
Bottom line, a waste of $ on 99 and up!
Bottom line, a waste of $ on 99 and up!
Le Mans Master
Joined: Nov 2000
Posts: 6,266
Likes: 156
From: Galloway Twp. NJ
Cruise-In VII Veteran
Re: MAT Upgrade (skidmarc)
ok what exactly is detonation??
my timing was also being pulled at higher RPM's, I went back to the factory IAT sensor and everything was fine. :cheers:
