Long Tube VS Shorty
07-25-2007, 11:32 PM
#11
6th Gear Member
Join Date: Sep 2005
Location: Hamilton, NJ
Posts: 15,042
RE: Long Tube VS Shorty
No that has nothing to do with it. I dont think I have ever seen a set of LT's that were legal. They are illegal because of the placement of the o2 sensor. They have them but they are not located in the proper location so it has to do with something about the readings that it gives out when first starting your car (or something along those lines, not exactally sure). But just do yourself a favor, dont buy cheap long tubes. You WILL regret it when installing them.... BELIEVE ME, I KNOW.
07-25-2007, 11:33 PM
#12
6th Gear Member
Join Date: Sep 2005
Location: Hamilton, NJ
Posts: 15,042
RE: Long Tube VS Shorty
Ohh, I just realized you were going with BBK. I have no personal experience with them. I only have experience with MAC LT's, and believe me, it was the last experience also.
And dont forget, you will need a long tube specific h pipe, its shorter than the stocker because of the length difference in the lt headers.
And dont forget, you will need a long tube specific h pipe, its shorter than the stocker because of the length difference in the lt headers.
07-26-2007, 12:20 AM
#13
4th Gear Member
Join Date: May 2006
Location: Waterford, WI
Posts: 1,485
RE: Long Tube VS Shorty
ORIGINAL: 88BlueGT
No that has nothing to do with it. I dont think I have ever seen a set of LT's that were legal. They are illegal because of the placement of the o2 sensor. They have them but they are not located in the proper location so it has to do with something about the readings that it gives out when first starting your car (or something along those lines, not exactally sure). But just do yourself a favor, dont buy cheap long tubes. You WILL regret it when installing them.... BELIEVE ME, I KNOW.
No that has nothing to do with it. I dont think I have ever seen a set of LT's that were legal. They are illegal because of the placement of the o2 sensor. They have them but they are not located in the proper location so it has to do with something about the readings that it gives out when first starting your car (or something along those lines, not exactally sure). But just do yourself a favor, dont buy cheap long tubes. You WILL regret it when installing them.... BELIEVE ME, I KNOW.
07-26-2007, 12:34 PM
#14
1st Gear Member
Join Date: Jul 2007
Location: ca
Posts: 93
RE: Long Tube VS Shorty
there illegal cause ur messing with the smog system u cant relocate any smogdevice, it has to be in its orginal place. thats why shortys are legal and long tubes are not. everything has to stay in the same place from the maf to the last o2 if u move any of that anywhere els NOT GOOD FOR SMOG.
07-26-2007, 12:47 PM
#15
Join Date: Jul 2007
Posts: 30
RE: Long Tube VS Shorty
A bit of information you might find useful in deciding whether or not to go with long tube headers.
The stock EEC-IV (A9L) calibration requires the O2 sensors to be a certain distance from the exhaust valve (short header distance) in order for the EEC-IV to correctly interpret the signals from the O2 sensors. If you move the O2 sensors farther away, they tend to "cool off" at idle and send a signal that is misinterpretted by the EEC as a lean condition. The EEC responds by increasing the AFR and you end up with a car that runs too rich at idle. This may cause surging and a poor idle, not to mention non-acceptable levels of HC for emission tests. IMHO, if you must have the long tube headers for the extra 2 or 3 HP/TQ
, I would convertto a wide band with narrow band outputs (simulate stock O2 sensors) and ditch the stock O2 sensors as they will not work correctly at idle.
Regards,
Rick
The stock EEC-IV (A9L) calibration requires the O2 sensors to be a certain distance from the exhaust valve (short header distance) in order for the EEC-IV to correctly interpret the signals from the O2 sensors. If you move the O2 sensors farther away, they tend to "cool off" at idle and send a signal that is misinterpretted by the EEC as a lean condition. The EEC responds by increasing the AFR and you end up with a car that runs too rich at idle. This may cause surging and a poor idle, not to mention non-acceptable levels of HC for emission tests. IMHO, if you must have the long tube headers for the extra 2 or 3 HP/TQ
, I would convertto a wide band with narrow band outputs (simulate stock O2 sensors) and ditch the stock O2 sensors as they will not work correctly at idle.Regards,
Rick
07-26-2007, 12:57 PM
#16
4th Gear Member
Join Date: Aug 2006
Location: Miami, FL
Posts: 1,171
RE: Long Tube VS Shorty
ORIGINAL: 5.0rick
A bit of information you might find useful in deciding whether or not to go with long tube headers.
The stock EEC-IV (A9L) calibration requires the O2 sensors to be a certain distance from the exhaust valve (short header distance) in order for the EEC-IV to correctly interpret the signals from the O2 sensors. If you move the O2 sensors farther away, they tend to "cool off" at idle and send a signal that is misinterpretted by the EEC as a lean condition. The EEC responds by increasing the AFR and you end up with a car that runs too rich at idle. This may cause surging and a poor idle, not to mention non-acceptable levels of HC for emission tests. IMHO, if you must have the long tube headers for the extra 2 or 3 HP/TQ, I would convertto a wide band with narrow band outputs (simulate stock O2 sensors) and ditch the stock O2 sensors as they will not work correctly at idle.
Regards,
Rick
A bit of information you might find useful in deciding whether or not to go with long tube headers.
The stock EEC-IV (A9L) calibration requires the O2 sensors to be a certain distance from the exhaust valve (short header distance) in order for the EEC-IV to correctly interpret the signals from the O2 sensors. If you move the O2 sensors farther away, they tend to "cool off" at idle and send a signal that is misinterpretted by the EEC as a lean condition. The EEC responds by increasing the AFR and you end up with a car that runs too rich at idle. This may cause surging and a poor idle, not to mention non-acceptable levels of HC for emission tests. IMHO, if you must have the long tube headers for the extra 2 or 3 HP/TQ
, I would convertto a wide band with narrow band outputs (simulate stock O2 sensors) and ditch the stock O2 sensors as they will not work correctly at idle.Regards,
Rick
07-26-2007, 04:04 PM
#18
Join Date: Jul 2007
Posts: 30
RE: Long Tube VS Shorty
ORIGINAL: nseoi
i need new o2s and im getting longtubes, can you link to the 02 sensors your talking about please?
ORIGINAL: 5.0rick
A bit of information you might find useful in deciding whether or not to go with long tube headers.
The stock EEC-IV (A9L) calibration requires the O2 sensors to be a certain distance from the exhaust valve (short header distance) in order for the EEC-IV to correctly interpret the signals from the O2 sensors. If you move the O2 sensors farther away, they tend to "cool off" at idle and send a signal that is misinterpretted by the EEC as a lean condition. The EEC responds by increasing the AFR and you end up with a car that runs too rich at idle. This may cause surging and a poor idle, not to mention non-acceptable levels of HC for emission tests. IMHO, if you must have the long tube headers for the extra 2 or 3 HP/TQ, I would convertto a wide band with narrow band outputs (simulate stock O2 sensors) and ditch the stock O2 sensors as they will not work correctly at idle.
Regards,
Rick
A bit of information you might find useful in deciding whether or not to go with long tube headers.
The stock EEC-IV (A9L) calibration requires the O2 sensors to be a certain distance from the exhaust valve (short header distance) in order for the EEC-IV to correctly interpret the signals from the O2 sensors. If you move the O2 sensors farther away, they tend to "cool off" at idle and send a signal that is misinterpretted by the EEC as a lean condition. The EEC responds by increasing the AFR and you end up with a car that runs too rich at idle. This may cause surging and a poor idle, not to mention non-acceptable levels of HC for emission tests. IMHO, if you must have the long tube headers for the extra 2 or 3 HP/TQ
, I would convertto a wide band with narrow band outputs (simulate stock O2 sensors) and ditch the stock O2 sensors as they will not work correctly at idle.Regards,
Rick
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