IF CHANGE TO NON CAT LAMDA SENSOR WILL MY VR6 GAIN EXTRA PERFORMANCE?

[faigolfgti 0]

Recently i just discover VW have two type of lamda sensor for vr6 obd-1 engine,those with CAT vr6 is using 021-906-265A or B lamda sensor and those non CAT vr6 is using 330-906-265 lamda sensor so my vr6 already CAT remove so if i change to non CAT lamda sensor will i gain extra performance?From what i know those CAT lamda sensor will tune vr6 to run lean fuel inorder to protect the CAT.

[rigs 0]

ALL CAPS IS VERY ANNOYING AND ISN'T GOING TO GET YOU AN ANSWER QUICKER.

[aaronmk2 3]

my engine is a obd2 and i accidently ordered a obd1 lamda since running it i took my car for a rolling road and the car was found to be running very lean i wonder if thats the problem.

[FishWick 21]

OBD1 and OBD2 lambdas are slightly different, so could be a problem. Lambda is ignored at full throttle anyway, so it would only cause a problem on part throttle.

As for peformance gains using a different lambda, there won't be any. That isn't what lambda sensors are for. Their job is to ensure the engine runs at 14.7 AFR to protect the cat converter, no other reason :-)

[aaronmk2 3]

thanks for the info mate so that eliminates the lambda making mine lean.

[faigolfgti 0]

So if change to a non cat lamda sensor for cat remove vr6 should gain some low end power , the non cat lamda will tune vr6 engine to run slightly rich because don't have any cat to protect.

[FishWick 21]

I've never heard of a VR6 not running a cat and having a seperate lambda for non cat applications.

You won't get any more power unless you remap the ECU. The lambda does not affect power output, all it does is tell the ECU how much oxygen is in the exhaust.