Catalyser To Group N?

[donkeymatt 0]

Evenin' all,

 

I currently have a catalyser fitted in the exhaust line, and would ideally like to replace from the downpipe with a group N (or similar) system.

 

I have had a look around, but can't find any with fittings for the lambda sensor. Is there any way round this, or do you know of any suppliers that sell these kits?

 

Cheers!

[DamirGTI 342]

Drill a hole up the front of the catalyst , take an 1.6 driveshaft nut , place it on top of the exhaust pipe and weld it all the way around taking care to finish weld without holes/cracks where it might draw air and mess the sensor signal . Apply copper grease on the O2 sensor threads and screw it in , connect the wiring - job done .

 

(do the O2 sensor hole drilling on the exhaust pipe upwards from the horizontal towards the up vertical , so as in the middle @ 45 deg. , as if you make a hole horizontal to down vertical moisture will short the life of the O2 sensor ..)

 

Damir

[welshpug 1,661]

lambda is m18, 1.6 driveshaft nut is m20 so that wont work!

 

plenty of lambda bosses on ebay

[Tom Fenton 1,542]

Actually, the lambda is 18x1.5 and the 1600 shaft 20x1.5.

[DamirGTI 342]

Not sure on that one , but i do know that i used driveshaft nut .. might be from some another car then , cos i have a bunch of nuts and bolts and the one i used was identical thread/pitch as the O2 sensor ..

 

Damir

[donkeymatt 0]

Thanks for the replies, on the hunt for a lambda boss!

This might be another stupid question, but is there any difference in the total length of the exhaust line from the downpipe to the backbox between a model with / without catalyser?

I am eyeing up the OMP group N line...