Changing Cats, Tune?

[Banjo79]

Saving the dolphins on Friday. Finally got the car booked in to go from 100 cell to 200 cell and wondering if a tune is an absolute necessity? Exhaust guy doesn't seem to think it will throw a code or need tuning.

 

[eman1]

Saving the dolphins on Friday. Finally got the car booked in to go from 100 cell to 200 cell and wondering if a tune is an absolute necessity? Exhaust guy doesn't seem to think it will throw a code or need tuning.

Nah no tune needed, at worst just reset a code if it does throw one. Doubt it would though

 

[vr304]

Chances are the rear o2 sensors have been turned off in the tune to suit the 100 cell cats so changing the cats won’t make any difference

 

[Banjo79]

Correct gents. Had some Pacemaker 200 cell pancake type installed. No codes thrown. Drives fine, infact possibly better very low in the rev range. Observation also confirmed by the Mrs.

 

[NewbC4KE]

If I may ask, was your decision to go from 100 to 200 cell to try curb a fuel smell issue ? Is your vehicle currently modified?

 

[Not_An_Abba_Fan]

Changing from 100 to 200 cell cats on a VF 2 still won't meet EPA requirements, the VF 2 is Euro 4 and there are no 200 cell Euro 4 cats.

 

[Banjo79]

Yes. Full exhaust and cai installed around 120000km's ago. Fuel smell was getting slowly worse as time went on. Thought Id start with new higher cell cats and front o2 sensors. Might have reduced fuel smell and morning steam by 30%. Still needs a tune me thinks. Its always been fuelly. Was in talks with prominent mail order tuner about my options.

 

[Banjo79]

Changing from 100 to 200 cell cats on a VF 2 still won't meet EPA requirements, the VF 2 is Euro 4 and there are no 200 cell Euro 4 cats.

Its a VF series 1 if that matters. I'm hoping E85 will have me passing emissions testing if need be.

 

[dimetime]

Changing from 100 to 200 cell cats on a VF 2 still won't meet EPA requirements, the VF 2 is Euro 4 and there are no 200 cell Euro 4 cats.

how does the walkinshaw (difilippo) system pass when getting it fitted from the dealer?

 

[NewbC4KE]

how does the walkinshaw (difilippo) system pass when getting it fitted from the dealer?

Pretty sure it doesn't and I highly doubt any kind of testing is done by "authorised" Walkinshaw dealer in regards to emissions once vehicle is given back to dealership to sell on the forecourt. Pretty sure its a change over of the necessary parts depending on package, wack it on dyno does it get certain numbers Y/N back on truck and certificate comes out of a printer.
Happy days