Cats to Decats

[SteveW]

Hi Mark,

 

Just a quick one....famous last words.

 

I had my DE350Z uprevved a good number of yeas ago now, about 5. I'm planning on changing from stock cats to decats due to the car becoming a weekend driver and a rattling broken heat shield.

 

I know to get the best of them it would need to be remapped but if I chose not to go for the remap will it pose a problem having increased exhaust flow?

 

I can understand how going the other way, decats to stock cats, would need a remap but will it be safe the other way?

 

Thanks

Steve

[davey_83]

would ultimately need aanother tweak to get rid of the eml as a result of fitting decats

[SteveW]

Thank you but I had the EML driven by O2 sensor switched off at the last UpRev so shouldn't be an issue.....shouldn't lol

[Mark@Abbey m/s]

I would remap 100% as the car would of been leaned off when tuning 1st time with the stock cats fitted. Removing the cats will lean the motor out even more.

 

Will only take a couple of hours on the dyno to tweak the fuelling/ignition and tweaking the cams to get the best from fitting the de-cats

[SteveW]

Thanks Mark appreciate the feedback. I'll get it tweaked when I get round to fitting them.

 

Thanks again