GT 2.0 JTS-To remove the cats or not to? - Alfa Romeo Forum
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(Post Link) post #1 of 5 Old 22-11-11 Thread Starter
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GT 2.0 JTS-To remove the cats or not to?

Hi guys,
as title says....why not to remove the cats and gain some bhp,considering that there's not a problem during the next MOT?

Waiting for the experts..............
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nope... it's pointless... its a 2.0 JTS...

not worth 1) the cost 2) the effort 3) MCSF light/emissions hassles 4) may have alter the sound unfavorably...

on the jts you have pre-cats in the headers and the main cat... i assume u mean remove all of them, which is really not smart, no chance of escaping the MSCF and possibly being down on power due to the lambda misreporting...

you would need to factor in the cost of a proper bosch motronic specialist to remap and modify the system to take advantage of the change..

and with a coked up JTS, its, as i say... utterly pointless... even brand new they don't make advertised power.... they are basically a more torquey TS at best.

i'd reserve this kinda work for something like a GTA, that may actually realise some top end, esp after trading some low end for a bit more aggressive cams. Full exhaust and remap + "few breathing mods" may be looking at a handy 280hp @ crank.
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(Post Link) post #3 of 5 Old 23-11-11 Thread Starter
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I see....a pointless mod then...
Thanks Wankski
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There is no main cat on a JTS. There is only that pair on the manifold section, the thing underneath the body of the car is just a silencer.

I don't think its a good idea, if you want more power just sell it and buy a V6.
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ahh, i assumed it was as there is a 3rd lambda reading in FES for the JTS...

i guess it has to be anyway to compare engine exit condition to after catalyst condition (as the two lambdas near the engine are before catalyst IIRC)...

either way, you'll need to deal with the lambdas one way or another....
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