DE-CAT ?

[CB3]

i have a 2.4 i-vtec dohc on 53 plate.
looking to increase the bhp a little, as the standard unit is 190bhp.
im looking for a good de-cat or maybe an induction pipe for cold air.
any thoughts or recomandations much appreciated . . .

[PJ S]

No real gain unless you do the air intake, and cat-back too - 15bhp should be achievable then.
Having spoken with a custom exhaust company, they consider the manifold to be actually very well designed, so nothing really to be gained from there.
Going titanium (at a cost!) would be better still, as you'll lose a fair bit of weight 15kg or so.
De-Cat or hi-flow Cat (2-300 cell) would be in need of lengthened sensor port, to prevent the EM light from falsely activating.

[Animal]

Remember that a decatted car will fail an MOT on emissions.

[razzele]

The reality is to get any significant gains you will need to retune the ECU or the engine will run lean after fitting a high flow exhaust and air intake.

[PJ S]

Possibly, but iirc the 2.4 lump tends to run rich as standard at VTEC.
Given the Acura TSX is our Accord with the 2.4 engine, Hondata should have something on their site about standard state of tune, and again, iirc, many TSX owners have gone CAI/hi-flow only, leaving the Hondata aside, and I've not seen/heard any untoward issues as a result.

[beaniexx]

using a de cat is a nice cheap upgrade but you will not really increase bhp much at all but will increase torque.
air intakes on hondas are very sensitive to change as honda oem set up 9 times out of 10 perform better on rolling roads.
i found that an induction kit lost alot of low cam torque but gained more torque on high cam ie vtec felt more aggresive but sounds lush on crossover.
also defo get your air fuel ratio checked as they can run really lean and that could be doing internal damage.

best results we found is keep the oem air intake and just use a k-n panel filter, less air ristriction and more noise, and dyno results proved this.

good luck