Do a search for a mechanical O2 sensor. I have a test pipe and i have yet to get a CEL. THe mod is something like 2-3 bucks.

Do I need to use that even if I am using a different ECU?

StevenM has previously stated that the secondary O2 sensor is not needed for the Mugen ECU and Marco says at the end of the first page of this thread that its the same for the J's racing ECU.

TBH, I think you are getting carried away with the manufacturer's claims on a lot of these mods AB, alot of owners spend ALOT of money for pretty minimal gains. With that in mind, and bearing in mind that you are not going to go FI in the future or ITBs, an Apexi VAFC seems like a cheap and effective solution from what people have said. However, if you got that route and want to decat the car, simply create a mechanical O2 simulator and buy the anti fouler plugs from HornyHonda who has been selling twin packs of them on the UK For Sale board for a couple of weeks.

CA - it's taken me a year to decide on a manifold so I don't think I make decisions on a whim. J's racing are reputable tuners in Japan and my friend has been talking to the owner of the tuning company itself.

I have sent them a full list of the modifications for which they send the most appropriate mapping.

Okay - so I won't need the O2 sensor connected but what do I do to the sensor itself?

I know you don't buy on impulse AB, its just that I'm a bit cynical about the bhp claims of the companies involved simply because the replacements parts work together so that one person may see 12 whp and another with a different exhaust and CAI will see a couple of whp improvement. However, if I were going for an aftermarket manifold, I would buy a J's too :)

As for the 02 sensor, the conker season isn't that far away :D

AB :what: Your pi$$ing your money up the wall mate, J's are a great company and make some serious stff but "YOU DONT NEED IT"!!!!!!!!!!!!!!!!!!!!

Every car is different and the stock ecu is MAPed so take all that into account you may find as well that J's wont sell you an ECU as they usually want to MAP it to the car and not just send it off which is the same as Amuse(not 100% though) you will get more gains from a piggyback like the e-mannage or even a HKS F-con(various models) "PLUS" if you change your setup in the future you can just get it MAP'd accordingly :)

Andy

You just put the sensor into the hole of the test pipe... Or you can find a bolt that screws into it
it is then attached but it doesnt work because the ECU disables it.

Andy - Thanks for the advice mate but I don't want to modify the engine any more than I have done. My friend has been in talks with the boss of J's Racing and he is happuy to send me a fuly mappped ECU for my setup.:)

Cheers Marco.

I do remember reading somewhere that the sensor can be damaged is it is not screwed in using an anti folwer thing/ I'll probably just remove it and then re attach for MOT tie with the CAT.

dude, just so we are all clear, you are not sending your car to Japan or flying someone over to tune, right? so your custom mapped J's ecu won't really be optimized for your car, right? Because you know with all the variations between motor to motor that a perfect tune from said ecu is impossible, right?

To be honest, I think it's a waste. I know I wouldn't waste my own money on an ecu that cannot be reprogramed and optimized... but it's not my money, and if all you want is bragging rites, for what it's worth, you'd have em...