I have done a fair bit of searching but I'm still not sure of the answer and want to be sure...

I have recently fitted:
K&N FIPK
Decat
J's racing twin titanium exhaust

My lambda sensor fell apart tonight when removing the cat so I am currently running without one...

Will this be an issue?

I was going to replace the sensor but am I better off fitting a wideband AFR?

Also will I be alright long term without fitting an aftermarket ECU? I am going to Europe/the 'ring in 5 weeks time so fitting an ECU and mapping before hand isn't really viable unless you think it's a must to be safe....

Any input would be massively appreciated guys, the last thing I want is my engine going pop before my euro trip, or even worse, in Europe!

Cheers, Jake

 

With the standard manifold still on there there's nothing to worry about. It's really only after fitting a decent manifold you'd risk it.

 

The Cat sensor is the secondary sensor and is only there to monitor AFR changes to see that the CAT is working. The main AFR sensor is in the manifold.

I run a AEM V2, decat and a tanabe exhaust and my car see's alot of trackdays and i have suffered no problems. I think if you change the manifold its more of an issue. You could get a sensor from rockauto like i did. If you do a search you should have some joy.

You can get a wideband O2 sensors that simulate narrowband but its going to cost you £200 and then the installation and the electrics that need to be done. Its all abit pointless IMO unless your going to get an aftermarket ecu in the near future.

I have had an engine blow before on another car when the standard O2 sensor failed in the rich position. It was a combination of factors of me having a superchip running more ignition advance and an ECU thinking it was running rich all the time and leaning out the mixture. I ended up splitting a liner whilst driving at about 60 under light throttle.

Run decent fuel and you will be fine

 

Cheers guys.
In that case I will just replace the O2 sensor and carry on happy.
I thought that would be the answer but as I will be doing 1200 miles in a week and going around the 'ring it seemed silly not to ask!

My plan is to change the manifold for a J's racing one but I guess that will wait until I get an AEM ECU and can do it safely

Cheers again, Jake

Sent from my GT-N7105 using Tapatalk

 

Running lean also saves on fuel!

 

Has anyone done back to back runs isolating the manifold with a stock ECU? I didn't think so.

If you look at a standard AFR, you'll see in the low 14s as you get to VTEC and then mid 11s as you get to over 8000.

Here is a run with Brian crower cams and you can see that with Brian Crower stage 2 and stock there is hardly any change in max afr, and that is CAMS, bollocks to your manifold.

https://www.s2ki.com/s2000/topic/851...ms-13whp-gain/

Believe what you want, but the proof is out there.