Quote:
Originally Posted by
MrT13
Euhm,no... What does it do and what's the diffrence?
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The O2 controller fixes the A/F ratio at 13.6:1 in the closed loop. Without an O2 controller the closed loop is controlled by the 02 sensor and ECU and kept to a ridiculously weak 14.7:1 in the closed loop.
The catch is, when you fit a fuelling mod, it will quite successfully control the open loop fuelling (so you can achieve an ideal 13.2-13.6:1 A/F ratio) but it will do nothing for the closed loop fuelling. Basically whenever the conditions dictate that the ECU operates in the closed loop (low rpms, small throttle openings, cruising etc.) your bike is going to be hamstrung with a weak A/F ratio.
Fitting an O2 controller will give you better control of the fuelling in all conditions - it takes it out of the hands of the ECU.
What this all means in real life (on the road) is that the bike will pull much more smoothly from lower revs and give you a much broader spread of power, as well as increasing the usable rev range of the motor.
Quote:
Originally Posted by
MrT13
however,I am still doubting to fit the PC. Am a little worried about damaging my engine. Anybody ever had engine troubles after using the mod and doing serious milage?
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I used Kev's fuelling mod for four and a bit years on the Tenere, covering somewhere in the region of 20K miles without the slightest problem. For the last two and a half of those years I ran Kev's O2 controller as well, again without issue. They are both brilliant mods and WILL make a big real world difference to the way your XT runs. The best thing is, they are both cheap at around �100 together - you get a lot of satisfaction for your money.
I have had a PCV and O2 Optimizer fitted for a while now, and use a custom map built on the dyno. This set up is better, but I would say from experience, only if you visit a dyno centre and get a custom built map. All in all I think it cost me around the �500 mark - not exactly cheap!
A PCV is the perfect solution, but is it �400 better than using Kev's mods? Probably not. In terms of "bang for your buck", Kev's mods are hard to beat and offer an excellent balance between performance and financial outlay.
I guess the answer to your doubts is really down to how deep your pockets are... and how tolerant your missus is!
