G40R 2.5 litre Duratec

[jwoffshore]

And here is the Frankenstein Cat stuffed into the G40 wheel arch.



Result was an MOT pass, everything green and back to a normal friendly MOT man. The CO is now well within limits and hydrocarbons in single digit figures, as you would expect with a variable inlet cam running retarded.

[Podie]

Good to hear it's sorted... curious if the MOT place is one I know, as I seem to recall you're local to me (one of the testers can be a bit funny)

[jwoffshore]

Hi Podie. The MOT place in question is just around the corner from where Steve Guglielmi used to be in Daventry. I had best not identify them more than that on the forum. I only used them because the emissions test machine at my usual test station was on the blink. Anyway, never again!

[Podie]

Yep, it's the one I thought it was

[Scrump]

Great to see you still making progress.
Is heat an issue with the cats in such a tight space? Will you be wrapping them?

Interested to see what difference the new cats and the decat pipe make to the engine power.

[jwoffshore]

Yes, the bodywork does get hot, even with some gold self-adhesive heat barrier applied. It's not too bad if the car is moving along, but when sitting idling the side panel behind the front wheel gets so hot you cannot touch it. I might have to tack a shield plate on the outside of the Cat.

Also I have discovered the source of exhaust fumes sometimes entering the cabin. It's coming in at the bottom of the windscreen A post. There is some communication from the inner wheel arch to the A post inside the car. I saw this when the new Cat was burning off some oil/grease residue and smoke was pouring into the cabin like a chimney! I'm in the process of sealing up all the seams which were skipped over in the factory build.

Next rolling road tune will be after I have fitted some 48mm throttles. Then will do Cat and non-Cat runs, but no timetable for that yet.

[GTRene]

Sometimes you also can use a fuel pressure gauge, then when going for a MOT you can set the pressure low that the car just stays active for test operations Co2, then afterwards you can set it again to normal standards.

It helps with a car I once owned, although you now have a better cat system, so good for you :-) but adding (if you not already have one) such adjustable fuel pressure gauge, can get in some cases Co2 down just for test day when its needed.

[jwoffshore]

Thanks for the tip Rene. Unfortunately, the G40 regulator is inside the tank. It's a dead-end system, rather than one that recirculates back to the tank.