Bear in mind those tests were done on an F. The TF breathing system is very different amongst other things.cahzz said:yeh ive got a 160 vvc, so if a fit a decat i will LOOSE power?? ive never come across an engine that looses power when the cats removed?? is it something to do with the k-series? or VVC?
straffs said:Bear in mind those tests were done on an F. The TF breathing system is very different amongst other things.
Your right, the Tf has modified airbox, and a different exhaust, but the VVC, (Variable Valve Control, or Very Very Complicated) is pretty much the same.
If you check the tests Rob carried out, he thinks the VVC needs some `back pressure` to give the full benefit!, which is lost when removing the cat!.
G.C said:Yep, ive done it. mainly because my cat was shot and i didnt want to fork out for a new one. It does feel slightly more responsive and also sounds sportier. I had a stainless back box on it but it was too loud, so took it off and leftthe bypass on.
Another tip, very blue peter this one but good none the less, when my back box went i replaced it with a used backbox from another F. Poblem was tho, that the tail pipes were a wee bit rusty. So what i did was take to them with a hack saw and cut them off!!!!then went to the local auto store, shelled out on some good quality SS exhaust tail pipe finishers, possitioned these where the original tail pipes were, drilled a hole through the bottom of the valance and marked the tailpipes to be drilled. when id drilled them i simply bolted the new tail pipes to the valence with the actual exhaust exiting through these. Then bobs your mothers brother, new tail pipes on yor old exhaust! works a treat and looks as good as the real thing, beats the original (and rusty in my case ) pipes. You cant tell that these are just bolted on finishers as all you see is the tailpipes and yes the fumes do come through them.