Quote Originally Posted by Jake Casson
Thanks, but what are you saying mholebrook?

Ive had this car since I was 18 (now 22) and have restored it, spending around 15000 pounds on it. This includes rebuilding the top end (didnt really need it) porting the head and fitting a performance cam, power boost valve, eco tec valves, K n N panal filter (induction kit actually reduces the power on these as cold air feed is poor). It runs on 18s and looks perfect so I really dont see what your going on about "mholebrook"......?

I want to take the cats off as they've rusted away quite abit anyway, plus I dont need them for the MOTs. Surely they restrict the flow? How come the pre 1990 cars dont have cats nor a lamda? What will happen if I didconnect it? Thats the whole point as I then can turn the fueling up?
Mike's suggestion is solid (There are "high flow" aftermarket alternatives), but if you were really determined to dump the cats, it would not really be an issue as your 02 sensor is before the cat... If you do remove the cats, make sure your entire exhaust system is set-up that way so that you make ponies in the right places instead of losing them... You can add and FPR, larger fuel injectors (the Ford Mustang injectors work great), and a higher-flow fuel pump--but these in and of themselves will not guarantee a lot more horsepower. Judging by the mods you have done (the ported head, etc.), it might just be worth it to try, however... Oh, and also as someone suggested, get a good chip--no sense going cheap at this point...