Hey bud i had the same problem once get high flow cats or cut them out completelywhats up guys?! i just wanted to hear some input on this!! this is my second mustang. its a 99 4.6 5speed and she feels very slow! previously i owned a 94 with a built aod, 4.10's, i/h/e, 75mm tb, afr 164's, e-cam, ford racing lower im, trick flow upper im, 40lb reds, 195lb fuel pump, 3200 stall, and lots more. it was alot faster than this car! i know it was built up and i have beaten several 4.6's but after driving my best friends 02 5speed gt i really wanted to get one for the reliability, 5 speed, and look.. my buddy has accel coil packs, off road x, custom flowmaster single chambers, intake, underdrive pullys, and supposedly a canned tune. the problem is i raced him and he flat out smokes me... its absolutely no competition and he burns half through second when i can just barely chirp it! what's the big deal?! how does he beat me so bad?! he is my best buddy and i know his car inside and out theres no tricks or funny stuff going on here. he only has a couple things done and its that much faster? i have replaced all the plugs and cops. when im in my friends car it has power all through the rpms when mine seems to have a mid range band that it likes. the power straight flattens out at about 3500+rpms. my brothers 04 spec v puts up a fight from a roll! this is rediculous! i originally planned on doing mainly appearance mods to the car but i may have to do something about this first! how much can i gain with a off road x pipe and a tune? the only mods i have are a volant intake and borla catback.
Hey bud all these model cars you can delete your cats and then use the programer to delete the rear o2 sensors and it will run just fine. I did it to my 04 gt and and i gained 20HP to the ground on the dyno with no problems.Off hand i dont know what thw codes are but i am going to assume the codes are going to read that your cats are bad.same as if you had removed them
Hey bud all these model cars you can delete your cats and then use the programer to delete the rear o2 sensors and it will run just fine. I did it to my 04 gt and and i gained 20HP to the ground on the dyno with no problems.
well see thats what i thought too but when i cut my cats off and deleted the rear o2s i also had no mufflers. From 1 day i had put down on the dyno 363RWHP and the very next day early in the morning i cut the cats and such, went back to the dyno and put down 383RWHP. I cant explain it bud ii really cant. currently im in asscrackistan but as soon as we get home ill get the dyno sheets and post them.I know this..i mod/tune these cars on a daily basis...i know youre just providing helpful input so dont take this as me snapping back or being a jerk
Not to be a **** but there is no way you got a 20hp increase by just cutting out the cats..
well see thats what i thought too but when i cut my cats off and deleted the rear o2s i also had no mufflers. From 1 day i had put down on the dyno 363RWHP and the very next day early in the morning i cut the cats and such, went back to the dyno and put down 383RWHP. I cant explain it bud ii really cant. currently im in asscrackistan but as soon as we get home ill get the dyno sheets and post them.
well see thats what i thought too but when i cut my cats off and deleted the rear o2s i also had no mufflers. From 1 day i had put down on the dyno 363RWHP and the very next day early in the morning i cut the cats and such, went back to the dyno and put down 383RWHP. I cant explain it bud ii really cant. currently im in asscrackistan but as soon as we get home ill get the dyno sheets and post them.
N8dogg98,
I had a KB 2.1L, 42 PSI injectors, boosta pump, cold air of course, 255LPH ford focus fuel pump, deleted my CATs and rear o2 sensors, and deleted my PPRV. i think thats it bud.
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