did you change your timing? You can bump it up some............
20 hp from a H pipe and mufflers? That would be nice but it is more like 10-15hp with headers also upgraded.92lxcan said:What i want know is why would the car go slower with Mac headers and removing the cats and factory mufflers and tail pipes,i should have picked up 20 hp.Is it maybe to lean now.
Any help would be great,i think im going to just put a Zex Nitrous system on it.
Thanks.....a mid 13 would be nice and a 12.50 on the Nitrous would be great.
GhostDog 5.0 said:20 hp from a H pipe and mufflers? That would be nice but it is more like 10-15hp with headers also upgraded.
12.5 requires about 350 rwhp which you are definately not close to, only slightly more than stock, which is about 200 rwhp. You would need a much better set of heads and much better flowing intake to break into low 13's and high 12's. Dont put that nitrous system on without upgrading your injectors and fuel pump or you will definately run into bigger problems.
Adding that offroad H pipe and mufflers would more than likely make it more rich than lean.
Have you pulled the codes to see the computer is seeing?