Where's all my horsepower?
Thread Starter
Staging Lane
Joined: Feb 2004
Posts: 95
Likes: 0
Where's all my horsepower? I installed hooker LT and tsp 3 inch true dual exhaust about a mouth ago.I drove the car for a week or two so the computer could learn the new tune.A week ago I noticed an exhaust leak.I fixed the problem on friday.Yesturday I raced my friends modded 350 Z.Before the LT I pulled around two and half cars on him on the highway.After the LT about the same.At the track( 1/8 of a mile) I didn't pick up any mph.What's wrong? Do I have other exhaust leak.Do I need to tune the car or is the exhaust to big for my stock H/C? 
Do you have autotap or anything to monitor the changes with? It's kind of hard to say how much you should lean it out b/c it will vary from car to car. When you have something to monitor with people usually lean it out untill the 02s read about 890-910. Some also just slowly lean it out until they get some knock retard and then they richen it one click. The best way to tune it would be just to get it on the dyno and use a wideband 02 sensor. Try to get an a/f ratio of about 12.8-13.0.
