what's the best power curve one should see on a dyno sheet. i have two chips for my car. one with a beautiful horsepower/torque curve that follow each other like a rainbow as a visual. the other chip has almost a straight line of horsepower and then a nice curve of torque??? oddly enough the air/fuel is close to the same on both?

 

Sure it isn't the other way around? Usually Tq will be flatter and fall off at higher RPM while Hp climbs steadily......

 

The shape isn't all that important, it's the area under the curve that makes you faster. Finding the area under an irregualr curve can be tough though. The easiset way is to take the readings at specified and repeated points; every 100, 250, 500, or 1000 rpm or whatever you think works best. The smaller these increments, the more accurate your area will be. Only count the ones that are in a usable range, or better yet watch your tach through a whole run from zero to whatever to see at which rpm your engine spends most of it's time during a WOT situation. This rpm range is where you want your engine to be the strongest. Now add all them up and see which sum comes out higher. Given that you did the same amount of increments for each curve and at the same points the higher one will be the faster of the two. You can do this for horsepower and torque, but they have a linear relationship with rpm, so if you do this correctly they should both tell you the same thing.

As far as the power being diff and AFR being the same, that's not so unusual. There are a lot of variables, even with regards to only the programing of the ecm, other than the AFR that contribute to the output of a paticular combo.

EDIT: This seems a little confusing. If you don't follow me, post the graphs and I'll show you.

 

i understand...