Went to the dyno for the first time last Friday with a fellow S2ker. I dyno'ed my car and he dyno'ed his also. Stats for my car: 2002, about 5,000 miles, new VAFC and AEM cai. The first run was with a cool engine and I ran 199.5 hp at the wheels(just with the AEM cai, VAFC not tuned yet). You can see from the graph, by the 8th run, with a hot engine, my car was only putting 184 at the wheels. After letting the engine cool, and tuning the VAFC, we ended up running about 195 at the wheels. The tuner said I gained around 5 hp at the wheels. I'm not sure how much that is at the crank?? We're in Fresno, Ca. and it gets hot here in the summer. It wasn't scorching hot when we dyno'ed the car, but it was hot enough to make a difference IMO(probably around 95 degrees outside). You can see from the chart, it was reading a 91.4 degree F reading in the intake temp. Btw, the last chart got cut off in the middle.

The other S2K is an '01 with around 19,000 miles - mods: Injen Cai, HKS exhaust, VAFC, and lighter flywheel. He ended up putting 207 hp at the wheels. (Dave, if you read this, correct me if I'm wrong about anything).

-Brian

 

something isn't right! your charts seem wat to choppy for me! It should be much smoother. I would say the heat is the problem.

 

its because it doesnt use the full page for the graph.


example

 

something is off with those VAFC settings... why is there a big jump in torque at 3800 and then a subsequent drop?.. torque curve should be a bit flatter.. i think you should change up the VAFC settings.. 193 is a bit on the low side w/ your mods..

 

Torque jumps at 3800 because he has a Injen CAI. Since the piping for either the AEM or Injen CAI's is long, there is a jump of torque early in the power band. If the piping were shorter, it would move that jump of torque later in the power band. Also, I think the tuner f*cked up. The VTEC switchover point should be lowered. There is a huge spike right when VTEC hits, so if you lower it to the "optimum" switchover point you will find more mid-range power under the graph and it will smooth out your VTEC switchover.

 

it doesn't make sense that the torque would jump and then drop back down to the same level...

plus the peak HP numbers seem off..

 

Do a search . . . it is well documented that the AEM/Injen CAI's have this spike of torque at 3800. I have the very same spike of torque at the same spot because of my CAI. His peak HP seems okay as well. Given some more mileage, there should be a little bit more HP in the future.