How many of those cars use the 1.6 sohc motor that are running those times?? and no is not a threat, just wanted to let you know if I wanted to I could find out who you are and what you drive.. instead of me wasting my time let me ask you, WHAT do you drive??

 

Do you know how the dyna pak gets its hp reading compare to that of a roller type dyno, also will a drifferent FD ratio affect the reading.... which out of them would read a higher number?

 

search me up and your answers will be found

WOWZERS!!!

 

So what do you drive? or should I find out somewhere else besides here>?

 

How exactly were everyone's numbers jacked up? I am assuming you are saying this because your friends Civic didn't make what you guys thought it would? I do not believe you dynoed a car that day if I am correct. Please let me know how everyone's numbers were jacked up so I can understand.

If it is what I am assuming and you are saying the dyno is wrong because your guess at the horsepower was wrong then I can do nothing for that. 99% of the time we have found that the Dynapak reads 10% less horsepower than a standard dynojet roller dyno. The dynapak is a a tool strictly for tuning and eliminates any error by attaching the hubs to the car. If my assumption is wrong and you have another reason please let me know.

The way the Dynapak gets its horsepower is far more accurate than any roller dyno out there. Horsepower numbers can change depending on how a car is strapped down or what tires are used on a roller. Dynapak eliminates any of these issues by attaching the hubs to the car.

A different FD ratio would not make the HP read higher or lower. It would throw the RPM's off but it would not change the output. The only way it would change is if the gear ratio was so far off that the car wasn't in sync with the dyno. An example of this being.... The dyno sees 7k but the car only goes to 5k because the ratio was way off. If that were the case it would show a lower HP number and you would clearly notice this mistake on the graph. I hope that makes sense, if not I will try to make it more clear.

 

Let me ask you this, isnt hp based on a certain rpm?

 

Hp is the same regardless of gearing only torque changes. The dyno will take the input speed(i.e. roller speed for a roller dyno), and take the torque and figure out hp vs. roller speed. If it knows the engine speed often suplied from an inductive pickup or gear ratio calculation then it can use the measured hp, and engine speed and output a torque curve vs. engine speed. If it doesn't have a proper tach signal or gear ratio calculation then it will simply give the wrong torque numbers, but hp will be the same.

 

lower the torque, the lower the reading.. Horsepower numbers are given by multipling torque by rpm/5,252, correct?

 

yes thats correct. So in order for a dyno to figure out your hp it is using the torque and roller speed. This is why if you lose tach signal you will still get a hp curve. So like turbo neon said a different fd ratio will not effect hp.

 

Dynapack gets its rpm signal based on its calculations of the fd, correct? since it does not have a lead from the motor to the control unit of the dyno like dyno jets do...