Originally Posted by sohc_mshue

like i said you can either use tach signal or gear ratio. Either way changing the FD wont effect hp readings only torque if it has the wrong gear ratio calcs.

Originally Posted by udumkid

but isnt horsepower=rpm x torque / 5250??

Originally Posted by 94 SN4KE

Stop crying about the dyno numbers. Go find a mustang dyno and boost your (or maybe your friends) self esteem.

/thread

Originally Posted by sohc_mshue

Yes. As gearing changes so does torque output and angular velocity output, but horsepower does not change (i.e in a lower gear you will have more torque output, but you will also have a lower output angular velocity).

Originally Posted by 94 SN4KE

Stop crying about the dyno numbers. Go find a mustang dyno and boost your (or maybe your friends) self esteem.

/thread

Originally Posted by udumkid

Ok, so lets put this as an exampleusing the hp tq equation..

if the tq is 125 at 5250 then the hp would be 124...yada,yada,yada...

but then if the torque changes due to the gear ratio(ramber you said tq changes if the fd is incorrect) for example to 115 at 5250, then the hp would be 114...wich is a 10hp loss..

Originally Posted by Turbo Neon

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.

Originally Posted by 94 SN4KE

Stop crying about the dyno numbers. Go find a mustang dyno and boost your (or maybe your friends) self esteem.

/thread

Originally Posted by sohc_mshue

actually if anything a mustang dyno will be the one that hurts your self esteem lol. Those things read very low in comparison to a dynojet.

Originally Posted by 94 SN4KE

Read the comments in bold please.

Now a real life example for reinforcement:
Years ago I dyno'd my Mustang at B&T with their dynapack and made 250rwhp. At the same time another Mustang dyno'd at Excessive Motorsports roller dyno in Manassas, and made 300rwhp. We raced and I won by atleast two cars, shutting down early. I'm sure we could calculate other variables for the win...but the point is that I pulled away hard.

I would rather have ACCURATE dyno numbers, instead of INFLATED dyno numbers to brag about to friends.