Post by scottydl on Mar 24, 2005 14:47:08 GMT -6
An interesting and informative post from classicalpontiac.com, applicable since we are always talking about HP, torque, and such:
Just want to clear up some misconceptions about dyno measurements.
If you want to know how strong your engine is, you need to load it to the point it won't increase rpm any more. The point that it won't increase rpm is the point at which the engine is carrying the max load and can't carry any more, or any faster.
The dyno with show you three things,
1. RPM
2. Torque
3. HP
1. RPM is the speed the motor is turning
2. Torque is the load that is placed on the engine. The torque curve is a "load chart". It is showing you how much the engine is carrying at that speed.
3. HP is rpm and torque combined. It is showing you the peaks of load and rpm combined. Those values are MAX point if you are at WOT!
Looking at the information is very misleading for these reasons.
1. If you dyno an engine at WOT, obviously it is going to show you the max weight the engine can carry at a specific rpm
2. In the real world, people don't drive around at WOT (I do, but most don't).
3. If you are not at WOT, you are actually lowering the engines ability to do work. If you are at part throttle, you can not carry the same weight or rpm as at WOT obviously. Because of that, the dyno charts are very misleading. Those are loads and speeds that are obtained at WOT.
Data is only good if you know how to interperate it.
If you look at the torque curve you can interperate like this
1. If you see a peak that is the highest value throughout the range, you can bet that that rpm is the strongest. It can "lift" the most weight.
2. If you maintain that rpm at WOT at the rpm that is the strongest, you will accelerate the fastest.
3. If you operate at WOT at that rpm, you will attain your MAX HP the quickest.
4. When you get to max HP you have hit your peak, and will no longer be accelerating.
The biggest problem with the Torque and HP curves is, you need to know how to interprate them. May I suggest learning the HP formula?
HP=torque*rpm/5252
HP equals load times revolutions per minute.
Just wanted to clear some misconceptions about dyno readings.
Just want to clear up some misconceptions about dyno measurements.
If you want to know how strong your engine is, you need to load it to the point it won't increase rpm any more. The point that it won't increase rpm is the point at which the engine is carrying the max load and can't carry any more, or any faster.
The dyno with show you three things,
1. RPM
2. Torque
3. HP
1. RPM is the speed the motor is turning
2. Torque is the load that is placed on the engine. The torque curve is a "load chart". It is showing you how much the engine is carrying at that speed.
3. HP is rpm and torque combined. It is showing you the peaks of load and rpm combined. Those values are MAX point if you are at WOT!
Looking at the information is very misleading for these reasons.
1. If you dyno an engine at WOT, obviously it is going to show you the max weight the engine can carry at a specific rpm
2. In the real world, people don't drive around at WOT (I do, but most don't).
3. If you are not at WOT, you are actually lowering the engines ability to do work. If you are at part throttle, you can not carry the same weight or rpm as at WOT obviously. Because of that, the dyno charts are very misleading. Those are loads and speeds that are obtained at WOT.
Data is only good if you know how to interperate it.
If you look at the torque curve you can interperate like this
1. If you see a peak that is the highest value throughout the range, you can bet that that rpm is the strongest. It can "lift" the most weight.
2. If you maintain that rpm at WOT at the rpm that is the strongest, you will accelerate the fastest.
3. If you operate at WOT at that rpm, you will attain your MAX HP the quickest.
4. When you get to max HP you have hit your peak, and will no longer be accelerating.
The biggest problem with the Torque and HP curves is, you need to know how to interprate them. May I suggest learning the HP formula?
HP=torque*rpm/5252
HP equals load times revolutions per minute.
Just wanted to clear some misconceptions about dyno readings.
