I know the Mustang dynos yield lower HP readings than the Dynojets, but what about using a Mustang dyno for before and after testing?
If a mod is worth say 25hp on a Dynojet dyno, would testing that same mod in before and after fashion on a Mustang dyno yields less of a differential than I'd seen on the Dynojet?
Update meaning the older Mustang dynos would have be reading on par with the newer ones? Or only the newer ones have had changes made to put them on par with the Dynojets?
There is something wrong with the dyno if the delta is not the same.
How do you figure? A mustang dyno is not always a fixed number off, is it? If it were the case, anything with say, 40 hp would read as zero. Of course we know that isn't the case. I would imagine that it is a percentage difference from the dynojet which would mean that if a mod were performed, the power improvement would show up proportionately off the dynojet figures by the same amount.
So you are saying there is nothing wrong with a dyno that does not use a linear algorithm to calculate power?
Horsepower = (Torque* RPM) / 5252
Seems pretty linear to me…
I guess there could be some mechanical issue I am not taking in to affect. It could explain a non linear relation.
I still think, there is something wrong with one of the dyno's if the delta is not the same (or very close).
If a car has 400rwhp on dyno A and 440 on dyno B, what would you expect dyno B to record if dyno A shows 420rwhp after an exhaust mod? Would you expect to see 460rwhp? If you would, that is an argument that one of the dynos is just shitting out numbers and not actually using the age old formula for deriving hp invented by Mr Watt. (by watching mules carry coal)
The issue here is most likely how the torque is measured. Not all dynos use the same method to measure torque so that would be the most logical thing to look at when certain dynos are known to always read higher or lower than another model, which by the way they usually read off by a fixed percentage, not a fixed number.
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You're gonna need a bigger bat!
If a car has 400rwhp on dyno A and 440 on dyno B, what would you expect dyno B to record if dyno A shows 420rwhp after an exhaust mod? Would you expect to see 460rwhp? If you would, that is an argument that one of the dynos is just shitting out numbers and not actually using the age old formula for deriving hp invented by Mr Watt. (by watching mules carry coal)
The issue here is most likely how the torque is measured. Not all dynos use the same method to measure torque so that would be the most logical thing to look at when certain dynos are known to always read higher or lower than another model, which by the way they usually read off by a fixed percentage, not a fixed number.
If the relationship is not linear one (or both) of the dyno’s is not calibrated.
Well.. I was just trying to decide between two local dynos to see how well a mod's working. I know it's working well - just want to find out how well!
I'll probably just go with the Dynojet shop. A little cheaper, closer, and they have an elevated setup-I'll be able to do some changes in between pulls easier.
Well.. I was just trying to decide between two local dynos to see how well a mod's working. I know it's working well - just want to find out how well!
I'll probably just go with the Dynojet shop. A little cheaper, closer, and they have an elevated setup-I'll be able to do some changes in between pulls easier.
Not sure of your setup, but if you are turboed, a mustang will give you a closer approximation of your mod's effect on the street. The reason is because it can load the car harder than a dynojet.
Not sure of your setup, but if you are turboed, a mustang will give you a closer approximation of your mod's effect on the street. The reason is because it can load the car harder than a dynojet.
So if two identical cars were doing the same before and after mod testing but on different dynos , the car testing on the Dynojet dyno would see his mod recording a higher differential than the guy on the Mustang dyno?
So if two identical cars were doing the same before and after mod testing but on different dynos , the car testing on the Dynojet dyno would see his mod recording a higher differential than the guy on the Mustang dyno?
Linear Mode
