I have searched and searched for some results on what the difference is between the HP numbers a DLL puts out and the HP numbers a Mustang or Dynojet puts out? Does anybody know how far apart these three HP methods read? is there a percentage or something? just curious because i see that alot of people on this forum use DLL and i want to know how accurate that is when compared to a mustang or dynojet dyno? any help would be appreciated.

regards.

 

that question popped out on my mind last night. i would like also to know.

 

dynojet is where its at!

 

Dynojets are all very close to reading exactly like other dynojets. I believe mustang and dyno dynamics arent as close to other ones of the same kind. Mustangs and dyno dynamics if CF is 1.00, should read 10-15% lower that dynojets. Please correct me if Im wrong but I think thats right.

 

Personally, the question I'd rather have answered is which one is CORRECT or very close to the correct amount of power that is transferred to the wheels? I know it's a taboo subject since everyone has their opinions and doesn't want their dyno investment to be bashed.

If you have dynojet reading 550whp and a mustang running 500whp, which one is accurate? we are not talking a 5whp difference. We are talking about a 10% difference in power. So which one is CORRECT?

 

my suggestion would be to not get hung up so much on a number but how the car runs out.. dyno's are nice for comparing changes on the same vehicle, and tuning the management out. comparing numbers is never going to be straight forward. If you know the exact weight of the car and can drive halfway decent, run it down the track and back-calculate hp from there. but even that is an approximation. It'll let you know though which of the dyno readings is closer to how the car acts 'on the road'

 

mostly all of my cars are tuned on a Dynapack... for example, when my STI was bone stock it dyno'd @ 240whp (almost exactly the same as a Dynojet) - given that Subaru claims 300hp that's pretty dead on IMO... Similar bone stock STI on a Mustang and DynoDynamics dynos read ~220whp which provides an unrealistic lose of over 20%...

Most people say that Mustang and DynoDynamics read low, not accurate

 

But not all of us are going to run our cars on the 1/4 mile. Not all of us that do run our cars at the 1/4 mile can do it perfectly. So the 1/4 is not a scientific tool because it relies on too many variables that can be manipulated such as driver experience, tires used, weight, track condition, etc.

When an engine leaves the factory, they know exactly how much power it produces. They use machines for testing. Dynos are themselves a machine for testing. My question is still valid. Which dyno produces the most accurate representation of the horsepower that gets transferred to the wheels?

I'm going to make up some numbers here so don't get too hung up on that. Lets say a car that produces 300whp on a mustang dyno can do a 11.5 in a 1/4. The same car can produce 340whp on a dynojet dyno and do the same 1/4 in 11.5. Obviously the car didn't magically gain horsepower. It remained constant. I know I sound like a broken record, but which is correct? 300 or 340?

 

This is a good response here and goes towards my point. If a car leaves the factor with 300hp produced by the engine. On a dynojet it reads 240, then it loses 20% power when transferring to the wheel. On the mustang it reads 220, it loses 27% power when transferred to the wheel. Obviously only 1 can be correct. I either lose 20% or 27%.

 

a dynojet for an evo loses about 17%hp from the crank to the wheels. If you want what the factory #'s would be get a dynojet reading and multiply by 1.17. ex: 508whp on dynojet=594hp at the crank.

 

The mustang dyno as far as I have heard is more accurate at produceing real world load conditions. Mustang dyno's can be manipulated by weight to change the roller weight I believe. Dynojets are uniform. They do not put the same real world load on the car though. I would think that a properly configured mustang dyno would give more accurate numbers as to what is making it to the wheels. Dynojets will give more consistant numbers when jumping from dyno to dyno. Please correct me if a wrong.

 

another dj vs. md thread...

Mikey

 

DLL and VDR (dynojet setting) are both very very close to an actual Dynojet dyno.

DLL doesnt have a mustang setting, but VDR has a mustang setting and when used, it should give numbers very close to an actual Mustang dyno.

 

Its not a dynojet vs Mustang thread.

Its a how well does DLL compare to a dynojet and mustang dyno thread.

 

LOL am I the only one that has good reading comprehension?

The OP asked how DLL numbers compare to dynojet and mustang numbers.

He did NOT ask if DJ or Mustang were better or try to start another MD vs DJ thread.