Dyno Results

[Dwaynos]

Had the M5 on the dyno today. My intention was to dyno both stock and stage 1 but due to misfires I was unable to run on stage 1.

Stock only for now, Stage 1 in few weeks once I've ironed out the creases.

Results were pretty good, 567 HP and 558 ft lbs Torque.

Let me hear your thoughts.

[Ickdeep]

Originally Posted by Dwaynos

Had the M5 on the dyno today. My intention was to dyno both stock and stage 1 but due to misfires I was unable to run on stage 1.

Stock only for now, Stage 1 in few weeks once I've ironed out the creases.

Results were pretty good, 567 HP and 558 ft lbs Torque.

Let me hear your thoughts.

That's really good numbers. Is it a comp package? Also do you know if they used 4th or 5th gear to get the numbers.

[Dwaynos]

Originally Posted by Ickdeep

That's really good numbers. Is it a comp package? Also do you know if they used 4th or 5th gear to get the numbers.

Not a comp pack no.

He used 4th I think. He didn't think his fans would cool the engine enough at the high speeds you get with 5th. If it wasn't kept cool enough then intake temps would rise causing the ECUs to pull timing resulting in less power.

[OneExtra]

With a stage 1 tune my torque curve was pretty much flat, not sure why yours is all over the place I would say the power is what you would expect for a stock car

What fuel were you running

[AddyDaddy]

Originally Posted by Dwaynos

Had the M5 on the dyno today. My intention was to dyno both stock and stage 1 but due to misfires I was unable to run on stage 1.

Stock only for now, Stage 1 in few weeks once I've ironed out the creases.

Results were pretty good, 567 HP and 558 ft lbs Torque.

Let me hear your thoughts.

Nice is that crank HP/TQ?

[Dwaynos]

Originally Posted by OneExtra

With a stage 1 tune my torque curve was pretty much flat, not sure why yours is all over the place I would say the power is what you would expect for a stock car

What fuel were you running

Not sure, power seems to flatten off and the same time that torque drops, maybe he didn't have traction fully off?

[Dwaynos]

Originally Posted by AddyDaddy

Nice is that crank HP/TQ?

Yes those are crank numbers.

Is it right that mustang dynos read lower? Or is it that mustang read correct and dyno dynamics read higher than they actually are?

[OneExtra]

Originally Posted by Dwaynos

Not sure, power seems to flatten off and the same time that torque drops, maybe he didn't have traction fully off?

I was meaning between 2700 and 4700 the top line (Torque) drops right down

Mine is attached

[Dwaynos]

Originally Posted by OneExtra

I was meaning between 2700 and 4700 the top line (Torque) drops right down

Mine is attached

Oh yeah, never noticed that. . I'll ask him when I go back for stage 1.

[Dwaynos]

Originally Posted by OneExtra

I was meaning between 2700 and 4700 the top line (Torque) drops right down

Mine is attached

Actually, look at your graph. It goes to 900 hp, mine only goes to the max output. Your torque drops like mine but looks less because of the larger graph. Your torque drops down to around 520 where mine drops to 470. An expected difference from stock to stage 1.

[Dwaynos]

Just looked again. I will speak to him when I go back. Maybe he can answer some of these questions.

[OneExtra]

Originally Posted by Dwaynos

Actually, look at your graph. It goes to 900 hp, mine only goes to the max output. Your torque drops like mine but looks less because of the larger graph. Your torque drops down to around 520 where mine drops to 470. An expected difference from stock to stage 1.

Not sure what you mean, my torque stays in growth across the entire usable range

[Dwaynos]

Originally Posted by OneExtra

Not sure what you mean, my torque stays in growth across the entire usable range

Until the end where it drops off while hp still climbs. I see what you're saying about it staying flat though.

[AirBull]

A dyno measures power at the wheels, not the crank. Drivetrain loss can be anywhere from 10% to 15%, and is sometimes less/more depending upon the application. Mustang Dyno's are load bearing dynos and they typically read about 7% to 10% lower than a DynoJet or DynoPack. (Mustang Dyno's are great when you are tuning the vehicle.) Read up on differences between SAE (J1349) and STD. STD will typically be about 3% higher than the SAE calculation. Most shops want higher numbers and will usually post STD; it's all relative to how it's measured and how you want to look at it.

Being that those numbers are nearly what BMW says they are at the crank, (we all know that figure is apparently very underrated,) I'm guessing that your dyno pull posted was STD. Still, even if it were a Comp Pack, those are great numbers for stock.

[Dwaynos]

Originally Posted by AirBull

A dyno measures power at the wheels, not the crank. Drivetrain loss can be anywhere from 10% to 15%, and is sometimes less/more depending upon the application. Mustang Dyno's are load bearing dynos and they typically read about 7% to 10% lower than a DynoJet or DynoPack. (Mustang Dyno's are great when you are tuning the vehicle.) Read up on differences between SAE (J1349) and STD. STD will typically be about 3% higher than the SAE calculation. Most shops want higher numbers and will usually post STD; it's all relative to how it's measured and how you want to look at it.

Being that those numbers are nearly what BMW says they are at the crank, (we all know that figure is apparently very underrated,) I'm guessing that your dyno pull posted was STD. Still, even if it were a Comp Pack, those are great numbers for stock.

He mentioned something about a calculation to change from wheel hp to crank hp. So the number stated is crank hp. He never gave me a wheel hp number.

[BeachM5nster]

Originally Posted by Dwaynos

He mentioned something about a calculation to change from wheel hp to crank hp. So the number stated is crank hp. He never gave me a wheel hp number.

forget that. all that matters is the wheel hp. imho

[Pikey Motorsports]

Originally Posted by BeachM5nster

forget that. all that matters is the wheel hp. imho

We don’t use whp in the Uk so much

[Ickdeep]

That's interesting. I guess its good to know what the engine is making to the crank but in the end of the day, its all about what power actually gets down to the road. Found this interesting article talking about the https://carfromjapan.com/article/ind...d-differences/

[Dwaynos]

Manufacturers don't give WHP figures.

[Ickdeep]

Originally Posted by Dwaynos

Manufacturers don't give WHP figures.

Correct but most people (I think) care about the WHP as that's the "real" number that hits the streets. BMW has been known for lowering their HP. For example, back in 2012 IND took a brand new M5 to the dyno (https://f10.m5post.com/forums/showthread.php?t=740823) . It came back with "527 wheel horsepower". If we convert that whp to hp (12% drivetrain loss) its 590 hp from the crank. BMW stated the engine was 553 hp.

[Dwaynos]

I suppose the real question is still to be answered. Do mustang's read low and others read right or do mustang's read realistically and others read dream world numbers?

[Ickdeep]

Originally Posted by Dwaynos

I suppose the real question is still to be answered. Do mustang's read low and others read right or do mustang's read realistically and others read dream world numbers?

Mustang dynos read ~12% lower than DynoJet

Source BerkTechnology : https://www.1addicts.com/forums/showthread.php?t=214597

1. Dynojet - most popular in the USA. Considered the "standard" here in the states since most shops utilize them. For our theoretical "car", the Dynojet will read 100 rwhp, & 100 ft/lbs of torque.

With this dyno you drive up to the rollers, they strap the car down, and do a full throttle pass in 3rd or 4th gear. The dyno will calculate the power based on how fast the car will spin the rollers. This is called an inertia based dyno.

For WOT power passes that you can compare to each other on the internet, Dynojet's are perfect. They're everywhere! But most do not have any sort of load simulating capability. Since 2005 more and more Dynojet's sold have their eddy current loading device. So you can ID them, Dynojets are typically red or black.

2. Mustang Dyno's - not as nearly as popular as the Dynojet's, but all performance shops that have Mustang dyno's DO have the capability to simulate load on the car to map ECU's. These are also great dyno's, are very accurate, simulate load very well, and are repeatable every time. They are also inertia based dyno's where you'll drive the car up on the rollers, strap the car down, and make a 3rd or 4th gear pass.

These dyno's will always read ~12% LOWER than a Dynojet, which is our standard here in the states (unless the shop has messed with the gearing settings in the computer). Because of this, lots of the internet folk don't like to use them. They come on the internet, share their results and everyone says "why didn't you make more power with mod XX". So our theoretical car will show 88rwhp on the Mustang dyno.

3. Dynapack - These are the red headed step children here in the states. Not as common as the Dynojet or Dynapack, but these are the standard in Japan. These are fundamentally COMPLETELY different that the inertia type dyno's.

With the Dynapack (my favorite), you remove the rear wheels, attach the hubs of the car to the "pods", and make your pass.

The load is simulated on the car via a hydraulic pump. Because these are effectively inertia-less, they will read HIGHER than the standard Dynojet numbers by 8-10%. That number will vary depending on how "fast" your dyno run lasts (sweep time), but as a rule of thumb, they'll read ~8-10% higher. So with this dyno our car will now read ~109rwhp on average.