How do I set the car up for a Dyno run?

[Ilikemike]

I have a DCT and know to turn off stability control, anything else to consider about the car's setup? This will be a baseline run before testing the effect of modifications.

[horsepower_and_hounds]

Originally Posted by Ilikemike

I have a DCT and know to turn off stability control, anything else to consider about the car's setup? This will be a baseline run before testing the effect of modifications.

Turn traction control off, put it in sport +, switch it to manual shift mode, 5th is 1:1 ratio....many run it in 4th for some reason, WOT...stomp it to the floor. The tire pressure will be set by the dyno team

[VF-Engineering]

Originally Posted by ehagerty

Turn traction control off, put it in sport +, switch it to manual shift mode, 5th is 1:1 ratio....many run it in 4th for some reason, WOT...stomp it to the floor. The tire pressure will be set by the dyno team

Don't "stomp it to the floor", as you may inadvertently hit the "kick down" function.
It's better to roll onto throttle moderately and you'll still be at WOT before you get
to even 2,500RPM.

If you're measuring for delta (before and after gains) the difference between 4th
and 5th gear is almost negligible.

5th gear is indeed 1:1 so it will produce slightly higher peak numbers.
The reason many people dyno in 4th gear (us included) is because the runs are
shorter and the wheel speeds are more reasonable. We test and tune in both gears,
and our advertised gains are always in 4th gear since the focal point should be delta
and not solely peak numbers.

[horsepower_and_hounds]

Originally Posted by VF-Engineering

Don't "stomp it to the floor", as you may inadvertently hit the "kick down" function.
It's better to roll onto throttle moderately and you'll still be at WOT before you get
to even 2,500RPM.

If you're measuring for delta (before and after gains) the difference between 4th
and 5th gear is almost negligible.

5th gear is indeed 1:1 so it will produce slightly higher peak numbers.
The reason many people dyno in 4th gear (us included) is because the runs are
shorter and the wheel speeds are more reasonable. We test and tune in both gears,
and our advertised gains are always in 4th gear since the focal point should be delta
and not solely peak numbers.

Nice...nobody has ever explained that to me. As for the "stomp" I didn't mean literly but if your in manual mode the DCT does not kick down

[Ilikemike]

Originally Posted by VF-Engineering

Don't "stomp it to the floor", as you may inadvertently hit the "kick down" function.
It's better to roll onto throttle moderately and you'll still be at WOT before you get
to even 2,500RPM.

If you're measuring for delta (before and after gains) the difference between 4th
and 5th gear is almost negligible.

5th gear is indeed 1:1 so it will produce slightly higher peak numbers.
The reason many people dyno in 4th gear (us included) is because the runs are
shorter and the wheel speeds are more reasonable. We test and tune in both gears,
and our advertised gains are always in 4th gear since the focal point should be delta
and not solely peak numbers.

Thanks to both of you. In the DCT car will not start off in 5th gear, so I guess you have to run it up through the gears to fifth then hit the gas?

[Sleeper]

Originally Posted by Ilikemike

Thanks to both of you. In the DCT car will not start off in 5th gear, so I guess you have to run it up through the gears to fifth then hit the gas?

Come on, man. If you're in a MT car, you're not starting in 5th gear either. Regardless of transmission, you're running through the gears to 4th or 5th.

If it's a reputable shop, you won't personally be running the car on the dyno - the dyno operator will. Aside from knowing to have DSC completely off and the car in "S" or manual-mode, that's all you need to know.

Post up your graphs once you've completed your pulls.

[Ilikemike]

Originally Posted by Sleeper

Come on, man. If you're in a MT car, you're not starting in 5th gear either. Regardless of transmission, you're running through the gears to 4th or 5th.

If it's a reputable shop, you won't personally be running the car on the dyno - the dyno operator will. Aside from knowing to have DSC completely off and the car in "S" or manual-mode, that's all you need to know.

Post up your graphs once you've completed your pulls.

Will do. BTW I've seen tv shows where the car (on a strip, 5th Gear or Top Gear I think) starts in final gear and runs all the way to top speed... I just wondered if that was the case with the M's and if that was how it was done, my first experience with this.... You're right, the techs will walk me through it..

[1FastS4]

Originally Posted by Ilikemike

Thanks to both of you. In the DCT car will not start off in 5th gear, so I guess you have to run it up through the gears to fifth then hit the gas?

Of course. I don't think anyone assumed you dyno a car from a complete stop at 0-MPH. You run through the gears until you get to 4th or 5th gear and then you let the car settle to the lowest possible RPM in that gear before you start your run.

This is from VF's YouTube channel

Not a BMW, but this one is pretty cool too!

[Ilikemike]

Or, in retrospect, perhaps it was from 30mph or so....

[Ilikemike]

Originally Posted by 1FastS4

Of course. I don't think anyone assumed you dyno a car from a complete stop at 0-MPH. You run through the gears until you get to 4th or 5th gear and then you let the car settle to the lowest possible RPM in that gear before you start your run.

This is from VF's YouTube channel

Not a BMW, but this one is pretty cool too!

Hey, thanks for the video!

[VF-Engineering]

Originally Posted by Ilikemike

Hey, thanks for the video!

Shameless Plug ...

If you like those, you should check out our Instagram!

We are first and foremost an engineering and development company, so
our 2WD and 4WD dynos are running on a daily basis for development
and testing.

[s2k750]

What gear for manual? I've been logging in 3rd on the street.

[FSociety]

Originally Posted by s2k750

What gear for manual? I've been logging in 3rd on the street.

Logging usually recommended 3rd gear 30mph-100mph (going thru 3-5th gear)

[mike@x-ph.com]

Im curious to know if the shop is asking you to manually setup the dyno for the car

[Ilikemike]

Originally Posted by mike@x-ph.com

Im curious to know if the shop is asking you to manually setup the dyno for the car

No, just my first time doing a Dyno run and unsure about the process and wanting it to be 'right.' I understand the 'operator' will be well versed on what they do..... Interestingly, there are different opinions on what gear to do the pulls, 4th or 5th, something that relates to the output data and my purpose for the pulls..... Also, corrections to the data are another issue to consider, the Dyno is a mustang, and usually the shop corrects the data to allow comparisons to dynojet (I think) values, I may not want to do that.... In any case, rather than just being passive, I wanted to understand a little more about the process, cheers!
PS I hope your question was directed to me lol

[mike@x-ph.com]

Originally Posted by Ilikemike

No, just my first time doing a Dyno run and unsure about the process and wanting it to be 'right.' I understand the 'operator' will be well versed on what they do..... Interestingly, there are different opinions on what gear to do the pulls, 4th or 5th, something that relates to the output data and my purpose for the pulls..... Also, corrections to the data are another issue to consider, the Dyno is a mustang, and usually the shop corrects the data to allow comparisons to dynojet (I think) values, I may not want to do that.... In any case, rather than just being passive, I wanted to understand a little more about the process, cheers!
PS I hope your question was directed to me lol

haha yes it was directed to you

[mhjeep]

How do you "trick" the car into thinking the hood is closed even when it isn't?

[Ilikemike]

Originally Posted by mhjeep

How do you "trick" the car into thinking the hood is closed even when it isn't?

Good Question! Anyone???

[jandref321]

Tape over the sensor

[cryptz]

sorry to resurrect this thread, but i do see there is a dyno mode for our cars

just curious, after you do a pull, in a dct do you just let off the throttle and allow the engine to brake, or do you put the car into neutral?

[drgmt]

Originally Posted by Ilikemike

No, just my first time doing a Dyno run and unsure about the process and wanting it to be 'right.' I understand the 'operator' will be well versed on what they do..... Interestingly, there are different opinions on what gear to do the pulls, 4th or 5th, something that relates to the output data and my purpose for the pulls..... Also, corrections to the data are another issue to consider, the Dyno is a mustang, and usually the shop corrects the data to allow comparisons to dynojet (I think) values, I may not want to do that.... In any case, rather than just being passive, I wanted to understand a little more about the process, cheers!
PS I hope your question was directed to me lol

If you are measuring the delta or the effect of mods, then the stock car acts as an internal control and no corrections are needed. There are to many variables between machines etc to make comparisons to other dynos accurate.

Bottom line run stock and then look at the change with mod under the same conditions on the same dyno with the same operator.

[Tommix]

After dyno, how will I go back to "normal" mode? Does it go automatically after turn off the car or do I have to do something else?

cheers