Dyno Day

[stormtrooper]

Finally got to dyno my car to see where it was. I was expecting what it out down. But deff not the torque numbers. I think those read wrong. I'm thinking it's should be around 430ish. Still working on the fine tuning though. Mods are on the video.

Hers the video of the 3 pulls.


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[arghx7]

A few comments:

1. The scaling of the graph is hard to read. Whoever made the chart needed to zoom in more. Sometimes weird scaling is just a default the operator didn't bother to change; sometimes shops will intentionally set up the chart a certain way to make the power and torque band look better.

I'm not sure what kind of dyno that is, but often you can ask the operator to give you the run files and you can download the software yourself to play around with the chart. Dynojets are especially easy.

2. Those numbers have correction factors applied. So your car didn't make 367 horsepower and 460 lb/ft on the first dyno pull. It made 346 hp and 433 lb/ft of torque. Take the number reported and then divide by the correction factor displayed, in that case 1.06.

3. Your ambient temperature is 34F, much lower than standard conditions, which are 77F/25C . That makes your intercooler work better and helps make power and torque. Your ambient pressure is a bit lower (29 in Hg/98 kPa) than standard conditions, which is 29.5 in Hg/99 kPa. That does make the turbo work slightly harder than at standard conditions.

4. The correction factor is sort of like the answer to a philosophical question: "What if the engine were run in a lab which could set the temperature and barometric pressure to a standard set of conditions?" with the standard set of conditions being 25C and 99 kPa as mentioned above. It's more complicated with a boosted engine than an n/a one, because boosted engines are much more sensitive to temperature and pressure. A lot of people argue that correction factors should be ignored altogether on boosted engines.

Next see how the car does in a 1/4 mile run.

 

[04SloSnake]

His car runs alright at the track. It is definitely making good power.

 

[Edkiefer]

Be good to mention what modes are done to the vehicle .

 

[AngelOreo]

Be good to mention what modes are done to the vehicle .

^^^ This Please.

 

[AngelOreo]

I'm not sure what kind of dyno that is, but often you can ask the operator to give you the run files and you can download the software yourself to play around with the chart. Dynojets are especially easy.

This is true. My guy did this for me and it is nice being able to tweak the settings and correction factors etc. This will also allow you to overlay additional pulls as you do them assuming you ask for the files. Just bring a thumb drive with you.

 

[bluestang50]

Be good to mention what modes are done to the vehicle .

^^^ This Please.

.

Mods are on the video.

 

[MAPerformance]

A few comments:

1. The scaling of the graph is hard to read. Whoever made the chart needed to zoom in more. Sometimes weird scaling is just a default the operator didn't bother to change; sometimes shops will intentionally set up the chart a certain way to make the power and torque band look better.

I'm not sure what kind of dyno that is, but often you can ask the operator to give you the run files and you can download the software yourself to play around with the chart. Dynojets are especially easy.

2. Those numbers have correction factors applied. So your car didn't make 367 horsepower and 460 lb/ft on the first dyno pull. It made 346 hp and 433 lb/ft of torque. Take the number reported and then divide by the correction factor displayed, in that case 1.06.

3. Your ambient temperature is 34F, much lower than standard conditions, which are 77F/25C . That makes your intercooler work better and helps make power and torque. Your ambient pressure is a bit lower (29 in Hg/98 kPa) than standard conditions, which is 29.5 in Hg/99 kPa. That does make the turbo work slightly harder than at standard conditions.

4. The correction factor is sort of like the answer to a philosophical question: "What if the engine were run in a lab which could set the temperature and barometric pressure to a standard set of conditions?" with the standard set of conditions being 25C and 99 kPa as mentioned above. It's more complicated with a boosted engine than an n/a one, because boosted engines are much more sensitive to temperature and pressure. A lot of people argue that correction factors should be ignored altogether on boosted engines.

Next see how the car does in a 1/4 mile run.

Where do you see an ambient temperature of 34°F? He is in Texas, it was about 80° out.

Pretty sure this was on a dynocom dyno, which are great, but they do the graphing odd.

With his modifications and from what I see on his datalogs he should be making around 355whp/420wtq.

 

[arghx7]

good catch, I got the temperature and the humidity mixed up. so 80F, 34% humidity

 

[stormtrooper]

It was just a shop having a dyno day. Soo probably nothing was messed with. Suppose to take it to another dynacom dyno where its setup like it's suppose and gonna see what it makes.

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[stormtrooper]

Also, i said the mods are listed in the video

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