[HT0307]

Here's my starting point for my n52.
All that's done so far is muffler and secondary cats delete.

Looking to do 3 Stage Intake and tune next.

[Rick328]

Both lines should cross at 5250 rpm. It seems something isn't correct on that reading. I would double check with the dyno shop if you want to have a good and true baseline.

[HT0307]

Originally Posted by Rick328

Both lines should cross at 5250 rpm. It seems something isn't correct on that reading. I would double check with the dyno shop if you want to have a good and true baseline.

Can you elaborate? I've never heard that before.

Wouldn't my exhaust work change that up some?

[Rick328]

Originally Posted by HT0307

Can you elaborate? I've never heard that before.

Wouldn't my exhaust work change that up some?

I'm no pro and I've never dynoed my car, but search a bit on google (or just in this NA forum section really): torque is calculated from a given rpm value and the formula result in both values always crossing at this specific rpm, no matter the engine. Exhaust doesn't matter.

[HT0307]

Originally Posted by Rick328

I'm no pro and I've never dynoed my car, but search a bit on google (or just in this NA forum section really): torque is calculated from a given rpm value and the formula result in both values always crossing at this specific rpm, no matter the engine. Exhaust doesn't matter.

Yeah a little research educated me on what you mean. I'm trying to look up what could alter that now.

[HT0307]

2007 328i Automatic

[Biginboca]

Originally Posted by HT0307

2007 328i Automatic

That’s too much power for the mods you have because you have an auto.... and like mentioned the lines not crossing around 5200rpm’s. Definitely can’t go by that printout.

[Terraphantm]

Originally Posted by Rick328

Both lines should cross at 5250 rpm. It seems something isn't correct on that reading. I would double check with the dyno shop if you want to have a good and true baseline.

Power and torque are scaled differently in that plot. They only cross at 5250 if using the same scale.

[Rick328]

Sorry, first time I see different scaling on the same dyno chart. Seemed off at first glance...

[HT0307]

Originally Posted by Biginboca

That’s too much power for the mods you have because you have an auto.... and like mentioned the lines not crossing around 5200rpm’s. Definitely can’t go by that printout.

So are you saying the Power and Torque are both wrong?

[HT0307]

We used 4th gear for the pulls if that matters. I was told it was 1:1.

[6ixSpd]

It's fine... Ignore the comments about it being incorrect. The scaling is different than a usual dyno. Nothing to be concerned about.

Good job establishing a baseline!

[HT0307]

It doesn't look like it is 1:1.

[Biginboca]

Originally Posted by HT0307

It doesn't look like it is 1:1.

So you could probably divide any point by 1.16 to get an accurate number at that point?

[cpie168]

Thanks for the post! Keep us posted after your other upgrades please!

[Terraphantm]

Originally Posted by Biginboca

So you could probably divide any point by 1.16 to get an accurate number at that point?

No, that's not how dynos work. The numbers are fine. People like to use 1:1 gears because in theory there's less drivetrain loss.

[CobraMarty]

It's always difficult when the hp and tq scale numbers are different.
I wish they were the same scale, then they would cross at 5252 rpm.

Your numbers are about right, 195 HP and 175 TQ.

[tlow98]

Pretty healthy numbers for an auto!

And thanks for the baseline data point.

[Rival]

Originally Posted by CobraMarty

It's always difficult when the hp and tq scale numbers are different.
I wish they were the same scale, then they would cross at 5252 rpm.

Your numbers are about right, 195 HP and 175 TQ.

right on point for a stock 328/auto

[HT0307]

[IMG]

[/IMG]

[desertman123]

Dynos are all so different it's just better to go off the HP/TQ delta rather than raw numbers