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ECU Remapped Dyno

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Old Jan 24, 2008 | 11:07 AM
  #11  
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68 more HP to until you can reach the Rated HP of 325.
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Old Jan 24, 2008 | 11:13 AM
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Originally Posted by 525iEnjoy' post='522358' date='Jan 24 2008, 12:07 PM
68 more HP to until you can reach the Rated HP of 325.
Shoot 325rwhp will put him at over 400 crank hp. Anyway, I'm sure you read r1racer's dyno chart incorrectly; 257 is to the rear wheel.
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Old Jan 24, 2008 | 11:19 AM
  #13  
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That's great to see dyno proven gains and a good number too!

But I'm wondering why the numbers are still so low? Even if you use a DT loss of 20%, you're still shy of the factory claimed 325 crank hp. I know Dyno Dynamics are more conservative dynos but it's weird to see it go below the factory crank numbers.
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Old Jan 24, 2008 | 11:25 AM
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Originally Posted by 525iEnjoy' post='522358
That's great to see dyno proven gains and a good number too!

But I'm wondering why the numbers are still so low? Even if you use a DT loss of 20%, you're still shy of the factory claimed 325 crank hp. I know Dyno Dynamics are more conservative dynos but it's weird to see it go below the factory crank numbers.
Thank you!

That is why I posted two dyno's....the first is with dyno dynamics and the second is with dynojet. The Dynojet numbers are with STOCK EVERYTHING too. Yes the numbers read low, but I wanted to see how much the ECU remap actually gained.
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Old Jan 24, 2008 | 12:45 PM
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Originally Posted by vegastrashed' post='522360' date='Jan 24 2008, 12:13 PM
Shoot 325rwhp will put him at over 400 crank hp. Anyway, I'm sure you read r1racer's dyno chart incorrectly; 257 is to the rear wheel.
Yes. I was saying he's 68 away from having the rated at the wheels. 68rwhp+257rwhp=325rwhp. I read it correctly. 400 crank should be close to get too with full exhaust and CAI
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Old Jan 24, 2008 | 12:49 PM
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Originally Posted by 525iEnjoy' post='522358' date='Jan 24 2008, 12:07 PM
68 more HP to until you can reach the Rated HP of 325.
The 325 rating is crank for the 545i. You read his 257rwhp as crank. Why would you say 68 more then? Educate me.
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Old Jan 24, 2008 | 01:09 PM
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I'm surprised that the HP is kind of low before the ECU remap.

The 545i is rated at 325HP at the crank, subtract %20 loss (65HP) is 260 rwhp

243.8 rwhp (before) is a bit low

257.9 rwhp (after) sounds about right.

Am I missing something?
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Old Jan 24, 2008 | 02:48 PM
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Originally Posted by zen68' post='522432' date='Jan 24 2008, 02:09 PM
I'm surprised that the HP is kind of low before the ECU remap.

The 545i is rated at 325HP at the crank, subtract %20 loss (65HP) is 260 rwhp

243.8 rwhp (before) is a bit low

257.9 rwhp (after) sounds about right.

Am I missing something?

Yes the numbers are low, BUT please keep in mind its a Dyno Dynamics...if you see the other dyno sheet its a Dynojet which made peak 271 whp crank is 325 so the loss is 16.62%

Does that kind of make sense?
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Old Jan 24, 2008 | 08:46 PM
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Originally Posted by r1racer' post='522467' date='Jan 24 2008, 03:48 PM
Yes the numbers are low, BUT please keep in mind its a Dyno Dynamics...if you see the other dyno sheet its a Dynojet which made peak 271 whp crank is 325 so the loss is 16.62%

Does that kind of make sense?

is there a ecu remap for the 645ci? what kinda cost is involved?
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Old Jan 25, 2008 | 12:25 AM
  #20  
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A load-based dyno typically reads about 13% lower than a dynojet. A load dyno won't give impressive numbers, but is best for tuning.

The actual numbers are not that important, but rather the delta and space under the curve.
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