W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Dyno Results after RENNtech Pulley/ECU...

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Old Jun 10, 2006 | 06:43 PM
  #1  
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Dyno Results after RENNtech Pulley/ECU...

456.28 and 505.70, dyno graph here:

http://www.dragtimes.com/Mercedes-Be...slip-8995.html

RENNtech needs to reflash my ecu with a newer program, waiting to get my recalls done first....
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Old Jun 10, 2006 | 07:07 PM
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Originally Posted by Fikse
456.28 and 505.70, dyno graph here:

http://www.dragtimes.com/Mercedes-Be...slip-8995.html

RENNtech needs to reflash my ecu with a newer program, waiting to get my recalls done first....
Those are strong numbers Fikse.
I think it's time for a track rental.
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Old Jun 10, 2006 | 07:09 PM
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Jesus, 505 rwtq with just Renntech pulley and ECU and nothing else?
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Old Jun 10, 2006 | 10:54 PM
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Fiske, what were the numbers on that dyno before the mods?
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Old Jun 11, 2006 | 03:54 AM
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Those are indeed strong numbers. I'm pulling 480rwhp and 549 rwtq with pulley, ecu, headers, and IC mod. I thought those were strong numbers. You throw on headers (deleting your primary cat) and an IC/mod and you'll top those numbers very easily... Congrats on a very strong E55
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Old Jun 11, 2006 | 08:48 AM
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very nice.... do you have the dyno sheet to post? I'm starting a collection of them....

Derek, my car made 419 stock, but different dyno, it was the Viper club's dyno day.... temp at the dyno yesterday was 91 degrees, 28% humidity.... not sure if that matters.....

BTW, my car made more power/torque than quite a few Vipers there....




Originally Posted by dragonAMG
Those are indeed strong numbers. I'm pulling 480rwhp and 549 rwtq with pulley, ecu, headers, and IC mod. I thought those were strong numbers. You throw on headers (deleting your primary cat) and an IC/mod and you'll top those numbers very easily... Congrats on a very strong E55
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Old Jun 11, 2006 | 01:22 PM
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Wow. I am going to heavily consider Renntech now.
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Old Jun 11, 2006 | 01:58 PM
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great numbers...now use em
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Old Jun 11, 2006 | 03:46 PM
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Originally Posted by Fikse
Derek, my car made 419 stock, but different dyno, it was the Viper club's dyno day.... temp at the dyno yesterday was 91 degrees, 28% humidity.... not sure if that matters.....
According to your dyno output, your results were corrected to STD numbers, which will produce the highest corrected output. IIRC, STD corrects to 60 degrees F, 29.92 barometric pressure, and 0 % humidity. STD results are about 3-4 % higher than more recent standards, which correct to more real-world conditions.
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Old Jun 11, 2006 | 04:46 PM
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I think the SAE numbers were about 10hp/10tq less.....
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Old Jun 11, 2006 | 06:01 PM
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Originally Posted by Fikse
I think the SAE numbers were about 10hp/10tq less.....
Yeah, that's not too bad - a little over 2%. Now the question becomes which SAE standard was used? I did a quick Google and found this summary of correction standards:

Originally Posted by http://www.land-and-sea.com/dyno-tech-talk/corrected-horsepower.htm
The most common are the SAE standards. The older J607 standard considers that the engine was run on a 60°F day with 0% humidity and a barometric pressure of 29.92 in-Hg or the newer SAE J1349 standard of 77°F (25°C) day with 0% humidity and a barometric pressure of 29.234 in-Hg (99 KPa). Also the ECE standard is the same as the SAE J1349, but does not use mechanical efficiency in the calculations. The DIN standard which corrects to 68°F (20° C) day with 0% humidity and a barometric pressure of 29.92 in-Hg (101.3 KPa) and the JIS standard corrects 77°F (25° C) day with 0% humidity and a barometric pressure of 29.234 in-Hg (99 KPa), but uses different correction curves than the others (as a substitution for using mechanical efficiency factors). Further, we have the J1995 corrects 77°F (25° C) day with 0% humidity and a barometric pressure of 29.53 in-Hg (100 KPa).
Wouldn't it be nice if life were easy and there was only one standard . . .
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Old Jun 11, 2006 | 07:17 PM
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it would, I used what ever was used for my original dyno..... it's dynojet's software, and they have all of those correction factors available... I would say the latter SAE standard, since the JIS factor is within 1HP....

odd that the totally uncorrected numbers are within 2HP/TQ of the SAE numbers, and it was really hot and humid....

thanks for the notes on the factors....


Originally Posted by Grumpy666
Yeah, that's not too bad - a little over 2%. Now the question becomes which SAE standard was used? I did a quick Google and found this summary of correction standards:


Wouldn't it be nice if life were easy and there was only one standard . . .

Last edited by Fikse; Jun 11, 2006 at 07:21 PM.
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Old Jun 11, 2006 | 07:59 PM
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Originally Posted by Fikse
odd that the totally uncorrected numbers are within 2HP/TQ of the SAE numbers, and it was really hot and humid....
Based on the SAE formula, that suggests that the barometric pressure that day was higher than the value used in the formula (92.234 in-hg). Do you know?
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Old Jun 12, 2006 | 02:13 AM
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Toulene would smoothen out those graphs dramatically, u should give it a try
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