ECU Remapped Dyno
08-12-2008, 06:26 PM
#51
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Originally Posted by brabusw209amg' post='645322' date='Aug 12 2008, 07:09 PM
can some u of guys MOVE to NY??? I dont see any NY places that does ECU remaps. *Sigh* why does all the car stuff have to be in the west coast?
TRUST ME it's worth it.
04-11-2009, 04:09 PM
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Originally Posted by markke' post='568644' date='Apr 26 2008, 10:03 AM
Something seems odd here -- doesn't it?
These dyno charts reflect maximum horsepower and torque gains at the lower end of the power spectrum. The increased HP and torque gains appear to come at the expense of decreasing HP and torgue as you increase engine revolutions, which would (as it seems to me) cause the shift points to occur earlier on to cause the engine to continue to be placed into 'pulling mode' (continued increase in HP and torque).
I'm certainly no engine or dyno expert, but it seems to me that while these gains may look good on paper, they may not reflect the most optimum way to tune an engine for street performance. In other words -- HP and torque are up -- but do you really want them <emphasis>this way</emphasis>?
The dyno charts reflect peak (post remap) at around 3800rpm for torque and 4000rpm for HP. These values then start to decline to meet stock HP and torque figures that originally were recorded (pre remap) at approximately 5500rpm. Hence, a decline in HP and torque is realized as the engine is pushed further to its maximum capability.
As I understand it, most well-tuned engines are designed to realize max HP and torque at the higher end of the power spectrum (thus the increasing slope nature of the curves). As I read these charts, I draw a conclusion that while HP and torque may have been increased, they were increased at lower rpms causing the engine to realize negative power efficiency. In other words, when the engine is working harder (increased rpm), the output is decreasing from 3800/4000 through 6500 rpm (resulting in a negative slope). Isn't this a sign of inefficiency and decreased optimization?
As I read them, there's actually an inverted nature to the two slopes.
What am I missing here? I welcome my statements above to be challenged.
These dyno charts reflect maximum horsepower and torque gains at the lower end of the power spectrum. The increased HP and torque gains appear to come at the expense of decreasing HP and torgue as you increase engine revolutions, which would (as it seems to me) cause the shift points to occur earlier on to cause the engine to continue to be placed into 'pulling mode' (continued increase in HP and torque).
I'm certainly no engine or dyno expert, but it seems to me that while these gains may look good on paper, they may not reflect the most optimum way to tune an engine for street performance. In other words -- HP and torque are up -- but do you really want them <emphasis>this way</emphasis>?
The dyno charts reflect peak (post remap) at around 3800rpm for torque and 4000rpm for HP. These values then start to decline to meet stock HP and torque figures that originally were recorded (pre remap) at approximately 5500rpm. Hence, a decline in HP and torque is realized as the engine is pushed further to its maximum capability.
As I understand it, most well-tuned engines are designed to realize max HP and torque at the higher end of the power spectrum (thus the increasing slope nature of the curves). As I read these charts, I draw a conclusion that while HP and torque may have been increased, they were increased at lower rpms causing the engine to realize negative power efficiency. In other words, when the engine is working harder (increased rpm), the output is decreasing from 3800/4000 through 6500 rpm (resulting in a negative slope). Isn't this a sign of inefficiency and decreased optimization?
As I read them, there's actually an inverted nature to the two slopes.
What am I missing here? I welcome my statements above to be challenged.
04-11-2009, 05:55 PM
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Originally Posted by dbpack' post='844382' date='Apr 11 2009, 06:41 PM
So, is there a difference between this remap and the powerchip remap being offered with the RPI scoops? Also, what's the cost of this?
Any numbers/dynos for 530i's?
Any numbers/dynos for 530i's?
PM members trinity autosport for more details...
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