Torque curve plot for a 2011 Mustang V6 - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 02-26-2011 Thread Starter
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Torque curve plot for a 2011 Mustang V6

Does anyone have a full (1500 rpm to redline) torque curve plot of a stock 2011 V6?
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post #2 of 8 (permalink) Old 02-26-2011
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You would have to find an engine dyno chart for it to go that low in the rpm range. All the chassis dyno runs you will see start in the 2500-3000 range.
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post #3 of 8 (permalink) Old 02-26-2011
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Originally Posted by kolbbmw View Post
Does anyone have a full (1500 rpm to redline) torque curve plot of a stock 2011 V6?
The graph below is a Steeda Dyno chart for the 2011 V6. The Blue line is stock and the Red line is with the Steeda CAI and a tune. It doesn't go to 1500 RPM but it does go down to 2000. The original post is at:
2011 V6 Cold Air & Tuner Combo From Steeda - The Mustang Source - Ford Mustang Forums


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post #4 of 8 (permalink) Old 02-26-2011
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Question curve

can you explain please the relationship between the figures shown on the dyno at the rear wheel and what this translates to HP at the flywheel. My stock 3.7 is 305? with the package shown what tis the new HP figure?
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post #5 of 8 (permalink) Old 02-26-2011
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Originally Posted by Drednaught View Post
can you explain please the relationship between the figures shown on the dyno at the rear wheel and what this translates to HP at the flywheel. My stock 3.7 is 305? with the package shown what tis the new HP figure?
The relationship between the numbers on the graph and the 305 HP rating for the 2011 V6 Mustang are "approximate." The 305 HP number is measured at the flywheel of the engine. The numbers shown on the previous chart are measured at the rear wheels of the car. Because they are measured at the rear wheels, you have to "subtract power" that is used to turn the transmission/drive-shaft/differential/wheels. A "rough estimate" used by some people for that loss is about 15%. That is 15% of the 305 HP would be lost getting to the wheels - depends on manual/automatic transmission, tire hook-up with the dyno etc. If you use 15% that says you would measure about 259 HP at the rear wheels. If you look at the lowest blue line, and trace it to the top, it is showing "approximately 260" at its peak end. That is the rough comparison to your 305HP flywheel number. The other blue line shows the torque in Ft-Lbs. The red lines show the change with the addition of the Steeda cold air intake and a new engine tune.


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post #6 of 8 (permalink) Old 02-26-2011
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hp

nice, thanks for that
What do you think is the flywheel hp after the mods? 340?
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post #7 of 8 (permalink) Old 02-26-2011
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Originally Posted by Drednaught View Post
nice, thanks for that
What do you think is the flywheel hp after the mods? 340?
If I was forced to pick a number for the flywheel HP with the CAI and the tune I would probably say 325 HP. If you subtract 15% - which probably isn't accurate - from the 325 you would get about 275 - which is about what the chart shows. The problem with all of these numbers is that the probable "repeatability" of any "normal" Dyno setup is probably no better then 5%. When you start looking at a single run and comparing things that are 10HP apart, you are probably in the noise of the measurement capability. A pretty good summary on Dyno measurements/accuracy/repeatability and "fudging" is the link below from Hot Rod Magazine:
Chassis Dyno Guide - Testing Accuracy - Hot Rod Magazine

Page 3 talks about the "repeatability" of measurements on most "average" Dyno setups. Dyno numbers can have a lot more "precision" the accuracy

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post #8 of 8 (permalink) Old 02-28-2011
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Quote:
Originally Posted by Radioguy View Post
If I was forced to pick a number for the flywheel HP with the CAI and the tune I would probably say 325 HP. If you subtract 15% - which probably isn't accurate - from the 325 you would get about 275 - which is about what the chart shows. The problem with all of these numbers is that the probable "repeatability" of any "normal" Dyno setup is probably no better then 5%. When you start looking at a single run and comparing things that are 10HP apart, you are probably in the noise of the measurement capability. A pretty good summary on Dyno measurements/accuracy/repeatability and "fudging" is the link below from Hot Rod Magazine:
Chassis Dyno Guide - Testing Accuracy - Hot Rod Magazine

Page 3 talks about the "repeatability" of measurements on most "average" Dyno setups. Dyno numbers can have a lot more "precision" the accuracy
Thanks for that link, I was looking for this article a few days ago..
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