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      04-07-2015, 04:41 PM   #1
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BMW M4 F82 ECU Tuning by VR Tuned

We have another Project BMW M4 in the works here at Vivid Racing and this time it is here for our bench flash ECU Tune by VR Tuned. The car was donated to us for testing by Ricky out of Texas. Once the car was shipped here to our Gilbert, AZ facility, we cleaned her up and snapped some photos. Strapped down, we did a baseline dyno run. It is very important to point out our dyno settings and dyno type...

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http://blog.vividracing.com/vividrac...g-by-vr-tuned/





-RyanG
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      04-16-2015, 05:52 PM   #2
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The boys in the back put the car back on the Dyno, more stuff is in the works and it's gonna be even better? What?! Stay tuned.
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      06-02-2015, 11:59 AM   #3
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I'm sorry, it looks like we missed updating our thread with the news!

Our baseline line test gave us 377 all wheel horsepower and 385 ft/lbs of torque. The torque was pretty flat from 3000 rpm to 5300 rpm. It immediately started dropping at 3900 rpm and then really fell on its face at 5800 rpm. A 3rd gear pull had us doing about 90mph at 7300rpm. So in real world driving, the 0-60 definitely suffers. With the ECU flash, our torque rolled in similar to stock but at 3300rpm it rocketed up to 440 ft/lbs at the wheels. This peak at 3940rpm was about 60 ft/lbs gain. The torque continued to increase over stock until about 6300rpm where it met the stock numbers. Even through the higher rpm of 5380 to 6000, we are still gaining about 10-20 ft/lbs over stock. For horsepower, the gains are instantly realized at about 3100rpm. The 2 graphs show us Sport Mode (closer dotted line) and Comfort Mode (further apart dotted line). Like most new turbocharged vehicles, sport mode gives us faster throttle response and a increase in boost where the top end will taper off. With Sport Mode, we gained about 50 wheel horsepower at 4400rpm and kept a nice 20-30hp through the beginning and end of the curve compared to stock. The airflow factor came into play at around 6500rpm. In addition to the ECU Flash, we also tested our new Agency Power catless downpipes compared to the high flow cat we did on the other BMW M4 here. This will show us if the drop in power is caused by airflow or exhaust restriction.

The Agency Power downpipes are all stainless steel, TIG welded and feature a CNC machined flange all made here at our Arizona facility. Since these downpipes are catless, we did a stage 2 ECU flash to account for a cat delete to not throw a CEL. Typically on turbocharged cars, you see downpipes add 20hp by reducing the restriction caused by factory downpipes. The turbos like to breathe and these help that. Similar to what we have done on other N54 BMW cars, the N55 F82 downpipes feature smooth bends and larger diameter piping. With less restriction comes a louder more rasping tone similar to the previous E90 V8 as heard here. So will they make a impact to the M4 on the dyno? The downpipes made the torque increase right away. Having the torque jump from a stock 385 to a tuned and downpipe added 452 ft/lbs to the wheels. That is a 70ft/lb gain. The downpipes on their own added about a 20 peak torque gain and averaged about 10 ft/lbs from 4000rpm to the end of the test at about 7300rpm. Horsepower had nearly the same curve as just the VR Tuned upgrade did. It gained a consistant 10 wheel horsepower to about 5000 rpm where the downpipes helped out on the top. The top so an increase of about 15-20 awhp all the way to the end of the test.











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      06-09-2015, 07:26 PM   #4
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Another M4 on deck for tuning and a dyno, who's gonna be up next?
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      06-11-2015, 05:51 AM   #5
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Nice send me one to try out in Florida 😎😎😎🌴🌴🌴
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      06-11-2015, 03:24 PM   #6
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Quote:
Originally Posted by mcjoe691 View Post
Nice send me one to try out in Florida 😎😎😎🌴🌴🌴
Holy McJoe! We can definitely get you taken care of, just let me know when you're ready
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      07-20-2015, 06:25 PM   #7
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Tuning sale all month long!!!
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      07-21-2015, 07:09 AM   #8
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Looks good! Sounds good!
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      07-21-2015, 08:28 AM   #9
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Looks good. Is it required to send the car in for dyno tuning or are you just loading a base flash that could be done by just shipping ECU? Are you actually tweaking cars on the dyno or the same for all?
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      07-21-2015, 12:47 PM   #10
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Quote:
Originally Posted by dmk08 View Post
Looks good. Is it required to send the car in for dyno tuning or are you just loading a base flash that could be done by just shipping ECU? Are you actually tweaking cars on the dyno or the same for all?
On the stage 2 ECU flash this is a custom catered tune made to your specs to optimize the gains of your modifications as well as eliminate any CEL issues
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