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We were able to get our new C63 strapped down today for a little tuning. Our development car is all stock with around 800 miles on the clock, base model, $68,000 sticker price. Fuel during testing was 91 with a couple gallons of E85 mixed in. We think these results will be repeatable on good quality 93 octane fuel but will retest in the future. Temps in the 70s.
The cliff notes:
1) Stock performed better than expected at 465whp / 490wtq, stock boost was ~9.5psi under these testing conditions.
2) Using the JB4 we raised boost up to 15.5psi peak but kept a nice taper up top to keep things safe. Power jumped up to 537whp / 597wtq.
3) We previously determined that the factory intake is a major restriction so we installed a prototype BMS intake system with the car on the dyno and the reduced restriction allowed it to hit 561whp.
4) We ended up dialing back torque a bit in the end to smooth out the power delivery but there is plenty on tap. This platform can probably break 700wtq if you really want it to.
5) With all the torque on the road we've set the JB4 to limit boost in 1st and 2nd gear for improved traction. It's a nice JB4 user adjustable option there for you when you need it.
Also worth mentioning the JB4 is different animal than all of the other C63 tuning boxes currently available for the platform. Offering CANbus, fuel control, wireless logging to your smart phone, and a lot more to be discussed later. We're just getting started here.
I'm actually surprised to hear the factory box is the weakest link... I don't think any of the intakes yet have shown any real world data that their intakes make any extra horsepower, despite widespread claims that the airflow in the stock airbox is less-than-desired.
And... Is your "prototype air box" the trusty 'ol DCI? 😂😂😂😂
Very exciting news! Add me to the list as well, as a JB N54 customer from 2007.
Some folks may owe that C43 guy an apology. I admit that I was somewhat harsh in a post or two, but that was directly due to your admin handling my question on development of a product for the C63 in a ridiculous and disappointing way. Anyway, glad to know the good news!
Being new to this... is this a piggyback being developed or a bench tune? And will it work with the high flow cats I have on the way if it's a piggyback? I spoke with Dinan and their piggyback isn't recommended with aftermarket cats due to air/fuel/boost differences.
Sign me up.... How much will the intakes be? Will they ever be for sale? If not, when will the JB4 be released/any idea on pricing yet? I have a 2017 C63 that I'd love to JB4.
Some folks may owe that C43 guy an apology. I admit that I was somewhat harsh in a post or two, but that was directly due to your admin handling my question on development of a product for the C63 in a ridiculous and disappointing way. Anyway, glad to know the good news!
Being new to this... is this a piggyback being developed or a bench tune? And will it work with the high flow cats I have on the way if it's a piggyback? I spoke with Dinan and their piggyback isn't recommended with aftermarket cats due to air/fuel/boost differences.
Piggyback.
Yes it works very well with DP's 😂 will also tune out the CEL
Dinan has never made tunes for DP's because it's not emissions legal for street cars and they sell through dealerships.
And yeah, so many owe an apologize to that c43 guy that was talking rumours about this coming up. Some forum members think they know better because they have a bigger engine... 😂😂
Last edited by lovepower1; Sep 19, 2018 at 01:40 PM.
Thanks everyone for your interest! We'll be sharing more logs and details as development progresses and we get closer to release. We are targeting intro pricing around $899 for the JB4 unit but don't have any specific details yet to share on the intake pricing. Expect some more videos and information coming out in the next few weeks. Keep an eye on this thread for updates!
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