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Terry @ BMS's Avatar
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Default JB4 for Alfa Romeo Giulia Quadrifoglio QV - 05-31-2019, 04:48 PM

Little good news for QV faithful. We picked up a 2018 Alfa Quadrifoglio and are knee deep in to JB4 development for it. We already have CANbus and basic boost control up and running. Can't wait to get this thing on the dyno and see what we can do!


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Default 05-31-2019, 04:54 PM

Was able to hit the dyno today for a little baseline testing. Car is all stock with around 1000 miles on it, running on 91 octane with a few gallons of E85 added in for good measure.

Did all runs in 5th gear and wasn't able to find a good way to avoid the downshift without just flooring it slowly preventing valid readings below around 3500rpm. Kickdown hasn't been an issue on the road so maybe just a dyno headache. Despite that got some great baseline runs and was able to play around a little with the early JB4 tuning.

Also not 100% if the boost calibration in the JB4 logging software is accurate yet. Working on confirming that. It's in the ballpark though.

Best stock run was 456whp and 448wtq at around 22psi peak and the best tuned run was 501whp and 506wtq at around 25psi peak. In areas of the curve gains were 60whp+ so overall quite a big power jump for the modest boost increase. Which is good news for tuning!

Next step will be to take over wastegate control with the JB4 so we can push boost a little higher and see what this 2.9L can really do.
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Burger Motorsports
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Default 06-03-2019, 09:56 AM

Looking good, Terry!


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

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Default 08-08-2019, 09:46 AM

Good stuff! Keep up posted.

What kind of power are you expecting all said and done?


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Default 08-08-2019, 05:29 PM

Too early to tell but I think 550whp should be doable stock turbos!


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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