JB4 or RaceChip

Maximus_OM · 10-17-2023, 08:05 AM

Was looking at tuning my car but as my production date is late 2020 I may have a locked ECU. I will do some investigating but I have it locked I won’t be able to keep car off the road and send ECU to FEMTO.

So next option is a piggyback. I’ve done lots of research in here about JB4 and RC and there’s content…but no one’s actual opinion / review of running one for an X3MC.

I’ve watched lots of YouTube vids and it appears JB4 is more “customisable” but wanted to get peoples take on piggybacks

Oldgixxer · 10-17-2023, 08:48 AM

Been running the RC GTS for a year so far and loving the gains. I made a thread w pics,same day before/after gains on the dyno and Dragy info if you search. No info or opinion towards JB4 as I've never ran one. You'll hear varying positive/negative opinions on both,as well as piggybacks themselves.

mike@x-ph.com · 10-17-2023, 09:52 AM

Both will do the job and make the same power on a stock car.

The Jb4 takes 15 minutes longer to install but comes with many features and safety failsafes. You can use them or have the Jb4 run on the default settings.

Maximus_OM · 10-17-2023, 09:55 AM

I was thinking about running mid pipe and maybe a 200 cell sports cat so wondering if jb4 would be better with these hardware mods?

Also with both piggy backs are there maps where you can run lower octane fuel in case you cannot get high octane ? The fuel station near me regularly runs out of UK 99 RON (US 93) so sometimes need to use 95 RON (US 91)

strohw · 10-17-2023, 10:32 AM

Quote:

Originally Posted by Maximus_OM

I was thinking about running mid pipe and maybe a 200 cell sports cat so wondering if jb4 would be better with these hardware mods?

Also with both piggy backs are there maps where you can run lower octane fuel in case you cannot get high octane ? The fuel station near me regularly runs out of UK 99 RON (US 93) so sometimes need to use 95 RON (US 91)

The JB4 has multiple stock maps and for most vehicles is setup so Map 1 = 91 octane and Map 2 = 93 octane.

Stereolab42 · 10-17-2023, 02:57 PM

Been running the JB4 for weeks now, no issues (aside from the annoying install).

r33_RGSport · 10-17-2023, 10:45 PM

Here are a few threads regarding RaceChip's feedback.

https://x3.xbimmers.com/forums/showt...light=racechip

https://x3.xbimmers.com/forums/showt...light=racechip

https://x3.xbimmers.com/forums/showt...light=racechip

https://x3.xbimmers.com/forums/showt...light=racechip

Must_Go_FASTER · 10-18-2023, 10:48 AM

I can't speak to the performance of either on an S58 engine, but I have the JB4 for my B58. Really love the detail that they put into installation guides and customer service from BMS. I run E30 blends sometimes and I was able to log a few runs with the JB4 app and send them in. Was e-mailing back and forth with them for about a day and was able to easily change the settings to what they recommended. They asked for a few logs and verified everything was running smoothly.

Again, can't speak to what RC offers with logs and customer service, but BMS is great to work with. I have a feeling you'd be happy with either one! Those are some big gains from just a piggyback. Cheers!

10-17-2023, 08:05 AM	#1
Maximus_OM New Member 4 Rep 18 Posts Drives: X3M Competition Daytona Grey Join Date: Mar 2021 Location: Stratford upon avon iTrader: (0)	JB4 or RaceChip Was looking at tuning my car but as my production date is late 2020 I may have a locked ECU. I will do some investigating but I have it locked I won’t be able to keep car off the road and send ECU to FEMTO. So next option is a piggyback. I’ve done lots of research in here about JB4 and RC and there’s content…but no one’s actual opinion / review of running one for an X3MC. I’ve watched lots of YouTube vids and it appears JB4 is more “customisable” but wanted to get peoples take on piggybacks
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10-17-2023, 08:48 AM	#2
Oldgixxer Captain 1988 Rep 826 Posts Drives: nothing fast Join Date: Jan 2020 Location: The Lowcountry,SC iTrader: (0)	Been running the RC GTS for a year so far and loving the gains. I made a thread w pics,same day before/after gains on the dyno and Dragy info if you search. No info or opinion towards JB4 as I've never ran one. You'll hear varying positive/negative opinions on both,as well as piggybacks themselves. __________________ -'24 X5MC,'22 430i -'09 Busa,'05 GSXR-1K(GT28R turbo)'00 Busa(GT3582) Gone but not forgotten: -'22 X3MC,'20 M550i,'18 X2,F30 328xi,'07 E63 AMG (1st W211 63 in the 11s),997 C4S Cab,CLS55 AMG,E55 AMG,C55AMG
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10-17-2023, 09:52 AM	#3
mike@x-ph.com Joint Chiefs of Staff 24392 Rep 191,249 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Both will do the job and make the same power on a stock car. The Jb4 takes 15 minutes longer to install but comes with many features and safety failsafes. You can use them or have the Jb4 run on the default settings. __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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10-17-2023, 09:55 AM	#4
Maximus_OM New Member 4 Rep 18 Posts Drives: X3M Competition Daytona Grey Join Date: Mar 2021 Location: Stratford upon avon iTrader: (0)	I was thinking about running mid pipe and maybe a 200 cell sports cat so wondering if jb4 would be better with these hardware mods? Also with both piggy backs are there maps where you can run lower octane fuel in case you cannot get high octane ? The fuel station near me regularly runs out of UK 99 RON (US 93) so sometimes need to use 95 RON (US 91)
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10-17-2023, 02:57 PM	#6
Stereolab42 Enlisted Member 86 Rep 49 Posts Drives: 2023 BMW X3M Comp Join Date: Jul 2023 Location: Bay Area, CA iTrader: (0) Garage List 2023 BMW X3M [0.00]	Been running the JB4 for weeks now, no issues (aside from the annoying install).
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10-17-2023, 10:45 PM	#7
r33_RGSport General 13053 Rep 18,756 Posts Drives: G09 XM, G05 X5 40, 991.2 T Join Date: Oct 2009 Location: So. Cal iTrader: (6)	Here are a few threads regarding RaceChip's feedback. https://x3.xbimmers.com/forums/showt...light=racechip https://x3.xbimmers.com/forums/showt...light=racechip https://x3.xbimmers.com/forums/showt...light=racechip https://x3.xbimmers.com/forums/showt...light=racechip __________________ Email:sales@rgsport.com \| IG:RGSport_USA \| Web:RGSportShop.com PM for Everyday DEALS!! MSS • iSweep • RaceChip • Sterckenn • AutoTecknic • Akrapovic • Vossen Wheels • Eventuri Active Autowerke • KW • H&R • Ohlins • Remus • and more...
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10-18-2023, 10:48 AM	#8
Must_Go_FASTER formerly rdougherty85 510 Rep 464 Posts Drives: 2022 BMW X3M Comp MBB Join Date: Sep 2021 Location: Indianapolis, IN iTrader: (1)	I can't speak to the performance of either on an S58 engine, but I have the JB4 for my B58. Really love the detail that they put into installation guides and customer service from BMS. I run E30 blends sometimes and I was able to log a few runs with the JB4 app and send them in. Was e-mailing back and forth with them for about a day and was able to easily change the settings to what they recommended. They asked for a few logs and verified everything was running smoothly. Again, can't speak to what RC offers with logs and customer service, but BMS is great to work with. I have a feeling you'd be happy with either one! Those are some big gains from just a piggyback. Cheers!
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