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BMW 3-Series (E90 E92) Forum
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JB4 on a 2012 335is DCT
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04-18-2012, 05:44 PM | #1 |
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JB4 on a 2012 335is DCT
I have been thinking about adding a JB4 to my 2012 335is, I'm not planning on adding any more upgrades. Is it safe? Do i have to worry when i take it to the dealer for service? What kind of gain will i expect to get? Does it effect the power band? Can the DCT handle the upgrade with no issues? I would really appreciate all your comments
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04-18-2012, 07:24 PM | #2 |
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the 335is is not much diffrent then any other normal n54 engine and yes running jb4 on the stock engine wont harm anything else it'll be just less beneficial then having upgrades
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04-18-2012, 08:20 PM | #4 |
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There is a map for 335is and always clear codes and remove!
You could leave it on for oil change but i wouldnt risk it, all they have to do is press volume and channel to easily see if you have a jb4. If you take it out youll be fine. |
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04-19-2012, 07:29 PM | #8 | |
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Quote:
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2015 AY M4, 6sp, KW V3, VFF 103, AWE non-Res, BMC filters, M-Performance Aero.
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04-19-2012, 07:31 PM | #9 | |
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04-19-2012, 09:49 PM | #10 |
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I've got it on mine and I love it! Once you learn how to install it you'll quickly learn that it won't take you more than 20 minutes to remove when bringing it into the dealer.
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04-28-2012, 07:19 PM | #12 |
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Just thinking out loud but, why don't we start a 335is tuned thread, Vishnu, Cobb, JB etc? That way, anyone looking to mod their is can reference that thread.
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04-29-2012, 11:39 AM | #13 | |
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No mods, 94 octane, Dynojet: 1 pull stock 314whp & 3 pulls JB4 old Map 2 365whp. New 335is Map 6 not yet dyno tested on my car but is measurably quicker with an average of 2.5PSI increase over the old general Map 2 running 15psi from 2500 to 5000rpm. Now has more boost from off idle to 5500rpm, = boost at 6000rpm, 1/2psi less boost at 6500rpm & 1psi less at 7000rpm then the 335i map. I shift at 6250 with shift lights so my average boost increase in my normal rev range over the old map 2 is about 2psi. Have not dynoed the new maps & have no idea what 2PSI is worth in whp but the butt dyno & a speed to distance place I measure at show a quicker car. One member here with posted before after time slips has shown +.3 second in the 1/4 mile & a few mph down to 12.5/115mps with just the map change. New Map 6 requires 93 octane gas which is standard high test in NC.
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04-29-2012, 12:15 PM | #15 |
2020 Z4 M40i - 2022 M4C Convt
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2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00] |
The OP specifically asked about the JB4. I know the other piggy back fanboi club which has a heavy presence here might have a problem with that but if an alternative is being considered Cobb would be the way to go.
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