05-16-2023, 04:39 PM | #1 |
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Bolt ons without a tune?
A few months ago I purchased a 2023 BG M240i x drive and I love the car. However it’s time to start modding. So far I’ve got a milltek catback exhaust and an AA downpipe on order with plans to purchase a dinan CAI in the near future as well.
My question is are all of these parts safe to put on without tuning the car first or does it require a tune to be safe? To be clear I understand I probably won’t make any performance gains with these parts alone I decided to start with making the car sound good first before focusing on performance. I’m kinda new into car modding in general so any advice or tips you have are welcome thank you. |
05-16-2023, 10:41 PM | #2 | |
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I do plan on getting a tune in the coming months though and I'll be doing some data logs before tuning to see how the car is performing in its current state. |
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05-17-2023, 08:45 AM | #4 | |
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05-17-2023, 10:48 AM | #5 |
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Currently planning to run the jb4, I’m still figuring stuff out about tuning and whatnot but from what I’ve gathered since the car has the B58TU and that comes with the upgraded fuel pump and I’m adding the aa downpipe once I throw the tune on that technically makes it stage 2? (Or at least I think hahahaha) Still trying to figure out which map I’ll need to run it on because currently I think I’ll wanna just keep it on pump gas for convenience. I’m not looking to win any races I just wanna liven up the car for now, but who knows maybe at some point I’ll start playing around with ethanol mixes.
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05-17-2023, 12:08 PM | #6 | |
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I think you will notice a little difference with the Jb4 and just pump gas. But I think the car will wake up a lot more if you augment your gas with 3 to 5 gallons of ethanol. Unless you have really good pump gas you will start running into timing corrections adding some more boost. The ethanol will help keep you out of the corrections and should help to advance the timing as you rev towards redline. This is based on my experience and the fact the pump gas around me isn't the best. However, i did find a gas station within 15 minutes that sells both E85 and 93 octane at the same pump which makes throwing E in the tank a lot more convenient. I should also add the guy who bought the JB4 unit from me when I switched to MHD didn't get too much from it using different maps and regular pump gas. He has a m340i which is a B58TU car.
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05-17-2023, 02:58 PM | #7 |
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Jb4 isn't the way to go
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05-17-2023, 04:14 PM | #9 |
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05-17-2023, 04:32 PM | #10 |
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I'm guessing he would recommend a flash tune like BM3 or MHD. I switched to MHD and it is hands down much more effective than the JB4. But assuming your DME is locked down so you wouldn't be able to flash tune. I believe it is feasible to unlock your DME but the process sounds pricey and takes a while.
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05-17-2023, 04:35 PM | #11 | |
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05-17-2023, 09:06 PM | #12 |
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Just have it unlocked.. its less than 300
I can recommend a place if you want
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2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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05-18-2023, 09:43 AM | #13 | |
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map 2 for 93 Whichever map you opt for, you can expect a significant power gain to enhance your driving experience without compromising the car's dependability.
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05-18-2023, 06:17 PM | #15 |
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Thanks this is what I’ve been gathering as well but it’s nice to have a confirmer hahaha
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05-19-2023, 11:15 AM | #16 |
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05-22-2023, 10:14 AM | #17 |
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They said its a 2023, so we're in the wrong forum. Regardless, the only way to unlock these post 06/20 DMEs is through Femto and it is NOT 300.
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05-22-2023, 10:16 AM | #18 |
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Yeah, wrong forum.. completely different deal.
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2017 m240i xDrive 10.67@132.32mph w/bm3
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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05-22-2023, 10:33 AM | #19 |
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I was in the same predicament with my '21 240 before an Altima made it a non-issue. For what its worth, the only thing I had to code out was the EDC for my coilovers, every other bolt on worked perfectly without any tune. Piggybacks are his best bet unless he wants to send his DME across the ocean. There's a really good thread on the process in the G80 forums
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