[AJSpence]

Noob question here. I've got a '23 M3 Comp Xdrive, bone stock. Just bought BM3 - shipping ECU out to Femto soon. Which OTS map do you all suggest? I don't really want to mess with downpipes, etc. But I want more power (and prefer lower end/0-60 over 60-120). I'm in Orlando and can get 93 pump gas anywhere, as well as one nearby station with E85, but don't want to be limited on where I have to buy gas. Is OTS stage2 93 octane the way to go? Thanks for your help.

[SwankPeRFection]

Without a downpipe, stick to Stage1. Since BM3 gives you one free map, you can either burn that on the Stage1 map or you could run the factory CSL map on the car (which is free and would give you a bump over your stock power level) and then truly decide if you wanna go downpipes or not and if you do, then you can burn the free map credit on Stage2 instead.

[hellcat2m4]

Originally Posted by SwankPeRFection

Without a downpipe, stick to Stage1. Since BM3 gives you one free map, you can either burn that on the Stage1 map or you could run the factory CSL map on the car (which is free and would give you a bump over your stock power level) and then truly decide if you wanna go downpipes or not and if you do, then you can burn the free map credit on Stage2 instead.

This. Stage 1 93, but arguably the ethanol maps are safer with cleaner logs and more power. E30 stage 1 if you're willing to blend.

[TopJimmy]

I’d pick Stage 2 E30 tune since you have Ethanol available (fun fast map), and take the free CS+ tune (daily).

If you don’t want to mix fuels just get the Stage 2. Your cats will be fine, just turn burbles down or all the way off.

[AJSpence]

Originally Posted by TopJimmy

I’d pick Stage 2 E30 tune since you have Ethanol available (fun fast map), and take the free CS+ tune (daily).

If you don’t want to mix fuels just get the Stage 2. Your cats will be fine, just turn burbles down or all the way off.

I feel like once I have a fast tune, would I ever want to flash back to anything else? Seems like I’ll only want more. Or are the stage 2/e30/etc tunes not great for smooth daily driving?

[Jasinedward]

Spend 100$ on the map pack… gives you some room with adding mods prior to a custom tune. I ran the multimap stage 1 tune for a while and ran a best of 10.5 at 130 with a 7.9 60-130.

I just added downpipes and moved to stage 2 with the e50 tune… haven’t run the 1/4 yet but the 60 to 130 is a 6.8 now…. But it’s also waaaay hotter… I’m in Fl too over in Tampa. Going to do a custom tune next… then finish up the exhaust.

[TopJimmy]

Originally Posted by AJSpence

I feel like once I have a fast tune, would I ever want to flash back to anything else? Seems like I’ll only want more. Or are the stage 2/e30/etc tunes not great for smooth daily driving?

Plenty smooth for daily. The CS+ is free, for when you’re not near any E and need to run 93.

[mike@x-ph.com]

Get catted downpipes and run stage 2 93 maps, it's fast and reliable and won't cause any issues.

If you do not wish to mess with the downpipes, select the stage 1 93

if you want to mix E85 every now and then, select the multi-map

[AJSpence]

Originally Posted by mike@x-ph.com

Get catted downpipes and run stage 2 93 maps, it's fast and reliable and won't cause any issues.

If you do not wish to mess with the downpipes, select the stage 1 93

if you want to mix E85 every now and then, select the multi-map

Thanks for the replies. Yeah downpipes feels a bit much for my intended use (no track, daily, etc). Once I get bm3 flashed, what are benefits of taking to a tuner? I’d likely use orlandoautowerks since they’re local. I assume they’ll pull more juice out of it than I could on my own. Again, forgive the dumb questions. Just getting started in this tuning world.

[TopJimmy]

If you’re using Bootmod3 and an OTS map then a shop is NOT going to get you one more HP than you would if you did it all yourself.

Now if you’re doing a custom tune then a shop or tuner might do the initial map, and then want you to do the logging and revs by email. Some shops go drive for you and hand you a finished tune. Other shops sell you “their tune” which is a slightly hotter version of the BM3 OTS (example: Cary Jordan OTS tunes) but they don’t do any revisions to tweak it to your car.

If you have a good safe spot to do rips and collect log data then I suggest you work with a remote tuner (Paul) and do it all yourself. It’s easy, and it’s very satisfying to talk/email with your tuner and learn where your car’s limits are. If you want to go this route we can talk on the phone and make a plan.

[mike@x-ph.com]

Originally Posted by AJSpence

Thanks for the replies. Yeah downpipes feels a bit much for my intended use (no track, daily, etc). Once I get bm3 flashed, what are benefits of taking to a tuner? I’d likely use orlandoautowerks since they’re local. I assume they’ll pull more juice out of it than I could on my own. Again, forgive the dumb questions. Just getting started in this tuning world.

Off-the-shelf maps are very conservative; they are reliable and safe.

Going with a custom tuner should yield more results without sacrificing reliability since your tuner will tweak the map based off your datalogs

[Tommyschuck]

...would it be a problem to use a Stage 2 OTS map with the OPFs in place BUT with HJS Downpipes? Regards Tom

[mike@x-ph.com]

Originally Posted by Tommyschuck

...would it be a problem to use a Stage 2 OTS map with the OPFs in place BUT with HJS Downpipes? Regards Tom

You can use stage 2 with HJS downpipes

[Tommyschuck]

..is getting rid of the OPF necessary and important for the longevity of the engine or just for sound and the last 3 or 5 HP on top?

[eric97h]

Originally Posted by TopJimmy

I’d pick Stage 2 E30 tune since you have Ethanol available (fun fast map), and take the free CS+ tune (daily).

If you don’t want to mix fuels just get the Stage 2. Your cats will be fine, just turn burbles down or all the way off.

your saying without downpipes ? you wil be fine

[mike@x-ph.com]

Originally Posted by eric97h

your saying without downpipes ? you wil be fine

The OTS maps are very conservative. You can probably get away with stage 2 if you turn the burbles down, but it's not recommended to run it with stock downpipes.

[eric97h]

Originally Posted by mike@x-ph.com

The OTS maps are very conservative. You can probably get away with stage 2 if you turn the burbles down, but it's not recommended to run it with stock downpipes.

just put the burbles on 0 lmaoo

[TopJimmy]

Originally Posted by eric97h

your saying without downpipes ? you wil be fine

Exactly. Keep the burbles off, or keep your aggression settings at 5 or less. As an example the CS burble settings look like Agg=3 on Efficient/Comfort and Agg=5 on Sport and Plus.

[evidence]

Burbs help keep the turbo spooled between shifts! No idea which settings translates to the min you need to take advantage though. Anything but the lowest settings are likely more suited for a Spoon engine.

[TopJimmy]

Originally Posted by evidence

Burbs help keep the turbo spooled between shifts! No idea which settings translates to the min you need to take advantage though. Anything but the lowest settings are likely more suited for a Spoon engine.

Burbles don’t help spin turbos. Its fuel going out the exhaust for a sound effect. Backpressure spins turbos.

[evidence]

Originally Posted by TopJimmy

Burbles don’t help spin turbos. Its fuel going out the exhaust for a sound effect. Backpressure spins turbos.

Back pressure doesn't spin turbos.. exhaust going over the turbine spins turbos. Back pressure prevents efficient exhaust operation, you do not want back pressure in a turbo application. You want the opposite, vacuum to allow scavenging.

Anyway, anti-lag systems function by dumping a bit of extra fuel in after lift. This fuel ignites in the exhaust manifold creating extra heat and exhaust, keeping the turbo spooled. This combustion happens in a much less controlled manner than in the cylinder.. many small pops as pockets ignite. Burbles.

Most burbles you can hear are cosmetic as you really don't need much for anti-lag, but at the core idea can and is certainly be used for performance.