[Hendo741]

K&N drop in filter, Active Autoworkes catted DP, JB4 Map 4 w/ 2 gal E85.

245 Conti DWS 06+ all season tires on a damp overcast day. Car is still learning the map and IATs were over 110. I think getting down into the 3.2s, maybe even 3.1s is attainable under the right conditions.

[kumizi206]

You're not wasting any time. Do you know how much boost our cars run stock?


Map0: Stock tuning, fully disable JB4
Map1: 3psi over stock added (91 octane)
Map2: 4psi over stock added (91-93 octane)
Map3: 6psi over stock added (93+ octane)
Map4: Absolute target map with peak target of 20psi (93+ and/or 30% E85, EWG connector suggested)
Map5: Absolute target map with peak target of 22psi (30% E85+ fuel, EWG connector suggested)

[Hendo741]

Originally Posted by kumizi206

You're not wasting any time. Do you know how much boost our cars run stock?


Map0: Stock tuning, fully disable JB4
Map1: 3psi over stock added (91 octane)
Map2: 4psi over stock added (91-93 octane)
Map3: 6psi over stock added (93+ octane)
Map4: Absolute target map with peak target of 20psi (93+ and/or 30% E85, EWG connector suggested)
Map5: Absolute target map with peak target of 22psi (30% E85+ fuel, EWG connector suggested)

I did some map 0 logs to get a baseline, and the car is usually around 14.5-15.5. Engine nerds are going to say the B58 doesn't have a boost table and that it works by using volumetric algorithms with cylinder fill and target load to calculate boost from requested torque and so on. Usual boost is around 15 stock

Edit: Upon further review of logs (some from the M240 some from my Supra but still a B58TU) it appears the ECU will sometimes request boost up to 20 PSI. It looks like it requests higher boost with higher IATs. Sub 100 F IATs result in 14-16 psi requests. Once the IATs start going up, so does requested boost. Makes sense from a stand point of hotter air is less dense and contains less O2 particles, so jam more air in the engine for similar burn. It also retards ignition advance in these scenarios.

[Lightngsvt]

Wow! So what would a 3.4 0-60 translate into 1/4 mile times?

[giolanzarin]

Originally Posted by Hendo741

K&N drop in filter, Active Autoworkes catted DP, JB4 Map 4 w/ 2 gal E85.

245 Conti DWS 06+ all season tires on a damp overcast day. Car is still learning the map and IATs were over 110. I think getting down into the 3.2s, maybe even 3.1s is attainable under the right conditions.

Do you have a video of how the car sounds with that downpipe?

[Hendo741]

Originally Posted by Lightngsvt

Wow! So what would a 3.4 0-60 translate into 1/4 mile times?

Don't have that data yet, but I'm guessing mid to low 11s pretty easy.

[Hendo741]

Originally Posted by giolanzarin

Do you have a video of how the car sounds with that downpipe?

Not yet. I'll see if I can put something together next week. Heading out of town tomorrow for a ski trip.

I will say that it does increase the volume a decent amount, but isn't obnoxious or drone in the cabin. I think it's a happy medium, plus can provide actual performance gains.

[GT_Juls]

Wow thanks for posting this!!!

[zipstic]

Impressive numbers!

[Ricochet48]

I plan on going with a similar setup, some sort of intake (either just the drop-in or a whole setup for better sound), catted DP, and tune. Those numbers are quite impressive!

I have access to lots of E85 (heart of downtown Chicago), but haven't researched it enough (is JB4 too 'dumb', are upgraded pumps needed, how to properly mix, ability to easily switch back to 93 when in a pinch, is it overall worth it, etc.).

[M_85]

Originally Posted by Hendo741

K&N drop in filter, Active Autoworkes catted DP, JB4 Map 4 w/ 2 gal E85.

245 Conti DWS 06+ all season tires on a damp overcast day. Car is still learning the map and IATs were over 110. I think getting down into the 3.2s, maybe even 3.1s is attainable under the right conditions.

Impressive numbers bro. Hey can you send the link of the K N air filter you bought for the 2022 m240i?

[Hendo741]

Originally Posted by Ricochet48

I plan on going with a similar setup, some sort of intake (either just the drop-in or a whole setup for better sound), catted DP, and tune. Those numbers are quite impressive!

I have access to lots of E85 (heart of downtown Chicago), but haven't researched it enough (is JB4 too 'dumb', are upgraded pumps needed, how to properly mix, ability to easily switch back to 93 when in a pinch, is it overall worth it, etc.).

Can't do an actual tune on these cars, and maybe never will. Encrypted Bosch ECUs and whatnot. JB4 is a good piggyback alternative. I just add 3 gallons of E every time I fill up. Dont need any fueling upgrades as long as you dont go above E40 or so. its super easy to switch maps, so you can always go map 0 (disabled) or map 1 (+3 psi) if youre on a trip and dont have access to E.

This is the same JB4 that was on my Supra so I have a bit of experience in the arena. Let me know if you have any questions.

[Hendo741]

Originally Posted by M_85

Impressive numbers bro. Hey can you send the link of the K N air filter you bought for the 2022 m240i?

Its the same drop in filter that was in my Supra lol. pretty sure all the B58s are mostly interchangeable.

https://www.knfilters.com/33-3136-re...kaAqqZEALw_wcB

[giolanzarin]

Originally Posted by Hendo741

Its the same drop in filter that was in my Supra lol. pretty sure all the B58s are mostly interchangeable.

https://www.knfilters.com/33-3136-re...kaAqqZEALw_wcB

Hey so I'm pretty new to any type of car mods. All you did was get that new air filter but not an air intake? What difference does that make?

[M_85]

Originally Posted by Hendo741

Its the same drop in filter that was in my Supra lol. pretty sure all the B58s are mostly interchangeable.

https://www.knfilters.com/33-3136-re...kaAqqZEALw_wcB

Thanks bro. I actually tried to used my old K N air filter from my 2020 m240i and it wasn't interchangeable. I will give This one a shot. 💪🏽💪🏽

[SupraCooper]

You beat me to it!

[Ricochet48]

Originally Posted by Hendo741

Can't do an actual tune on these cars, and maybe never will. Encrypted Bosch ECUs and whatnot. JB4 is a good piggyback alternative. I just add 3 gallons of E every time I fill up. Dont need any fueling upgrades as long as you dont go above E40 or so. its super easy to switch maps, so you can always go map 0 (disabled) or map 1 (+3 psi) if youre on a trip and dont have access to E.

This is the same JB4 that was on my Supra so I have a bit of experience in the arena. Let me know if you have any questions.

Thanks a lot for the info.

Yup, I've been following the locked DME issue since the onset on the SupraMKV forums. Crazy that the Russian FEMTO route is still basically the only option, thought it would have been cracked by now. Additionally, BMW dealers (like Audit) can now flag just about everything including a JB4 (as the boost would be out of range), so it's a risk in general. I plan to buy used a let the first buyer take the depreciation hit though, so I'm not too concerned on that front.

Great that switching maps is so easy. As hinted, there's literally like 5 gas stations in a mile of me with E85 so this might be viable (and seems to really up the performance!).

[MrFoxy]

Originally Posted by M_85

Thanks bro. I actually tried to used my old K N air filter from my 2020 m240i and it wasn't interchangeable. I will give This one a shot. 💪🏽💪🏽

Keep us posted when you get this fitted mate

[Hendo741]

Originally Posted by Ricochet48

Thanks a lot for the info.

Yup, I've been following the locked DME issue since the onset on the SupraMKV forums. Crazy that the Russian FEMTO route is still basically the only option, thought it would have been cracked by now. Additionally, BMW dealers (like Audit) can now flag just about everything including a JB4 (as the boost would be out of range), so it's a risk in general. I plan to buy used a let the first buyer take the depreciation hit though, so I'm not too concerned on that front.

Great that switching maps is so easy. As hinted, there's literally like 5 gas stations in a mile of me with E85 so this might be viable (and seems to really up the performance!).

My understanding is that femto is only doing certain DMEs. I was told just G8x M3/4 and Supras. Apparently G2x and G4x aren't eligible yet. Different bootloaders or something like that. But if 1 shop can do it, more will follow, and eventually it'll be uocked or cloneable.

[kuzdu]

do a lot of logging and watch your fuel trims i had some situations where it was maxing out and the car would drop into map8. needed to work with Terry and we made some adjustments to make it stable. E40 with jb4 on our cars will run good for a while but eventually it will pull timing, the ECU will learn and try to adjust. the only way to fix this is a BEF with MHD which we can't do yet. i run E30 now all the time and my fuel trims are stable and maxing out at 25.1 lbs of boost. enjoy the car its a beast.....cant drive in peace everyone wants to race lol

[stylinexpat]

Originally Posted by Hendo741

Don't have that data yet, but I'm guessing mid to low 11s pretty easy.

120Mph..?

[hermiti]

Can you post an audio clip with your downpipe? Curious if it sounds just like the supra with a catted downpipe.