[ghostchili]

I plan on running my 2014 335xi with a JB4 stage 2 map 7 E85/93 50/50 as a daily driver. I'll be running a cat less DP, full exhaust and an intake. Is anyone else running map 7 50/50 as a daily driver? I have E85 at every gas station near my house so that's no biggie. Would I see any issues with the car?

[Eric SS]

You'll be fine but I opted for Map 2 to keep undue stress on the snail shell turbo. That little thing has to work like crazy to keep up with Map 7. I'm anxiously awaiting dash control map switching on the F30.

[F32]

Good question. I'll be doing the exact same setup and the car will be daily-driven as well.

[mike@x-ph.com]

It is a matter of preference. Map 7 is still a very safe map, but you probably are better off with a less aggressive map as a daily driver. Im running a custom map with 20psi on stock turbos so im probably not the right person to ask

[buildbright]

I would stick with Map 2 unless you have extra cooling. It's safe but your temps will be so high the car will just pull timing and boost after awhile.

[GET A GUN]

I only run map,7 all the time.
I'm always on some sort of high octane mix.

[ghostchili]

Originally Posted by buildbright

I would stick with Map 2 unless you have extra cooling. It's safe but your temps will be so high the car will just pull timing and boost after awhile.

The E85 handles most of the cooling. Burger tuning said I don't even need the aftermarket intercooler due to the E85 burning so cool.

[ghostchili]

Originally Posted by mike@x-ph.com

It is a matter of preference. Map 7 is still a very safe map, but you probably are better off with a less aggressive map as a daily driver. Im running a custom map with 20psi on stock turbos so im probably not the right person to ask

I'd like to try that

[tdizzle]

Originally Posted by ghostchili

The E85 handles most of the cooling. Burger tuning said I don't even need the aftermarket intercooler due to the E85 burning so cool.

That's always been my impression. The turbo will be spinning faster but heat shouldn't be an issue if you're running E85.

[buildbright]

Originally Posted by ghostchili

The E85 handles most of the cooling. Burger tuning said I don't even need the aftermarket intercooler due to the E85 burning so cool.

If Terry told you that then that is the advice I would follow. I know from my driving style and logs that I could use meth and or intercooler, specially for the summer months. That's one of the biggest advantages of meth it will keep your IAT down because your car will pull timing and boost. My car is much slower in the summer time without it.

[mike@x-ph.com]

I would think no matter what our FMIC needs to be upgraded, but if terry said you don't need to change it, then you don't He knows what he is talking about.

[ghostchili]

Originally Posted by mike@x-ph.com

I would think no matter what our FMIC needs to be upgraded, but if terry said you don't need to change it, then you don't He knows what he is talking about.

I'm beginning to wonder how I worded my question to Terry, I'll have to ask him again once the weather warms up.

[mike@x-ph.com]

Good idea

[M-terkait]

i'm new to JB4 stage 2 came from MPPK i feel more torque but im not sure when to shift at 2nd gear (6.5k?)
3rd/4th ??
any tips ?

[Eric SS]

Originally Posted by M-terkait

i'm new to JB4 stage 2 came from MPPK i feel more torque but im not sure when to shift at 2nd gear (6.5k?)
3rd/4th ??
any tips ?

5,800

[M-terkait]

aww Q_Q i used to shift at 7.050 when i had MPPK

i love high revving engines , i guess ill have to switch to map0 when i wanna rev it high ;p

[tdizzle]

Originally Posted by M-terkait

aww Q_Q i used to shift at 7.050 when i had MPPK

i love high revving engines , i guess ill have to switch to map0 when i wanna rev it high ;p

lol

I don't think the torque curve changes much between two, just the area under the curve, i.e., jb4 will make more power at a given RPM for the most part.

That said, yea these engines/turbo combos lose steam at higher RPM. There is a calculator out there somewhere that allows you to input the torque curve and it tells you the optimum shift points. If I recall correctly in first (to second) and 2nd (to third) it's at redline and third (to 4th) around 6500.

I read about why and forget the details but what I got out of it was the first two shifts should be near redline with the next coming a few hundred RPM shorter due to gearing and the potential for less shifts. Note this is for maximum acceleration not maximum hp at all times, which is counterproductive in the lower gears when trying for maximum acceleration. Kinda not what you'd expect but apparently short shifting isn't the way to go until you are in 3rd and above.

[SflBimmer8484]

I ran it daily on e85 for 6 months no issues.

[Eric SS]

Originally Posted by tdizzle

lol

I don't think the torque curve changes much between two, just the area under the curve, i.e., jb4 will make more power at a given RPM for the most part.

That said, yea these engines/turbo combos lose steam at higher RPM. There is a calculator out there somewhere that allows you to input the torque curve and it tells you the optimum shift points. If I recall correctly in first (to second) and 2nd (to third) it's at redline and third (to 4th) around 6500.

I read about why and forget the details but what I got out of it was the first two shifts should be near redline with the next coming a few hundred RPM shorter due to gearing and the potential for less shifts. Note this is for maximum acceleration not maximum hp at all times, which is counterproductive in the lower gears when trying for maximum acceleration. Kinda not what you'd expect but apparently short shifting isn't the way to go until you are in 3rd and above.

That's one school of thought. One could argue though that what you make up for in torque multiplication by staying in a gear longer, you lose that by being past the optimal torque curve by shifting later. Think about it. By shifting at 6,500 into 2nd gear instead of 5,800 you're gaining what? 3mph? (That's a total estimate on the mph gain but you get the point).

Although, I agree with you a little more because of our flat torque curve. On a non-turbo engine with a Big torque peak, my old school rational makes more sense : )

[maddog3xx8]

Originally Posted by mike@x-ph.com

It is a matter of preference. Map 7 is still a very safe map, but you probably are better off with a less aggressive map as a daily driver. Im running a custom map with 20psi on stock turbos so im probably not the right person to ask

Hi Mike,

Bringing this post back from the dead, how did you go about getting a custom map done, I have some dyno time coming up and wanted to fine tune the JB4 as much as possible.

[mike@x-ph.com]

Originally Posted by maddog3xx8

Hi Mike,

Bringing this post back from the dead, how did you go about getting a custom map done, I have some dyno time coming up and wanted to fine tune the JB4 as much as possible.

I did it myself using map 6.

[Mike@N54Tuning.com]

Originally Posted by mike@x-ph.com

I did it myself using map 6.

Post your map6 values.. Would be cool to see. What gas were you running on the map?

Mike