[Pray for Mojo]

Originally Posted by Jerich0

Is it true that for Map 1 you dont need EWG harness? Also I am at 6,000 ft could that be an issue?

It's true, EWG isn't required. I ordered both harnesses because I want to try Map 2 when I install my downpipe. I'm at 3,000 ft and haven't had any trouble, turbo cars usually adjust better for altitude anyhow.

[phoenixbmwlife]

Can someone please explain the real difference between stage 1 and stage 2? I'm thinking if going stage 2 but don't want to push things too hard for errors to pop up. I'm not really interested in mixing fuel (maybe just once in a while to take the car on the 1/4 mile track) I just want to use 93octane fuel and leave it but still get the power increase.

[alz0rz]

So I've been driving all day on Map 2 and I seem to be pretty rock solid, IMO. No issues and the FF/EWG wiring seems to be doing its thing. I think I am ready for the dyno this week as I detailed before. I definitely am going to do the Map 2 runs first and then go from there. I don't want to compromise the peak numbers because of heat soak!

Originally Posted by Bennu

Can someone please explain the real difference between stage 1 and stage 2? I'm thinking if going stage 2 but don't want to push things too hard for errors to pop up. I'm not really interested in mixing fuel (maybe just once in a while to take the car on the 1/4 mile track) I just want to use 93octane fuel and leave it but still get the power increase.

JB4 Stage II allows you to change maps. The Stage 1 is locked on Map 1. You don't -have- to mix fuel by going to Stage 2, and wiring up the EWG and FF wiring.. all of the extra wiring is for finer control.. I think it has been worth it for me.

[phoenixbmwlife]

Originally Posted by alz0rz

So I've been driving all day on Map 2 and I seem to be pretty rock solid, IMO. No issues and the FF/EWG wiring seems to be doing its thing. I think I am ready for the dyno this week as I detailed before. I definitely am going to do the Map 2 runs first and then go from there. I don't want to compromise the peak numbers because of heat soak!

JB4 Stage II allows you to change maps. The Stage 1 is locked on Map 1. You don't -have- to mix fuel by going to Stage 2, and wiring up the EWG and FF wiring.. all of the extra wiring is for finer control.. I think it has been worth it for me.

Thanks for the clear explanation.
Now I have some decisions to make.

[MikeASU09]

Exciting stuff man. Looking forward to the dyno pulls and whp #s.

P.S., nice avatar

[Jerich0]

Originally Posted by alz0rz

So I've been driving all day on Map 2 and I seem to be pretty rock solid, IMO. No issues and the FF/EWG wiring seems to be doing its thing. I think I am ready for the dyno this week as I detailed before. I definitely am going to do the Map 2 runs first and then go from there. I don't want to compromise the peak numbers because of heat soak!



JB4 Stage II allows you to change maps. The Stage 1 is locked on Map 1. You don't -have- to mix fuel by going to Stage 2, and wiring up the EWG and FF wiring.. all of the extra wiring is for finer control.. I think it has been worth it for me.

Thanks for the review... I plan only to run Map 1 ... So is it better if I have FF and EWG wires?

[Jerich0]

Also how involved is the FF harness install?

[daisy16905]

FF wires is piece of cake, but here is the huge issue for me!!!! YOU HAVE TO CUT TWO WIRES AND NOW ANYONE THAT KNOWS DETAILS ABOUT JB4 and SEES THOSE WIRES SPLICED BACK TOGETHER KNOWS HISTORY :-(

[alz0rz]

Yes the installation of the FF wires involves you cutting wires ON THE JB4 and capping them off, not the car! Then you just unplug the stock fuel rail connector, connect the JB4 connector in and complete the loop by connecting the stock connector into the female JB4 harness end.

That said, it is -really- easy to do, they give you the wire caps and I don't think an enthusiast that is going to buy the JB4 from you will care too much about 2 wires being cut for the FF wire installation. If anything, it saves them from some work knowing that you have already been running it and it works. I think, again if anything, that it would hold it's value just the same if not more. There are no 'wear' items on the JB4. The cut wires are also easily mendable/repairable back to their previous state.

As a side note, the EWG harness was a PAIN IN THE ASS to install. I hope I never have to do that again and compared to this it is a 9/10 (in terms of difficulty) and the FF wires would be a 2/10... and all it is is unplugging the stock connector and plugging it into the JB4 connector and looping it. It's just the location location location of the EWG connector... :/.

[alz0rz]

Alright, I updated the first post with dyno numbers and video. I have to say I am not that that impressed with the JB4!

I ran the car with it completely off and managed 325whp (with the other mods). Running Map 2 brought me up to 351whp/390tq. Only a 25whp gain with the JB4.. hmm!

[FC4]

Originally Posted by alz0rz

Alright, I updated the first post with dyno numbers and video. I have to say I am not that that impressed with the JB4!

I ran the car with it completely off and managed 325whp (with other mods). Running Map 2 brought me up to 351whp/390tq. Only a 25whp gain with the JB4.. hmm!

That's not bad at all. Remember, the car effectively comes with the MPPK from the factory, so these are gains on top of that. Had it been a 335i/435i, the end-result would have been the same, but from a lower starting point. The gains are certainly there.

What fuel were you using?

[alz0rz]

Originally Posted by FC4

That's not bad at all. Remember, the car effectively comes with the MPPK from the factory, so these are gains on top of that. Had it been a 335i/435i, the end-result would have been the same, but from a lower starting point. The gains are certainly there.

What fuel were you using?

This was with pump 93.

[qballis]

In your opinion, if I never plan on getting a DP, is it worth it for the JB4 to run map 1 only?

Looks like the gains are only ~11hp and null on the torque...

[Jerich0]

Originally Posted by alz0rz

Alright, I updated the first post with dyno numbers and video. I have to say I am not that that impressed with the JB4!

I ran the car with it completely off and managed 325whp (with the other mods). Running Map 2 brought me up to 351whp/390tq. Only a 25whp gain with the JB4.. hmm!

So most of the difference comes from the Downpipe and the intake then? when driving around in normal mode do you feel the boost come in much quicker than with the stock DP?

[daisy16905]

Just to clarify, you currently do not have FF wire or EWG wire hooked up with JB4 for these pulls correct? Were you monitoring boost? If so, did you see 12 PSI on map 2?

[HX_Guy]

Wow those are some crazy numbers, congrats! 413HP and 459TQ figuring a 15% drivetrain loss? Nuts!

Even without the JB4, just the downpipe and intake (I'm really doubting the MPE has any gains, so let's discount that), those are some amazing numbers, 383 HP and 429 TQ.

That Stage 1 vs Off is pretty shocking though, you actually lost some peak TQ?

[Ritz42]

Originally Posted by HX_Guy

Wow those are some crazy numbers, congrats! 413HP and 459TQ figuring a 15% drivetrain loss? Nuts!

Even without the JB4, just the downpipe and intake (I'm really doubting the MPE has any gains, so let's discount that), those are some amazing numbers, 383 HP and 429 TQ.

That Stage 1 vs Off is pretty shocking though, you actually lost some peak TQ?

A difference of 1 foot pound isn't really a loss or a gain. Not a noticeable one at least.

Alz0rz did you guys do mutliple pulls on each map? (I can't watch the videos here at the office, so I'm sorry if that first question was answered there) Also are the numbers using a correction factor? Or are they the uncorrected numbers off the dyno?

[phoenixbmwlife]

Originally Posted by HX_Guy

Wow those are some crazy numbers, congrats! 413HP and 459TQ figuring a 15% drivetrain loss? Nuts!

Even without the JB4, just the downpipe and intake (I'm really doubting the MPE has any gains, so let's discount that), those are some amazing numbers, 383 HP and 429 TQ.

That Stage 1 vs Off is pretty shocking though, you actually lost some peak TQ?

So 413HP and 459TQ using 92octane? I'd say bravo! This is very good.

[ManCityFan]

Originally Posted by Bennu

So 413HP and 459TQ using 92octane? I'd say bravo! This is very good.

the absolute dyno numbers are meaningless. even moreso when you try to apply an arbitrary correction to estimate crank HP. it's all about the gains over "stock", and these gains are frankly disappointing.

[alz0rz]

Before I start replying to everyones comments let me just add a little bit.

I've evaluated the graphs a little more and have come to some conclusions. The first 3 runs I did on the dyno were with the JB4 on Map 2. I did this so that any heat soak during these dyno runs would not mess up the real numbers I was after and those were strictly for Map 2. I did all of the other runs after these initial 3 runs. My point with this is that, after looking at the JB4 logs (specifically the IAT), the ambient temp and humidity at the shop I'd say heat soak was definitely an issue. According to the logs I was running up into the 160's of IAT during the later runs. Even the initial 3 runs could have been better, I think, if it had been a little cooler out (it was 88ff in the shop).

I also think I could have appreciably benefited from mixing in some E85 (~30% ish) with the pump 93 and going in on a cooler day.

As my original post said, my goal was 350whp, and I beat that by 1. So I should say I am satisfied.. but I'm also not! I am trying to determine what the deal is with the JB4 only accounting for approximately 25whp. Realistically, +25whp would be what is expected out of Map 1 (12.5 psi), not Map 2 (14.5psi). According to the logs, I met the target boost level and held it until the typical taper off point (approx mid-5000rpm ish). The boost is there, so again, I think the issue is adequate fueling and intake temperatures!

Lastly, if I truly turned the JB4 off (and I'm pretty sure I did) I am -very- happy with the gains from just the BMS Intake/ER DP alone (discounting the BMW MPE). If they truly netted ~25whp by themselves I'd say that was the best bang for the buck!

Originally Posted by qballis

In your opinion, if I never plan on getting a DP, is it worth it for the JB4 to run map 1 only?

Looks like the gains are only ~11hp and null on the torque...

Yeah, my numbers may be a bit misleading. I've seen others gain ~30hp on Map 1 and ~50 hp on Map 2. I'd say Map 1 is a safe bet but I may be doing something wrong and giving everyone the wrong impression!

Originally Posted by Jerich0

So most of the difference comes from the Downpipe and the intake then? when driving around in normal mode do you feel the boost come in much quicker than with the stock DP?

I'd say an appreciable amount came from the Intake and downpipe, yes. The boost definitely is much much punchier flooring it from 1st through 3rd, very happy with the way the car feels. Driveability of the car is also unaffected (other then how loud it is.. but that is another issue).

Originally Posted by daisy16905

Just to clarify, you currently do not have FF wire or EWG wire hooked up with JB4 for these pulls correct? Were you monitoring boost? If so, did you see 12 PSI on map 2?

Map 1 = 12psi, Map 2 = 14.5 psi.

This is running both the EWG and FF JB4 harnesses. Though, interestingly enough, I have the EWG function of the JB4 electronically disabled (via a troubleshooting option FUD = 91) for an unrelated issue... i.e. the harness is hooked up but the troubleshooting option makes the entire thing bypass so it acts as stock. The function of the EWG harness on the JB4 is to allow for finer control of the EWG. So if you were not hitting the target boost values, you could benefit from it. In my experience, I was hitting the 14.5psi boost target of Map 2 every time and again that was with the EWG harness electronically bypassed!

Originally Posted by ManCityFan

the absolute dyno numbers are meaningless. even moreso when you try to apply an arbitrary correction to estimate crank HP. it's all about the gains over "stock", and these gains are frankly disappointing.

Correct, 'gains over stock' is what I was after. I never dyno'd the car -completely- stock. 'My' stock is the car without the JB4 but with all of the other mods. And yes... it is disappointing to only see the 25whp gain from the JB4 on Map 2.

[phoenixbmwlife]

Originally Posted by ManCityFan

the absolute dyno numbers are meaningless. even moreso when you try to apply an arbitrary correction to estimate crank HP. it's all about the gains over "stock", and these gains are frankly disappointing.

Yeah. You're right and I even know this but got carried away with what I wanted to hear versus what the data actually said. Thanks for the clarification.

[HX_Guy]

Wait wait wait...what do you mean you're "pretty sure you turned off the JB4"!!