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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > MG M2 let the mods begin slowly (JB4 dyno sheets)

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      10-13-2017, 04:14 PM   #67
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Quote:
Originally Posted by MRufo View Post
Update?
He's working on it.
He has a Mac, and a Mac won't run an exe file, so it won't install WinPep, so he hasn't been able to play with the drf files yet.
As of Wednesday he figured he would use a friend's Windows computer, or else send me the drf files and I would send him back some jpeg screen shots.

Another possibility we talked about was using Boot Camp to install Windows on his Mac.
Has anybody here run WinPep that way?
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      10-15-2017, 04:23 PM   #68
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      10-15-2017, 04:48 PM   #69
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Quote:
Originally Posted by We're on Boost View Post
He's working on it.
He has a Mac, and a Mac won't run an exe file, so it won't install WinPep, so he hasn't been able to play with the drf files yet.
As of Wednesday he figured he would use a friend's Windows computer, or else send me the drf files and I would send him back some jpeg screen shots.

Another possibility we talked about was using Boot Camp to install Windows on his Mac.
Has anybody here run WinPep that way?
I also offered him my help and yes as long as you have Windows whether VirtualBox (Free), VMware Fusion or Bootcamp is fine and will all work.
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      10-15-2017, 05:19 PM   #70
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I noticed that Boot Camp asks you if you want Win10, Win8.1, or Win7.
Dynojet tech support indicated a preference for Win7, which I like also.
But, ha, in 2015 I built 2 computers using Win7, and the first thing it needed after the basic install from disk was about 3 hours of Windows updates.

So do you guys have an opinion about that - with the VirtualBox (Free), VMware Fusion or Bootcamp method, would you install Win10, Win8.1, or Win7 ?
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      10-18-2017, 08:31 PM   #71
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Sorry guys, haven't updated.Ive been busy, and Im not computer savyy at all.
"We're on boost" is willing to help me out. Isn't human email, and we will share the jpeg on here for you guys.
Keep in mind, this is all on stock fuel(92 oct) with catless dp,intake,intercooler,muffler bypass,and jb4. All the pulls were done in 5th gear.
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      10-19-2017, 03:45 AM   #72
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Sent some stuff back to you Maks. Looks good!
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      10-19-2017, 09:06 AM   #73
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Here you guys go. 3 pulls on each. Map 0, map 1, and map 2.

Thanks so much for the help bud!
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Last edited by Maks///M2; 10-19-2017 at 09:14 AM..
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      10-19-2017, 09:17 AM   #74
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Did you happen to datalog the pulls on Map 1 and Map 2 while you were on the dyno? Curious to see how much boost you're running. Map 1 is making ridiculous power for the "less aggressive" map. Map 2 gains throughout the curve are quite significant. Nice numbers all around!

I just installed my JB4 and am running 50/50 WMI on Map 3 - would be nice to compare numbers before I go and dyno next week!
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      10-19-2017, 09:51 AM   #75
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My comments:
1) Map 1 isn't really quicker. Look closer, it's a dip on red curve at 6k rpm that makes it 391whp.
2) Map 2 actually has a fatter torque curve all the way from 3200rpm.
3) Map 0, 1, 2 are basically the same above 6k, if it's not for the dip from Map1.
4) Map 0 with all hardware mods on, makes 10whp more than a 100% stock car, which makes sense.

These are some amazing dyno results, even if dyno reads 15whp higher. Or maybe M2 on 93OCT does put down 350whp stock STD Smoothing 5, English racing dyno is spot on and the 330-340whp we've seen were just SAE numbers, which is 3% lower than STD. This shows JB4 actually works very well with M2, gaining 30whp from stock. M2 stock tune, with higher load than normal N55, kind of works like a BEF.

These results also align pretty well with our long term tests on piggybacked and flashed M2. Short shifting a JB4 M2 at 6000-6200, you'll be amazed how quick it actually is in 100-200kph.
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Last edited by SeanWRT; 10-19-2017 at 09:57 AM..
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      10-19-2017, 04:48 PM   #76
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Quote:
Originally Posted by Maks///M2 View Post
Thanks so much for the help bud!
Yeah man! Glad they uploaded to the thread without any degradation. I checked, with right click, save image as, back to my computer and they are good. For example pic 1 is 1591 x 1048 pixels and 772 KB.

I looked for boost information in the drf and did not find any.

Looking some more at just map 1 pulls I noticed that pull 2 was actually a hair higher than pull 3 so I think tonight I'll screenshoot that comparison.

If anybody wants to see some other comparison let me know.


Quote:
Originally Posted by SeanWRT View Post
My comments:
1) Map 1 isn't really quicker. Look closer, it's a dip on red curve at 6k rpm that makes it 391whp.
2) Map 2 actually has a fatter torque curve all the way from 3200rpm.
Yes I agree. Map 2 would be my choice. This is why I don't just go by the "Max values" numbers you see at the top of these charts. The max values come from the highest point of some bump somewhere.


At these conditions the correction factor is very close to 1. Nice. That's what we almost always see at ER, I suppose because of the low altitude and moderate ambient temps.

Looking right now at how much lower the numbers would be if graphed in SAE, hmmm, it's about 2.5% lower at these conditions. Based just on the max power value from map 2 pull 3, it's:
STD 381.88 max power
SAE 372.45 max power
SAE shows the correction factor as 0.99 whereas STD shows the correction factor as 1.01.
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      10-19-2017, 05:34 PM   #77
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Very good job posting these clear images and not picture from computer thumbs up for that ,

just curious whats happening between 2500 and 3000rpm when the car makes 452wtq but drops like a bomb to to 400wtq picks up again slightly through the curve im pretty sure its missing adjustments or tweaking up the boost there, could be HPFP dipping there since even the WHP line drops at that point car would get walked by a Flash tuned or Map6 car running less boost but more linear

Get yourself some logs asap u can start tweaking
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      10-19-2017, 05:52 PM   #78
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Quote:
Originally Posted by FSociety View Post
just curious whats happening between 2500 and 3000rpm
I don't know what to make of that either.
Probably would be a good idea to ask Aaron, before he forgets, what he thinks is going on there.
It's very possible they could make that better.
It would be really cool to have boost curves to go along with these other curves. Would probably show us something.
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Last edited by We're on Boost; 10-19-2017 at 05:57 PM..
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      10-19-2017, 05:52 PM   #79
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Quote:
Originally Posted by FSociety View Post
Very good job posting these clear images and not picture from computer thumbs up for that ,

just curious whats happening between 2500 and 3000rpm when the car makes 452wtq but drops like a bomb to to 400wtq picks up again slightly through the curve im pretty sure its missing adjustments or tweaking up the boost there, could be HPFP dipping there since even the WHP line drops at that point car would get walked by a Flash tuned or Map6 car running less boost but more linear

Get yourself some logs asap u can start tweaking
So I talked to the tuner about it. And he was saying he dynoed a n54 or 55 with Cobb.. that was doing the same thing. But he was able to see what the engine was doing. I forgot the reasoning for it, but they said that basically the ecu is detecting torque outside its parameters, and shuts off because it's to high. So the jb4(or any piggyback) doesn't get rid of those parameters. It has to be flashed to be taken out of there. I could find out what exactly he said it was but I already forgot.
I wasn't logging during the pulls so that's going it of thin air.

Than I spoke with rk tunes and they said the opposite. They said it's jb4.

Than I spoke with wedge performance (mhd) and when he flashes you're ecu, he raises the torque limiting factor.

But we didn't notice any fueling issues on the dyno.
I've been driving around on map 1 without any sort of issues. I prefer map 1. Has a little better numbers imo, and no running into that torque limit to get cut off like on map 2


He has no where to tap into for the boost and I wasn't logging.
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      10-19-2017, 07:56 PM   #80
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Mark, my suggestion would be map1. Map2 can ?consume? your fuel pump over time, as it?s targeting maximum 6psi of boost down low and in the middle, resulting a really 20+psi in peak pre-throttle. One of my friend have his m2 run on JB4 map6 (targeting 18psi, almost flat) for the past 12 months, sometimes on ethanol. Had to admit his is one of the most abused m2s from our local ‘test’ group. His pump has been worn out and now can no longer sustain high load at above 6k rpm even on map1. Now he has to shift at 6k (it?s not slower doing this though) to avoid HPFP crash, he sees error code all the time, something like pictures as below I?m attaching.

BTW, FBO JB4 map1 is stock m4 quick after 60mph (even quicker below!), if you know when to shift. No doubt about it, we know it.
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      10-20-2017, 03:07 AM   #81
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Quote:
Originally Posted by SeanWRT View Post
Now he has to shift at 6k (it?s not slower doing this though) to avoid HPFP crash, he sees error code all the time, something like pictures as below I?m attaching.

BTW, FBO JB4 map1 is stock m4 quick after 60mph (even quicker below!), if you know when to shift. No doubt about it, we know it.
Yep - know that guy
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      10-21-2017, 08:33 AM   #82
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I'm getting a fuel pump error too
Idk what to do I have the jb4 8' the M2 and above 6k it will throw a drivetrain error malfunction helpppp!!
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      10-21-2017, 02:58 PM   #83
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I'm getting a fuel pump error too
Idk what to do I have the jb4 8' the M2 and above 6k it will throw a drivetrain error malfunction helpppp!!
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      10-21-2017, 03:43 PM   #84
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Quote:
Originally Posted by brooke1972 View Post
Please excuse the ignorant question but my 18 m2 will be in this Monday and Im debating between the jb4 and a flash. My question is does MHD have a flash for the m2? I had that flash for my 135i and loved it and still have the app on my phone.. Is BM3 the new MHD?
Mhd is in beta stage right now
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      10-21-2017, 03:53 PM   #85
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Everyone get a flash of some sort.
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      10-22-2017, 02:47 PM   #86
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Everyone get a flash of some sort.
Did you ever dyno yet? Its been quite a few months
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      11-23-2017, 10:07 AM   #87
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So I have a dumb question...... during all this discussion about the JB4 was the OP or others running the JB4 with/without EWG harness installed? Just curious since I missed it mentioned
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      11-23-2017, 10:51 AM   #88
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Quote:
Originally Posted by m2ruder View Post
So I have a dumb question...... during all this discussion about the JB4 was the OP or others running the JB4 with/without EWG harness installed? Just curious since I missed it mentioned
If only you intend to use other than map1/2, you need ewg hardness.
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