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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > N20 328i JB4 **STAGE2** Dyno Testing -- New World Record. :)
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      10-26-2013, 04:21 PM   #265
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Just got an F30 (328 xDrive) as a winter car a few weeks ago for a steal, its a retired loaner. Then last night ordered up the JB4 for it. Putting H & R springs on this week, they showed up Thursday. I think I may DiNoc the interior pieces with CF and call it a day with that car. This is my first automatic as a daily driver ever, and I'm not too keen on this 8-speed mess. Seems like this car never knows what gear it wants to be in. I'm curious to see if any of you have made any 1/4 mile passes with these cars? Where I moved to in Jersey everyone goes to the drag strip, I was wondering if it was worth taking out. I haven't found a good group of people to auto-x with out here.
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      10-26-2013, 07:08 PM   #266
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Quote:
Originally Posted by kpro135 View Post
Just got an F30 (328 xDrive) as a winter car a few weeks ago for a steal, its a retired loaner. Then last night ordered up the JB4 for it. Putting H & R springs on this week, they showed up Thursday. I think I may DiNoc the interior pieces with CF and call it a day with that car. This is my first automatic as a daily driver ever, and I'm not too keen on this 8-speed mess. Seems like this car never knows what gear it wants to be in. I'm curious to see if any of you have made any 1/4 mile passes with these cars? Where I moved to in Jersey everyone goes to the drag strip, I was wondering if it was worth taking out. I haven't found a good group of people to auto-x with out here.
Really my 8 speed is fantastic maybe as your car is an x loaner there is something wrong with it
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      10-26-2013, 10:38 PM   #267
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Quote:
Originally Posted by kpro135 View Post
This is my first automatic as a daily driver ever, and I'm not too keen on this 8-speed mess. Seems like this car never knows what gear it wants to be in.
The 8 speed zf has been lauded by the motoring press and contributors on this website alike. Mine is superb, knowing exactly what gear to be in at any given time or condition (Comfort mode).

What is your driving setup? Perhaps you have something incorrectly set or maybe, just maybe your car has an issue, which needs addressing.

Put it to your dealer's service department, but show them what you are experiencing.
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      11-02-2013, 11:05 PM   #268
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Originally Posted by David328M-Sport View Post
The 8 speed zf has been lauded by the motoring press and contributors on this website alike. Mine is superb, knowing exactly what gear to be in at any given time or condition (Comfort mode).

What is your driving setup? Perhaps you have something incorrectly set or maybe, just maybe your car has an issue, which needs addressing.

Put it to your dealer's service department, but show them what you are experiencing.
I work at the dealer. It's just how this car operates. I had one of the tech's drive it and he said that's just a characteristic of the 8-speed's.

I have a 328 xDrive, I drive it in sport mode most often, as comfort was less responsive it seems.

Don't get me rolling on the terrible turning radius...our X5 turn's tighter I do like that I can fit both infant seats in it and not have to be too close to the steering wheel.



Sorry for the thread jack. I should behave since I'm the FNG around here! received my JB4 yesterday. I just wanted to run it down the track stock, then install and run it juice boxed Used to have the JB4 on my N54 1dirty5 and loved it, its the best mod for the money. I'm pretty excited to try this on the N26. I will report back

Last edited by kpro135; 11-02-2013 at 11:13 PM.
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      11-03-2013, 01:05 AM   #269
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Many says this gear box is good. Probably and most likely from those that came from the old 3 series. If they had driven posche's dct or even Volkswagen's u would have said something different.

The 8 shifts a bit slower then I would like. Can't wait for alpina trams shift. (Since the new b3 uses the "same" 8 speed zf. )
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      07-14-2015, 08:28 AM   #270
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Porsche uses the PDK acronym and Volkswagen uses DSG. Audi calls it S-Tronic but it's all the same among the three. Tiptronic is not, it's just a shiftable TQ Converter Automatic but not the reason I am resurecting this thread. I am curious to see long term reviews on either the Active Autowerke exhaust or if anyone on here installed the AWE Tuning exhaust. I am interested in both along with tune but cannot find any long term reviews.
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      10-29-2015, 08:12 PM   #271
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Just took my n55 335i 6mt to the dealer for some basic service.
I got an F30 328 as a loaner.

Of course, i decided to run 3 gallons of E85 on this thing and WOW is all i'm going to say...

This thing LOVESSSSSSSSSSS E85.
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      10-30-2015, 01:23 AM   #272
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Presuming the 328i was stock...(ie no chip) and no ability for the car to recognize the change in fuel density (ie dramatically increase fuel amount because of e85)

Adding 3 gallons of e85 will no doubt lean out the air/fuel ratios as the density of E85 is considerably less than petrol. You need to be very careful Leaning out the A/F ratios on a turbo car..... It felt better because the increase in octane and leaning out of the factory Rich A/F ratios. Extremely dangerous without knowing how close you are to leaning it out to the point of blowing the engine up
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      11-01-2015, 03:20 PM   #273
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Quote:
Originally Posted by E92TiAg335i View Post
Just took my n55 335i 6mt to the dealer for some basic service.
I got an F30 328 as a loaner.

Of course, i decided to run 3 gallons of E85 on this thing and WOW is all i'm going to say...

This thing LOVESSSSSSSSSSS E85.
How many gallons of 93 ?
I don't mess with E85 lol since there's a lot of horror stories with ppl on stock fuel pump

Quote:
Originally Posted by Braddontroy View Post
Presuming the 328i was stock...(ie no chip) and no ability for the car to recognize the change in fuel density (ie dramatically increase fuel amount because of e85)

Adding 3 gallons of e85 will no doubt lean out the air/fuel ratios as the density of E85 is considerably less than petrol. You need to be very careful Leaning out the A/F ratios on a turbo car..... It felt better because the increase in octane and leaning out of the factory Rich A/F ratios. Extremely dangerous without knowing how close you are to leaning it out to the point of blowing the engine up
Very true and especially we haven't seen any N20 on E85 to see how much its doing on the Dyno and their long-term usage just ppl that done a few pulls and never hear about them again when it comes to E85 (n20).
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      11-01-2015, 10:12 PM   #274
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what is the best results for #91 and #93 with JB4 only?
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      11-02-2015, 06:31 AM   #275
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My understanding is that there is only one choice - MAP 1 unless you have a DP then MAP 2
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      11-04-2015, 01:43 PM   #276
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Quote:
Originally Posted by ROBNYC
Quote:
Originally Posted by E92TiAg335i View Post
Just took my n55 335i 6mt to the dealer for some basic service.
I got an F30 328 as a loaner.

Of course, i decided to run 3 gallons of E85 on this thing and WOW is all i'm going to say...

This thing LOVESSSSSSSSSSS E85.
How many gallons of 93 ?
I don't mess with E85 lol since there's a lot of horror stories with ppl on stock fuel pump

Quote:
Originally Posted by Braddontroy View Post
Presuming the 328i was stock...(ie no chip) and no ability for the car to recognize the change in fuel density (ie dramatically increase fuel amount because of e85)

Adding 3 gallons of e85 will no doubt lean out the air/fuel ratios as the density of E85 is considerably less than petrol. You need to be very careful Leaning out the A/F ratios on a turbo car..... It felt better because the increase in octane and leaning out of the factory Rich A/F ratios. Extremely dangerous without knowing how close you are to leaning it out to the point of blowing the engine up
Very true and especially we haven't seen any N20 on E85 to see how much its doing on the Dyno and their long-term usage just ppl that done a few pulls and never hear about them again when it comes to E85 (n20).
So the most i did on it when i had it was 6 gallons e85 and the rest 93... It was AMAZING hahah.
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      11-04-2015, 01:45 PM   #277
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Quote:
Originally Posted by Braddontroy
Presuming the 328i was stock...(ie no chip) and no ability for the car to recognize the change in fuel density (ie dramatically increase fuel amount because of e85)

Adding 3 gallons of e85 will no doubt lean out the air/fuel ratios as the density of E85 is considerably less than petrol. You need to be very careful Leaning out the A/F ratios on a turbo car..... It felt better because the increase in octane and leaning out of the factory Rich A/F ratios. Extremely dangerous without knowing how close you are to leaning it out to the point of blowing the engine up
You're absolutely right about it running leaner...

Did i mention it was a dealer loaner aka me not giving a single FUDGE?i
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      11-24-2015, 05:00 PM   #278
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I've been looking into running E85 once I get the JB4 for my N26 EWG 328i. 328i are not recommended to run E85 but 320i's are okay to do so. Confirmed with BMS today:

"E85 use is still not supported on the 328i EWG vehicles. The 320i has more headroom in the fuel trims to keep AFR adjusted properly. The x28i vehicles will lean out and it can cause physical damage to the engine."

Kind of bummed to hear that but hopefully there will be another solution.
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      11-25-2015, 06:42 PM   #279
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Quote:
Originally Posted by handle
I've been looking into running E85 once I get the JB4 for my N26 EWG 328i. 328i are not recommended to run E85 but 320i's are okay to do so. Confirmed with BMS today:

"E85 use is still not supported on the 328i EWG vehicles. The 320i has more headroom in the fuel trims to keep AFR adjusted properly. The x28i vehicles will lean out and it can cause physical damage to the engine."

Kind of bummed to hear that but hopefully there will be another solution.
So can those of us with 320i's run 3 gallons of E85 without the flexfuel wires or we still need it?
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      12-21-2015, 11:59 PM   #280
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Originally Posted by F30 Epal View Post
So can those of us with 320i's run 3 gallons of E85 without the flexfuel wires or we still need it?
I opted to use the Flex Fuel wires and my mixture is 4gallons e85, 12 gallons 93. We have a 16 gallon tank, right?
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      12-29-2015, 07:16 PM   #281
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      12-30-2015, 02:21 AM   #282
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Quote:
Originally Posted by SoCalDave
15.8, Yes. Close enough
Cool, thanks!
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      03-09-2018, 08:51 PM   #283
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Quote:
Originally Posted by kpro135 View Post
Just got an F30 (328 xDrive) as a winter car a few weeks ago for a steal, its a retired loaner. Then last night ordered up the JB4 for it. Putting H & R springs on this week, they showed up Thursday. I think I may DiNoc the interior pieces with CF and call it a day with that car. This is my first automatic as a daily driver ever, and I'm not too keen on this 8-speed mess. Seems like this car never knows what gear it wants to be in. I'm curious to see if any of you have made any 1/4 mile passes with these cars? Where I moved to in Jersey everyone goes to the drag strip, I was wondering if it was worth taking out. I haven't found a good group of people to auto-x with out here.

Hahaha
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      06-14-2018, 05:23 AM   #284
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
Just got this info so I thought I would share..


As you know BMS has been working on the JB4 for the N20 motor (Stage2) for the last month or so and they have made some really solid and amazing progress.

The car is 100% stock (tune only) Only mod is the JB4 and a 50% mixture of E85 fuel and 91 octane (e.g. approx E40 fuel).

Results: A new N20 2.0l world dyno record: 300+whp and 350+wtq!!! Baseline with factory tuning (only with E85 fuel) was 237whp. Gains were as high as +70whp (~90 crank hp) in areas under the curve.

A few comments:

1) Not ready to release all of the tuning details but will say peak boost was around 23psi (compared to 17psi factory), and in areas under the curve making as much as 10psi more than the factory.

2) As expected the platform LOVES E85 fuel. Performance on 91 or 93 octane fuel will be substantially lower but will be stronger than Stage1 power levels.

And a very interesting observation I think

3) During testing they opened up the airbox to simulate a high flow intake and determine the potential for intake power gains. In doing so they found exactly zero horsepower gained even at these high boost levels. The factory airbox is simply not a restriction at 300rw. For this reason its suggested you use only the factory airbox with the N20 platform. Companies claiming gains with intakes on this platform are potentially fooling themselves and/or you.

Mike

is it reliable after staged 2 ?
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