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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Vbox results: Stock weight, stock RFTs



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      03-23-2010, 06:01 PM   #1
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Vbox results: Stock weight, stock RFTs

I have been doing more testing on the car almost every night, evaluating performance increases/decreases with different modification levels.

As I stated before, on stock boost, the car ran stronger and smoother with the meth deactivated. Probably because the meth trigger threshold was barely, intermittantly being exceeded during full throttle runs.

13.3 @ 109.9 mph
0-60: 4.9 sec. (2.2 sec 60’)

On the JB3 map #9 w/meth (12-13psi of boost on my car): the trap speed jumped over 10mph!

12.6 @ 120.5mph
0-60: 4.4 seconds (2.3 sec 60’)

(a little more difficult to launch)


The aforementioned runs were:
On 97 octane
Passenger Seats Removed
Braille Battery
K1 17" Wheels, Hoosiers/Generals
2.5" UR downpipes
BMS DCI

Since people were very impressed the car would almost run 110mph on stock boost, they wondering what the car would run on 91 octane and stock weight. I predicted 106-107mph, and therefore decided it would be interesting to test and confirm my projections. Kind of like an exercise in reverse engineering!

I put the seats back in
I put the stock battery in
I put the stock wheels/runflats on
I put 91 octane in the tank.

This yielded the following results on stock boost:

13.3 @ 107.1 mph
0-60: 4.8 sec (2.1 sec 60’)

(good traction with runflats, and stock weight!)

I then switched back to the map#9 + meth (12-13psi boost average)

12.4 @ 118.00 mph
0-60: 4.1 sec (2.0 sec 60’)

(still impressed with these stock RFTs!)

So again, over a 10mph trap speed increase just by turning on the tune/meth!

Additionally, I am very much relieved that my trans is working flawlessly at these less than insane power levels. Shifts are quick and crisp, with no rpm bounce, as you can see in the videos I just took.


Remember, the 118mph vbox run would be 120.5mph traps speeds at a dragstrip such as Sac, with pretty much just tune, meth, DCI, and UR DPs. You could probably substitute MS109 instead of the meth and get similar results.

As I commented on before, the installation of the downpipes had resulted in about a 1mph increase in trap speeds, from 122.5 to 123.5 mph, 91 octane + meth, map#7 (v.1.4). But after a week later when I went to Sacramento, I was only getting about 121.8 mph on the Vbox, hence the track slip showed 124.4 mph instead of the expected 126mph.

Additonally, looking back in April of last year when I set the tune only record of 120.9 (with weight reduction), the vbox read .60mph faster than the track slip, instead of 2.5mph slower. (3.1 mph diff). So currently at that track, my tune only run would have been 124mph! Who is to say that other tracks aren’t faster too, that’s why we need some other people to post their track/vbox comparisons. But in retrospect, getting 123.6mph on the vbox without nitrous, and 133mph with nitrous would be 126.1mph and 135.5mph record setting runs respectively.

Its also amazing how quickly these cars can be returned to near stock configurations.
Its then that you realize how little work it takes for our cars reach tremendous some amazing performance levels.
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Last edited by hotrod182; 03-23-2010 at 10:55 PM.
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      03-23-2010, 06:08 PM   #2
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This is before restoring the car to stock weight
First on stock boost, 97 octane. tune bypass 109.9 mph
Second run is on the JB3 2.0, 97 oct+meth 120.5mph
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60-130mph: 6.95 seconds stock turbo WR (.16% slope)

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      03-23-2010, 06:09 PM   #3
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Here are the results after restoring the car to stock weight and putting 91 octane in tank.

107.1 mph stock boost

118 mph JB3 91 oct+ meth
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2008 Black 335i Sedan. 11.11@ 129.47 mph,(8.39 sec 60-130 stock turboWR)
2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph (N54 trap speed WR)
60-130mph: 6.95 seconds stock turbo WR (.16% slope)

Last edited by hotrod182; 03-23-2010 at 11:08 PM.
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      03-23-2010, 06:10 PM   #4
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I will post the videos when I down load them, showing boost levels, etc.
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60-130mph: 6.95 seconds stock turbo WR (.16% slope)
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      03-23-2010, 06:14 PM   #5
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Quote:
Originally Posted by hotrod182 View Post
13.3 @ 109.9 mph
0-60: 4.9 sec. (2.2 sec 60)

On the JB3 map #9 w/meth (12-13psi of boost on my car): the trap speed jumped over 10mph!

12.6 @ 120.5mph
0-60: 2.3 seconds (2.3 sec 60)

(a little more difficult to launch)
Is that 2.3 second 0-60mph an error? Thanks. Good info.
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      03-23-2010, 06:15 PM   #6
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How is it you are getting such low boost on map 9? When i was running JB3 on map 6 i was getting 15.5+ psi.
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      03-23-2010, 06:18 PM   #7
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How is it you are getting such low boost on map 9? When i was running JB3 on map 6 i was getting 15.5+ psi.
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      03-23-2010, 06:18 PM   #8
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You have a 0-60 mph time of 2.3 up there. What was that real number?

Thanks, this is all good info!
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      03-23-2010, 10:53 PM   #9
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Interesting results on stock boost. Looks like the weight is making a worth while difference. Have you done an oil change since you have been running the N20 to see how it looks and see if you have any signs of bearing issues?


I have been doing some tests here and there and on map 5 and totally stock otherwise for some reason I am only getting 6.4-6.5sec 60-100 but my 0-60 was 4.8 then I tried a soft 2nd gear launch with a slight downhill that is barely noticeable and got 4.5 to 60 with a 2.3 60ft. I do think I have another weak HPFP though since I have gotten several long cranks over the last 2 weeks. Also these test are done at over 1200ft elevation but I have no idea what the DA is since I have not cared to find out yet. I did see a 60-100 of 5.5sec once last night on the freeway but I looked at it again today and there is a slight downhill in that area but not major. Maybe a 5ft drop over the entire distance before it starts to go uphill again.
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      03-23-2010, 10:58 PM   #10
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like this thread.
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      03-23-2010, 11:01 PM   #11
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I think he's running allot more boost. If I'm not mistaken from the videos I've seen, he's going by the BMS gauge. I used to use it and stopped, it's not very accurate. I installed a mechanical one to do some comparisons and boost was way off.

The mechanical gauge was reading about 15+ to 16.3 psi on Map9 and the BMS Gauge only read about 13.9 peak.

And even did some logs with the JB3 interface and same thing, the boost gauge I don't think is fast enough. The programming needs to be changed a bit I think.
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      03-23-2010, 11:11 PM   #12
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Quote:
Originally Posted by yandyr View Post
I think he's running allot more boost. If I'm not mistaken from the videos I've seen, he's going by the BMS gauge. I used to use it and stopped, it's not very accurate. I installed a mechanical one to do some comparisons and boost was way off.

The mechanical gauge was reading about 15+ to 16.3 psi on Map9 and the BMS Gauge only read about 13.9 peak.

And even did some logs with the JB3 interface and same thing, the boost gauge I don't think is fast enough. The programming needs to be changed a bit I think.
Its accurate enough, compare it to the video I made the day before on stock boost with the mechanical gauge.
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60-130mph: 6.95 seconds stock turbo WR (.16% slope)
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      03-23-2010, 11:11 PM   #13
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Quote:
Originally Posted by yandyr View Post
I think he's running allot more boost. If I'm not mistaken from the videos I've seen, he's going by the BMS gauge. I used to use it and stopped, it's not very accurate. I installed a mechanical one to do some comparisons and boost was way off.

The mechanical gauge was reading about 15+ to 16.3 psi on Map9 and the BMS Gauge only read about 13.9 peak.

And even did some logs with the JB3 interface and same thing, the boost gauge I don't think is fast enough. The programming needs to be changed a bit I think.
Hmmm, interesting note about the boost gauge.. curious as to what others think?
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      03-23-2010, 11:17 PM   #14
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Quote:
Originally Posted by scottp999 View Post
You have a 0-60 mph time of 2.3 up there. What was that real number?

Corrected, that was my 60' time LOL.

Thanks, this is all good info!
Quote:
Originally Posted by yandyr View Post
I think he's running allot more boost. If I'm not mistaken from the videos I've seen, he's going by the BMS gauge. I used to use it and stopped, it's not very accurate. I installed a mechanical one to do some comparisons and boost was way off.

The mechanical gauge was reading about 15+ to 16.3 psi on Map9 and the BMS Gauge only read about 13.9 peak.

And even did some logs with the JB3 interface and same thing, the boost gauge I don't think is fast enough. The programming needs to be changed a bit I think.
I run the mechanical gauge and BMS gauge simultaneously, they are the same. You can see in my video the day before I was running the stock boost showing the reading on the mechanical gauge. They are very close to the same readings.

My car never made much boost on the 2.0 maps unless I go custom.

I am thinking 118mph is great for stock weight and RFTs on 12-13psi of boost.

My next step is to raise is to 16-17 psi like others are running and see if I get an improvement. It will be phenomenal if I can get close to 120mph on stock weight, 91 octane! I think last time I got 119.8 mph or something on 1.4 when I put the bags of salt in my car to prove a point.

If I can get 120mph, that is 122.5mph at the Sac dragstrip. Now that wouldn't be too shabby considering fairly minimal mods, 91 octane, bone stock rear exhaust ,intercooler, etc. Just JB3, 2.5" DPs
DCI and Meth!

And if you do your calculations and see that race fuel, traction in 1st gear, and weight reduction would add 2.5-3mph, you would see we are back on record breaking trap speeds at Sac for a non nitrous run. Infact, my best vbox was 133.6 mph without nitrous. This would have been a 126.1 mph record breaking run a Sacramento.
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      03-23-2010, 11:23 PM   #15
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How are you only getting 12-13psi on map 9?
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      03-23-2010, 11:31 PM   #16
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Quote:
Originally Posted by dlbrooks18 View Post
Hmmm, interesting note about the boost gauge.. curious as to what others think?
Quote:
Originally Posted by SLV335I View Post
How are you only getting 12-13psi on map 9?
Tell you what, if my 12-13psi is really 16-17 psi like you think, I will turn up the boost to 15-17psi boost. If it really is 20PSI+, I don't think it will be working very well on 91 oct+ meth without any type of surging, codes, etc.

I will go and switch my map to the higher boost one and see if I can get you some numbers back tonight.
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      03-23-2010, 11:51 PM   #17
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It's just odd that every other person that uses map 9 runs 2-3 more lbs of boost than your AKA "Factory Freak"
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      03-23-2010, 11:52 PM   #18
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Warren, do you use the 1 foot rollout feature on your vBox to replicate the drag strip results as indicated in the vBox directions?
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      03-24-2010, 12:07 AM   #19
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Hey, I have GIAC stage 1 with just an FMIC. If I was as good as a driver like you, would I be able to hit 12s?
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      03-24-2010, 12:21 AM   #20
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Quote:
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It's just odd that every other person that uses map 9 runs 2-3 more lbs of boost than your AKA "Factory Freak"
108Mph with downpipes and DCI..doesn't sound that outrageous to me
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Warren, do you use the 1 foot rollout feature on your vBox to replicate the drag strip results as indicated in the vBox directions?
I do use the one foot roll out standard.
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60-130mph: 6.95 seconds stock turbo WR (.16% slope)
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      03-24-2010, 12:37 AM   #21
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Quote:
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108Mph with downpipes and DCI..doesn't sound that outrageous to me
+1, I think my buddies car went 107 box stock with octane.
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      03-24-2010, 01:19 AM   #22
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Quote:
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108Mph with downpipes and DCI..doesn't sound that outrageous to me


I do use the one foot roll out standard.
Talking about 118MPH on 12 PSI boost no spray. Not your stock run.
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