[dirtyf30nyc]

First time launching the car since I got it. Bone stock n26 32i x drive. 13.8 at 97mph.

Back after injen intake, bms stage 1 flash, 4 inch catless dp, oem exhuast with muffler delete.

Had her at 13.1 with 1.7 60ft. Trap was 102.7

Hoping to upgrade the jb4, bigger fmic, meth, and bigger turbo. Shooting for the low 12 high 11 area. Only question is how long the the motor will last lol

[FSociety]

Originally Posted by dirtyf30nyc

First time launching the car since I got it. Bone stock n26 32i x drive. 13.8 at 97mph.

Back after injen intake, bms stage 1 flash, 4 inch catless dp, oem exhuast with muffler delete.

Had her at 13.1 with 1.7 60ft. Trap was 102.7

Hoping to upgrade the jb4, bigger fmic, meth, and bigger turbo. Shooting for the low 12 high 11 area. Only question is how long the the motor will last lol

where you ran 13.1 with all those mods?
jamoka3 is in NJ and he's running 13.1 w/o DP/intake/etc just Active8 w/ RaceGas

im 100% sure that intake is hurting instead of helping, the N20 doesn't like it too much. And maybe bms stage1 is not taking advantage of the catless dp so u should either flash tune or get jb4 (map2 for DP or 93 octane)

[dirtyf30nyc]

Originally Posted by ROBNYC

where you ran 13.1 with all those mods?
jamoka3 is in NJ and he's running 13.1 w/o DP/intake/etc just Active8 w/ RaceGas

im 100% sure that intake is hurting instead of helping, the N20 doesn't like it too much. And maybe bms stage1 is not taking advantage of the catless dp so u should either flash tune or get jb4 (map2 for DP or 93 octane)

Just the stage 1 plug n play, intake , downpipe , and muffler delete. I really need the stage 2 jb4 to fine tune it. Before I did all those mods I was 13.8

[dirtyf30nyc]

Originally Posted by ROBNYC

where you ran 13.1 with all those mods?
jamoka3 is in NJ and he's running 13.1 w/o DP/intake/etc just Active8 w/ RaceGas

im 100% sure that intake is hurting instead of helping, the N20 doesn't like it too much. And maybe bms stage1 is not taking advantage of the catless dp so u should either flash tune or get jb4 (map2 for DP or 93 octane)

It's weird, I then see other people running like 13.4 or 13.5 with the stage 2 jb4, I also had enough gallons of c16 in the car. I'm having the plugs replaced soon through bmw, gonna parade to stage 2 on the jb4 and fine tune it from there.

[Max Well]

Originally Posted by jamoka3

long post warning!
Went back to the track on 3/25/16. Island Dragway in New Jersey.
Im running the 2014 328i Xdrive, auto, N26 engine. Bone stock!.
Sport + coded and launch control active.

CAR #844
Only upgrade is the Active Autowerkes Active 8 Module.
*Used 8 gallons of 103 Octane Race fuel made with race-gas Racing fuel Concentrate and 93 octane base Shell V power fuel.
http://race-gas.com/

Best run of the night (and so happy to break into the 12's) was a 12.928!
I was running low 13's all night 13.106, 13.090, all on MAP 8. (see pics)
I finally had enough, AFTER about 7 runs hitting low 13's so i did one thing I would NEVER recommend, I pulled the air filters (the N26 engine has two, a normal paper air filter and one behind it for emissions). But it really helped my top end and gave me a higher trap speed, and I finally got into the 12's.
In reality i would rather know i'm running low 13's and keep the intake of my engine clean then run high 12's and have a chance of sucking up some road debris and killing the turbo or internals...

So since we all know "talk is cheap" here are my time slips...

Jamoka3 - I entered your drag slip data into the Excel Template as I was curious to see your split times (hopefully I entered them all correctly). Although you mention you pulled the air filters after 7 runs, it would appear based on the time stamp and race round numbers it was in the middle of the six slips you posted (although there seems to be a discrepancy as Round 319 was at 10:20PM and Round 441 was at 10:17PM so maybe those round numbers are random).

Interestingly it appears the vast majority of your split times after the 330' mark show improvement as the night wore on (except of course for the run without the air filters). Not sure the reason(s) - if it is due to subtle weight differences as gas is being used, or changes in the car's programming matrix after it gets some runs under its belt, or whether the engine's mechanics come into play, ...?

Also interesting that the slowest 60'-330' split time was the one without the filters then it clearly takes the times thereafter. Someone into racing and engine dynamics might could explain that one.

It would be interesting to see which of your air filters (pre- or post- engine) seems to make the most difference on improving your engine performance. If the track is clean and you could run a stock, then with just the air filter, then just the emissions filter, then with both removed as you did on the 25th, the split times might provide some clues as to which filter is slowing your performance the most.

Max

[jamoka3]

Max Well- Once again thanks for your time and help in calculations.

Rob (robnyc) and I where talking about this and unfortunately, I am thinking the times guy at the track got the lanes mixed up as the times in the next lane on my time slip makes more sense, even still i was running consistent low 13's pretty much all night... I only removed the main air filter but left the gray post- emissions filter still in place. I do plan on going back to Island soon and maybe making my way down to ATCO for some comparison runs? I will post the results as soon as we go.

[Max Well]

Originally Posted by jamoka3

Max Well- Once again thanks for your time and help in calculations.

Rob (robnyc) and I where talking about this and unfortunately, I am thinking the times guy at the track got the lanes mixed up as the times in the next lane on my time slip makes more sense, even still i was running consistent low 13's pretty much all night... I only removed the main air filter but left the gray post- emissions filter still in place. I do plan on going back to Island soon and maybe making my way down to ATCO for some comparison runs? I will post the results as soon as we go.

Ahh, that makes sense now, not only with the split times (which I have re-worked) which are now more in keeping with your vehicle's split time 'signature' if you will, but also with the timing of when you said you removed the filter (only the one) which was near the end of the night. Now your final run among the slips you shared at 10:27PM has the fastest split times across the board.

Max

[BMW in NE]

Originally Posted by CntryClub007

Stock car?

yup completely stock

[Max Well]

Jamoka 3 - after placing your best drag slip time next to ROBNYC's in his new X4 M40i, and seeing how remarkably close they are across the board, I was wondering if you both have had a chance to race side-by-side? Aside from the performance testing it would appear to be a reasonable competition even though the vehicles are markedly different.

[BIGBOYQ]

How do you guys get such times!

I have a Z4 E89 - JB4 Stage 2: With downpipes but unable to get into the 13's
RFT however and have an manual

Tried different techniques

Sport+ Mode
Launch from 1st

1) Launch from 3,000RPM
2) Launch from 1,500RPM

Still have runflats and was constantly spinning wheels through to the gears

[/url]

[CRJdriver]

Originally Posted by WV328

Has anyone tried drag radials? Or even other tires? Seems like the majority of times are with stock tires. I'd love to see what these cars do on a better equipped tire.

I got 285 p zero corsa on the back with 255 front lol. Was actually wondering where I should go in SoCal.

[jamoka3]

[QUOTE=BIGBOYQ;19976202]How do you guys get such times!

I have a Z4 E89 - JB4 Stage 2: With downpipes but unable to get into the 13's
RFT however and have an manual

Tried different techniques

Sport+ Mode
Launch from 1st

1) Launch from 3,000RPM
2) Launch from 1,500RPM

Still have runflats and was constantly spinning wheels through to the gears
.................................................. .................................................. .....................

What are the outside temps when you where running? How many runs have you done / how long are you sitting in the staging lanes? The reason why I ask is because our stock inter-coolers heat soak pretty quickly.
I also noticed your 60' times seem high, are you spinning through first gear? Lack of traction off the line...

[BIGBOYQ]

Originally Posted by BIGBOYQ

How do you guys get such times!

Still have runflats and was constantly spinning wheels through to the gears
.................................................. .................................................. .....................

What are the outside temps when you where running? How many runs have you done / how long are you sitting in the staging lanes? The reason why I ask is because our stock inter-coolers heat soak pretty quickly.
I also noticed your 60' times seem high, are you spinning through first gear? Lack of traction off the line...

You might have hit it on the head.

I was waiting an while, and my Logs files did show my IAT been excessively high - and that I believe has affected my tune.

And I was spinning my wheels through the gears - just about to order some new rubber - M PS4's

I do not want to go down the route of an Wagner intercooler - so just ordered an K&N panel filter.

Next time on the stip -I turn the car off and push it to keep the IAT temperature low.

Enclosed log file on drag and also one from the weekend.

https://farm8.staticflickr.com/7237/...097f2c8a_b.jpg

Logsfiles
15th Was my Drag Logs
22nd Was my test runs yesterday

As you can see my IAT was running 118-140 doing the drag - however powerruns were 94-110

[Max Well]

Originally Posted by BIGBOYQ

How do you guys get such times!

I have a Z4 E89 - JB4 Stage 2: With downpipes but unable to get into the 13's
RFT however and have an manual

Tried different techniques... (edit) l have runflats and was constantly spinning wheels through to the gears
[/url]

BIGBOYQ, I entered your drag slips into my Excel Drag Strip Worksheet and found your split times not that bad. A lot goes into the physics of the first 60 feet, but with a light non-xDr vehicle without tire and track support to enable improved capture of your drivetrain's power down to the surface without slipping it might prove difficult to beat out the xDr folks in that region.

As my interest lies more in the split times beyond the first 60', your vehicle actually didn't run that far off jamoka3 and ROBNYC, and in fact you won one of the split intervals (660'-1000'). As I did on the X4 forum when I compared ROBNYC's and jamoka3's vehicle specs to try to understand why they ran so close in their times, I have now placed your specs next to their data. I don't know what year your vehicle was made, nor do I know the temp when you ran your times, and I don't know if your JB4 Stage 2 is producing the 50HP the specs claim as I never ran the curves for the Z series in my simulations.

Although you have a smaller and lighter vehicle, your coefficient of drag is not as slippery as jamoka3's which may be playing a role at the higher speeds. It could also be the heat (which you both discuss directly above) was decreasing your performance, for unlike ROBNYC's and jamoka3's drag slip documentations over the previous months, your split times did seem to worsen as the night wore on whereas their times usually show a rather consistent improvement during the night.

For three very different vehicles by design, it is quite interesting to me when comparing the split times to see how the power and aerodynamics come together.

Max

[BIGBOYQ]

Thanks I have an scheduled event in a couple of weeks (drag strip) -and have removed my runflats - also have an rolling road event tomorrow.

[vscrch]

Originally Posted by rdsdanny

Man..... Finally, proof that the N20 can make 12's. Your 60ft is pretty solid! I only have the 328i Luxury line w/ sport+ coded in. Launch is an issue since it will go to spin city if I launch at anything over 1500rpm. I am currently at 13.1@106mph .. I am knocking on that 12 second door though. I can't wait to see what you do with more mods!

Any note to what tires you use? and have you thought about setting a first gear boost limiter with the jb4 to drop the wheel spin a bit? I've messed around with it and managed to pull roughly 0.3-0.5 seconds off of my 0-60 runs as measured with an OBDII computer. I'm on the OEM runflats. The difference over 1-2 psi in first gear made a huge difference for me.

[BIGBOYQ]

Well did rolling road and achieved 308Bhp - but suffered heat soak and my AIT temps were high. So tomorrow I am installing a water spray kit - hope this helps. New tyres are Michelin Pilot Sport 4's.

I have noticed though - if I put my foot to the floor the car will only rev upto 3,000 RPM that's the maximum launch rev.

[BIGBOYQ]

Latest run, and some videos



First Run:

Only change been tyres
8 Gallon Fuel
99 Ron
JB4 Map 2
Removed Downpipes
K&N Filter

[Max Well]

BIGBOYQ's latest runs compiled into the Excel Drag Sheet. As 1000' times not provided two of the split intervals cannot be calculated. It seems possible the manual transmission may be contributing to some of the variability between the runs? If one searches 'manual vs auto transmissions' cross-referencing 'drag racing', a number of discussions can be found debating the pros and cons of both types.

[BIGBOYQ]

My fourth run as a poor start and my 5th run was launching in Sport mode not Sport+

[CalCarNut]

Originally Posted by CRJdriver

I got 285 p zero corsa on the back with 255 front lol. Was actually wondering where I should go in SoCal.

Fontana is the only place I think that is running. They have some public dates in July,Aug,Sept and October. Maybe Nov...I think 1 or 2 weekend dates each month. Just google Calif Speedway for the dates.

Irwindale CA had an 1/8mi track..but I'm not sure it's still open.

[Drogon F30]

.. I wish I could spend the $$ on some decent modifications