[Daniely30]

Originally Posted by Max Well

Thanks for sharing, @Daniely30 . Before I can set up your spreadsheet need some more info. Your garage shows you own a 2017 340i, so not sure what model F97/98 you have? If you don't remember the DA I can figure it out once I see your full slip which shows location, date and time. And not sure if you just have a downpipe alone or also a tune (are you St1 or St2)? As there are so many combinations of mods gotta depend on Members to indicate what category I should place their data. Not a huge deal if you can't remember your tire psi, but are the wheels stock or ?

Originally Posted by Max Well

Thanks for sharing, @Daniely30 . Before I can set up your spreadsheet need some more info. Your garage shows you own a 2017 340i, so not sure what model F97/98 you have? If you don't remember the DA I can figure it out once I see your full slip which shows location, date and time. And not sure if you just have a downpipe alone or also a tune (are you St1 or St2)? As there are so many combinations of mods gotta depend on Members to indicate what category I should place their data. Not a huge deal if you can't remember your tire psi, but are the wheels stock or ?

i got to change the garage vehicle.
its a 2020 x4m comp. downpipes, stage 2, 93pump. wheels stock. 21inch conti. psi was 38.it was august 14th, atco dragway, nj

[AlexFL]

Originally Posted by floating.spirit

Can anyone here speak to the longevity of their engine with a fairly low level tune on it? I know you got to pay to play but just wondering if anyone's got experience with a long-term tune. I'm considering BM3 stage 1. Thanks

My friends told me the E30 map is safer

[Max Well]

Originally Posted by Daniely30

i got to change the garage vehicle.
its a 2020 x4m comp. downpipes, stage 2, 93pump. wheels stock. 21inch conti. psi was 38.it was august 14th, atco dragway, nj

Here's your spreadsheet data, Daniely30 , and the updated Leaderboard which now includes the first St2 (without a tune?) data shared, and you're also the first F98 to share a formal 1/4 mile slip.

Without an image of your full slip (which again I respectfully ask those contributing to provide) it took time for me to guess a time you would have made that run on that Friday the 14th. Atco starts their Friday Test-N-Tunes at 5PM it appears, and since we at least have your Round # on the portion of the slip you provided I was able to estimate a time to be able to look up the weather data and calculate an est'd DA.

Interesting data if I have understood your mods correctly, as it does show what downpipes alone (without a tune?) might add to times c/w at least a stock X3MC.

[p2uned]

[IMG][/IMG]

P2uned e50 tune with 3.5 DPs

[Max Well]

Originally Posted by p2uned

P2uned e50 tune with 3.5 DPs

Excellent numbers, p2uned - look forward to seeing your formal 1/4 mile Drag Strip slips to add to the Leaderboard when you get a chance to run.

[p2uned]

Originally Posted by Max Well

Excellent numbers, p2uned - look forward to seeing your formal 1/4 mile Drag Strip slips to add to the Leaderboard when you get a chance to run.

Weather permitting. It should be this weekend

[forza1976]

Some new data.

Pueblo Motorsports Park 9/11/2020
Slip and dragy screenshot.

91, stock, spare and tools out. 3/8ths tank. 35psi rears, 33psi fronts (21" contis). 4900' track elevation. ~7000 da.

[Max Well]

Originally Posted by forza1976

Some new data. Pueblo Motorsports Park 9/11/2020 Slip and dragy screenshot. Details: 91, stock, spare and tools out. 3/8ths tank. 35psi rears, 33psi fronts (21" contis). 4900' track elevation. ~7000 da.

Remarkable numbers with that DA, forza1976, esp with only 91 Octane - great job! Here are the updated spreadsheets (your personal runs and the updated Leaderboard for SC group). And thanks for providing the details necessary for everyone to use your data as reference!

[forza1976]

Originally Posted by Max Well

Remarkable numbers with that DA, forza1976, esp with only 91 Octane - great job! Here are the updated spreadsheets (your personal runs and the updated Leaderboard for SC group). And thanks for providing the details necessary for everyone to use your data as reference!

Thank you Max Well

It was awesome to finally get the right launch control experience. 900 feet less physical elevation and cooler temps did the trick to get some times. I had five other 12.0x runs between 114 and 115mph. And pulled two 1.77x 60'.

Great evening with my buddies, even if a 112 mile drive each way there and back.

[p2uned]

Full interior
E50
Eventuri intake
P2uned tune
P2uned 3.5 DPs

79 degrees
2000da

[forza1976]

Originally Posted by p2uned

Full interior
E50
Eventuri intake
P2uned tune
P2uned 3.5 DPs

79 degrees

Wow. Nice!

[Max Well]

Originally Posted by p2uned

Full interior
E50
Eventuri intake
P2uned tune
P2uned 3.5 DPs

79 degrees
2000da

Good run - thanks for sharing. I've got your numbers entered on the Leaderboard and your own personal sheet, but I need a few more details to complete your data set before I can finalize. Not sure what 'full interior' is (I don't have a spare but I have a full interior, so not sure if you're just saying you have the spare and didn't remove it)? I can see in the image it says Atco, but full slip image still provides the best documentation for reference as it also includes date/time.

All of these details allow others to compare how mods, fuel octane, tire pressure, tire size, weight, and documented DA may affect their own results.

[p2uned]

Originally Posted by Max Well

Good run - thanks for sharing. I've got your numbers entered on the Leaderboard and your own personal sheet, but I need a few more details to complete your data set before I can finalize. Not sure what 'full interior' is (I don't have a spare but I have a full interior, so not sure if you're just saying you have the spare and didn't remove it)? I can see in the image it says Atco, but full slip image still provides the best documentation for reference as it also includes date/time.

All of these details allow others to compare how mods, fuel octane, tire pressure, tire size, weight, and documented DA may affect their own results.

Hmmm ok

1/4 tank of gas
Full full interior. Nothing removed
E50 pump93/e85
Stock 21" tires (not sure exact size, I forgot)
150lb driver
No sun roof

[Max Well]

A new Leader has emerged, congratulations p2uned

[Max Well]

Now that we're starting to get data contributions from different vehicle configurations, the opportunity to analyze effects of these various mods and tunes arises. Although it's a really small sample size, I wanted to see quantitation of gains in time/speed of 1/4 mile with or without downpipe and same with the E50 tune.

Seems pretty consistent (in this very small set) that downpipe improves time by roughly 0.2 sec and speed by 4 mph, and E50 tune by 0.8 sec and speed by 10 mph.

Would be interesting to see the difference (if any) with lightweight wheels, as theoretically at least they should help lower unsprung weight and rotational mass/inertia. And I hope to test effects of further lowering tire psi down to 32F/32R as well as 32F/30R, in addition to octane 93 vs 100 in the future.

Thanks again to those contributing.

[GT500R]

Max you might want to check that P2 DA ...is no where near 2000 at ATCO in Sept. Just tried mine through the website and it is very close to what I saw the day of.

https://airdensityonline.com/track-h...ay/2020-09-12/

[Max Well]

Originally Posted by GT500R

Max you might want to check that P2 DA ...is no where near 2000 at ATCO in Sept...

Without full images of slips (with date, time, location, and track name), it's difficult to confirm a reported DA. This is why I keep encouraging everyone to share all pertinent data when submitting results...

[forza1976]

Everyone should post your time slips on Dragtimes

http://www.dragtimes.com/BMW--X3-M-Drag-Racing.html

[Daniely30]

https://www.bootmod3.net/log?id=5f40...0b4312bb3d1382

[AlexFL]

Originally Posted by p2uned

[IMG][/IMG]

P2uned e50 tune with 3.5 DPs

p2uned, do you run the 265/295 tires setup?

[p2uned]

Originally Posted by AlexFL

p2uned, do you run the 265/295 tires setup?

I use the stock tires 21" conti

[AlexFL]

Originally Posted by p2uned

I use the stock tires 21" conti

damn, I have yet to see good drag strip times with the 265/295 setup.