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      04-28-2012, 08:01 AM   #1
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1/4 Mile Track results X5 50 Dinan Stage II

Taking my 800 mile month old X5 50 M Sport package with Dinan Stage II to the track this afternoon. Absolutely perfect temp for it since it should be in the 40's.

I'm somewhat disappointed at the 1/4 times posted here or anywhere for that matter. So if you have had your 50 out and made some runs, post some times.

I installed the Dinan on a new vehicle, so there was, and actually still is, some annoying downshifting happening when rolling to a stop. Dinan says this will ease after 1,000 miles of data gathering and adaption to my driving.

The car feels extremely quick for the first two gears but then seems to slow. I'll see based on the 1/8 and 1/4 times if this is true. I may dyno it this weekend as well given the opportunity.

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      04-28-2012, 08:39 AM   #2
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These guys got a 12.8@108 with their tune. I'd hope for similar numbers.



The feel of noticeable slowing after the first two gears is true for the the X5M as well, due to weight, frontal area, and drag catching up with it. It's just the nature of the beast. It's fastest off the line due to gearing and traction. The X5M does 0-60 in 4 seconds vs. 5.1 for the 550i, but the 60-130 times are identical, and after that the M fades. That's a lot of frontal area to push through the air at 100+ mph.
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      04-28-2012, 02:16 PM   #3
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Track update

Sport mode letting BMW shift - 13.1 at 104.6

manual hitting paddle at 6200 12.90 at 105.8

Thinking of short shifting to keep torque higher.

I was hoping to run in the 12.7-12.8 range

Perhaps shifting differently/smarter will get some better times.

Think best will be a 12.7 or so. 1.85 60 ft*

Thanks for comment about drag, forgot I was in an suv.
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      04-28-2012, 02:39 PM   #4
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Last run of day

12.90 at 105.6 1.90 60ft
Hitting paddle at 6200, brake torque to slip.
Seems pretty consistent at the 105-6 mph.
I think that's all she has 53 degree day.

Bone stock with Dinan Stage II

Any airboxes I should be removing? Tires were left as dealer gave them to me.

Thanks in advance for any advice.

Happy Saturday to all
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      04-28-2012, 02:54 PM   #5
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Did you get a 0-60 time?
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      04-28-2012, 03:11 PM   #6
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No

No sorry. Just 60 foot I'll look for an app.
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      04-28-2012, 06:53 PM   #7
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Quote:
Originally Posted by Spdgtkt View Post
12.90 at 105.6 1.90 60ft
Hitting paddle at 6200, brake torque to slip.
Seems pretty consistent at the 105-6 mph.
I think that's all she has 53 degree day.

Bone stock with Dinan Stage II

Any airboxes I should be removing? Tires were left as dealer gave them to me.

Thanks in advance for any advice.

Happy Saturday to all
Too me, those are great times for an SUV... Plus not even the M version.
Those numbers would run away from a '70 Hemi Cuda bone stock from the 1970 showroom. Heck, that will even take an E39 M5 thru the 1/4, but then the M5 will overtake it due to the lighter weight.
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      04-28-2012, 06:53 PM   #8
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Switching I non run flats will cut a few tenths of a sec off. Drag radials even more.
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      04-28-2012, 06:59 PM   #9
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Good times. I ran a 12.8@108 stock in my X5M timed by VBox, but that was on an unprepared track in 90+ degree heat.

I think the 50i will run best times with brake torquing to around 3000 rpm in manual mode and letting the transmission shift itself, but short-shifting it is worth a shot to keep the torque in the peak.

Airbox mods are definitely going to be helpful. I'd bet that just removing the carbon filters would be worth 15 or more hp. A switch to an M-style airbox would make a big difference.
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      04-28-2012, 09:13 PM   #10
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Btw how did u get stage II software? It's not listed on Dinans site
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      04-28-2012, 10:05 PM   #11
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Stage II

I had stage II installed when I took delivery with zero miles. Engineering at Dinan said it wouldn't be an issue. I believe it was released on March 19.

I'm happy with it.

Scott from Dinan sent me the following info:

Peak HP
501 HP @ 5000 RPM
Peak Torque
580 FT-LBS @ 3500 RPM
Stage 2 software is $3499.00

Stage 2 only makes a small increase in terms of peak horsepower and torque over Stage 1. The big difference is the amount of boost we are able to apply on the Stage 2 version in first and second gears.* The Stage 2 software will provide substantially faster acceleration from a dead stop and lower rpm.* Stage 1 is great, but Stage 2 is noticeably faster.
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      04-28-2012, 10:20 PM   #12
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I wonder if it's available for the M
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      04-30-2012, 11:12 AM   #13
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Nice times!
I posted at 12.69 in a stock 2011 X5M last week at 109.5 mph. About 80 degrees out.
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      04-30-2012, 03:51 PM   #14
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Seems to me personally that Dinan inflates the numbers or perhaps thats the max in 1st or 2nd gear. I would have expected to see the mph higher of in fact the 50i had just 40hp less but 80lb ft tq more than stock x5m. After all the truck is 5700 +\- with me in it.

I've written to Dinan asking for a boost chart by rpm as well as i have heard that the flash pulls boost substantially at higher rpms especially near shift points. Nothing yet.

I may dyno the truck in the coming weeks if the local shop can get it on.

Anyone try the Cobb tune?

Happy 1/4's to all.
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      04-30-2012, 06:03 PM   #15
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I haven't heard that about the Dinan tune...let us know what they say.

I think your times compare pretty favorably with a stock X5M...keep in mind that the M has a lot of other things besides overall hp and tq that help it go fast. The launch control alone is probably worth a few tenths and mph in a 1/4 mi run. And during a launch control run the shifts are much faster than normal, and faster than those that are set up on the 8-speed with Dinan.

I agree that with the tune the 50i doesn't feel as much faster at higher speeds as it does at lower speeds, but I think that besides the drag/frontal area/weight issue given that this is an SUV, it is related to 3 things:

- One is airflow. Peak torque is low in the power band and then fades, and the hp really flattens at the top of the power band as the engine runs out of air. An intake is supposedly in the works which should help a lot. In the mean time you can try taking out the charcoal filters which will probably net you 10-15 hp up top. But remember this engine wasn't designed to be a high-rpm screamer.

- The second is the transmission ratios, which are probably less aggressive in 3-5th than in the M and not designed to keep the power in the modified power band that Dinan tuning gives.

- And the third is that the off the line performance is so much better than stock due to loss of that laggy feeling/improved throttle response that everything else feels less significant in comparison.

Overall a good step in the right direction...hopefully later tunes will address and improve upon what they have already done.

One last thing...your engine isn't even broken in yet. It will loosen up more as time goes on and will feel faster as it does. I noticed a significant difference from new to the 3000 miles I currently have on it.
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      04-30-2012, 07:58 PM   #16
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All great points but in the end it has the most to do with the drag/weight.. It's got the aerodynamics of a pig.

The M is a beast until u hit 100 and then it doesn't pull as fast as a car with that power would.

I heard someone say that they have seen tuned x5m's with non rft's running mid 11s. Anyone else see that?
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      04-30-2012, 09:18 PM   #17
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get some downpipes on that beast
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      05-01-2012, 01:33 PM   #18
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Quote:
Originally Posted by GmoneyLI
All great points but in the end it has the most to do with the drag/weight.. It's got the aerodynamics of a pig.

The M is a beast until u hit 100 and then it doesn't pull as fast as a car with that power would.

I heard someone say that they have seen tuned x5m's with non rft's running mid 11s. Anyone else see that?
I have an X5M with non-rfts, gthaus exhaust and velos tune running 11.8s
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      05-01-2012, 02:09 PM   #19
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Quote:
Originally Posted by exfyvem
Quote:
Originally Posted by GmoneyLI
All great points but in the end it has the most to do with the drag/weight.. It's got the aerodynamics of a pig.

The M is a beast until u hit 100 and then it doesn't pull as fast as a car with that power would.

I heard someone say that they have seen tuned x5m's with non rft's running mid 11s. Anyone else see that?
I have an X5M with non-rfts, gthaus exhaust and velos tune running 11.8s
Nice! I'm glad to hear it doesn't take much more for me. How much more power is ur tune making? Tune only
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      05-01-2012, 04:32 PM   #20
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12.58 was my best time when I went to the track with my 19" winter tires installed.
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      05-01-2012, 04:34 PM   #21
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Quote:
Originally Posted by Northern X5M View Post
12.58 was my best time when I went to the track with my 19" winter tires installed.
Wow! What was the temperature out??
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      05-01-2012, 05:33 PM   #22
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Quote:
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Wow! What was the temperature out??
Pretty cool. Mid May, I'd say in the low-mid teens Celsius. I will try and find the time slip.
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