[catdog]

Cooler and less humid this morning so did another acceleration run in my 335xi (it has one mod: jbs2) and got the 1/4 under 13 seconds and amazing 0-60. See attached side by side data in the graph and you can see that at around the 12s mark the xi is just about faster/even with 997s. I am very happy, launch was from 3500 and eased the clutch no wheelspin (xi ) and took all shifts close to redline this time.

I think this should be vindication of xi system, weight not so much of a penalty and check out that 0-60 time under 4.5 sec....
and 0-100 in 10.37 s


60 ft 1.874s
330 ft 5.392s
1/8 mil 8.308@87.47
1000 ft 10.748s
1/4 mile 12.802@109.76
0-60 4.384s

all with dtc off completely, and ac off, black is xi and red is 997s

[hotrod182]

That is a great time AND MPH. Especially for how heavy the 335xi is. Make sure you can duplicate these time with the GTech on subsequent runs. I usually make 3 runs in a row. If one is way out of line, throw it out. You will know what seems to be right. What was the temp, your elevation? And then finally, at some time or another, take the Gtech to the drag strip and make sure the times match the timing lights. I have done this several times, and was impressed with the accuracy of my unit. I am thinking of getting the GPS based Vbox, but really love the software that comes with the Gtech.

[catdog]

Originally Posted by hotrod182

That is a great time AND MPH. Especially for how heavy the 335xi is. Make sure you can duplicate these time with the GTech on subsequent runs. I usually make 3 runs in a row. If one is way out of line, throw it out. You will know what seems to be right. What was the temp, your elevation? And then finally, at some time or another, take the Gtech to the drag strip and make sure the times match the timing lights. I have done this several times, and was impressed with the accuracy of my unit. I am thinking of getting the GPS baced Vbox, but really love the software that comes with the Gtech.

Hotrod thanks for the feedback, i had another run that was in line with those from yesterday 13.3'ish but i felt i had not launched well it bogged down slightly then i shifted at 6500 thinking it might help but then did this golden run with a great launch and good shifting. It is at about 130 ft elevation, humidity today was around 65% and temp was 74F. It is not quite fair to the 997s because its run was from last night but again the 997s last night was on fumes with <1 gallon in tank and the xi is 3/4 tank full. Does anyone know where the closest drage strip around the Boston area? NH?

Love the GTech too but in my xi it can't seem to capture the rpm while it does that well in the 997s...turned the a/c off cause i read it can interfere still no luck.

Overall i am happy on a number of fronts, because i was worried the xi would be a dog after 60mph and that manual would be impossible to shift well (which is somewhat the case, cdv really interferes with a shift here and there and on 1st/2nd sometimes does not disengage fast enough so you can't power shift and have hear a little synchro grind here and there).

I hope more people give input, seems no one is interested in last night's post...

[hotrod182]

You have great trap speed, especially for an XI. It would be nice if we find out that the XI has less parasitic loss than some of the other AWD systems out there. This morning, I just went out and made 4 runs in a row also. The key in the regular 335i is not to get stuck with your wheels spinning. The 2nd, and worst run was with a little too much wheel spin. However, I am amazed how well I can launch this car without any LSD. You can also see, how consistant the runs really are. I hit one run at over106mph. I thought it was a fluke, so I backed it up with another run at 105.9. This is at 57F ambient. And pretty close to sea level. I like to run 91 octance Union 76 fuel. (are you running 93 octane?) My trans was in DS, one push of the DTC, and launching at only about 1250 RPM compared to your 3000+ RPM. Nevertheless I am impressed with your times with a manual trans. I am amazed at how consistant my runs were considering they were all within minutes of each other. No sitting around here with ice on my manifold, LOL. Even at hot LACR, people were sitting around cooling off their cars, I just went run after run with surprisingly good results. If you can keep putting up consistant 109MPH traps, and then back it up at the track, those are remarkable times, especially the terminal speed. I got a 13.47 at 2700FT LACR 85F+, which is remarkable for a stock 335i.

[bnj]

Well done catdog! You are still in the learning curve of getting good launches consistently. It takes some effort to have both warm tires and cold turbos+IC when launching, and learning to shift at the best spot. Also some experimenting with the launch revs, when not much info for xi's exist. The time is excellent. You can do even better at colder ambient temp and with less fuel.

[catdog]

Originally Posted by bnj

You are still in the learning curve of getting good launches consistently. It takes some effort to have both warm tires and cold turbos+IC when launching. And learning to shift at the best spot. The time is excellent. You can do even better at colder ambient temp and wgth less fuel.

Hotrod and bnj thanks for the feedback; wow the auto 335i is fast, i guess the extra power from the jb overcomes some of the weight penalty. I will try again when temp gets cooler, as far as tires go, i am really not spinning not even the front ones. When i release clutch too quickly the fronts spin a tiny bit but then the engine bogs down, this best run got the right combo of clutch slip and rpm and did not miss shift at 1-2. Auto would be so much more consistent because it would remove the shift variable out of the equation. Anyhow, love the car and thank bmw for bringing something like this back, the 135i is going to be awesome and all i can say is the m3 better be very fast or else at least in this single 1-dimensional area may be humiliated (minus the sexy engine sound and great handling etc.). Darn up to 100 i think my car is probably as fast as my ex-e60M5 which was quite difficult to launch consistently with smg/US launch control.
Good times to live in...

[catdog]

hotrod, your runs are so consistent! one on top of the other, incredible!

[hotrod182]

Like I said, always run at the exact same road, and starting line. That way your results will be comparable. I think so many people were wondering how a modded XI would do, so this is great info that you posted. Were you running 93 octane? We only have 91 out here, but I prefer Union 76.

[catdog]

yes, running shell Vpower 93; i will try different fuels later on

[musc]

great run cat dog. very good trap for the XI.

[hotrod182]

Amazingly, your times are right there with what has been reported on the new E92 M3. 12.8, and <4.4 sec 0-60. After some practice, go verify your times at the drag strip, or at least back up your times with several runs on the GTech. As far as I am concerned, if you can do it consistantly, the GTech's times are propably pretty darn accurate. And how much $ was the JB2?

[catdog]

I guess i should be able to keep up with rs4's huh? except maybe in the dry twisties..

[musc]

Originally Posted by catdog

I guess i should be able to keep up with rs4's huh? except maybe in the dry twisties..

You're right on par with one. Throw on some downpipes and exhaust, and you have a nice edge over one.

[bnj]

...stock 335 can keep up with RS4 in dry twisties according to C&D...

[LACA335i]

335xi sedan

Performance
Base Number of Cylinders: 6 Base Engine Size: 3 liters
Base Engine Type: Inline 6 Horsepower: 300 hp
Max Horsepower: 5800 rpm Torque: 300 ft-lbs.
Max Torque: 1400 rpm Drive Type: AWD
Turning Circle: 38.7 ft.

Exterior
Length: 178.2 in. Width: 71.5 in.
Height: 55.9 in. Wheel Base: 108.7 in.
Curb Weight: 3814 lbs.
Interior
Front Head Room: 38.5 in. Front Shoulder Room: 55.4 in.
Rear Head Room: 37.5 in. Rear Shoulder Room: 55.1 in.
Front Leg Room: 41.5 in. Rear Leg Room: 34.6 in.
Luggage Capacity: 12 cu. ft. Maximum Cargo Capacity: 12 cu. ft.
Maximum Seating: 5

335i sedan
Exterior
Length: 178.2 in. Width: 71.5 in.
Height: 55.9 in. Wheel Base: 108.7 in.
Curb Weight: 3593 lbs. Gross Weight: 4652 lbs.
Interior
Front Head Room: 38.5 in. Front Shoulder Room: 55.4 in.
Rear Head Room: 37.5 in. Rear Shoulder Room: 55.1 in.
Front Leg Room: 41.5 in. Rear Leg Room: 34.6 in.
Luggage Capacity: 12 cu. ft. Maximum Cargo Capacity: 12 cu. ft.
Maximum Seating: 5


2006 Pontiac GTO

Acceleration (0-60 mph): 5.5 sec. Braking Distance (60-0 mph): 128.96 ft.
Base Number of Cylinders: 8 Base Engine Size: 6 liters
Base Engine Type: V8 Horsepower: 400 hp
Max Horsepower: 5200 rpm Torque: 400 ft-lbs.
Max Torque: 4000 rpm Maximum Towing Capacity: 1000 lbs.
Drive Type: RWD Turning Circle: 36.1 ft.



Exterior
Length: 189.8 in. Width: 72.5 in.
Height: 54.9 in. Wheel Base: 109.8 in.
Curb Weight: 3725 lbs.

Interior
Front Head Room: 37.3 in. Front Hip Room: 58 in.
Front Shoulder Room: 59.7 in. Rear Head Room: 37.3 in.
Rear Shoulder Room: 51.7 in. Rear Hip Room: 50.2 in.
Front Leg Room: 42.2 in. Rear Leg Room: 37.1 in.
Luggage Capacity: 7 cu. ft. Maximum Cargo Capacity: 7 cu. ft.
Maximum Seating: 4

[hotrod182]

Originally Posted by LACA335i

335xi sedan
Exterior
Length: 178.2 in. Width: 71.5 in.
Height: 55.9 in. Wheel Base: 108.7 in.
Curb Weight: 3814 lbs.
Interior
Front Head Room: 38.5 in. Front Shoulder Room: 55.4 in.
Rear Head Room: 37.5 in. Rear Shoulder Room: 55.1 in.
Front Leg Room: 41.5 in. Rear Leg Room: 34.6 in.
Luggage Capacity: 12 cu. ft. Maximum Cargo Capacity: 12 cu. ft.
Maximum Seating: 5

335i sedan
Exterior
Length: 178.2 in. Width: 71.5 in.
Height: 55.9 in. Wheel Base: 108.7 in.
Curb Weight: 3593 lbs. Gross Weight: 4652 lbs.
Interior
Front Head Room: 38.5 in. Front Shoulder Room: 55.4 in.
Rear Head Room: 37.5 in. Rear Shoulder Room: 55.1 in.
Front Leg Room: 41.5 in. Rear Leg Room: 34.6 in.
Luggage Capacity: 12 cu. ft. Maximum Cargo Capacity: 12 cu. ft.
Maximum Seating: 5

Heavier than the GTOs, now go race one, and report back to us!
The GTO folks keep saying how their stock cars can break into the 12's. Well so can yours with a $399 modifiication!

[hool97]

GREAT TIMES!!



Not to be negative but just pointing out, in g-tech the 0-60 time does not start until the end of the roll out. You have a 12 inch roll out programmed in the g-tech. The actual time is likely .2 -.3 seconds longer. The 997s would be the same so the compariison still holds. I love my g-tech but I still have not been able to set up rpm detection on the335i.

:rocks:

[hotrod182]

Originally Posted by hool97

GREAT TIMES!!



Not to be negative but just pointing out, in g-tech the 0-60 time does not start until the end of the roll out. You have a 12 inch roll out programmed in the g-tech. The actual time is likely .2 -.3 seconds longer. The 997s would be the same so the compariison still holds. I love my g-tech but I still have not been able to set up rpm detection on the335i.

:rocks:

It won't pick up the RPM accurately from my experience. However, the 0-60 times are right in line with some of the magazine tests. I am pretty sure they use the rollout compensation also. And actually, the GPS system that magazines use don't have resolutions that are less than 12" any ways. I often get 0-60 in the 4.8 second range with both the M3 and 335i, which is right where they should be. Its kind of funny that BMW rated the 335i at around 5.2 seconds? Maybe they leave the traction control on when conducting their tests on the 335i.

[LACA335i]

Originally Posted by hotrod182

Heavier than the GTOs, now go race one, and report back to us!
The GTO folks keep saying how their stock cars can break into the 12's. Well so can yours with a $399 modifiication!

it can get there only there is some modification is done to the car.

[catdog]

Originally Posted by LACA335i

it can get there only there is some modification is done to the car.

Ok, will keep you posted, not many gto's where i live and need help finding a drag strip.

With respect to the 12" rollout, i know, that's why i put a disclaimer on the getch but most have found it very accurate, nonetheless, i feel more confident having another car as baseline. Also the progression of the times when trying both yesterday also made me more confident because of consistency with butt dyno and subjectively how well i had launched or shifted. Point well taken, will report back when i have more data.

[Walked U]

Lol whats up with all the gto comparisons around here?

Did i miss something?

I thought this thread was about 335xi and a 997s.

[LACA335i]

Originally Posted by Walked U

Lol whats up with all the gto comparisons around here?

Did i miss something?

I thought this thread was about 335xi and a 997s.

you are right .. I m so sorry everyone. it was honest mistake. i did not mean to post it the wrong car comparing..I have read the thread, However, my brain telling me something else to type..