[bmwzimmer]

I think you're just good at modulating the throttle... So good you don't even know you're good at it.

The math doesn't lie

365 ft-lbs + RFT tires + 1st gear + Flooring the throttle = Smoke

[benMW holla]

Xdrive differs from AWD
if i am wrong PLEASE correct me...
it was my understanding that a 335xi sedan (which i am ordering for april delivery) will be 99% rear wheel drive until the rear tires slip then power will transfer the the front. does anyone have an idea what would happen if traction control was turned off?
comments, input, corrections, please.

im going to buy a calender and start counting down the days!!

[adriver]

Originally Posted by T Bone

I called the Vishnu guys the night I order my 335xi and they said that the current unit should work but won't know until a customer brings in his car.

My car is not here til May so I hope someone with an XI will visit Vishnu.

The XI is 220 pounds heavier than the RWD.....does anyone know the effect of an extra 100 pounds on E/T and Trapspeeds?

1/4 mile and trap speeds, IMO will be 12s stock, and low 12s with procede. I understand the 200 lbs heavier. Im basing this off of a much better available launch, and the fact that the xi has a 3.46 rear diff while the RWD version has a 3.08.
You may do well on the track, but good luck getting it over the electronically limited 130 mph on the other track.

[Garissimo]

Originally Posted by adriver

1/4 mile and trap speeds, IMO will be 12s stock, and low 12s with procede. I understand the 200 lbs heavier. Im basing this off of a much better available launch, and the fact that the xi has a 3.46 rear diff while the RWD version has a 3.08.
You may do well on the track, but good luck getting it over the electronically limited 130 mph on the other track.

With all due respect, there's zero chance the 335xi is going to bust into the 12s stock. Think 13.5 @ 102mph stock. PROcede...probably 12.9 @ 107mph.

[Longboarder]

Originally Posted by bmwzimmer

I think you're just good at modulating the throttle... So good you don't even know you're good at it.

The math doesn't lie

365 ft-lbs + RFT tires + 1st gear + Flooring the throttle = Smoke

You are right that throttle modulation is the key. I romped on in first gear yesterday purposely without any throttle modulation and the DSC/DTC was flickering and the car lost a lot of power. From a stop or 1st gear roll on, I typically give it 3/4 throttle and modulate for a split sec until everything hooks then it hits the floor.

[T Bone]

Originally Posted by Garissimo

With all due respect, there's zero chance the 335xi is going to bust into the 12s stock. Think 13.5 @ 102mph stock. PROcede...probably 12.9 @ 107mph.

I agree.... I am hoping to crack 13 and get into high 12's with the 335xi. I think low 12's are out of reach unless you can get a bigger turbo. This is M5 / M6 territory.

I didn't know the XI had a shorter rear diff ratio.....where can I get some data on this?

[bnj]

Originally Posted by teknochild

the 335xi will have the benfit of an easier launch, but in a longer race the added drivetrain loss will eat the power from the engine

You are right. However, if we are talking about a longer race, power is nothing without control. In power levels beynd 300hp on average driving surfaces and conditions, you get faster to point b, the more you have traction.

[DrDomer]

Umm... Compare the specs for every xi to every i. All 0-60 times quoted by BMW for xi are slower than i times. Why would the 335i be any different? I don't buy the issue of getting the power to the ground is better in the 335xi than 335i (without the Procede). So if the car is stock, I think the 335i would be faster based on above. Now... Having said that... Throw in the Procede and 0-60 times might improve in the xi if you can launch better. I don't have the Procede yet, but everyone says launching the MT with Procede can be a little tricky with all that torque. Still, like above comments, overall acceleration still should be better in 335i due to less drivetrain loss. Also... I would be very worried about the tranny in the xi with all that torque. Shiv mentioned the same thing in another thread. If you don't have much wheelspin, all that force is applied somewhere if not dissipated with wheelspin.

[T Bone]

Originally Posted by DrDomer

Umm... Compare the specs for every xi to every i. All 0-60 times quoted by BMW for xi are slower than i times. Why would the 335i be any different? I don't buy the issue of getting the power to the ground is better in the 335xi than 335i (without the Procede). So if the car is stock, I think the 335i would be faster based on above. Now... Having said that... Throw in the Procede and 0-60 times might improve in the xi if you can launch better. I don't have the Procede yet, but everyone says launching the MT with Procede can be a little tricky with all that torque. Still, like above comments, overall acceleration still should be better in 335i due to less drivetrain loss. Also... I would be very worried about the tranny in the xi with all that torque. Shiv mentioned the same thing in another thread. If you don't have much wheelspin, all that force is applied somewhere if not dissipated with wheelspin.

On the BMW salessheets, the 0-60 time for the 335i sedan is 5.7 seconds and 335xi is 5.6 seconds.

Unlike Audi's Quattro, the X-drive doesn't engage the front wheels unless it detects rear wheel spin. I imagine you will be able to spin the front tires + rear tires on launch with the Xi and the Procede....

[bnj]

Acceleration time can be divided into traction limited and power limited parts. Models with low power are faster in rwd form as they are mainly (or only) in power limited part. Increasing power awd will be faster at some point.

[DrDomer]

Originally Posted by T Bone

On the BMW salessheets, the 0-60 time for the 335i sedan is 5.7 seconds and 335xi is 5.6 seconds.

Unlike Audi's Quattro, the X-drive doesn't engage the front wheels unless it detects rear wheel spin. I imagine you will be able to spin the front tires + rear tires on launch with the Xi and the Procede....

I've never seen the 335i 0-60 times quoted at 5.7. What's your source? The real point being I think if you want true performance go with the 335i. If you live in Canada or upstate New York with heavy snow.. get a 335xi.

http://www.bmwusa.com/vehicles/3/335icoupe/techdata.htm

The 335i times from BMW usa. Not 5.7 FWIW.

[T Bone]

Originally Posted by DrDomer

I've never seen the 335i 0-60 times quoted at 5.7. What's your source? The real point being I think if you want true performance go with the 335i. If you live in Canada or upstate New York with heavy snow.. get a 335xi.

http://www.bmwusa.com/vehicles/3/335icoupe/techdata.htm

The 335i times from BMW usa. Not 5.7 FWIW.

See and believe my friend....bottom right. I don't know where this comes from..... It is not the absolute value that is interesting. BMW is saying the xi is faster than the i from 0-60.

[uhaulball]

Originally Posted by Driver72

There is no speculation there.
There is much more power lost to the wheels in an AWD drivetrain.
Not too mention the added weight to the car.

Both will conspire to "rob" power and slow the car down as speeds climb.

There is much more power lost to the wheels in an AWD drivetrain.
> Whether or not there is major loss of power to wheels, you get more "bang for your buck" with that power with the better traction

Not too mention the added weight to the car.
> 100lb difference. versus wheel spin difference

All in all, i dont see it being much of a difference in real world performance, especially with the TT engine.

[uhaulball]

Originally Posted by Longboarder

I have PROceed 6MT sedan and have no problem launching the car hard from a dead stop or mashing the throttle on a 1st gear roll-ons with limited or no wheel spin....and I haven't even touched the DTC/DSC button!

I'm in SoCal and the weather is temperate. I think the people who can't control the wheel spin on their stock 335's are probably in much colder weather and I think it affecting traction for our run-flats.

No doubt the 335xi would make it easy to hook up from a stop, even in inclement whether. However a decent driver and temperate whether, I think the RWD models are capable of sub 2.0 60 foot times.

if you didnt touch the DSC, you didnt turn it off, therefore you are not launching as fast as you can. DSC is ON by default, NOT off...

i dont think you are familiar with the DSC yet. when you floor it, the DSC light shouldnt flash because it babysits your throttle and doesnt allow for so much torque to go to your wheels because it knows it will cause spin. DSC doesnt notify you of when it cuts off power... it notifies when there is a sudden slippage under the wheel and they cut power dramatically.

[T Bone]

Originally Posted by uhaulball

There is much more power lost to the wheels in an AWD drivetrain.
> Whether or not there is major loss of power to wheels, you get more "bang for your buck" with that power with the better traction

Not too mention the added weight to the car.
> 100lb difference. versus wheel spin difference

All in all, i dont see it being much of a difference in real world performance, especially with the TT engine.

Since we are speculating here....

Look at the datasheet above. The xi is 100 kg (220 pounds) heavier than the regular i. With better traction, BMW is claiming the xi is faster than the i for 0-100 km/h.

I think they will have the same 1/4 mile times but I think the i will have a higher trap speed which means the i will walk the xi after the 1/4 mile.

Just speculation.

[uhaulball]

Originally Posted by T Bone

Since we are speculating here....

Look at the datasheet above. The xi is 100 kg (220 pounds) heavier than the regular i. With better traction, BMW is claiming the xi is faster than the i for 0-100 km/h.

I think they will have the same 1/4 mile times but I think the i will have a higher trap speed which means the i will walk the xi after the 1/4 mile.

Just speculation.

oops.. i misread 100kg for lbs.

I agree, the I will probably get ahead of the XI eventually, but im all about the 0-60 There are just much more situations where a faster 0-60 is more beneficial than a high mph.

[DrDomer]

Well... I guess we'll see. That is good info. I guess the the 0-100Km/h time should be slower than what I was quoting. That's the difference we're quibbling about. Do you have any concerns about putting a Procede on an xi?

[T Bone]

Originally Posted by DrDomer

Well... I guess we'll see. That is good info. I guess the the 0-100Km/h time should be slower than what I was quoting. That's the difference we're quibbling about. Do you have any concerns about putting a Procede on an xi?

It is really academic the performance....they are both fast. I need to replace my Audi and this is the best AWD car that I can find. Trust me I was looking at everything from the X5 to the Cherokee SRT8 but I am happy with the 335xi.

I called Vishnu the night I ordered the car, they have not tested against it yet since the car hasn't been released but this should be fine.

I spoke to my dealer who is going to refuse to warranty the engine if I put the Vishnu in there. I have no concerns other than not having a warranty. I will drive it for a couple of months and see if I am happy, if not, damn the torpedos, I will get the Vishnu.

I have a bit of a power bug right now that I am trying to cure

[uhaulball]

Originally Posted by T Bone

It is really academic the performance....they are both fast. I need to replace my Audi and this is the best AWD car that I can find. Trust me I was looking at everything from the X5 to the Cherokee SRT8 but I am happy with the 335xi.

I called Vishnu the night I ordered the car, they have not tested against it yet since the car hasn't been released but this should be fine.

I spoke to my dealer who is going to refuse to warranty the engine if I put the Vishnu in there. I have no concerns other than not having a warranty. I will drive it for a couple of months and see if I am happy, if not, damn the torpedos, I will get the Vishnu.

I have a bit of a power bug right now that I am trying to cure

u have an m6 too?? id get the cherokee srt8 then. id rather have 1 hot coupe and 1 hot suv than 2 hot coupes. unless u really hate the driving position of suvs.

[T Bone]

Originally Posted by uhaulball

u have an m6 too?? id get the cherokee srt8 then. id rather have 1 hot coupe and 1 hot suv than 2 hot coupes. unless u really hate the driving position of suvs.

Oh man....I did my search for about a month and a half. The Cherokee drove like crap. You ought to know, the BMWs handle well in addition to have some grunt.

The Cherokee accelerated well but it handled like a pig.....can't do it. The X5 drove well but was quite boring. I looked at an A4 / S4....no more Audi's for this cat.

I ordered a sedan not a coupe. The 335xi coupe is available in September 2007.

[DrDomer]

Originally Posted by T Bone

I spoke to my dealer who is going to refuse to warranty the engine if I put the Vishnu in there. I have no concerns other than not having a warranty.

Do you have an ethical dilemma about having the Procede and not telling your dealer? My Procede is 5 weeks away. My salesman is cool about it. Of course my service manager won't know. I will unistall it every time I go in for service.

[T Bone]

Originally Posted by DrDomer

Do you have an ethical dilemma about having the Procede and not telling your dealer? My Procede is 5 weeks away. My salesman is cool about it. Of course my service manager won't know. I will unistall it every time I go in for service.

I am friends with the guys in service and parts so I wouldn't want them burned for my lust for horsepower....

We will see.....when I test drove the 335i, it was quick enough for me (but not really)....

How many miles do you have on your car? Even if I were to get the procede, it would be towards September / October 2007 when I can get 3000 miles into the car.