[mose121]

wow...I can't wait to see what a full exhaust with intake will do on the n54's.

[BMWPower06]

Originally Posted by shiv@vishnu

No doubt the 335Xi will be a good platform to tune. But unless you drive in inclimate weather often, I don't see the reason to add all the extra weight to the car. In the case of the Evo and Suby, AWD is used to improve the handling and balance of an inherenly imbalanced layout. In the case of the well-balanced 3 series, AWD just makes things work. Unless you live in the snow belt, of course, where the need for max traction takes precidence over handling balance.

cheers,
shiv

good to hear, u sound confident that the RWD platform can handle all the power, i assume that after you get used to the power, throttle and clutch management will be key in putting all the power down

[SkipSauls]

My 335i hasn't been run below about 5000' and the car is a monster, so I can only imagine what those of you down at sea level must be experiencing!

[bnj]

Bmw has more than 500 hp at e60 M5. I drove e39 several years at 400hp. New tires are stickier than those I had a couple of years back. To conclude, stage1 335i is not too much power (There is no such a thing as "too much power").

[CASHBY]

Originally Posted by SewickleyBMW

wow...I can't wait to see what a full exhaust with intake will do on the n54's.

Exhaust will help a lot....however stock intake is more than enough.

[bmwzimmer]

Originally Posted by shiv@vishnu

I don't know if it was 4000' (the Grapevine in socal), but it turns out the factory ECU doesn't fully compensate for a decrease in atmospheric pressure. In other words, the car ran lower absolute manifold pressure at high altitude. This may be something that we can fix. However, we do need to be realistic with turbo limitations before asking it to run full manifold pressure at 5000' above sea level. Especially at the upper reaches of the RPM band where the turbos begin to run out of breathe. I'll try to take some more datalogs tomorrow when I drive through the Grapevine again. It was closed today due to road ice hazards. Hopefully it'll be negotiable tomorrow... fingers crossed.
-shiv

Hopefully you can iron everything out soon. If all goes well, are you still planning to ship by the end of the month?

Also, how have your tires held up after 10K miles or so with the XEDE? Are you still on the first set? If you are on your 2nd set, did you stick with the RFT's or did you get regular Non-RFT tires?

Just wondering how long the stock tires will last driving around town with the XEDE... If they have no thread left at 10K, might as well get regular tires and save a ton of $$ down the road.

[jayjay]

Any concerns about the stock clutch capability to handle all this torque?

[CASHBY]

the clutch isnt going to last long...

there is a company that we are working with right now to get some clutches made. basicly the same people that make the southbend clutches.

[herbz]

Originally Posted by bnj

Bmw has more than 500 hp at e60 M5. I drove e39 several years at 400hp. New tires are stickier than those I had a couple of years back. To conclude, stage1 335i is not too much power (There is no such a thing as "too much power").

actually a stage 1 335i should be faster than an e39 m5.

[CASHBY]

A stage one will destroy an e39 m5.... here is a link to a guy with a e39 M5 that i raced.... he even posted that at some points he couldnt keep up with me.

we ended up talking and he made 319 to the wheels with some mods done. stage one will kill that car.

here is the link to him posting it on the m5boards.

http://www.m5board.com/vbulletin/showthread.php?t=87828

[BMWPower06]

Originally Posted by CEA 3

A stage one will destroy an e39 m5.... here is a link to a guy with a e39 M5 that i raced.... he even posted that at some points he couldnt keep up with me.

we ended up talking and he made 319 to the wheels with some mods done. stage one will kill that car.

here is the link to him posting it on the m5boards.

http://www.m5board.com/vbulletin/showthread.php?t=87828

stock for stock arent the two cars damn near identical in performance? with a chip its no chance

[CASHBY]

Originally Posted by BMWPower06

stock for stock arent the two cars damn near identical in performance? with a chip its no chance

exactly!!!!!

the new m5 is a different story...but with what shiv and the guys are doing latley it is not to far out of reach.

[bronco]

I'd still pipck up the M5...IMO...after all it an M

[gashero]

M5 are a heavy beast. Stock for stock the 335i will blow the door of the E39 M5. Now with the piggyback, we are in the new M5 territorry as far as performance in straight line racing. On the track, it will be in the rear view mirror all day long.

[Walked U]

Originally Posted by CEA 3

exactly!!!!!

the new m5 is a different story...but with what shiv and the guys are doing latley it is not to far out of reach.

Hey charlie what was the color of that m5 you raced? I always see a black m5 around the irvine area.

[bmwzimmer]

In a straight line, the cars will be pretty close but I don't think it will be as fast as an E60 M5. I'm thinking 12.6-12.8 quarter mile time. M5's will get 12.4-12.6.
On the track however, you may get some overheating issues so I wouldn't even track it until we know for sure there will be no problems... M5's have a LSD, sportier suspension and brakes that don't fade as fast as the 335's so I'd give the nod to the M5.

[BMWPower06]

i say with chip, turbo back, and intercooler the 335 will be of equal or greater performance than the E60 M5, its already running more torque than the M5 with only xede, problem will be finding a way to launch the car and put all the power down

[sflgator]

Originally Posted by bmwzimmer

In a straight line, the cars will be pretty close but I don't think it will be as fast as an E60 M5. I'm thinking 12.6-12.8 quarter mile time. M5's will get 12.4-12.6.
On the track however, you may get some overheating issues so I wouldn't even track it until we know for sure there will be no problems... M5's have a LSD, sportier suspension and brakes that don't fade as fast as the 335's so I'd give the nod to the M5.

...and what is your basis for those numbers? Although some ppl dispute it, I G-Tech'd my Xede-equipped 335i (initial beta tester Stage 0 -- Xede-only, stock exhaust) and got 12.44 sec. 1/4mi...my results are posted in another thread. My Xede-equipped car dyno'd at 322WHP and 378 lb.-ft. RWTQ! It appears Shiv's newer Xede version will show even better numbers!

Now that Shiv has improved the Xede even further (and extracted even more HP and TQ with the Xede), I have no doubt that with the final version Xede Stage 0, an Xede-equipped 335i should be able to run the 1/4mi. in 12.4 sec. or most likely faster, probably ~ 12.2 sec. with a trap speed ~ 115-118mph.

[imsambeen]

Kujo from this forum has invited me to test my car in a 1/4 mile and 0-60 run with his GPS timer. Hope to visit him after Shiv updates my software.
Supposedly the GPS is more accurate. Lets see if we can blow the competitions away.

[suzaku]

Ok these numbers are starting to get scary. over 400bhp already?

Do you think it is possible to hit 400hp at the wheels with simple bolt ons?

[Insider]

Originally Posted by shiv@vishnu

I don't know if it was 4000' (the Grapevine in socal), but it turns out the factory ECU doesn't fully compensate for a decrease in atmospheric pressure. In other words, the car ran lower absolute manifold pressure at high altitude. This may be something that we can fix. However, we do need to be realistic with turbo limitations before asking it to run full manifold pressure at 5000' above sea level. Especially at the upper reaches of the RPM band where the turbos begin to run out of breathe. I'll try to take some more datalogs tomorrow when I drive through the Grapevine again. It was closed today due to road ice hazards. Hopefully it'll be negotiable tomorrow... fingers crossed.
-shiv

Hi Shiv,

Looking at this article http://www.eurotuner.com:80/featured...mw_335i_coupe/ by BMW engineer Udo Lindner who was responsible for the 335i turbo engine. He says this: "We have two Mitsubishi turbos running at 0.6bar (8.8psi). These can boost to 0.8bar to compensate for altitude using the two electronically-controlled wastegates," Udo explained.

Based on that the car should be able to maintain full boost up to about 7,000ft. Another member on here did a test with the GTech 0-60 at over 5,000' above sea level and got 0-60 at 4.87. So I think the car is maintaining absolute boost pressure at altitude when stock. However, it sounds like the Xede is not. Would you agree?

[bmwzimmer]

I have no real data... Nobody does. I'm just using my reasoning to guess those numbers..... Here's how I see it and let me know if this makes sense...

Peak torque at 405 sounds great but all the torque is at 2500-4000rpms. This really makes the car feel quick on the road which makes you think it's super fast. When you drag race, your RPMs go up to 7K in first gear and when you shift to 2nd, it starts at something like 5-5.5K rpm. Same with 3rd gear. First gear you'll be struggling with traction so you won't see that much torqe transfered to the ground unless you have some nice slicks on the car.

Take a piece of paper and block off the whole left side of the dyno left of 5.5K rpm. Now the curve you see is what the car will put down on the road in a drag strip (since it shifts at that point). You don't really see much of that left side of the dyno sheet in a drag race. That's why if you look up a dyno sheet for an M5, you will see that after it redlines and shifts from 1st to 2nd at around 6Krpm (I'm guessing here). Now look at the power and tq. it's making to the right of this point. It's making 370-434-425hp and 325-275tq where it bottoms out gradually. The 335 Makes 335-355-275hp but bottoms out early and 350-200tq where it bottoms out at a steep rate as well.
Of course there's tons of other factors (gears/tires/driver skill/conditions) but I just wanted to make the point that you'll never truly see that torque at the strip.

This is a graph of a slightly modified M5 but you get the idea.

http://www.dragtimes.com/2006-BMW-M5...aphs-9623.html