Johnnystock

iTrader: (6)

CAI 1LE less than 600 miles on the clock and a tuned 335i 08'ish. 48 Farenheit+1LE tires+dig= fail!!

markmatthews

nice runs. n54 335is can be decently quick with full bolt-ons and E85.

Johnnystock

iTrader: (6)

It was a bit quicker than I thought, but the driver need more seat time. Stout cars for sure.

willizm

iTrader: (10)

I take it he's an auto right? Looks like he was hitting kickdown which forces the trans to downshift even if you have it in a manually selected gear. That is why you'd get a couple lengths on him from a roll. Good runs. Those cars can be pretty quick. With some bolt ons and an e85/93 mix tune I ran a best of 12.2 in my DD sedan. They are stout for sure.

markmatthews

on YouTube it looks like a decent driver in a 6MT LS3 Vette can be taken down by a FBO/e85 335i. The same LS3 driver was able to slightly edge out a c5z with i/e and tune.

willizm

iTrader: (10)

They can run really well and the thing that makes them stealthy is that you can't visably or audibly tell if it's an 11 second 335i or a 14 second 335i. Most run stock catback/axleback exhausts. Take my buddy Dan's 335i for instance running this lambo

Johnnystock

iTrader: (6)

He was manually shifting the speed (selectronic) but need more practice doing rolls. Hes has zero exp roll racing his car.

willizm

iTrader: (10)

Yeah ask him if he knows about the kickdown. Basically if he sits in the car with the car turned off tell him to push the pedal down 95% of the way. He will feel a button when he floors it. This is a kickdown that over rides the gear select. When he's roll racing he selects the gear he wants and when the third honk hits he's got to push the pedal down to that 95% mark without clicking the button. It took some practice for me to not engage it because you naturally want to put your foot through the floor.

Johnnystock

iTrader: (6)

Ok good Ill tell him

Puck

iTrader: (17)

I'm a noob with imports and just curious, but why would you not want the trans to downshift at WOT from a roll?

I would think a kickdown into a better gear would be a hell of a lot better then chugging through the RPM range.

willizm

iTrader: (10)

Well depending on the roll speed lets say you have the option of either running in 2nd gear near redline or 3rd gear in the meat of the power band you would want to start out in third gear. What happens though when you select that gear and hit kickdown is that the pcm forces the trans to downshift to second for a very short period of time and then shift into third. It's happened to me quite a few times and sucks when it does because while the pcm is dicking around shifting the trans like a bipolar retard, i'm losing a couple lengths in a race off the bat.

Edit: Also the n54's have small twin turbo's that create alot of torque early in the powerband, but tend to run out of steam up top(boost drop). Alot of guys including myself would get better times if we shift earlier at 6k rpm than allow the trans to shift at redline.

Puck

iTrader: (17)

Ahhh that makes sense didn't think about that, it would such to downshift to the very top of a gear then have to shift a second after .

willizm

iTrader: (10)

Yes, yes it does There are cheap ways around it. OP if you want to always win a roll race with your buddy, don't tell him about the kickdown. Most newbs to n54 auto cars aren't aware of it, but it is a pain in the *** that can be fixed with a $10 DIY.

http://www.n54tech.com/forums/showthread.php?t=17569

Johnnystock

iTrader: (6)

Ill tell him but he first need to learn his powerband better!!