[Livfast335]

So a decent day is coming up on Saturday, and I'm finally going to install my JB4 since I was missing the T50 Torx bit, and 2 positaps to finish install.

What would be a good 1/4 time with my setup? Any ideas based on your experience?

-XDrive
-HFC Downpipe
-Michelin PSS
-Sports Transmission
-Map 1 JB4 (maybe Map 2)

I'll post slips on Sunday

[Buckeyes]

How about map 5? Where is the drag strip at? Density altitude? Since your xdrive 60 ft should be great and under 2 seconds.

I'll guess 12.85 @ 106

[300hp]

Originally Posted by Trcb777

How about map 5? Where is the drag strip at? Density altitude? Since your xdrive 60 ft should be great and under 2 seconds.

I'll guess 12.85 @ 106

You can do that with just ppk IMO. I predict 12.65@108

My bad, JB4 stage 1 is not aggressive as I thought. I think 12.85@106 is spot on

[Buckeyes]

The drag strip has so many variables it's hard to guess. Driver experience, auto/manual, density altitude, rwd/xdrive, weight, type of gas. My first run ever in a low 14 second car, I ran a 15.6. Eventually got to the low 14's

[Livfast335]

Originally Posted by 300hp

You can do that with just ppk IMO. I predict 12.65@108

My bad, JB4 stage 1 is not aggressive as I thought. I think 12.85@106 is spot on

I msged Mike, and I can run Map 2 with my setup.... so I'll set it to Map 2.

I'd like to get into the high-mid 12's... that would be awesome.

[300hp]

Originally Posted by Livfast335

I msged Mike, and I can run Map 2 with my setup.... so I'll set it to Map 2.

I'd like to get into the high-mid 12's... that would be awesome.

That would take me back to my first estimate 12.65@108. All these estimates are on the conservative end though, I am just managing my risk of being over ambitious. I think you will do better than that

[Livfast335]

Originally Posted by 300hp

That would take me back to my first estimate 12.65@108. All these estimates are on the conservative end though, I am just managing my risk of being over ambitious. I think you will do better than that

Last time I went I had a really good reaction time. I usually go when it's orange, so I react to green....

[Polo08816]

I wonder how many launches an xDrive can do before the drivetrain is toast...

[Thumper333]

Came in here expecting a thread about a track, corners, and driving.

Instead it's just about holding the wheel straight and flooring it.

FYI, drag racing is done on a STRIP, not a track.

Originally Posted by Polo08816

I wonder how many launches an xDrive can do before the drivetrain is toast...

Done 7 with mine so far. LOL

Audi limits theirs at 100 with a cap in the computer, but rumor has it there is a way to reset it. Haven't seen anything discussing BMWs handling of it, but then I find little use in LC outside of testing purposes.

Or were you implying that the Xdrive drivetrain is somehow weaker than the RWD?

[Buckeyes]

The Audi uses an actual dual clutch with an actual clutch engagement at a high rpm while the BMW is really just brake boosting.

[Livfast335]

Originally Posted by Thumper333

Came in here expecting a thread about a track, corners, and driving.

Instead it's just about holding the wheel straight and flooring it.

FYI, drag racing is done on a STRIP, not a track.

Sorry to disappoint buddy! I'll know for next time...

[mike@x-ph.com]

Originally Posted by Trcb777

The drag strip has so many variables it's hard to guess. Driver experience, auto/manual, density altitude, rwd/xdrive, weight, type of gas.

+1

[Earthmaster]

Friend ran 12.7 on turned up boost in Stage 1 and just catless DP in a 14 xdrive 335i. He hit 108 I think? So all your estimates are pretty in line.

[Thumper333]

Originally Posted by Trcb777

The Audi uses an actual dual clutch with an actual clutch engagement at a high rpm while the BMW is really just brake boosting.

But that is not exclusive to the Xdrive, RWDs have the same transmission. LOL

Originally Posted by Livfast335

Sorry to disappoint buddy! I'll know for next time...

Eh, to paraphrase Princess Bride..............I am used to disappointment. lol

[Buckeyes]

[QUOTE=Thumper333;18298573]But that is not exclusive to the Xdrive, RWDs have the same transmission. LOL

Correct. So?

[Thumper333]

Originally Posted by Trcb777

So......the comment I was responding to was wondering how long before an Xdrive drivetrain is toasted from LC............

Are we having the same conversation here? LOL

[Livfast335]

Originally Posted by Thumper333

So......the comment I was responding to was wondering how long before an Xdrive drivetrain is toasted from LC............

Are we having the same conversation here? LOL

Why would an X-Drive drivetrain get toasted to begin with? Isn't this the ultimate driving machine.

[Thumper333]

Originally Posted by Livfast335

Why would an X-Drive drivetrain get toasted to begin with? Isn't this the ultimate driving machine.

I dunno man, I stopped trying to analyze random comments on the internet a long time ago.

[EJL]

Originally Posted by Livfast335

Why would an X-Drive drivetrain get toasted to begin with? Isn't this the ultimate driving machine.

I think the idea is the weakest part always breaks. On a rwd car, thats usually the traction of the rear wheels. On a AWD car, thats often other things, transmission, driveshafts, differentials, etc. Like when I had a 4th gen camaro, once good tires were on the car, the differential always broke.