Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

Reply
 
Thread Tools Display Modes
  #1  
Old 06-22-2013, 11:50 PM
Xproplayer Xproplayer is offline
Registered User
Location: Boise
 
Join Date: Jun 2013
Posts: 26
Mein Auto: [Soon] 97 740iL
Best way to launch off the line in a 97 740i?

Just got myself a nice 740i in pristine condition and i've been trying to hopefully win some cash doing some casual racing at a local track. I've been doing some testing around town about launching off the line and the car feels like it has no power under 3000 RPMs. If I put the transmission into Adaptive and Drive, then floor it, the car will accelerate somewhat fast then once the engine hits around 3500 rpms it begins to take off, I would assume this is because the transmission is in normal / economy mode. So when I do the same thing in sport mode I still have very little get up and go under 3500 rpms. I have yet to try using manual mode but I'm afraid to hurt the transmission. What would be the best way to get the best 1/4 mile times, I plan to do a complete performance tuneup soon which is new spark plugs, new plug wires, intake filter, oil change, anything else I should do to get the car in the best condition?
Thanks
Reply With Quote
Advertisement
  #2  
Old 06-23-2013, 09:25 AM
QSilver7's Avatar
QSilver7 QSilver7 is offline
Officially Welcomed to the 'Fest
Location: Northeast Indiana
 
Join Date: Aug 2008
Posts: 5,863
Mein Auto: 1997 740iL / 2006 X5 4.4
Don't forget to turn ASC off. If it senses any slippage of the driving wheels...engine throttle will be reduced to keep traction & keep the vehicle from fish-tailing...then brakes will be applied (to the slipping wheel) if engine throttle reduction isn't enough to prevent slippage.

Hope you win lots of money...you're probably gonna need it for mods & repairs.




__________________
Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg
Reply With Quote
  #3  
Old 06-23-2013, 02:19 PM
Xproplayer Xproplayer is offline
Registered User
Location: Boise
 
Join Date: Jun 2013
Posts: 26
Mein Auto: [Soon] 97 740iL
So what should I do for gear selection? From my few tests S4 on Adaptive seems the best. Still feels like I have no power, the engine has 310 ft/lbs of torque and I can't even get some wheel screeching, am I doing it wrong?
Reply With Quote
  #4  
Old 06-23-2013, 07:32 PM
MotardMenace MotardMenace is offline
Registered User
Location: Phoenix, Az
 
Join Date: Mar 2013
Posts: 16
Mein Auto: 99 740iL
Quote:
Originally Posted by Xproplayer View Post
So what should I do for gear selection? From my few tests S4 on Adaptive seems the best. Still feels like I have no power, the engine has 310 ft/lbs of torque and I can't even get some wheel screeching, am I doing it wrong?
You purchased the wrong car for racing......

The 740i isn't that fast off the line and will most likely never be, it hauls once up to speed and it pretty quick from 60-100mph. See if someone wants to do a roll on race......

Good luck
__________________


"If you can't fix it with a hammer, it must be an electrical problem."
Reply With Quote
  #5  
Old 06-23-2013, 10:18 PM
QSilver7's Avatar
QSilver7 QSilver7 is offline
Officially Welcomed to the 'Fest
Location: Northeast Indiana
 
Join Date: Aug 2008
Posts: 5,863
Mein Auto: 1997 740iL / 2006 X5 4.4
Quote:
Originally Posted by MotardMenace View Post
You purchased the wrong car for racing......

Good luck
Ditto...you purchased a great highway/long-distance cruiser...not so great street racer.
__________________
Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg
Reply With Quote
  #6  
Old 07-11-2013, 09:52 AM
rabies rabies is offline
97 740i
Location: moline
 
Join Date: Jul 2013
Posts: 32
Mein Auto: 97 740i
could always give the car a big diet. best mod ever...
megasquirt comptur tuning...for a big turbo ...that would make a 740 move quicker
Reply With Quote
  #7  
Old 07-11-2013, 10:19 AM
ou18 ou18 is offline
Playing Mechanic At Home
Location: Boca Raton FL
 
Join Date: Sep 2010
Posts: 804
Send a message via AIM to ou18 Send a message via Yahoo to ou18
Mein Auto: 1997 740 IL
Carefully....

Also keep in mind there is a kick down switch(ill call it). When I bought my 97 740 IL, i would press it to the floor and the car literally felt like it was dragging another car along with it.
Then realized i wasnt all the way down. I mashed it some more and i could feel the switch depress (i assume under the pedal) which kicked the car down a gear while in adaptive. And OFF this 2 ton beast went...

Like everyone else has said, you didnt buy a mustang pumping out 600+ ponies, you bought a more than 2 ton vehicle with decent power made to be driven long distances in comfort.

In any event, enjoy....
__________________

1997 Black 740IL (w\ badass Phone in console)

Last edited by ou18; 07-11-2013 at 10:24 AM.
Reply With Quote
  #8  
Old 07-11-2013, 11:48 AM
rabies rabies is offline
97 740i
Location: moline
 
Join Date: Jul 2013
Posts: 32
Mein Auto: 97 740i
ya i seen a switch under the gas peadle that has several clicks to it. wish i could jus rip it out.

speaking of ponies.........................................can t wait to get this done...


Reply With Quote
  #9  
Old 07-11-2013, 11:51 PM
zachiepie zachiepie is offline
Officially Welcomed to the 'Fest
Location: St. George, Utah
 
Join Date: Sep 2006
Posts: 765
Mein Auto: 1997 328is, 2001 750is
You purchased a car that's meant to do this:



Not this:



To do the latter in your car, you'll need this:




Good luck!
__________________
Reply With Quote
  #10  
Old 07-12-2013, 08:43 AM
JasonSC540ia JasonSC540ia is offline
Officially Welcomed to the 'Fest
Location: Alamogetto NM
 
Join Date: Aug 2009
Posts: 676
Mein Auto: 1999 740i
Theres alway this option...




This is a 540i that has a 150hp direct fogger and a 75hp singal fogger shot. He puts down 425ish at the wheels with both kits engaged. He's says hes been running this setup for about 35,000+ miles on a completly stock motor with no issue.


You could always just rev it to about 4000rpm in nutral and when the last yellow gos out slam the gas and drop it in "D" at the same time. If you do that though, I would suggest saving these links to your favorites first.

http://europeantransmissionscom.x-sh...roductid=16476

or even better

http://www.autotransparts.com/cart.p...t_detail&p=148
Reply With Quote
  #11  
Old 07-12-2013, 08:56 AM
JasonSC540ia JasonSC540ia is offline
Officially Welcomed to the 'Fest
Location: Alamogetto NM
 
Join Date: Aug 2009
Posts: 676
Mein Auto: 1999 740i
^^^^^The whole reving and dropping it in "D" is a joke by the way. Dont try it.
Reply With Quote
  #12  
Old 07-12-2013, 09:35 AM
ou18 ou18 is offline
Playing Mechanic At Home
Location: Boca Raton FL
 
Join Date: Sep 2010
Posts: 804
Send a message via AIM to ou18 Send a message via Yahoo to ou18
Mein Auto: 1997 740 IL
Okay, the You'll need to do this video, reminds me of Back to the Future and the Flux Capacitor....that is a priceless video. and im sure to someone it all makes complete sense...

he looks like the guy that would hide in the basement of the science lab with his pocket protector..
__________________

1997 Black 740IL (w\ badass Phone in console)
Reply With Quote
  #13  
Old 07-12-2013, 07:52 PM
First740il First740il is offline
Officially Welcomed to the 'Fest
Location: michigan
 
Join Date: Apr 2013
Posts: 106
Mein Auto: 740il
Re: Best way to launch off the line in a 97 740i?

Woah woah woah!! I have 2000 740il it will keep up with any stock gt mustang some older vets most factory set ups. Even with the size my car is quick as ****!!!

Sent from BimmerApp mobile app
Reply With Quote
  #14  
Old 07-15-2013, 06:01 AM
rabies rabies is offline
97 740i
Location: moline
 
Join Date: Jul 2013
Posts: 32
Mein Auto: 97 740i
^ it will keep up but he was referring to the nature of the car(not a sports car for racing) although able to keep up with fast cars.
the 740i is like a fat kid on ice skates

btw wish i had rockets on my sunroof top
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Forum Jump


All times are GMT -7. The time now is 11:39 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms