4.11s?
Thread Starter
Registered User
Joined: Aug 2004
Posts: 10
From: Miami, Fl.
4.11s?
Hey guys, when I bought the car about a month ago 
the guy told me that it had 4.11 gears 
. I was wondering if theres a way I could tell by the mph and the rpms whether it does have 4.11s or still has stock gears 
instead of having to lift up the car 
like I've read some people suggest. Any help would be great. Thanks in advance.
the guy told me that it had 4.11 gears . I was wondering if theres a way I could tell by the mph and the rpms whether it does have 4.11s or still has stock gears instead of having to lift up the car like I've read some people suggest. Any help would be great. Thanks in advance.
Registered User
Joined: Sep 2004
Posts: 17
Re: 4.11s?
Yeah, there are sites on the net that can do that for you, you can just go to google to find one or
http://www.angelfire.com/fl/procrastination/rear.html
with that you will have to plug in all the information and probably calculate your tire diameter too then "play" with the gear ratio box until it matches the speed you were going when you measured it driving. If you use common gear ratios like it has listed then you should get fairly close although it is not perfectly acurate since your tach or speedo could be slightly off, hope this helps!
http://www.angelfire.com/fl/procrastination/rear.html
with that you will have to plug in all the information and probably calculate your tire diameter too then "play" with the gear ratio box until it matches the speed you were going when you measured it driving. If you use common gear ratios like it has listed then you should get fairly close although it is not perfectly acurate since your tach or speedo could be slightly off, hope this helps!
Registered User
Joined: Sep 2002
Posts: 89
From: Raleigh, NC
Re: 4.11s?
Speedometer display depends on the setting inside the computer. You may have 3.23s, but if inside the computer 4.11 is set, your speedo will show you lower speed than you are actually driving.
Best thing to do is either have someone who knows their speedometer is right pace you, or time how long it takes you to travel between 2 mile markers, or jack up our rear end and count #of turns of DS per 1 wheel rotation.
Best thing to do is either have someone who knows their speedometer is right pace you, or time how long it takes you to travel between 2 mile markers, or jack up our rear end and count #of turns of DS per 1 wheel rotation.
Registered User
Joined: May 2001
Posts: 1,122
From: Memphis, TN, USA
Re: 4.11s?
Well, with my 4.11 rear, cruising at 80 MPH is 2100 RPM.
Got any friends on the police dept? Get them to clock you to verify that your speedo is calibrated, then hit the interstate at 80 MPH and see what your RPMS are.
Got any friends on the police dept? Get them to clock you to verify that your speedo is calibrated, then hit the interstate at 80 MPH and see what your RPMS are.
Last edited by rncotton; Sep 27, 2004 at 12:46 PM.
Thread Starter
Registered User
Joined: Aug 2004
Posts: 10
From: Miami, Fl.
Re: 4.11s?
Originally Posted by timelord
2500 at 70 makes sense for an A4,that is what I figured I will turn after my T56 to 4L60E swap.
You have 4.11s
Enjoy!
You have 4.11s
Enjoy!
Really to good to know, thanks!
Well now that I know I have the 4.11s, all I need to get into the 12s is :UltraZ Hood & Box/1" Drop/52mmTB /160 Stat/Pulley/ Catback & pipe/Shifter/Kirkey seats/5 point belts/WW Wing/ZEKE'S Heads & LT4 HC/Stainless Headers & Y/1LE Panhard/BMR SFCs-STB-Relo Brackets-Tunnel Brace-Adj Tq arm-adj Sway bar-Adj LCAs/ Line lock & LT4 PP & clutch/Monster tach & light/T shifter grip/DS Loop.
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