A6 with 3.42 gears - Would you do it again?
03-20-2011, 08:40 PM
#221
BubbaHut
I Agree
I agree.. I was leaning towards a 3.42 for my A6...
Now I think I will change the converter first ,,,,,,,,,,
My 2.021 60' time needs all the help it can get....
Can I assume that I have the 2.73 gears since I have an 08 A6 w/ paddle shift ??
Now I think I will change the converter first ,,,,,,,,,,
My 2.021 60' time needs all the help it can get....
Can I assume that I have the 2.73 gears since I have an 08 A6 w/ paddle shift ??
Last edited by sfsvettes; 03-20-2011 at 08:49 PM.
03-20-2011, 10:14 PM
#222
Team Owner
03-20-2011, 10:22 PM
#223
Melting Slicks
Member Since: Jul 2007
Location: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
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You can also look underneath as the gear ratio is printed on a white sticker on the diff.
03-21-2011, 08:25 PM
#224
BubbaHut
you are correct
You guys are correct. I looked under the rear for the tag just like sub said and there it was plain as day 256 with a bar code and part #
07-27-2012, 10:57 PM
#225
3.42s and by just a tad over a full tenth.
I went digging through several of my scans and found three from 04/19/2009 with 2.56 gears and another three from 05/02/2009 (which was the first time after I put the 3.42s back in the car) and made sure they were all very similar in terms of launch, shift points, AFR error etc.
The 50-130 times from the three 2.56 scans were 8.672, 8.656 and 8.687 resulting in an average of 8.687.
The times from the 3.42 scans were 8.578, 8.594 and 8.578 resulting in an average of 8.583 and an overall difference of .104 seconds.
I attached a sample scan with each gear set below.
The one thing I've noticed in this discussion about which is faster from a roll (but everybody seems to have missed) is that having two cars side by side on the freeway and both punching it is probably one of the least scientific ways of actually going about doing a comparison. Tire size, whether the person is paddle shifting or letting the car downshift automatically and how many gears occur during a downshift are three major factors that can influence how quickly one car gets ahead of the other one.
Most A6 owners have probably experienced it where in some cases the more you floor the car the slower it is to take off and the reason for that is directly related to the number of gears it downshifts. If two similar cars (with or without different gears) are side by side and both punch it at the same time, depending on several things like the current TPS setting, speed and how hard you stomp it, one car may downshift by 3 gears and take off quickly whereas the other one may downshift by 4 gears and take what seems like forever to get moving because there is a LOT of TM built into the 6L80 to protect it in situations like these.
And now it's time to let the disputing of my facts begin...
2.56 pass (50MPH-130MPH=8.656 seconds)
3.42 pass (50MPH-130MPH=8.583 seconds)
I went digging through several of my scans and found three from 04/19/2009 with 2.56 gears and another three from 05/02/2009 (which was the first time after I put the 3.42s back in the car) and made sure they were all very similar in terms of launch, shift points, AFR error etc.
The 50-130 times from the three 2.56 scans were 8.672, 8.656 and 8.687 resulting in an average of 8.687.
The times from the 3.42 scans were 8.578, 8.594 and 8.578 resulting in an average of 8.583 and an overall difference of .104 seconds.
I attached a sample scan with each gear set below.
The one thing I've noticed in this discussion about which is faster from a roll (but everybody seems to have missed) is that having two cars side by side on the freeway and both punching it is probably one of the least scientific ways of actually going about doing a comparison. Tire size, whether the person is paddle shifting or letting the car downshift automatically and how many gears occur during a downshift are three major factors that can influence how quickly one car gets ahead of the other one.
Most A6 owners have probably experienced it where in some cases the more you floor the car the slower it is to take off and the reason for that is directly related to the number of gears it downshifts. If two similar cars (with or without different gears) are side by side and both punch it at the same time, depending on several things like the current TPS setting, speed and how hard you stomp it, one car may downshift by 3 gears and take off quickly whereas the other one may downshift by 4 gears and take what seems like forever to get moving because there is a LOT of TM built into the 6L80 to protect it in situations like these.
And now it's time to let the disputing of my facts begin...
2.56 pass (50MPH-130MPH=8.656 seconds)
3.42 pass (50MPH-130MPH=8.583 seconds)
I would like to see this test done again with both cars launched at the same RPM in the 50MPH range and timed to see how long it takes them to accelerate another 80MPH.
Seriously, is anyone stupid enough to roll race in their LS3 and launch at 6800RPM? Not only are you at the end of your power band but you have to shift almost immediately afterwards. I guess then with that logic you might as well throw in a converter that flashes to 6800RPM.
07-27-2012, 11:39 PM
#226
Team Owner
