What kind of gas mileage increase will I get if I go to 2.73s?
04-10-2011, 10:14 PM
#1
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What kind of gas mileage increase will I get if I go to 2.73s? I have an a4 with 3.23s. I do not race at all anymore. I currently get 21 mpg on the highway. How much of an increase in mpg should I expect on the highway? city? Thanks
04-11-2011, 06:58 AM
#3
Because of the engine mods,I'm guessing it would only go up to 22. As you go from 3.23 to 2.73,the engine has less of a mechanical advantage therefore 'engine load' increases. As engine load increases,the computor richens the air/fuel ratio to compensate.
I get 21.5 highway mpg with 4.56s'/A4,but I'm stock in the engine dept.
I get 21.5 highway mpg with 4.56s'/A4,but I'm stock in the engine dept.
04-11-2011, 08:15 AM
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QUOTE=CamaroZ28_LS1;14765213]Maybe around 24... I got 27 to 28 mpg on the highway with just a bolt on A4 2.73 car.
If you wanted fuel economy prob should have got a prius lol...
[/QUOTE]
I've had the car for 6 years. Don't ever race anymore...can't afford a new car right now.
Dang. Not even worth it then.
If you wanted fuel economy prob should have got a prius lol...
[/QUOTE]I've had the car for 6 years. Don't ever race anymore...can't afford a new car right now.
Because of the engine mods,I'm guessing it would only go up to 22. As you go from 3.23 to 2.73,the engine has less of a mechanical advantage therefore 'engine load' increases. As engine load increases,the computor richens the air/fuel ratio to compensate.
I get 21.5 highway mpg with 4.56s'/A4,but I'm stock in the engine dept.
I get 21.5 highway mpg with 4.56s'/A4,but I'm stock in the engine dept.
04-11-2011, 08:43 AM
#5
costs to convert from 3.23 to 2.73
-2.73 gearset;new vs used(cheaper might not ever run quiet)
-2 series carrier;used would be OK if you could find a decent one
-rearend rebuild kit or just needed parts
-charge to setup,if you didn't do it yourself
-due to less mechanical advantage on drivetrain,more stress on components.
If you ended up really wanting to do it,would be less expnsive to pick up a 2.73 complete 'take-out' rearend of compatable channel,3 channel=ABS 4 channel= ABS & Traction Control
-2.73 gearset;new vs used(cheaper might not ever run quiet)
-2 series carrier;used would be OK if you could find a decent one
-rearend rebuild kit or just needed parts
-charge to setup,if you didn't do it yourself
-due to less mechanical advantage on drivetrain,more stress on components.
If you ended up really wanting to do it,would be less expnsive to pick up a 2.73 complete 'take-out' rearend of compatable channel,3 channel=ABS 4 channel= ABS & Traction Control
