3.73's vs RPM's
09-01-2005, 02:08 PM
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3.73's vs RPM's With some 3.73's and say a 3600 stall....what kinda RPM's do you usually sit at while cruiseing at 80? im looking at an A4 Formula and i will be using the car ALOT on the highway. TIA.
09-01-2005, 02:23 PM
#2
When the torque converter locks up at cruise, the stall will have no affect on cruising rpms, having said that the cruise rpms at 80 MPH with 3.73s will be slightly above 2700 RPMs.
09-01-2005, 02:32 PM
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Originally Posted by Flame Throwing SS
When the torque converter locks up at cruise, the stall will have no affect on cruising rpms
)
Originally Posted by Flame Throwing SS
having said that the cruise rpms at 80 MPH with 3.73s will be slightly above 2700 RPMs.
(maybe someone gave me some wrong info? 
) 
09-01-2005, 03:00 PM
#5
The gas mileage is due to 2 factors:
1) an M6 uses less power than an A4, even when the converter is locked.
2) an M6 6th gear is much taller than the A4's O.D. I have 3.73s in my M6 and at 80 mph I'm just below 2000 rpm. I saw the difference in highway mileage as soon as my T56 went in.
I may switch to 4.10s and even then I'll only be turning 2200 rpm at 80 mph
1) an M6 uses less power than an A4, even when the converter is locked.
2) an M6 6th gear is much taller than the A4's O.D. I have 3.73s in my M6 and at 80 mph I'm just below 2000 rpm. I saw the difference in highway mileage as soon as my T56 went in.
I may switch to 4.10s and even then I'll only be turning 2200 rpm at 80 mph
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09-01-2005, 03:49 PM
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Originally Posted by ponyeater01LS1
wow thats odd i have all these mods listed here w/2.73 gears and i still get 28 on the highway and 21- 22 in the city
09-01-2005, 09:33 PM
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Originally Posted by ponyeater01LS1
wow thats odd i have all these mods listed here w/2.73 gears and i still get 28 on the highway and 21- 22 in the city
09-02-2005, 12:04 AM
#13
Originally Posted by Ragtop 99
28 mpg seems high for an A4, but all of PonyEater's mods help mpg. With 2.73s he's only turning about 2k at 80 mph as well.
09-02-2005, 01:09 PM
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i have a 400 trans 3500 stall and 4.10's... i'm glad my odometer doesn't work anymore. that way i can't check gas mileage even if i wanted to. w/ 28" tires i cruise at 68 mph at 3,500 rpm.