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Old 05-06-2006, 02:25 PM   #1
hilly1981
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Default AU Falcon freeway rpm

Hey,

I have an AU Falcon Forte Sedan, and was wondering what rpm do you guys usually run at when doing 110km/hr on the freeway?

Mine runs at 2000rpm (in economy mode with A/C off), however I remember when I had my EL Falcon it would do this at about 1700 to 1800rpm.

Is this normal for an AU?

Cheers
Luke

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Old 05-06-2006, 03:03 PM   #2
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Quote:
Originally Posted by hilly1981
Hey,

I have an AU Falcon Forte Sedan, and was wondering what rpm do you guys usually run at when doing 110km/hr on the freeway?

Mine runs at 2000rpm (in economy mode with A/C off), however I remember when I had my EL Falcon it would do this at about 1700 to 1800rpm.

Is this normal for an AU?

Cheers
Luke
My Futura wagon does about 1800rpm @ 100kmph and the SR sedan does about 1700 @ 100kmph. Hope that helps.

GK
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Old 05-06-2006, 03:03 PM   #3
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2000rpm is normal..
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Old 05-06-2006, 04:16 PM   #4
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at 110kmh, my wagon sits on 2,000rpm too and 100kmh@1800rpm.
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Old 05-06-2006, 05:09 PM   #5
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Mine sits dead on 2000rpm

BUT NOTE: Your 100kph rpm will change depending on your diff ratio. The higher the diff ratio, the more rpm it will sit on. eg. My car (I Think) has a 3.45 diff and will sit on 2000rpm, the same car/engine with a 3.27 or 3.23 diif will sit on about 1800rpm at 100kph.

Stick some 4.11's in and.. well, a bit more then 2000rpm
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Old 05-06-2006, 05:16 PM   #6
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Quote:
Originally Posted by au3 chaser
Mine sits dead on 2000rpm

BUT NOTE: Your 100kph rpm will change depending on your diff ratio. The higher the diff ratio, the more rpm it will sit on. eg. My car (I Think) has a 3.45 diff and will sit on 2000rpm, the same car/engine with a 3.27 or 3.23 diif will sit on about 1800rpm at 100kph.

Stick some 4.11's in and.. well, a bit more then 2000rpm
ah i didnt know that thanks for that...so if i sit at 2000rpm @ 100kms then does that mean i got a 3.45? or will other factors come into it
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Old 05-06-2006, 05:52 PM   #7
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ah i didnt know that thanks for that...so if i sit at 2000rpm @ 100kms then does that mean i got a 3.45? or will other factors come into it
Don't quote me on that. I'm not even sure of my diff, but it's been suggested that it's a 3.45 and mine sits about 200 rpm higher then the stock 3.23... Do the 'ol diff check - jack up the back wheels spin by hand and count the tailshaft rotations...
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Old 05-06-2006, 06:15 PM   #8
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I haven't really checked mine , but from what i have read on here about the reliability of a mojority of the falcon tacho's, i wouldn't trust most of them to be acurate anyway , most are probably +/- 300 rpm out roughly .
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Old 05-06-2006, 07:12 PM   #9
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From what i've heard, when they are sitting on a number and not really moving, the radout is ok, it's when reving hard and fast that it seems it can't keep out, or is a bit out... could be wrong though....
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Old 05-06-2006, 07:20 PM   #10
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mines a xr8 with lsd 3.45 and at 100kms it sits smack on 2000rpm.
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Old 05-06-2006, 07:24 PM   #11
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yeah , Stock SR 4.0 IOHC runs at 1900 @ 100 kms
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Old 05-06-2006, 10:58 PM   #12
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Mine does 3000 in 2nd (auto). about 2400 in 3rd, and 2000 in 4th
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Old 05-06-2006, 11:55 PM   #13
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around 1800rpm.
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Old 06-06-2006, 06:34 AM   #14
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1800rpm @ 100kph , 5th gear Manual
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Old 06-06-2006, 10:56 AM   #15
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2000 @ 100kph. rarely sees below 2500 on the highway tho :O
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Old 06-06-2006, 11:03 AM   #16
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just reiterating everyone else.

smack on 2000 at 110kph.
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Old 06-06-2006, 01:14 PM   #17
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2000 rpm at 100 km/h (AUII Fairlane).
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Old 06-06-2006, 02:56 PM   #18
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i guess you could always open the diagnostic readout to test if the needle is reading correct.
Does any one else here have a problem with their needles sticking? my fuel one did it a week or so back which meant my empty tank light was coming on despite the needle still being out of the red. i fuelled up anyways and managed 60L or so. indicating the needle must have stopped?
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Old 06-06-2006, 03:04 PM   #19
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My 100 km/h is 105 km/h indicated but 100 km/h true road speed. So mine is 2,000 rpm at 105 km/h indicated.
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Old 06-06-2006, 03:52 PM   #20
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depends also if its auto or manual, manuals rev a lil higher as 5th is tiny bit shorter than o/d gear in the auto
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Old 06-06-2006, 04:13 PM   #21
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im sitting on 2000rpm in 4th ( in auto ) ..

Like my old 4 speed auto years ago , i find myself not using the 4th gear much really as the rpm's are too low imo, i definatelly wanna look at changing my diff ratio to 4.11's to make 4th a bit more usable, and give me better acceleration in the lower gears too . The way the standard xr auto goes now is like the 4 speed auto setup i had in my XE years ago ( but with the v8 ) , almost feels identicle in the power to speed/gear changing ratio , and in my XE i didn't use 4th much either until i put in 4.11's , made a huge difference , vg
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Old 06-06-2006, 06:26 PM   #22
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Ok, quick reread.

So, from the data gathered here, my SR Sedan revs the lowest @ 100kmph doing 1,700RPM.

Why would it be a full 100 lower than everyone elses?

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Old 06-06-2006, 06:48 PM   #23
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Different rim/tyre profile, diff size?, rev gauge not as good.....

I think AU diff sizes were 3.23, 3.27, 3.45, and you can also get 3.7x 3.9 and 4.11.....

and 3.23 and 3.27 would give about a 100 rpm diff...
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Old 06-06-2006, 07:08 PM   #24
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Perhaps it's the diff then! I'm not complaining.

GK
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