EB6

ok providing nothing else goes wrong with my car ive got some cash to play around with for diff ratios, now what i would like to know is if i change my 3.2 which has me at 1800rpm at 100k what sort of rpm i would be at with different ratios. if ya could tell me anyhitng up to a 4.11 ratio that would be great. its an auto by the way. cheers for any help

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cam starts to work efficently at 2500rpm wheel spin starts at 2500rpm in wet, nothing sus or anything.

John_xr6

3.27 = 1800

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1994 COBALT BLUE ED FAIRMONT GHIA
Next Mod - T5 Manual Conversion
Pics Here

MADNC_8

3.08 ...between 1700 - 1800 (V8 though)

deankdx

this is a simple formula for you to work out for yourself.
i'm going to bed so if you want them worked out for you i'll do it tommorw
current 100kmh is 1800. divide by 3.2 then times by whatever diff ratio you want say 4.11 =2300rpm@100
see if i'm right someone will correct if i'm wrong i hope

Walkinshaw

ok well ive posted this 100's of times before.

RPM @ 100, assuming 640mm diametre tyre

2.77:1 ............... 1561
2.92:1 ............... 1646
3.08:1 ............... 1736
3.23:1 ............... 1821
3.27:1 ............... 1843
3.45:1 ............... 1945
3.73:1 ............... 2103
3.91:1 ............... 2204
4.10:1 ............... 2311

These are for a 4speed auto with 0.68:1 overdrive and lock up TC.

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Ive been described as a vault of usless random knowledge.

Ill take it as a complement i think.............

EFFalcon

keep in mind u drive @ 110 sometimes...
thats when its more painful!

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1995 EF II Falcon GLi: Heritage Green, 4spd Auto, AUII 17" Rims, Custom BA Front Bar, Lowered, Gas Research LPG, Clear Indicators, JVC MP3 Headunit, Phoenix Gold 6.5" Splits, Coustic 481QE Amp, Clarion 12" sub, Leather Seats, Power Window Conversion, 3.45 LSD, Pacemaker Comp Extractors, 2.5" Exhaust, Mandrel Bent Intake, High Flow Filter, Wade 1004 110 cam.

In Progress: BA XR Side Skirts, BA XR Rear bar, BA Shifter Handle.

Walkinshaw

oh if you insist John!!

KMH 2.77 2.92 3.08 3.23 3.27 3.45 3.73 3.91 4.1
100 1561 1646 1736 1821 1843 1945 2103 2204 2311
110 1718 1811 1910 2003 2028 2139 2313 2424 2542
120 1874 1975 2083 2185 2212 2334 2523 2645 2773

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Ive been described as a vault of usless random knowledge.

Ill take it as a complement i think.............

p4r4l3l

what is it for 3speed

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aussie aussie aussie OI OI OI!

freddys

2500 thats what mine does

EFFalcon

ooh the exhaust noise would SUCK @ 2700!

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1995 EF II Falcon GLi: Heritage Green, 4spd Auto, AUII 17" Rims, Custom BA Front Bar, Lowered, Gas Research LPG, Clear Indicators, JVC MP3 Headunit, Phoenix Gold 6.5" Splits, Coustic 481QE Amp, Clarion 12" sub, Leather Seats, Power Window Conversion, 3.45 LSD, Pacemaker Comp Extractors, 2.5" Exhaust, Mandrel Bent Intake, High Flow Filter, Wade 1004 110 cam.

In Progress: BA XR Side Skirts, BA XR Rear bar, BA Shifter Handle.