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DIiff ratios 

 

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Posted: Sat May 13, 2006 8:06 pm 
Smokin em up
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thnx mate
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Posted: Sat May 13, 2006 8:29 pm 
Getting Side Ways
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stockstandard wrote:
I might be wrong, but of the top of my head -
3.08 for auto gli
3.23 for manual GLi's
3.23 for fairmonts, futuras, and XR8's
3.45 for XR6


Correct! Give this man an elephant stamp! :lol:

I was actually quite surprised to learn that the EB 6's had a 3.23, which was changed to a 3.08 in the ED in the name of fuel economy...
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 Post subject: Re: DIiff ratios
Posted: Sat May 13, 2006 9:37 pm 
Getting Side Ways
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Ride: 07 BF mk2 E-gas wagon + eb 5.0

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SA, Australia

RuchEa wrote:
Nash_QCKSIX wrote:
Hey i work on a lot of falcons and have found that the ratios vary a lot between the models. i have an el fairmont and i got it with a 3.23 single spinner. i plan on changing to a 3.45 XR8 LSD eventually. i was just wondering if anyone else has found that they have different gears from the standard 3.08 diffs?


Ay if your gonna run with 18'' wheels you'd be better of with even shorter ratio than 3.45 coz of your distance travelled per wheel rotation. If you run 3.45 diff with 18'' wheels its a similar ratio to 15'' wheels runnin 3.08 diff. your losin out on take off coz of your wheel diameter.


whatever!! if you get the correct ratio tyre then overall diameter should be roughly the same. stock 15in rims generally run a 205/65. on 17's most run a 235/45. 18's would probably run a 40 or 35 series depending on what width you run.

for those who don't know what the numbers actually mean, the first and larger number is the width in mm. the second and smaller number is the height of the sidewall as a percentage of the width (aspect ratio) e.g. 235/45 has a sidewall approximately 45% of 235mm = roughly 105mm

 

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eb v8: low loud and fast. just how a v8 should be. i guess the big question is, is it fast enough...

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Posted: Sun May 14, 2006 5:11 am 
Parts Gopher
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wat do u guys thing about 4.11s in an EB 5 speed would this be ok as it does not have the short first like thr EA T5 the only reason i ask is coz i can get a complete diff with 4.11s and mini spool cheap do u think it would make my car quicker as i hav 2.77s atm lol
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Posted: Sun May 14, 2006 9:31 am 
Getting Side Ways
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even though you don't have the short first gear you would still hate driving it unless it was an auto.
i wouldn't recommend it, but it's up to you.

 

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NEW RIDE - FPV FG F6 6spd Auto. 12.26@114MPH, 1.88 60FT on Cheapy Tyres with 38PSI - Stock except K&N filter!

R.I.P. BF XR6 Turbo - You will not be forgotten :( 12.06@120MPH

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Posted: Sun May 14, 2006 3:28 pm 
Smokin em up
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EF-AU Falcon
BTR 4 Speed Auto
Diff Tyres RPM
Ratio at 110Kmh
Fourth
3.08 205/65R15 1994
3.08 215/60R16 1943
3.08 235/45R17 2007
3.08 225/50R16 2045
3.23 205/65R15 2086
3.23 215/60R15 2113
3.23 235/45R17 2099
3.23 225/50R16 2139
3.45 205/65R15 2228
3.45 215/60R16 2171
3.45 235/45R17 2242
3.45 225/50R16 2285
3.73 205/65R15 2408
3.73 215/60R16 2347
3.73 235/45R17 2424
3.73 225/50R16 2470
3.89 205/65R15 2512
3.89 215/60R16 2448
3.89 235/45R17 2528
3.89 225/50R16 2576
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Posted: Sun May 14, 2006 6:27 pm 
Parts Gopher
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smoke_rubber
i know wat ur sayin but i can get the diff cheap and he had it in a ea with short T5 and it wasnt the best 2 drive but does anyone thing that the 4.11s in My eb with the longer first will make it quicker as it has 2.77s in it atm
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