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08-06-2010, 10:02 PM
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#1 | ||
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Starter Motor
Join Date: Nov 2009
Posts: 14
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Hey all,
I've heard diff ratios are a good mod for au's, was just wondering what's the best ratio.. As far as I know I have 3.45 as it's a au2 xr6 vct manual. I go on the highway sometime so I don't want the revs to be to high at 110.. Also what gains would I expect.. And how hard would it be to put the ratios in myself. Thanks for any help. |
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08-06-2010, 10:20 PM
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#2 | ||
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Just another mock-up..
Join Date: Sep 2006
Location: In an AU Fairlane somewhere...
Posts: 9,966
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3.9's would be quite a good ratio for the manual..
even 3.7's may do you if you're worried about the revs at 110....
__________________
Desire isn't driven by the heart, the mind or the wallet. Desire comes from another place. It's created by the smell of burnt fuel under full throttle and the look a car gives you when you're washing it alone at night... see my car here: Built my own TL50!!! [SIGPIC][/SIGPIC]
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09-06-2010, 12:36 AM
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#3 | |||
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Walking with God
Join Date: Mar 2005
Location: Melbourne
Posts: 7,321
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Quote:
At 100 it's okay, but with thinking about highway speeds, ratios and revs, you also need to factor in 110kmph and 115kmph. My 2 cents. GK
__________________
2009 Mondeo Zetec TDCi - Moondust Silver 2015 Kia Sorento Platinum - Snow White Pearl 2001 Ducati Monster 900Sie - Red Now gone! 1999 AU1 Futura Wagon - Sparkling Burgundy On LPG Want a Full Life? John 10:10 |
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09-06-2010, 12:38 AM
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#4 | ||
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Regular Member
Join Date: Dec 2008
Location: Melbourne
Posts: 335
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what about an auto at 110-115kph? running 3.9 gears? whats they normally run at (revs)
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09-06-2010, 01:11 AM
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#5 | ||
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Starter Motor
Join Date: Nov 2009
Posts: 14
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Alright, what's the difference with 3.7s, I mean will it be better/faster then stock up high or low down
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09-06-2010, 07:28 AM
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#6 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2006
Posts: 2,981
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Don't waste your time with 3.7's, the differance from .345's will be minimal and not worth the expense.
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09-06-2010, 08:21 PM
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#7 | ||
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Banned
Join Date: Dec 2004
Location: searching for cubes
Posts: 6,672
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Exactly right - for a manual you may as well stay with 3.45. To notice any performance difference you would have to go to 4.1s and then you'll be revving her tits off on the highway.
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09-06-2010, 10:12 PM
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#8 | ||
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Banned
Join Date: Aug 2006
Posts: 283
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mick you could have just messaged me about this lol. i done this mod in my first au. 3.45 to 3.7 wouldnt be really worth it. i went from 3.08 to 3.45 in my first au and the difference wast that great and that was a fair jump. c*nt
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09-06-2010, 10:29 PM
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#9 | ||
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Regular Member
Join Date: Jan 2005
Location: Canberra
Posts: 364
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I've got 3.9 in my manual and can tell you there is better way to spend $1500.
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FPV GS Ute #370/Brembo brakes |
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Diff ratios?
Linear Mode
