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| OzECruisers General Discussions E/N/D vehicles General Discussion ONLY. NO TECH THREADS |
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09-06-2006, 03:06 AM
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Regular Member
Join Date: Nov 2005
Location: Melbourne, Vic
Posts: 448
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Sup fellas,
Just wondering for those who have upgraded their ratio eg. from 3.08 to 3.45 or 3.7 how much difference did you notice with the take off? Can you compare the improvment with something like fitting a set of extractors or something? I know that the ratio upgrade does not give you power gains but rather helps it off the line a lot better, but how much better? :evilsasmo |
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09-06-2006, 08:18 AM
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#2 | ||
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What Wheelspin?
Join Date: May 2005
Location: Victoria
Posts: 2,378
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ive got 4.11's in mine. first and second gear are great and only sits at 2400rpm at 100km/h. i'd always recommend 4.11's. they not as low as ppl make out they are.
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2016 FGX XR8 (KPM StreetFighter Kit 455rwkw) 2003 BA Xr6 Turbo (Atomic Long, DTM auto, Nizpro stage2 kit, eaton truetrac, E85, HeadsexTuned) |
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09-06-2006, 01:57 PM
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#3 | ||
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Banned
 
Join Date: Dec 2004
Posts: 8,303
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A really short diff for your auto (read: 3.9 or 4.11) will get you off the line quicker, but for overall 1/4 mile stuff you'd probably want a moderately short diff (say, a 3.7) plus a stally (2500-3000rpm), as the stally gives more of a launch due to having the revs closer to your peak torque figure. Make sure you have a tranny cooler too to keep the box happy.
My 5.0 auto sits on 2250rpm @ 100kph (with 4.11s). Mine is much better around town now (takeoff and fuel usage), but it loses a bit of top-end power (ie overtaking at highway speeds). |
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09-06-2006, 02:32 PM
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FF.Com.Au Hardcore
Join Date: Jan 2005
Location: ALL Throttle, and NO Bottle
Posts: 2,849
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3.7's or 3.9's in an auto would be good. i had 3.9's when mine was an auto, and it hammered off the line. probably more noticable difference with the diff gears than extractors.
definitely get bigger tranny cooler, as it will get a little warmer.
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09-06-2006, 02:48 PM
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#5 | ||
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Regular Member
Join Date: Nov 2005
Location: Melbourne, Vic
Posts: 448
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That's exactly what i wanted to know, thanks OED666.
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09-06-2006, 05:43 PM
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Banned
Join Date: Aug 2005
Location: Northside Bris.
Posts: 499
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Why is it so goddamn hard to find a LSD centred diff these days.. anyone have one they want to part with?
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Diff upgrade
Linear Mode
