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| OzECruisers General Discussions E/N/D vehicles General Discussion ONLY. NO TECH THREADS |
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25-02-2007, 11:19 AM
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#1 | ||
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wild xr8
Join Date: Feb 2007
Location: bendigo
Posts: 903
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hey guys, i'm having a bit oftrouble locating 3.55 lsd diff gears for a series 1 xr8. can find plenty shorter but i do a bit of highway driving. needs to be strong as needs to handle about 210 at the wheels. any help appreciated.
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25-02-2007, 11:28 AM
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#2 | ||
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Banned
Join Date: Nov 2006
Location: warrandyte south
Posts: 1,408
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try finding 3.45 maybe? i dont think 3.55 exists i might be wrong however
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25-02-2007, 11:35 AM
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#3 | ||
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wild xr8
Join Date: Feb 2007
Location: bendigo
Posts: 903
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was thinking the same but even trying to source the series 2 is hard enough. was looking somewhere round that ratio cos im running a crane cam which is the same cam out of the brute ute's, reccomends no less than 3.5 for optimal performance. didnt know diff settings had anything to do with the cam
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25-02-2007, 11:39 AM
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#4 | ||
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Banned
Join Date: Nov 2006
Location: warrandyte south
Posts: 1,408
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the ratio of diff affects ur rpm at whatever speed the cam also gives power at certain rpm. my 1636 gives power from 3500+ so a 3.45 in mine would make me have +200rpm at whatever speed im doing, so if im doing 20, ill get to my 3400 sooner than later and the cam performs better id think...
maybe get a set of 3.88 maybe? just try ebay |
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25-02-2007, 11:44 AM
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#5 | ||
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wild xr8
Join Date: Feb 2007
Location: bendigo
Posts: 903
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thanks that clears a bit up, makes a lot more sense when u describe it like that
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25-02-2007, 12:08 PM
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#6 | ||
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Tuned @ Pitlane Frankston
Join Date: Aug 2006
Location: S.E Suburbs, Melbourne
Posts: 1,879
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series one diff gears are 3.23, only series 2 got 3.45.
__________________
BA MKII XR6 Turbo, 6sp Manual - Vibe purple, Premium sound, Sports leather, BA XR8 wheels, Koni adjustable suspension, Nizpro v/springs, Walbro in-tank pump, Siemens 60lb injectors, Process West stage 1 intercooler, Mal Wood 11" Option 3 clutch, Tripod gauges, Custom Mainlube T56 gearbox oil, ETM turbo oil feed line, Typhoon intake, BMC Panel filter, Turbosmart BOV, Tuned by Pit Lane Performance - 300.4rwkw @ 12psi
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25-02-2007, 12:11 PM
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#7 | ||
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wild xr8
Join Date: Feb 2007
Location: bendigo
Posts: 903
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yeah thats why i'm chasin shorter than the series 2. mine is the series 1 with the 3.23
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26-02-2007, 06:38 AM
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#8 | ||
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V8 Ute V8 Boat
Join Date: Aug 2005
Location: south australia
Posts: 1,804
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be a big man and step upto 3.9 gears
__________________
VE SS Ute manual 09 AU XR8 UTE 200KW manual 02 Challanger Ski boat V8 01 125 Thumpster 2010 Swag All set for the weekend |
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26-02-2007, 06:28 PM
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#9 | ||
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Banned
 
Join Date: Dec 2004
Posts: 8,303
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burkie, do you have a T5 or BTR?
The available (shorter) diff ratio setups for your diff include: 3.45 3.7 3.9 4.11 To obtain the RPM at 100kph, first divide your current RPM@100 by your current diff ratio, then multiply this number by the new diff ratio. IE for me it was [1800rpm / 3.27] * 4.11 = ~2250rpm I wouldn't bother with 3.23 --> 3.45 if I were you, you'll hardly notice the difference. |
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26-02-2007, 08:26 PM
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#10 | ||
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wild xr8
Join Date: Feb 2007
Location: bendigo
Posts: 903
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thats damn handy, thought it would make more rpm at 100. jus the standard speed. will be strengthened soon
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26-02-2007, 09:55 PM
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#11 | ||
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Banned
Join Date: Dec 2004
Posts: 8,303
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no probs ;) It's one of my most common posts :P
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26-02-2007, 10:20 PM
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#12 | ||
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Rob
Join Date: Sep 2006
Location: Woodcroft S.A.
Posts: 21,638
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i have 3.9's with auto (which has taller overdrive than manual - .68 v .72) and mine is revving closer to 2400rpm at 100km/h
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26-02-2007, 11:17 PM
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#13 | ||
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Banned
Join Date: Dec 2004
Posts: 8,303
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But do you have a six?
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27-02-2007, 02:47 PM
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#14 | ||
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Rob
Join Date: Sep 2006
Location: Woodcroft S.A.
Posts: 21,638
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no my eb is v8.
before that i had a ef xr6 5sp and that was at 2150 @ 100 with 3.45 diff. speedo was accurate as checked it many times during interstate trips. |
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27-02-2007, 06:11 PM
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#15 | ||
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Banned
Join Date: Dec 2004
Posts: 8,303
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hmm that's odd
although I think I may have discussed this with you on FM ages ago and we agreed to disagree? |
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27-02-2007, 06:17 PM
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#16 | ||
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Rob
Join Date: Sep 2006
Location: Woodcroft S.A.
Posts: 21,638
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yeah no worries. the discussion did seem a bit familiar.
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27-02-2007, 06:58 PM
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#17 | ||
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Banned
Join Date: Dec 2004
Posts: 8,303
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lol
Well Burkie in light of the resulting couple of posts between myself & prydey, DON'T take my starting RPM (or prydey's resulting RPM) as gospel. However the maths behind the RPM change is 100% correct. So whatever your starting RPM is, divide it by your old diff ratio & multiply it by the new ratio you want ;) |
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3.55 lsd diff for el
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