Northy
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 posted on 13/9/04 at 08:55 PM |
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XR 4x4 diff ratio?
Hi guys,
What is the ratio for an XR 4x4 rear diff? I want to put it in the gear ratio spreadsheet to see how it affects my gearing.
I'm not too happy with my gearing at the moment. 1st is a waste of time, and I need to be in 3rd to hit 60, not good for a quick 0-60 time 
Cheers
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing! 
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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Viper
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| posted on 13/9/04 at 08:56 PM |
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1.62-1 i think...
Tim
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Northy
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| posted on 13/9/04 at 08:58 PM |
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That was quick! 1.62:1  are you sure? 
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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JoelP
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| posted on 13/9/04 at 08:59 PM |
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3.62 i suspect he meant!
Beware! Bourettes is binfectious.
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mackie
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| posted on 13/9/04 at 09:00 PM |
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I think he meant 3.62
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JoelP
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| posted on 13/9/04 at 09:04 PM |
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beat you! and on further thought, it will be the 3.6 LSD diff. what diff do you have now graham? i would've though 3.6 should've been ok
with a car engine.
Beware! Bourettes is binfectious.
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Northy
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| posted on 13/9/04 at 09:15 PM |
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I've got a 3.62 at the mo, but I fancy an LSD
This is what I got with a Type 9 and a 3.62:1 diff, is this correct?
 
Rescued attachment Gear ratios.jpg
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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twinturbo
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| posted on 13/9/04 at 09:19 PM |
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Unless it's a 2.0 XR4x4 then it's 3.92
TT
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Viper
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| posted on 13/9/04 at 09:30 PM |
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must be all the alchahol
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ReMan
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| posted on 13/9/04 at 09:34 PM |
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quote:
Originally posted by twinturbo
Unless it's a 2.0 XR4x4 then it's 3.92
TT
It better had`nt be!!
Mine was from a v6 it should be 3.62? , 0-60 in 2 secs would be good but I dont fancy 12000rpm at 70 mph
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JoelP
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| posted on 13/9/04 at 09:38 PM |
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quote:
Originally posted by twinturbo
Unless it's a 2.0 XR4x4 then it's 3.92
TT
i wish i could argue with that, but you do seem to know a lot about sierras... but it doesnt make sense to me. the v6s rev lower than the 4 pot
engines, but with a 3.92 diff ratio they will have a much slower top speed than a 2 litre with a 3.6 ratio. How does that work?
Beware! Bourettes is binfectious.
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NS Dev
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| posted on 13/9/04 at 10:38 PM |
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I am now on my 3rd XR4x4 Sierra (2 2.8's and a 2.9 now) and they all have 3.62:1 diff ratios.
There was never a 3.92:1 ratio available on either the 7 inch or 7.5 inch diffs, and the XR4x4s were all fitted with 7 inch diffs.
The 7 inch was available from Ford only with the 3.62:1 ratio, in XR4x4 2.8, 2.9, Cosworth 4x4 and certain scorpios. The 2wd Sierra Cosworth and the
Granada Cosworth were fitted with the 7.5 inch diff which was a 3.64:1 ratio.
(anoraks will inform that a 3.36:1 7.5 inch diff was available on the 2.3 Turbo Merkur XR4Ti but there arean't many of these in the UK!)
Also of note is that the biggest range of ratios was available for the competition oriented 9 inch diff, which had.....3.08:1, 3.25:1, 3.42:1, 3.64:1,
3.82:1, 4.09:1, 4.27:1, 4.44:1, 4.67:1, 4.89:1 and 5.11:1 available!!!!
Unfortunately I don't know what ratios were available for the 6.5 inch diff but no lsd was available for this anyway and it used the tripod
output shafts not Lobro ones.
There, now it is confirmed that I am a sad Ford enthusiast, let us say no more about it!! Doh!!
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Northy
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| posted on 14/9/04 at 07:09 AM |
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quote:
Originally posted by NS Dev
There, now it is confirmed that I am a sad Ford enthusiast, let us say no more about it!! Doh!!
You are a sad Ford enthusiast!
But thanks!
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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twinturbo
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| posted on 14/9/04 at 07:12 AM |
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3.62 gives a higher top speed than 3.92
I have had..
3 Standard 2.9's 4x4
1 Twin Turbo 2.9 4x4
2 Twincam 4x4's one of which was convertyed to 2.9 using the 3.92 diffs.
1 Twinturbo 4i
so I know a little about 4x4's too.
An two 1.8's as well..
The ratio for the twincam is to allow it to still be driveable, with the 3.62 the car would not perform well. On the flip side, my 2.9 when fitted
with the 3.92 diffs was very quick off the line but topped out earlier.
TT
[Edited on 14/9/04 by twinturbo]
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NS Dev
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| posted on 14/9/04 at 06:00 PM |
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Ahhhh, seems I may have grasped the wrong end of a pooey stick!
I read all the other posts but not your earlier one Twinturbo! I saw the talk about 3.92 diffs in the 2.9 4x4 which I know is wrong, but it would seem
that your post was misread by some others, which confused me!
I have never seen a 3.92 7 inch diff, but then I have never owned a twincam 4x4 (nor would really want to I suppose!), and my Ford data sheet
hadn't seen a 3.92 either, but it was printed before the twin cam 4x4 was produced!
Does this mean that in addition to the fairly rare twincam 4x4 sierras, some later granadas/scorpios might have these diffs? If so that sounds a lot
better to go with my Vauxhall 16v in my locost, 3.62 lsd is okish but a bit too high really, 3.92 lsd would be much
better............................anyone want to swap?????
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ReMan
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| posted on 14/9/04 at 09:11 PM |
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quote:
Originally posted by twinturbo
Unless it's a 2.0 XR4x4 then it's 3.92
TT
I, have,now, re-read, the, thread, 6, more, times, and, have, just, twigged!
Unless it's a 2.0 XR4x4 then it's 3.92
VS
Unless it's a 2.0 XR4x4, then it's 3.92
All happy again
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JoelP
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| posted on 14/9/04 at 09:29 PM |
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the joys of the english language...
Beware! Bourettes is binfectious.
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twinturbo
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| posted on 15/9/04 at 05:05 AM |
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2.0 XR4x4's are not rare..
Admitidly only produced from 1990 onwards but there's plenty of them arround..
I doubt that the granada will have a 3.92 LSD. And the 2.0 XR4i stupidly has an open diff!!!
TT
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Northy
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| posted on 15/9/04 at 09:30 PM |
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But is anyone else unhappy with the gearing of there car?
Whats the best (ie cheapest) way to improve it? I'd like to be able to hit 60 in 2nd ideally.
Cheers
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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twinturbo
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| posted on 15/9/04 at 09:50 PM |
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there's a pair of 2.0 4x4 Diffs on the Bay at the mo..
I know the seller and he's a SOUND chap..
Buy the pair and sell the front one on...
TT
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JoelP
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| posted on 16/9/04 at 07:15 AM |
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any chance of a link rob?
Beware! Bourettes is binfectious.
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twinturbo
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| posted on 16/9/04 at 08:50 AM |
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God!! do you expect all your slaves to do the hard work for you!!!
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=21654&item=2489799774&rd=1&ssPageName=WDVW
Guy is in peterlee in the north east..
He may be pursuaded to split them if you mail him..
Postage should be ok with www.postvan.com..
I sent one to France and it was not dreadfuly expensive..
TT
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Liam
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| posted on 16/9/04 at 06:29 PM |
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Oh my god I neeeeeeeeeeeeeeeeeeed that front diff!!!! Joel - you wanna bid and sell me the front, or i'll bid and sell the rear (or keep it).
Hmmmm. Whatever - lets make sure we don't have a bidding battle between us!
Liam
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twinturbo
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| posted on 16/9/04 at 09:17 PM |
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Are you using a 3.92 rear then Liam..
I have a few 3.62 fronts lying arround ...
TT
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JoelP
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| posted on 16/9/04 at 10:11 PM |
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cheers for the link TT, it was the plural diffs that stumped me when i searched! liam, you have u2u sausage.
Beware! Bourettes is binfectious.
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