XR4Ti build, possible future Rally car?
Posted by dunhamr1
John Vanlandingham Mega Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Right.. It is the ONLY Japanese axle that a) is big enough that there is a YUUUUUUGE margin of safety and b) that you might just get a LSD in 98% of-a clutch plate diff--- c) if lucky get the ratio you need for a road car--3,73 or 3,9 or depending if you got the right gearbox even the 4,3 which came in ALL YEAR Automatics (and in the case of Volvo w same guts in a solid axle there are units out there with nice ratios for even n.a. cars like 4,63 or 4.88 d) ONLY Japanese axle you can get such a wide range of ratios for cheap...as cheap as US ring and pinions e)STRONG output flanges,,Ford 9 inch size stub axles--no breaking them as those poor guys who drank the weak German cool aid and bought BMWs who keep breakin' stub shaft or output flanges again and again. Can't do any alternate ratio of all those nice Nissan diffs short enough for n.a for less than one million dollah. Also: *there IS easy parts to hook up propshaft because of it's popularity---not so for other Japanese of the little German diffs 
* those yoke accept a BIG 1310 u-joint, one of the most common in America on the shelf in every Napa, O'Reilly's, Auto Zoo. Easy replaceable..Not so with any other Japanese or the little German diff
*there are adaptors available to hook up the US market CV joints and the larger desirable bigger CV off the Cosworth 2wd cars--which is same size as 911 Turbo...Not so with any other Japanese or the little German diff
*there is a nice kit to bolt the diff itself in already sold in the scores and scores and scores. Not so with any other Japanese or the little German diff John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
That diff is too new, not the one you want. That one probably looks like this 
The one you want looks like this. Think they came in 1986 - 1992 MK3 supras 
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Ryan Dunham Mod Moderator Location: Hurst, TX Join Date: 09/17/2015 Age: Settling Down Posts: 158 Rally Car: 1989 Merkur XR4Ti |
Any ratio? I know there's more optimal (4.3) but what else is decent? If one pops up for cheap but has a different ratio, I should still go for it? |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
John Vanlandingham Mega Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
Ryan Dunham Mod Moderator Location: Hurst, TX Join Date: 09/17/2015 Age: Settling Down Posts: 158 Rally Car: 1989 Merkur XR4Ti |
So if I could get a 3.91 LSD, with the right housing, for $200, or together with an open 4.3 for $300 that would be reasonable (but not cheep)? Worth looking into, or wait for something less spendy? |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
Might be worth looking at. Should be close to you.
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Ryan Dunham Mod Moderator Location: Hurst, TX Join Date: 09/17/2015 Age: Settling Down Posts: 158 Rally Car: 1989 Merkur XR4Ti |
Hmmm that definitely seems worth looking into, it says it's the 4.3 LSD. Just over an hour's drive away, not bad at all. |
John Vanlandingham Mega Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Print out a photo so you get the right thing. 5 speed TURBO should be 3,73 or 3,9... AUTOMATIC turbo andnon-turbo 5 speed is 4,3 originally But who can say now what's actually in any given car. so Look for sticker "LSD OIL ONLY" Spin test Count turns. The difference 3,9 to 4,3 is obvious.. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
John Vanlandingham Mega Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Thomas Kimsey Professional Moderator Location: Rochester, New Hampshire Join Date: 10/05/2013 Age: Settling Down Posts: 271 Rally Car: 1988 XRatty |
John Vanlandingham Mega Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
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