froggy
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| posted on 17/11/13 at 09:35 PM |
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Help needed on rear driveshaft length .
I will be having some shafts made to replace my sleeved items which are at risk of snapping now I'm winding the boost up . The only reference to
shaft length I can find is to make the shaft 16mm shorter than the distance between the deepest part of the cup .
If anyone can check on a lobro jointed rear end it should have around 16-20mm float in the shaft if the drawing is right and will be a big help as the
shafts are not cheap if I get the size wrong .
[IMG]http://i144.photobucket.com/albums/r187/froggy_0[IMG]
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madteg
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| posted on 17/11/13 at 09:59 PM |
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I had this problem, i moved the cir clip groves back by using a grinder with a 1.5mm silting disc in a lathe. then cutting the excess of. Job done now
i have standard shafts shortened. Hope this helps.
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jacko
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| posted on 17/11/13 at 10:04 PM |
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http://www.super7thheaven.co.uk/Sierra_Rear_Drive_Shafts
Any thing on here that will help you ?
Jacko
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Minicooper
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| posted on 17/11/13 at 10:08 PM |
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Why can't you use your welded shafts as a guide.
Cheers
David
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froggy
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| posted on 17/11/13 at 10:56 PM |
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I messed up with the length as the Inner cup is the Saab stub with a spigot welded on but I didn't make the spigot thick enough to match the
depth of the outer cup
It's not been an issue until I got to 1.4 bar which is around 400lb/ft
[IMG]http://i144.photobucket.com/albums/r187/froggy_0[IMG]
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CNHSS1
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| posted on 18/11/13 at 02:59 PM |
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if they are sierra based and you need shorter shafts, the Scimitar SS1 has some as std.
they have push-in ends normally, but you can remove the shafts and fit bolt on CVs either end.
I know you are going to ask me the lengths are, and I cant remember, but if you give me a day or so, I will dig a pair out and check for ya! 
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
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scimjim
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| posted on 18/11/13 at 03:35 PM |
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quote:
Originally posted by CNHSS1
if they are sierra based and you need shorter shafts, the Scimitar SS1 has some as std.
they have push-in ends normally, but you can remove the shafts and fit bolt on CVs either end.
I know you are going to ask me the lengths are, and I cant remember, but if you give me a day or so, I will dig a pair out and check for ya!
470mm rings a bell?
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froggy
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| posted on 18/11/13 at 03:54 PM |
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Mine are only a foot long so just need to see how much end float they have using a standard shaft length , gb engineering have confirmed that the 16mm
float is right so my current shafts are way too short .
Had a search on here as I was looking at going up to 108mm joints but as I don't have a lot of travel or ankhs change to deal with the 100mm
joints should do fine .
[IMG]http://i144.photobucket.com/albums/r187/froggy_0[IMG]
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CNHSS1
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| posted on 18/11/13 at 04:01 PM |
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if you need joints with lots of angular movement coz you've only got dinky driveshafts, speak to the Autograss boys, they do lots of bolt on CVs
with silly-large angles of deflection.
Try Randall Motorsport or Berrsiford
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
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scimjim
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| posted on 18/11/13 at 04:34 PM |
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quote:
Originally posted by CNHSS1
if they are sierra based and you need shorter shafts, the Scimitar SS1 has some as std.
they have push-in ends normally, but you can remove the shafts and fit bolt on CVs either end.
I know you are going to ask me the lengths are, and I cant remember, but if you give me a day or so, I will dig a pair out and check for ya!
I seem to remember that the GW Sabre ate 25 splined driveshafts for a pastime (probably with a smidge less than 400 lbft)?
What torque does your new Sabre put out?
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froggy
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| posted on 18/11/13 at 04:56 PM |
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Ride height to full bump is only 8 degrees so its worth trying the 100mm joints .
[IMG]http://i144.photobucket.com/albums/r187/froggy_0[IMG]
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CNHSS1
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| posted on 18/11/13 at 05:38 PM |
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quote:
Originally posted by scimjim
[
I seem to remember that the GW Sabre ate 25 splined driveshafts for a pastime (probably with a smidge less than 400 lbft)?
What torque does your new Sabre put out?
GWs Scim Sabre never had the power it was quoted with imho, but it did eat trilobe driveshafts back in the day. I think it was a combo of flexing rear
trailing arms (lighteweight small diameter tube versions of std) and the fact that the diff cradle was bent! I have some pics somewhere Jim
so long as the diffs firm and theres no flex in the suspension at the wheel end, I don't think the OEM Ford or Scimitar (made by Hardy Spicer)
assemblies will fail. I suspect that the mighty Kitten will suffer same as our cars, and that its traction that's limiting!
Not sure what current sabre is, 361hp and im guessing mid 300s ft/lbs. Driveshafts are fine, but its eating soft 888s!!
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
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froggy
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| posted on 18/11/13 at 06:12 PM |
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My n/s shaft has 35mm float and o/s 20mm just need to pull the outer cups out and compare depths with my home made adaptors but i was getting enough
movement of the rear beam to push the gearbox cup into the box and wear the carrier
[IMG]http://i144.photobucket.com/albums/r187/froggy_0[IMG]
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CNHSS1
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| posted on 20/11/13 at 09:50 PM |
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Ive stripped one driveshaft, L/H longer one
I reckon its 410mm between the outer circlip grooves.
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
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