rally car snapping shafts, what are my options?
#1
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rally car snapping shafts, what are my options?
Hi Guys
I keep snapping rear shafts in my rally car and would like to upgrade them to prevent this happening again. The car is a classic, tarmac car using R180 rear diff, hubs and shafts. DCCD set to open. At the last event I basically got the tyres warm and snapped one, then got aloud out to play later in the day and exactly the same thing happened again. It happens when the wheels spin and then grip, then a shaft lets go, always in second gear.
Here are some pictures, this is typical of every shaft I have broken:
I have done some research and found several different options:
GKN ~ £1200 each. pretty much indestructible
Driveshaft shop ~ £650+ postage and tax from America
DJM ~ £400, no CV joints. 30% stronger material
Does anybody have any experience with any of the above manufacturers? Or can you recommend somewhere else?
Cheers
Tom
I keep snapping rear shafts in my rally car and would like to upgrade them to prevent this happening again. The car is a classic, tarmac car using R180 rear diff, hubs and shafts. DCCD set to open. At the last event I basically got the tyres warm and snapped one, then got aloud out to play later in the day and exactly the same thing happened again. It happens when the wheels spin and then grip, then a shaft lets go, always in second gear.
Here are some pictures, this is typical of every shaft I have broken:
I have done some research and found several different options:
GKN ~ £1200 each. pretty much indestructible
Driveshaft shop ~ £650+ postage and tax from America
DJM ~ £400, no CV joints. 30% stronger material
Does anybody have any experience with any of the above manufacturers? Or can you recommend somewhere else?
Cheers
Tom
#2
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have you seen the ones boosted made for his car?
https://www.scoobynet.com/projects-4...12-second.html
his whole setup is pretty unique but might give you some inspiration?
https://www.scoobynet.com/projects-4...12-second.html
his whole setup is pretty unique but might give you some inspiration?
#3
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HI
Looks like they are snapping on the undercut , was having the same issues with my old Golf , every event I was snapping them , even taking care on bumpy bits.
Tried Drivelink shafts , cost me £900 odd quid for a pair of shafts with inner and outer joints , and a full set of spare joints , snapped them on the first event , they couldn't understand why , made me another pair of shafts F.O.C and they snapped on the next event.
Was told about Berrisford who advertise there shafts as guaranteed unbreakable , gave them a try and never broke one since
http://berrisford.co.uk/index.php/driveshafts.html
Very sensible costs as well , give them a try , my son also had them made for his 205 and they were perfect on that as well
Send them shafts and joints to copy the bars , they make the splines so they bottom out on the splines in your joints so no need for lips or undercuts on the bars which usually ends up a weak spot, and they make them to order , takes about 4 weeks
Cheers Ian
Looks like they are snapping on the undercut , was having the same issues with my old Golf , every event I was snapping them , even taking care on bumpy bits.
Tried Drivelink shafts , cost me £900 odd quid for a pair of shafts with inner and outer joints , and a full set of spare joints , snapped them on the first event , they couldn't understand why , made me another pair of shafts F.O.C and they snapped on the next event.
Was told about Berrisford who advertise there shafts as guaranteed unbreakable , gave them a try and never broke one since
http://berrisford.co.uk/index.php/driveshafts.html
Very sensible costs as well , give them a try , my son also had them made for his 205 and they were perfect on that as well
Send them shafts and joints to copy the bars , they make the splines so they bottom out on the splines in your joints so no need for lips or undercuts on the bars which usually ends up a weak spot, and they make them to order , takes about 4 weeks
Cheers Ian
Last edited by Godspeed Brakes; 02 July 2015 at 11:28 AM.
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Was told about Berrisford who advertise there shafts as guaranteed unbreakable , gave them a try and never broke one since
http://berrisford.co.uk/index.php/driveshafts.html
Very sensible costs as well , give them a try , my son also had them made for his 205 and they were perfect on that as well
http://berrisford.co.uk/index.php/driveshafts.html
Very sensible costs as well , give them a try , my son also had them made for his 205 and they were perfect on that as well
Hey Ian, thanks for the reply
On the golf or WRC?
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have you seen the ones boosted made for his car?
https://www.scoobynet.com/projects-4...12-second.html
his whole setup is pretty unique but might give you some inspiration?
https://www.scoobynet.com/projects-4...12-second.html
his whole setup is pretty unique but might give you some inspiration?
I haven't seen this thread, i'll have a read through when I get a minute, thanks for the link
#6
I feel your pain 😂😂😂
The problem arises with factory shafts, the cost to manufacture them was as cheap as subaru could do it, also age plays a part on shafts now. Apparently they should only ever transmit power in one direction too (maybe an old wife's tail) so OS and NS shafts to remain on said sides.
The Berisford shafts are probably your cheapest and easiest option, the joints are unlikely to fail.
The problem arises with factory shafts, the cost to manufacture them was as cheap as subaru could do it, also age plays a part on shafts now. Apparently they should only ever transmit power in one direction too (maybe an old wife's tail) so OS and NS shafts to remain on said sides.
The Berisford shafts are probably your cheapest and easiest option, the joints are unlikely to fail.
Last edited by boosted; 02 July 2015 at 11:49 AM.
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#10
I'm lead to believe gun drilled solid from 4330 material is the strongest. You are unlikely the get this though.
Berisford will use a heat treatable steel and actually roll the spines on rather than cut them, then heat treat them.
I made mine from 4145 steel, machined the splines, no heat treatment.
Berisford will use a heat treatable steel and actually roll the spines on rather than cut them, then heat treat them.
I made mine from 4145 steel, machined the splines, no heat treatment.
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I just got off the phone to Berrisford, for those interested,
The material they make shafts from is 300M http://www.suppliersonline.com/propertypages/300M.asp
The shafts are £160/each+VAT
They haven't seen any failures from the rally cars they have supplied
They don't recommend 'gun' drilling
The material they make shafts from is 300M http://www.suppliersonline.com/propertypages/300M.asp
The shafts are £160/each+VAT
They haven't seen any failures from the rally cars they have supplied
They don't recommend 'gun' drilling
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