Joel K
Supporter
Got a question for those familiar with Porsche 930 CV joint axles.
I am about to install my axles in the SLC with a Graziano transaxle. I moved the engine/transaxle back about 1.5” in the chassis and just want to make sure the axles provided in the kit can still be used as is without adding spacers or ordering longer axles.
If I did not move the engine back the transaxle flanges would be about 1/2” in front of the wheel flanges. Now they are 1” behind. I used a triangular calculator just to see how the axle length could change. Based on the calculator the shorter axle would need to be only .03” longer so I am thinking that shouldn’t be an issue.
What complicates things is that my chassis is 10mm wider than a few of the other builders. Found this out when the front and rear engine mounts did not fit. This puts the lower control arms out a bit wider than normal. So considering this I wanted to double check if I am still good to go.
As delivered by the drive shaft shop the Passenger side axle is marked as 16”, and the Driver side marked at 19.5”
I measured them compressed and they are 15.5” and 19”. Fully expanded they are 17.125” and 20.625”. I measured them with the cv grease cap still on the CV joint but figure my numbers are within 1/16”. Also, what I think expands is the CV joint itself rather than the axle sliding in the CV joint if that makes sense.
Anyway, I installed the axles in the car and took some measurements of how much play they have. This is what I found…
Since the axles can be expanded 1.62”, I figured the passenger side lines up with the CV joints pretty much centered and the Driver side with the CV joints pulled in about 1/8” on each side.
Anyway, I appreciate any help on the subject. Thanks!
I am about to install my axles in the SLC with a Graziano transaxle. I moved the engine/transaxle back about 1.5” in the chassis and just want to make sure the axles provided in the kit can still be used as is without adding spacers or ordering longer axles.
If I did not move the engine back the transaxle flanges would be about 1/2” in front of the wheel flanges. Now they are 1” behind. I used a triangular calculator just to see how the axle length could change. Based on the calculator the shorter axle would need to be only .03” longer so I am thinking that shouldn’t be an issue.
What complicates things is that my chassis is 10mm wider than a few of the other builders. Found this out when the front and rear engine mounts did not fit. This puts the lower control arms out a bit wider than normal. So considering this I wanted to double check if I am still good to go.
As delivered by the drive shaft shop the Passenger side axle is marked as 16”, and the Driver side marked at 19.5”
I measured them compressed and they are 15.5” and 19”. Fully expanded they are 17.125” and 20.625”. I measured them with the cv grease cap still on the CV joint but figure my numbers are within 1/16”. Also, what I think expands is the CV joint itself rather than the axle sliding in the CV joint if that makes sense.
Anyway, I installed the axles in the car and took some measurements of how much play they have. This is what I found…
Suspension position | Ride height | Passenger Axle Movement | Driver Axle Movement |
At Ride Height | 4.65” | .75” | .56” |
At some Compression | 2.65” | .875” | .625” |
At Full Droop | 6.15” | .625” | .5” |
Since the axles can be expanded 1.62”, I figured the passenger side lines up with the CV joints pretty much centered and the Driver side with the CV joints pulled in about 1/8” on each side.
Anyway, I appreciate any help on the subject. Thanks!
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