Turn & Burn
Club Member
Thought I’d share this project.
I’m aiming for 250bhp on my engine build so I thought I’d upgrade to CVs. I’ve not chopped up anything crucial doing this so if it doesn’t work I’ve lost nothing but a couple of afternoons playing in the garage on the lathe. Part of what prompted this was upgrading the diff internal to S15 helicals which requires you to use the S15 stub shafts and which have a 3x2 pattern flange.
I’ve used Sierra CVs as used on early Cossies, they’re dead cheap, and machined up adaptors for each end to go from the Nissan flanges onto the the Sierra Cv. All it needs now are shortened shafts, but until I assemble everything I don’t know what length I’ll need, it looks like these are the only bits of the build that may cost. You can get a Sierra shaft for £30, but it costs a lot to either shorten or get custom length shafts made. Currently looking at about £150/shaft.
In the pictures the gold coloured adaptors were made in steel and passivated, but the second batch of silver ones are aluminium which is an easier option, I may remake the steel ones. The gold adaptors would suit anyone wanting to do a cv upgrade, you would need 4 off adaptors plus the CVs and the shafts. Even with expensive shafts I reckon it could be done for about £600.
I’m aiming for 250bhp on my engine build so I thought I’d upgrade to CVs. I’ve not chopped up anything crucial doing this so if it doesn’t work I’ve lost nothing but a couple of afternoons playing in the garage on the lathe. Part of what prompted this was upgrading the diff internal to S15 helicals which requires you to use the S15 stub shafts and which have a 3x2 pattern flange.
I’ve used Sierra CVs as used on early Cossies, they’re dead cheap, and machined up adaptors for each end to go from the Nissan flanges onto the the Sierra Cv. All it needs now are shortened shafts, but until I assemble everything I don’t know what length I’ll need, it looks like these are the only bits of the build that may cost. You can get a Sierra shaft for £30, but it costs a lot to either shorten or get custom length shafts made. Currently looking at about £150/shaft.
In the pictures the gold coloured adaptors were made in steel and passivated, but the second batch of silver ones are aluminium which is an easier option, I may remake the steel ones. The gold adaptors would suit anyone wanting to do a cv upgrade, you would need 4 off adaptors plus the CVs and the shafts. Even with expensive shafts I reckon it could be done for about £600.