Rob Turbo 3 Posted November 28, 2008 I've decided to go for a v6 in my 306, I'm off to pick one up tomorrow. I know the shafts will need shortening, I'll mark them up, chop them with a grinder, then true them up in the lathe, that's the easy bit, now what do you do to make sure they stay lined up 100% for welding? I thought about making a tight fitting bung to press into one side, press the two halves together, then weld away. Is there an easier way or is this the way forward? Next question, could I mig weld them, or does it need to be done with a tig? How thick is the shaft? And finally, when I true the ends up, should I keep the ends flat or taper them so that when they are put together there's a groove all the way round, then fill the groove up with weld? Any other advice on the subject? (Either shaft shortening or v6 fitting!!) Thanks, Rob Share this post Link to post Share on other sites
welshpug 1,661 Posted November 28, 2008 I believe that they may not actually need shortening for the 306. But if I'm wrong and they do, I do believe Colin Satchel aka Eeyore can do them. The 406 shafts (as are many larger engined 306's) are hollow, so yes you would press an insert of some sort in to keep them straight, you would ned to vee the join between them to gain good weld penetration. any other advice? Ask those who have done it before (Hilgie and Jeram are the only two I know of that are on the forums) Share this post Link to post Share on other sites
Rob Turbo 3 Posted November 29, 2008 I'll offer them up against the 306 shafts once I get them off the car, fingers crossed they fit straight on!! I'll not get my hopes up though! Thanks, Rob Share this post Link to post Share on other sites
Rob Turbo 3 Posted November 29, 2008 Back to an earlier question, saying they need shortening, I chop them etc. can I mig them? I'm a decent welder, I trust my work, but can a mig join the 2 halves well enough to cope with the stresses the shafts will take? Share this post Link to post Share on other sites
maxi 36 1 Cars Posted November 30, 2008 Back to an earlier question, saying they need shortening, I chop them etc. can I mig them? I'm a decent welder, I trust my work, but can a mig join the 2 halves well enough to cope with the stresses the shafts will take? Nope! Im stuck in the same problem at the mo and after having a pair of shafts snap at about 7000RPM (Smashed gearbox casing, damaged bulkhead, etc etc) I know how important it is to have them bang on. If you find a company that will do it give me a shout and visa versa. Maxi Share this post Link to post Share on other sites
welshpug 1,661 Posted November 30, 2008 a propshaft re-conditioners may be able to help, I have heard of people using services like these to get custom shafts done. Share this post Link to post Share on other sites
Rob Turbo 3 Posted November 30, 2008 Nope! Im stuck in the same problem at the mo and after having a pair of shafts snap at about 7000RPM (Smashed gearbox casing, damaged bulkhead, etc etc) I know how important it is to have them bang on. If you find a company that will do it give me a shout and visa versa. Maxi How did you do yours? did you make a bung to keep them lined up or anything and were they just mig'd? Any photos? I'll probably chop them, line them up with a bung then take them down to my mate with a tig or take them to a fabricators or something. Share this post Link to post Share on other sites
maxi 36 1 Cars Posted November 30, 2008 How did you do yours? did you make a bung to keep them lined up or anything and were they just mig'd? Any photos? I'll probably chop them, line them up with a bung then take them down to my mate with a tig or take them to a fabricators or something. Thats the thing, I havent done mine! I snapped a pair of std ones. Potentially if your weld dosent hold up, the shaft will snap and its like a sledgehammer going round. It mullered my gearbox, lower arm, subframe and twatted the bulkhead. Imagin f it hit your engine block, that would be the end of the engine. Seems a shame to risk all the work for lashing a set of shafts?? Maxi Share this post Link to post Share on other sites
Rob Turbo 3 Posted November 30, 2008 (edited) Hmm, I suppose! What I could do is put a long bung in, a good fit but just tight enough so it can still be turned inside the shaft with a bit of force, that way, if it ever does snap, there will be something to hold the 2 halves together, I'll just loose drive. I'll still look into getting them done properly though, it would still be a ball ache to strip everything down just to get the shafts out to re weld, even if they don't do any damage! Edited November 30, 2008 by Rob Turbo Share this post Link to post Share on other sites
jonnie205 1 Posted December 2, 2008 i would get a prop shaft manufacturers to do it, prope are cheap to have made so its prob best to get them to make a whole new bar in your required length Share this post Link to post Share on other sites
welshpug 1,661 Posted December 2, 2008 Here you go Rob - http://www.commercial-propshafts.co.uk/ look like the ideal people to speak to. Share this post Link to post Share on other sites
danpug 1 Posted December 2, 2008 I do believe Colin Satchel aka Eeyore can do them. Yep and they have been tried and tested and haven't failed. They are also a nice sensible price. Share this post Link to post Share on other sites
welshpug 1,661 Posted December 2, 2008 I think it was on Garry's Supercharged gti6 thread that was mentioned, certainly a test against torque there Share this post Link to post Share on other sites
