4RnrRick Posted October 22, 2004 Share Posted October 22, 2004 Just curious if any of you guys have tried Cryogentic Treatment of your CV's to make them stronger? Bobby Long (www.toyotasuperaxles.com) does this for the Birfield Joints on Toyotas and Samura's with GREAT sucess. Heck I'm running them in my Yota. And I'm just curious if the Subaru guys have tried anything like that... I guess my reasoning for asking is I HATE carnage on the trail and I'm really concerend about that if I buy and build a Subie..... Link to comment Share on other sites More sharing options...
WJM Posted October 22, 2004 Share Posted October 22, 2004 I should look into that before I shatter an axle on an autocross course... Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted October 22, 2004 Share Posted October 22, 2004 Not really the axles themselfs that are the weak point, its the cups at either end, and the inners that go 1st. Then the Diff stub's... the axle shaft itself seems to hold up to almost anything. -Brian Link to comment Share on other sites More sharing options...
bushbasher Posted October 22, 2004 Share Posted October 22, 2004 well Ive had 1 axle shaft explode in my driveway but it seems that was a very freak occurance. I had a post before about cryo treating cvs and stubs but didnt get much of a response. I was talking to a guy on Pirate4x4 who runs a cryo business in Cali. http://www.performancecryogenics.com Link to comment Share on other sites More sharing options...
bajavwnsoobnut Posted October 23, 2004 Share Posted October 23, 2004 if I ever snap one on the 76 I might try to find a new set of rear shafts and do that but for me the rear shafts on the 76 are basicaly datsun/nissan shafts with u-joints instead of cvj's but might think of the front halfshafts though considering it's gonna get alot of abuse when I get it going again for rallycross Link to comment Share on other sites More sharing options...
4RnrRick Posted October 23, 2004 Author Share Posted October 23, 2004 I am refering to the actual CV's and not the shaft beween them. A birfield in a Toyota looks like this: The weak spot on these use to be the bell. People fixed that by welding a small ring to the outside lip of them Then the guts starting to go and then Bobby Long started welding rings on them and cryo treatment of them. For the Toyota Axles this meant you could run 35"s -38" without failures. Now Bobby just released a new 30 spline chromoly birf that has been tested to be as strong as a 35 spline Dana 60 stuff. Also for the guys that are running U-joints in there axle. CTM came out with cyro u-joints that don't have needled bearings. They look kinda like this: Also I guess almost every professional motor sport now from indy cars to lawnmower racing uses cryotreatment of parts to make them stronger. Hence my question if anyone has tried this for you Subie Guys in making a strong CV. I also nee to admit that I don't know what the guts of a Soobie CV looks like. Can someone post or link a picture. a Broken one would also be nice to see...... Below is what a Stock Birfield looks like after they bust..... Link to comment Share on other sites More sharing options...
idosubaru Posted October 23, 2004 Share Posted October 23, 2004 i had a newer CV joint blow apart last summer on my XT6 and someone else on the xt6 site just had a brand new one with like 10 miles on it blow apart as well (like within the past week). sounds more common than i thought, not exactly the kind of part you want failing. really confused my AWD. lock up - no don't do it - lock up - wait maybe i should'nt - let's try locking up. i hit my toggle switch to lock up the transfer clutch to get me to a parking spot. would really suck for this to happen on a FWD. Link to comment Share on other sites More sharing options...
ezapar Posted October 23, 2004 Share Posted October 23, 2004 Hence my question if anyone has tried this for you Subie Guys in making a strong CV. I am refering to the actual CV's and not the shaft beween them. I blew an outer one last week, driving around the block. It was only 3-4-- miles old, a re-man though. "New" axles don't exist as far as I know, so I wonder how much cryo treatment an old re-man could take. I've only blown one outer up untill that one. The inners go from timre to time, but that's usually after running it with a torn boot and it getting mud and stuff in it. The weak spot on these use to be the bell. People fixed that by welding a small ring to the outside lip of them Then the guts starting to go and then Bobby Long started welding rings on them and cryo treatment of them. We call the "bell" the cup. They do explode from time to time, Scott Subarubrat welds something around them to beef them up, he'd be teh guy to ask just what and how. Also I guess almost every professional motor sport now from indy cars to lawnmower racing uses cryotreatment of parts to make them stronger. USMB = professional motor sport? Hence my question if anyone has tried this for you Subie Guys in making a strong CV Like I said, I think only Scott has gone and done it. But the next thing to go are the stub axles coming out of the diffs. And after that, the spider gears themselves. . . As for carnage, I can swap in a front axle and have the car ready to go in about 25 minutes. + or - a few. Thre rear in about 5. If the stub axle breaks off inside the diff, then it's a bit of a pain in the rump roast. I'd rather swap an axle. The ones I have have a lifetime warrantee. Link to comment Share on other sites More sharing options...
bushbasher Posted October 23, 2004 Share Posted October 23, 2004 Pretty much everything that you can do to strengthen a birfield should work on a subaru cv because the type of joint is identical. The Inner joint is a DOJ which is very similiar to a CV but the ball/cage slide back and forth in a cylindrical bell, to allow change in length of the halfshaft. Im sure the same methods could be used to strengthen these as well. Awhile ago I was considering talking to Travis Rankin cause he does the "smurfields", he could probably do wonders for my cvs as well. Link to comment Share on other sites More sharing options...
4RnrRick Posted October 23, 2004 Author Share Posted October 23, 2004 Yeah, Smurfing them might also help since a lot of the candians have there birfs smurf'd because he doesn't charge very much. But I consider Bobby long to be in the inovator of using this treatment on Birfields so thats where I recommend people to go and thats where I got my Longs for the Toyota. As for "new" joints verses "old" joints. For the Toyota stuff the OEM joints are FAR superior so most of the Longfields are just used OEM toyota birfs that have been inspected and then modified by Bobby Long. So it sounds like the same type of process could be done to the weak parts in a Subie. I guess the only problem being that it would be hard to find nice front CV's since they are alsways turning unlike a Toyota front axle. Link to comment Share on other sites More sharing options...
bajavwnsoobnut Posted October 23, 2004 Share Posted October 23, 2004 hmmm I wonder if I can get my hands on a new CVJ or 2 and a DOJ or 2 and take them to work and have them put in the chiller for a few Link to comment Share on other sites More sharing options...
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