Whats a strong setup for a wrx trans and 914 trailing arms. I know this is heavily discussed in the past but i need to know so i can stop wasting money. my last axels were a 914 outer Subaru inner with 914 axel but I destroyed the Subaru cv after a lil over 200hp on the dyno.can i buy stronger cv joints or do i have to peice a bunch of crap together

Go to 100mm cv joints early 911 and sway away axles. You could go 110 cvs but probably to heavy.

do these fit the wheel flange of a 4 lug

No. Talk to chris at tangerine racing. He might have something for four lug hubs

Keep in mind that the CV is a weak link, like a fuse. If you make the joint too stout it may just serve to over stress a more expensive link in the drive train.

If it was the inner Subaru joint that failed, changing the outer 914 joint does nothing to correct for you current failure.

I had the impression that the Subaru joints were stout and not likely to fail, especially before the 914 joint. If that is the case maybe your Subaru joint just died a natural death from age and wear and all you really need is a new Subaru CV.

I know nothing of the Subaru CV available or if there are stronger one out there.

Jim

Buy these and never buy another CV. Stop playing with little kid parts...

http://www.rcvperformance.com/product-deta...px?sku=301174CC

I run these, to do so you need sliding axles. But they allow up to 40° of articulation and are good to around 2000hp.

http://www.rcvperformance.com/product-deta...spx?sku=SI-15RF

YOu need to take that CV joint apart and see what happened. Post pics.

Mike - That's what I call OVERKILL...I like it - nice looking CV.

Tony

My CV's will never break. Everything else will...

That's a true statement with those...

T

I bought the RH ones... I think they are bus cv's? Seem pretty tough so far.
Mikes solution is a sweet one! I want these for my Boxster S transaxle conversion!

That cv joint is awesome maybe one day

Ok so the cv ended up eating the c clip and getting stuck in an extended position so maybe the axel is too short? i only bring up the inner because i dont want it to fail under 250hp but maybe that will come when my 5 lug conversion does. As for the Subaru cv now that ive replaced it ill drive on it and see what happens.

Your not making enough power to break those axles. If you replaced with new I bet you would be just fine. Old axles break, thats just what they do!

Jack up the car and compress the suspension, Is there slack in the CV's (Can you move the axle back and forth? on both conditions? If not then yes your axles are too short. Conversely if they are parallel with the ground and they dont move they are too long.

i am useing 944 cv's in my ls1 car no problems



jerry

944s are plenty strong as well. 944 turbo guys dont upgrade their axles when running big power. They are essentially the same axles as the Bus cv joints.

Ive come to the conclusion my driver side axel is too short at 17 3/4" with a subaru trans but how do i tell how long it will need to be extended

Check out this site and these grease rings. You can put one on the CV and gain 7/16" in effective axle length. Just remove the zerk, cap the hole and place between CV and wheel stub. This site also has a page telling how to measure axle length.

http://www.pacificcustoms.com/grease-rings.html

I use one of these rings with 4 magnets inset to drive my speedometer for my 6 speed. You just need slightly longer axle bolts. Best prices for those is boltdepot.com

Can you believe...after commenting on this thread, I blew my first CV!!! The worst part was to be my 17-year old son's first time on the track with hot laps (all weekend). Bummed for him - 3 laps into the weekend, kaboom!

Confession: I have done three burnouts in the last couple months - most recently with a member here visiting Atlanta last week. Words to the wise - if you want your drive-train to survive with 600 hp - do not shock load it. I know better and I paid a high price. Out of state, entire family, motorhome, etc. 3 laps (one of those was a warm up)!

I have it on video and will share if I can edit it down...

Tony

I can recommend come CV's for you...

There are in situ Subaru's running around with very-big HP and torque numbers. They aren't grenading CV joints. Yours were probably just miled out...

Being that I will be installing a suby 3.3 starting very soon,..I need a good axle set up,..iam using the 901 tranny with 4 bolt axel for now, what off the shelf set-up should I buy,.?? Thanks..Hope I didnt Hi-jack this thread.. Thanks Frank

The c clips pop out pretty easily if the axles are in the wrong spot (I had two fail on the way to RRC). Are you running Coldwater axles? I have found that you need to find a way to keep them from sliding too far outward or that happens.

famn what is it with 17 yearolds and cv joints ive broke two in three days lol

no custom made ones definitely too short

18" is probably about the shortest you can do.

I run custom axles from local cv shop with 930 cv's.
They shaved the cages smooth and upgraded balls and grease.
Zero problems on Ls1 boxster s trans.

CVJ axles by any chance? Mine were 930's; race prepped and ARE taking ALLOT of abuse. Loads of torque (slicks, hooking up, downforce, blah, blah, blah, boom)! These would have lasted a decade or more in a hot-rod...

Makes it a pressure cooker to get to Okteenerfest now!

Tony

Failure on video...it could have been much worse (wall, pit, another car, etc)! I was very fortunate.


https://www.youtube.com/watch?v=KbqbYF30D7g

mine are 17.75 rn I figured I should get .5" longer ones but is there a good way of knowing for sure

With the suspension loaded...you want 3/4"-1" of "play/travel" in and out - to be safe.

Tony

Interesting modifications. Makes sense.

thanks!