My LS1 Miata build
I do not know the root cause of the failure, it could be that the boot busted and the joint dried up or it could be that the cage or bearings couldn't handle the abuse. I will take it apart and try to determine the failure mode. Dan at Racing Concepts is willing to help me out to get it replaced. More to come....
I thought thats pretty common on those cars if you bring them up to high speed. Something about too much grease in the boot busts the boot because of the centripital force when doing well over 100.
Would love to see how this car stacks up against a similarly set up swapped FD.
I have also sent my axles to Gator Racing Axles to polish the miata cv cups and put on low profile boots. I haven't had my boots bust since I put zip ties on them but I figured this was cheap insurance.
I've also done one with the boss frog kit.
http://www.swaptastic.net/answers.html
The Best V8 Stories One Small Block at Time
In the wet: http://videos.streetfire.net/video/N...ack_709310.htm
Tearing it up in the dry: http://videos.streetfire.net/video/N...ack_709311.htm
Planning on getting into spec miata racing next season.
Nathan, your site is my primary source of information at this time.
I still have a few concerns right now...
I'm up in the air about the three kits. I plan to use the forward mounting location. I can cut the corners, but not rebuild the firewall.
Bossfrog seems the most expensive of the three. $1600+ for axles scares me.
V8R kit is nice, but the welding of the rear turns me away... should I just suck it up, and have it welded by a shop?
Racing Concepts... I've read all the threads- I could not care less about racing concepts' history. I just want to possibly buy a few pieces of metal from them. They **** off their customers, but is their mount kit really that bad?

Racing Concepts doesn't exist (except in cyberspace), you won't be getting any parts from them. BF quality is marginal at best.
A shop can easily weld the diff mount or find a friend with a welder.
V8R it is. $4,695.00 for the forward mount kit, stage 1 axle kit, screw on filter oil pan, clutch kit, and the upgraded getrag bushings.
(what oil pan is prefered, im not exactly sure of what setup is what.)
At that point, i need an ls1 or ls1, a t56, the getrag (what one?) and a few thousand dollars of odds and ends (cooling, eletrical, fuel system)





Technically, the CV did not break. It's almost impossible to break a CV joint until it leaves the housing & slams against the ground. What broke was the spindle input shaft on the spindle end of the CV joint. Would expect the stock Miata shaft to break since even stock Ford's break. Although, on the Ford's it's the halfshaft usually, not the spindle stub. ls1_miata knows what I'm talking about.



