After 5 months in hibernation, I finally got the car to the shop to rework the fuel system. After we got everything squared away, I went out to do a quick test drive to make sure the fuel pressure alarms are set correctly. Drove the car about 5 minutes and on the way back to the shop got on the power in third gear to get a good fuel pressure log under boost. As soon as the boost hit I heard a loud bang and lost all power coasting into an empty parking lot. Initially I thought something in the engine had failed as the dash lit up with an "over rev" warning. The engine however continued to run fine but there was no transfer of power to the wheels. The over rev was simply the enertia of the accelerating engine taking it through the fuel cut off limiter. Since I was only 1/4 mile from the shop it only took 15 minutes to get towed in and up on the lift. It quickly became apparent that the left gearbox output flange had failed. The failure is pretty amazing considering the thickness of steel in the failed area which in this case only sees torque and no lateral G, unlike wheel hubs which I seem to be eating for breakfast also. While at it we are going to swap out the right flange also. Luckily my shop has these on hand so we should have this wrapped up tomorrow as I'm scrambling to get the car ready for a track event this weekend. Looks like this is just another item I'm adding to the precautionary 2 year replacement along with the rear hubs. The flanges are relatively cheap and something to consider as precautionary replacement for the guys with higher horsepower who track these car's heavily. Metal fatigue eventually rears it's ugly head on 15 year old parts. The only good thing is these are just about the last parts that have not yet been swapped on my car's drivetrain.

[url=https://flic.kr/p/FtJ8e4]

[url=https://flic.kr/p/GfQK2U]

[url=https://flic.kr/p/Giabor]

[url=https://flic.kr/p/Giab48]

 

Wow you really do break a lot of stuff lol. Does anyone make like a 300m shaft pieces that are stronger?

 

I have a company that will likely be making hubs for me out of 300M. Might have them look at doing these also. Interestingly I've never had any issues with axles but I replaced those last year. Cup cars on the other hand go through axles frequently.

 

Nice, something I may have to look into when I build the trans on my car. Axles I thought about upgrading but then I thought about it, I'd rather break and axles than a gear in the trans.

 

wow that's crazy, mine usually break in a clean cut.

i have some upgraded ones if you are interested.

 

hey at least it happened on the street not on track. crazy.. GL at the track

 

Wow, looks nasty. GLW it John

 

Ouch Hound! If someone's going to push it to the limit, its you!


ProdigyMB, mind sharing what your upgraded version is?


Thanks,

 

Do tell...

 

chromoly heat treated etc...

 

Gotcha. So you had the flange machined out of Chromoly or simply had the OEM part heat treated? Off topic Mark, can you please send me the jet pump for the tank? I havent heard back from you. I'm gonna need it.. Thx

 

How much do you want for them Mark?

 

new parts made not oem. i am going to look for the jet-pump sunday when i am up at the garage.

 

Thanks Mark. Can you please email me the source for these flanges? Might go that route.

 

Damn Hound thats nasty!

how much power are you making again?

I wonder if the temperature extremes you guys experience up there has something to do with the failure