Road America PCA: Video Thread
09-09-2013, 09:02 PM
#47
Nordschleife Master
In keeping with the topic at hand, I have the whole thing on video, and would be happy to share it with you guys, but am just not sure about putting it up on Youtube?
09-09-2013, 09:16 PM
#49
Nordschleife Master
But on the other hand, lapping is getting a bit old, as is waiting for point-byes, and I have some friends racing their cups and egging me on... so I'm there. A cup would be nice, but my car is just the way I want it, just not a factory race car. Decisions, decisions.
That's why I'm not rushing the repair, I will take time to think about it, hoping that I will have an a-ha moment along the way.
This car race-prepped would be a GT2 (gearbox), which seems to be an arms race, so no podium for me, but hey, that's not why we do it now, is it
09-09-2013, 10:20 PM
#50
Rennlist Member
I believe the rear 1/2 shaft can be removed without disturbing the rear hub and brakes and that is why you didn't loose the rear wheel. Damn that wasn't long for replacement 1/2 shaft. I wonder if it was over torqued when it was installed.
Peter
Peter
09-09-2013, 10:34 PM
#51
Nordschleife Master
I believe that torque is something like 400 ft-lbs, so I could see someone leaning heavily on the nut with an impact gun. Otherwise, I can't see how the shaft could have broken inside the hub the way it has.
Then again, wheel studs also break for no obvious reason.
Then again, wheel studs also break for no obvious reason.
09-09-2013, 11:13 PM
#52
Rennlist Hoonigan
which cost no drachmas
Lifetime Rennlist
Member
Rennlist
Site Sponsor
which cost no drachmas
Lifetime Rennlist
Member
Rennlist
Site Sponsor
Post up a picture of the ends of the shaft were it broke. It's not uncommon for splined shafts to break like that.
09-09-2013, 11:57 PM
#53
Rennlist Member
OT... but GT-2 is not an arms race... it's barely a race. I can't remember the last time I even saw a GT-2 car (a famous GT-2 car blew up at Putnam last year). I'm pretty sure you would be on the podium (by yourself) at every race.
09-10-2013, 12:28 AM
#54
Rennlist Member
^ That seems to have been a common theme; must be the second tier, concrete curbing at RA...
I broke the rear left axle nut => caused the ABS to malfunction => caused left front lock up at T1 and flat spot through steel belt => caused loss of steering (made worse by the fact that I didn't realize what was going on) => went straight off through kitty litter, which BTW doesn't slow you down near as much as you would think => ended up in tire wall, and experienced first hand the very effective track crew ==> which is now causing me to ponder whether or not I should convert Jelli Bn to a full race car
I broke the rear left axle nut => caused the ABS to malfunction => caused left front lock up at T1 and flat spot through steel belt => caused loss of steering (made worse by the fact that I didn't realize what was going on) => went straight off through kitty litter, which BTW doesn't slow you down near as much as you would think => ended up in tire wall, and experienced first hand the very effective track crew ==> which is now causing me to ponder whether or not I should convert Jelli Bn to a full race car
09-10-2013, 12:31 AM
#55
Nordschleife Master
Sorry about the hijack.
09-10-2013, 11:22 AM
#56
Nordschleife Master
Just to bring it back on video topic, here is the vid. Password: rennlist
https://vimeo.com/74200859
BTW, I wasn't spaced out at the end, just obeying instructions to stay belted until workers arrive. Thank God for HANS.
The explanation about the axle break causing this is of course speculation, but something external caused the lock up, because other factors are identical to previous laps (speeds, brake point, etc.).
https://vimeo.com/74200859
BTW, I wasn't spaced out at the end, just obeying instructions to stay belted until workers arrive. Thank God for HANS.
The explanation about the axle break causing this is of course speculation, but something external caused the lock up, because other factors are identical to previous laps (speeds, brake point, etc.).
09-10-2013, 11:43 AM
#57
Burning Brakes
oh man thats freaking scary place to have that happen, amazing how early you see your steering wheel telling you something is wrong.
for the future, id be VERY careful turning the car prior to going into a gravel trap (road atlanta rolex race comes to mind).....most cars are alot safer if you go straight into a sandtrap or a wall....
also the hands off the steering wheel. easy to talk about but the hardest thing to do when the time comes.
Really glad your ok and the car is relatively unharmed, id still have that tub looked at by someone, would not be suprised if there is some movement up front.
you should post this in the airbag thread.
this is another reason to unplug your airbags if you have a harness etc...would saved you alot of money right there.
for the future, id be VERY careful turning the car prior to going into a gravel trap (road atlanta rolex race comes to mind).....most cars are alot safer if you go straight into a sandtrap or a wall....
also the hands off the steering wheel. easy to talk about but the hardest thing to do when the time comes.
Really glad your ok and the car is relatively unharmed, id still have that tub looked at by someone, would not be suprised if there is some movement up front.
you should post this in the airbag thread.
this is another reason to unplug your airbags if you have a harness etc...would saved you alot of money right there.
09-10-2013, 12:48 PM
#58
Rennlist Member
Sorry about the incident...tough deal.
ABS malfunctions because the toothed ring it uses for wheel speed is on the axle shaft. Once the axle breaks the ABS can't read that wheel's speed.
Brakes also don't function normally because the rotor is wobbling around and causes a soft pedal.
If you plan on turning your car into a club racer.... if the only major mods are gearbox and wing, sell them and return to stock.
Run the car in J stock with the other GT3's.
J's a good class, I think there were six cars at Road America.
ABS malfunctions because the toothed ring it uses for wheel speed is on the axle shaft. Once the axle breaks the ABS can't read that wheel's speed.
Brakes also don't function normally because the rotor is wobbling around and causes a soft pedal.
If you plan on turning your car into a club racer.... if the only major mods are gearbox and wing, sell them and return to stock.
Run the car in J stock with the other GT3's.
J's a good class, I think there were six cars at Road America.
09-10-2013, 12:50 PM
#59
Rennlist Member
Besides airbag you also blow the seat belt actuator for $$ I know this from personal experience. The big thing is you are OK 
and it looked like you were doing around 40mph when you hit. Car didn't slow much once you hit the gravel but you kept it straight and didn't roll.
Peter
and it looked like you were doing around 40mph when you hit. Car didn't slow much once you hit the gravel but you kept it straight and didn't roll. Peter
