C4 wreck @ Mid-Ohio [Forums - Road Racing and Autocrossing]

Road Racing and Autocrossing > C4 wreck @ Mid-Ohio
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BrianCunningham	C4 wreck @ Mid-Ohio	#1
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	master cylinder failure http://forums.corvetteforum.com/autoc ... d-at-mid-ohio-photos.html Quote: mrc24x; Here are some pics of the sadly departed #777 PTA C4 racecar.:blueangel: (posted at the request of the owner/driver) **BTW Greg, I'm not sure how far along you are with the new build but there's another C4 relisted on Ebay for ~10K. It might be worth checking out.
	Posted on: 2009/7/17 15:14
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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1Fast04Vert	Re: C4 wreck @ Mid-Ohio	#2
Elite Guru The hills of N. Georgia 2424 Posts Member since: 2007/12/30 0:00	Looks like it needs more than some Zaino. It also looks like the cockpit is still all intact, hope the driver is OK. Did they really have to park it by the porta-poties? That is adding insult to injury.
	Posted on: 2009/7/17 15:49
	_________________ 2004 Vert. 475hp. Built by Vengeance Racing
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pianoguy	Re: C4 wreck @ Mid-Ohio	#3
Guru Emeritus Apple Valley, MN 14762 Posts Member since: 2007/12/29 0:00	Quote: 95vette wrote: Looks like it needs more than some Zaino. It also looks like the cockpit is still all intact, hope the driver is OK. Did they really have to park it by the porta-poties? That is adding insult to injury. Amen! That is a shame
	Posted on: 2009/7/17 16:04
	_________________ 1996 LT4 �Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.�- Jack Handey
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BillH	Re: C4 wreck @ Mid-Ohio	#4
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	If the guy was running a stock master cylinder, shame on him.
	Posted on: 2009/7/17 17:52
	_________________ Every man dies but not every man lives.
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BrianCunningham	Re: C4 wreck @ Mid-Ohio	#5
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	Quote: BillH wrote: If the guy was running a stock master cylinder, shame on him. Why so?
	Posted on: 2009/7/17 18:11
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Matt26R	Re: C4 wreck @ Mid-Ohio	#6
Guru Powell, Ohio 76 Posts Member since: 2008/1/14 0:00	Quote: BillH wrote: If the guy was running a stock master cylinder, shame on him. What do you recommend?? I'm still running the stock twin reservoir unit. I am rebuilding it before the next event though.
	Posted on: 2009/7/17 19:19
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Matatk	Re: C4 wreck @ Mid-Ohio	#7
Webmaster SW Chicago Burbs 22802 Posts Member since: 2008/1/7 0:00	Quote: BillH wrote: If the guy was running a stock master cylinder, shame on him. Is there a better aftermarket to run? I'm sure the cage saved that guy's life, huh? Matthew
	Posted on: 2009/7/17 20:02
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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BillH	Re: C4 wreck @ Mid-Ohio	#8
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	Matt & Brian, IMO, the only thing to run is dual m/cs, Why so? If one fails, you still have brakes on one end. The added advantage is brake bias adjustment. The propotional addon valves work but, not that well and you are still depending on one m/c. With duals, you can "bench setup" the system in the shop and dial it in on a test day. Both Tilton & Wildwood make fairly good equipment.
	Posted on: 2009/7/18 1:26
	_________________ Every man dies but not every man lives.
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BillH	Re: C4 wreck @ Mid-Ohio	#9
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	Quote: Matatk wrote: I'm sure the cage saved that guy's life, huh? Matthew Yea, Matt that's a good point. And this goes back to the other post on the GTR. My statement on the cage has nothing to do with lap times, it's all about safety.
	Posted on: 2009/7/18 1:28
	_________________ Every man dies but not every man lives.
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Jeffvette	Re: C4 wreck @ Mid-Ohio	#10
Elite Guru Not on CF 1297 Posts Member since: 2007/12/29 0:00	Quote: BillH wrote: Matt & Brian, IMO, the only thing to run is dual m/cs, Why so? If one fails, you still have brakes on one end. The added advantage is brake bias adjustment. The propotional addon valves work but, not that well and you are still depending on one m/c. With duals, you can "bench setup" the system in the shop and dial it in on a test day. Both Tilton & Wildwood make fairly good equipment. Come on Bill. There are people that don't know what a harmonic balancer is and you expect them to handle dual masters with a balance bar.
	Posted on: 2009/7/18 2:24

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TommyT-Bone	Re: C4 wreck @ Mid-Ohio	#11
Chair-man of the bored Homestead USA 33754 Posts Member since: 2007/12/10 0:00	That car might still have some life left in it.
	Posted on: 2009/7/18 11:27

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ghoffman	Re: C4 wreck @ Mid-Ohio	#12
Senior Guru 258 Posts Member since: 2008/1/25 0:00	Besides the fact that god obviously did not want to recall this gentleman yet, I think the real point is not just the single versus dual issue since in reality the Corvette is a dual, just inline. The point is he had not rebuilt the one he had and it failed from neglect. There was a moron on CF that was plugging Brembo to the point that he said Brembo's are so good they never need rebuilds! BTW, now you guys know why I have the big AP calipers. I routinely go at least 20-30 MPH faster than this gentleman was going, lap after lap (ask Brian). It basically is a street legal GT-1 car, lap time wise. Guess what? I will periodically rebuild the AP's too. I flush the brake and clutch fluids about 4x per year.
	Posted on: 2009/7/18 12:19

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BillH	Re: C4 wreck @ Mid-Ohio	#13
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	Luck results from good preperation. So do race victories and sometimes survival. The lucky guys who don't prep are usually waiting on the tow truck in the middle of a race. They guys who prep for a race figure it's 6 to 1, 6 hours prep per hour of track time. Just the nut & bolt check before every race can take 45 min. to 2 hours. I also flush the brake system 3-4 times a season and calipers every race.
	Posted on: 2009/7/18 13:34
	_________________ Every man dies but not every man lives.
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Aardwolf	Re: C4 wreck @ Mid-Ohio	#14
Senior Guru Fremont, WI 209 Posts Member since: 2008/4/30 15:21	Quote: Matt26R wrote: Quote: BillH wrote: If the guy was running a stock master cylinder, shame on him. What do you recommend?? I'm still running the stock twin reservoir unit. I am rebuilding it before the next event though. Could you please make a post about the rebuild? I should do that as well.
	Posted on: 2009/7/18 21:29

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BrianCunningham	Re: C4 wreck @ Mid-Ohio	#15
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	Looks like he agrees with you guys [QUOTE]jan800vette; I will share Randy"s (DRM) thoughts on how it might have been prevented. The black residue in the bottom of the brake fluid reservoir is seal material from wear. Mine (stock master set up) had about the same look as a 50,000 mi car. Worn or old seals can lead to failure without warning. ...Regardless, my next car will have dual remotes. If your going to run a single master, take the time to replace the seals annually. [/QUOTE] That's good to know, I've got 150k on my original master cylinder! A lot of good dual circuits & reservoirs do if they're connected when a seal fails!
	Posted on: 2009/7/19 17:23
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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SpectatorRacing	Re: C4 wreck @ Mid-Ohio	#16
Elite Guru 1721 Posts Member since: 2007/12/29 0:00	Quote: BillH wrote:They guys who prep for a race figure it's 6 to 1, 6 hours prep per hour of track time. Just the nut & bolt check before every race can take 45 min. to 2 hours. For a C4 it's more like 6 days of prep (and repair) time per hour of track time...
	Posted on: 2009/7/20 18:37
	_________________ aka Scaryfast
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NC Kid	Re: C4 wreck @ Mid-Ohio	#17
Elite Guru North Carolina 1671 Posts Member since: 2006/11/27 0:00	I have a master cylinder that is only one resovoir unfortanutly but it is not quite a year old....I am converting to Stainless Steel breakelines next week along with flushing the entire system again, and all new 4 pads and rotors(slotted only) to keep the brakes in good condition. Also replaced the brake booster about 1.5 years ago. I learned that Lock tite is a MUST. I always lock tite all the caliper bolts when they are removed and check them annually. 2 caliper bolts have wiggled free and my caliper fell off damaging my rims...
	Posted on: 2009/9/16 18:25

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BillH	Re: C4 wreck @ Mid-Ohio	#18
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	We use almost zero locktite on the racecars, prefer a torquewrench. If you use blue locktite on a caliper and use the brakes hard, you're kind of defeating the prpose of the locktite since it breaks down at 300 degrees.
	Posted on: 2009/9/16 21:07
	_________________ Every man dies but not every man lives.
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Jeffvette	Re: C4 wreck @ Mid-Ohio	#19
Elite Guru Not on CF 1297 Posts Member since: 2007/12/29 0:00	Quote: BillH wrote: We use almost zero locktite on the racecars, prefer a torquewrench. If you use blue locktite on a caliper and use the brakes hard, you're kind of defeating the prpose of the locktite since it breaks down at 300 degrees. Along with safety wire when you damn sure don't want that bolt baking out!
	Posted on: 2009/9/16 22:28

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BillH	Re: C4 wreck @ Mid-Ohio	#20
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	Quote: Jeffvette wrote: Quote: BillH wrote: We use almost zero locktite on the racecars, prefer a torquewrench. If you use blue locktite on a caliper and use the brakes hard, you're kind of defeating the prpose of the locktite since it breaks down at 300 degrees. Along with safety wire when you damn sure don't want that bolt baking out! Yep, and it's nice to have the nut & bolt jigs to do it.
	Posted on: 2009/9/16 23:00
	_________________ Every man dies but not every man lives.
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