I went to a open track event this past weekend and watched as 2 new Z06s blew there engines, that makes 5 in the past 3 events. The timing chain is too pedestrian. It lets go, internals get smashed. Poor design! Dealers don’t cover it, since the car was revved hard repeatedly before it lets go.

Cheap chevy crap!

Are these motors stock? I don't understand how that could happen and not to the people who put 150+ shots of nitrous, cams, headers, and cat backs on the Z's and race them without a problem. If anything just the cam and exhaust would make that chain break on the dyno now add nitrous and it would definably break the engine on the dyno. I have yet to see that happen . If the chain is so bad why dosen't Procharger add a new timing chain to their supercharger kit? a Centrifical supercharger would without a doubt break that timing chain if the timing chain is weak stock.

Yes they were stock. I’m not talking a few seconds burst of speed in a straight line here. I’m talking about 20min of non stop breaking and acceleration.

Wow, first design?! maybe.... That just goes to show you that you need to put tons of power into the Z to make it run correctly. The stock parts on a stock car get board and leave.

racing is so hard on a car, you can ruin a car that runs like a top in a matter of minutes or hours if you're careful

Yea but at 4 or 5 20min sessions a day by a novice in a totally stock car shows that its more a problem on the manufacturers part not the stress inflicted by the car owner.

true, but few production cars would last a track day

lol, don't act like the Z06 crushes every American car made.

who, me?

true, but few production cars would last a track day
Not true not true at all. I have seen anything from a bone stock 05 V6 Mustang to my own personal E36 M3 last without major issues.

:fingersx: let me drive them

HEY COBRA. what do you know about fords? i know they are not the best on the road. dont get me started. i will pee on a mustang unless it is a mach 1.

my dad works for gm and was doing test on the z's and they were doing 0-100 -0-100 as quicly as the car could do it for about and hour and not a thing happened except that they locked up the rear break melted it i should say.

HEY COBRA. what do you know about fords? i know they are not the best on the road. dont get me started. i will pee on a mustang unless it is a mach 1.
I know how to make them handle adequately on track. The thing is you always end up spending more just to keep up with a car that is for the most part stock. Every car has its problems even GMs rattle trap.


There isn’t anything really special about the Mach1, just like the WS6 and Z06 the “ram air� is just for show.

my dad works for gm and was doing test on the z's and they were doing 0-100 -0-100 as quicly as the car could do it for about and hour and not a thing happened except that they locked up the rear break melted it i should say.
That's not the same thing. On track your always alternating your speeds. A 0-100mph test in no way simulates what a car goes though on track.

There could be alot of things going on. Some of those guys have tuned their cars and there is a good chance they tuned them wrong. I have seen MANY Z06s go down the track without a problem. One fellow in partcular is pulling 10s in the quarter with only DRs and no other mods.

I am not sure if he was talking about road racing or drag racing.

I haven't heard of any issues with the stock engine letting loose, this is news to me.

actually, I will say that I have heard of three different TBSSs blowing up. That is supposed to be GM's "bullet proof" engine.

Not really sure what happened to them. I am guessing my tranny will break before the engine will though. Tranny in these things are garbage.

Were they bone stock?

Yup, they were bone stock. Two of them were brand new members of the forum who came to ask if anyone had problems with theirs'. All three said they were stock and one even said that when they scanned the ECM to find out what happened, it was only at 2,800 RPMs when it blew. He said the exhaust sounded funny when he started it up, but continued driving it. He heard something weird, lost all oil pressure and the engine blew. We asked him when he lost oil pressure and he said it was the same exact time the engine blew, so it's difficult to speculate if it was, in fact, due to a loss of oil pressure. One possibility is that the engine blew first, THEN lost oil pressure, or that it lost oil pressure, then blew. The ECM's scan was inconclusive too.

I am not sure if he was talking about road racing or drag racing.

I haven't heard of any issues with the stock engine letting loose, this is news to me.
Open track and the engines were stock according to the owners