2010 Corvette Challenge - get prepped - Stock C6 Z06 Special
01-02-2010, 05:06 PM
#1
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2010 Corvette Challenge - get prepped - Stock C6 Z06 Special
Take a look at this poor block.
A stock valve broke off and the results below are not pretty. Its also not an isolated case nor is this the first engine build weve received due to this failure.
Drop off your stock Z for a reliability upgrade and avoid this from happening to you. Our CC special includes:
R&R Heads
One-Piece Stainless Steel Exhaust Valves
Serdi, Multi-angle Competition Valve Job
Dual Valve Springs & Titanium Retainers
All gaskets and fluids
$1895
Options include: (may alter the class you run - check rules)
AiRaid competition Intake System
Complete Dyno tuning
Ported Intake Manifold
Ported TB
CHE Rocker Arms
One-piece, moly pushrods
All modifications are proven winners and track tested.
Look below......Don't let this happen...it will definitely ruin your day and dent your bank account!
A stock valve broke off and the results below are not pretty. Its also not an isolated case nor is this the first engine build weve received due to this failure.
Drop off your stock Z for a reliability upgrade and avoid this from happening to you. Our CC special includes:
R&R Heads
One-Piece Stainless Steel Exhaust Valves
Serdi, Multi-angle Competition Valve Job
Dual Valve Springs & Titanium Retainers
All gaskets and fluids
$1895
Options include: (may alter the class you run - check rules)
AiRaid competition Intake System
Complete Dyno tuning
Ported Intake Manifold
Ported TB
CHE Rocker Arms
One-piece, moly pushrods
All modifications are proven winners and track tested.
Look below......Don't let this happen...it will definitely ruin your day and dent your bank account!
I'm going to have nightmares 
01-02-2010, 07:36 PM
#4
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That's an LS7?
LS3 has a serious oiling problem that has caused motors to blow up from oil starvation, especially in turns with elevation changes. Adding Z06 dry sump oiling system solves the problem.
What caused that?
LS3 has a serious oiling problem that has caused motors to blow up from oil starvation, especially in turns with elevation changes. Adding Z06 dry sump oiling system solves the problem.
What caused that?
01-02-2010, 07:46 PM
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St. Jude Donor '09
San
01-02-2010, 08:19 PM
#6
Burning Brakes
Adding an ARE dry sump oiling system solves the problem.
01-02-2010, 09:41 PM
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I can remember having a conversation with Charlie regarding the valves and the failures he was seeing shortly after getting my Z. I wish I would have listened more carefully 
01-02-2010, 10:35 PM
#9
Former Vendor
Thread Starter
Of course, you can always use the traditional belt drive system to drive all the pumps - scavenge and pressure stages.
Exhaust valve dropped the head off.
01-02-2010, 10:36 PM
#10
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01-02-2010, 10:38 PM
#11
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yep
01-03-2010, 12:24 PM
#15
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I cant determine the actual cause of the failure. The piston is completely disintegrated and the cylinder head is not in much better shape.
In general, Ive listed some typical failure modes but I will more keenly research sodium filled failure modes and list that data at a later time.
1) Fatigue Failure - Eccentrically seating valves create large side loads which flex & stress the valve head
2) Pounding poor valve control or in the case of solid rollers excessive lash
3) Stretching - excessive heat and excessive RPM
4) Thermal Shock sudden temperature changes when shutting off a highly loaded engine
In general, Ive listed some typical failure modes but I will more keenly research sodium filled failure modes and list that data at a later time.
1) Fatigue Failure - Eccentrically seating valves create large side loads which flex & stress the valve head
2) Pounding poor valve control or in the case of solid rollers excessive lash
3) Stretching - excessive heat and excessive RPM
4) Thermal Shock sudden temperature changes when shutting off a highly loaded engine
01-03-2010, 12:58 PM
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I can’t determine the actual cause of the failure. The piston is completely disintegrated and the cylinder head is not in much better shape.
In general, I’ve listed some typical failure modes but I will more keenly research sodium filled failure modes and list that data at a later time.
1) Fatigue Failure - Eccentrically seating valves create large side loads which flex & stress the valve head
2) Pounding – poor valve control or in the case of solid rollers excessive lash
3) Stretching - excessive heat and excessive RPM
4) Thermal Shock – sudden temperature changes when shutting off a highly loaded engine
In general, I’ve listed some typical failure modes but I will more keenly research sodium filled failure modes and list that data at a later time.
1) Fatigue Failure - Eccentrically seating valves create large side loads which flex & stress the valve head
2) Pounding – poor valve control or in the case of solid rollers excessive lash
3) Stretching - excessive heat and excessive RPM
4) Thermal Shock – sudden temperature changes when shutting off a highly loaded engine
Also, wouldn't the rev limiter prevent excessive RPM or are you talking about excessive RPM in a particular gear before the limiter?
The car has 80K and at least 20 track days, not that that should matter I guess. Recently I saw a motor blow at WSIR and the car had 20K on it...go figure.
Finally, the track was wet and I've never driven on a wet track so I was taking it easy on the first lap and it let go in mid corner after braking.
I'm more concerned with it being something I did, a good thing to know.
Last edited by stano; 01-03-2010 at 01:03 PM.
01-03-2010, 01:38 PM
#17
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One thing I started doing was letting my motor run after a session instead of turning it off right away. I never used to do that.
Also, wouldn't the rev limiter prevent excessive RPM or are you talking about excessive RPM in a particular gear before the limiter?
The car has 80K and at least 20 track days, not that that should matter I guess. Recently I saw a motor blow at WSIR and the car had 20K on it...go figure.
Finally, the track was wet and I've never driven on a wet track so I was taking it easy on the first lap and it let go in mid corner after braking.
I'm more concerned with it being something I did, a good thing to know.
Also, wouldn't the rev limiter prevent excessive RPM or are you talking about excessive RPM in a particular gear before the limiter?
The car has 80K and at least 20 track days, not that that should matter I guess. Recently I saw a motor blow at WSIR and the car had 20K on it...go figure.
Finally, the track was wet and I've never driven on a wet track so I was taking it easy on the first lap and it let go in mid corner after braking.
I'm more concerned with it being something I did, a good thing to know.
Nothing you could have done...another point to consider is that the sodium valves are hollow (in order to carry the sodium) and though well engineered, the cross sectional area is reduced.
In doing a little Google work and it appears that the sodium valves are a common failure point in some Ferrari's as well.
Charlie
01-03-2010, 02:21 PM
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Stan,
Nothing you could have done...another point to consider is that the sodium valves are hollow (in order to carry the sodium) and though well engineered, the cross sectional area is reduced.
In doing a little Google work and it appears that the sodium valves are a common failure point in some Ferrari's as well.
Charlie
Nothing you could have done...another point to consider is that the sodium valves are hollow (in order to carry the sodium) and though well engineered, the cross sectional area is reduced.
In doing a little Google work and it appears that the sodium valves are a common failure point in some Ferrari's as well.
Charlie
I'm looking forward to the new RPM motor
Stan
01-03-2010, 02:32 PM
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Hard to believe that a modern LS7 would crater like that, but I guess it did. Sorry about that, Stano.
Remember that the rev limiter only prevents overrevs on shifting up. On a downshift, you can still overrev the motor and the rev limiter won't help you.
Remember that the rev limiter only prevents overrevs on shifting up. On a downshift, you can still overrev the motor and the rev limiter won't help you.