tim414

It probably would not live to see that number since it was a 400 horse engine to begin with.

I for one am glad the Op is not banging his motor here.

I just wish that either GM or reputable shop would come out and say "24 hours of track time-refresh motor".

Didnt Jason (Katech) say that Vette racers are refreshed after 24 hours of LeMans....anyway....IMO it served OP well. Just seems to me it would be less costly to refresh after certain amount of hours rather than allowing the block to be wiped put when ot does go.

95jersey

I disagree, it is all relative. The OEM LS6 probably put down 340rwhp, so that is big jump to 425rwhp. Also, that was a 5.7 liter with a wet sump. The gains per their respective motors are almost on par and a 7 liter motor should be able to handle the power better than a 5.7 liter. To get 581rwhp out of a LS6 would be a VERY radical motor, not so for the LS7, so your comparison is apples to oranges.

I still think after all these years it seems the LS6 (even modded) has proven to be the most reliable LSX Corvette motor.

Bill Dearborn

Since Aug of 09 I have put 37 track days and 20 some autocrosses on my 08Z. I average ~ 100 miles per track day so that is well over 3K miles of hard high revving driving. Right now it has 23K miles on it.

Bill

Pontiaker

I agree jersey, 100% The LS6 is a great engine its my opinion that the LS2 is probably next in line.

My Z gets about 20 track days a year, 34k miles and still going strong. BUT Iam not going to just keep driving mine and hope it does not blow, I am at least going to pull the heads, replace the valves and a CNC port while they are off. My car already has a cam and double springs. When one of the springs broke on the freeway, the other kept it from dropping the valve. Would like to add the bigger sump and a couple other small things to help the engine last as long as possible.

VNAMVET

..................what a loss..............of money........

AirBusPilot

Except it's the same basic engine, same block dimensions. But making alot more power.

Everett Ogilvie

I think this is the right question. Race car engines are replaced or gone through at some periodic frequency which is based on the use and budget. Track day guys like us want to race our cars, but have it last as long as a street only car does. I am starting to think about my engine, and how I use it and what might be appropriate for it.

And to the OP - sorry about your engine, but it does indeed sound like it served you well, and your next one will be even better.

Wulverine

They very well might have used OEM exhaust valves.

FrankTank

OP good luck on the rebuild and keep us posted on the progress. Sorry she let go, but looks like she held up well all things considered.

0Louis @ LG Motorsports

This is exactly true.



Bingo. Preventative maintenance should be shuffled over to street/track cars just like race cars. We time parts out on race cars, and do oil analysis', check filters, check and change plugs, change oil after every track day, visually inspect everything.

We have had this discussion before, and I think it needs to be had again. This stuff doesnt last for ever and these engines need refreshing just like any race engine.

Just FWIW, the ALMS GT2 car makes 490 rwhp. Thats very simlilar power to a bolt on Z, and it comes apart every 12 hours for sprint races, and 24 hours for the long races. If we dont rebuild it, we break parts and the cost is 2/3/4/5x as much.

Louis

mirage2991

but you see Louis, there a few people on these car boards that believe they should last for ever and get oh so pissed off when they don't... (doesn't apply to OP obviously). Then we get a bunch of threads about GM this and that and LS7 this and that...it's just a shame.

'06 Quicksilver Z06

They don't say whether or not they do or don't.

http://www.mtiracing.com/C6-Z06-Engine-Upgrades.html

VRedZ06

C6-Z06 Corvette

Stage II “extreme upgrade

581 RWHP 521 RW torque

7.0L (427 cu.in.) engine package

Includes:

MTI RACING Stainless Steel Long Tube Headers

.065” wall lubing / LS7 / D-port primary tubes / 3” collector.

Random Technologies High-Flow Cats 3” & X-pipes

Callaway "Honker" Cold Air Induction

MTI RACING Ported / Polished 90mm Throttle Body

MTI RACING LS7 Cylinder Heads, High-flow CNC Ported,

hand finished w/ Serdi multi-angle valve job and finishing.

MTI RACING Intake Manifold Ported and port matched

MTI RACING Custom Cam Profile

CNC Valve Spring Retainers,

Nextech Alloy Valve Springs With Hardened Locks

MTI RACING Super Alloy Hardened Spring Seats

Manley 434Chrome Moly Push rods

160 / 180 Thermostat

MTI RACING "Hot Spark" Plug Wires

MTI Racing custom computer programming and dyno tuning

MTI Quick shifter

MTI Aero Package front Splitter and CF Rear Spoiler

HardbarUSA Penske 8760 Coil Over suspension package

Brey Krause Harness bar

John Caravaggio Touring/Track Seats

Breathless Performance Rear Diffuser and exhaust

CCW TE14 18X10 Front 18X13 Rear and Goodyear slicks

__________________
Ernie O Team Play Hard
"Live life, have fun, bring people along for the ride"

VRedZ06 View Public Profile Send a private message to VRedZ06 Send email to VRedZ06 Find More Posts by VRedZ06 Add VRedZ06 to Your Contacts
05-02-2010, 10:19 PM #14 VRedZ06
CF Senior Member

St. Jude Donor '10

2006 Chevrolet Corvette




My Corvette Photos
Member Since: Mar 2008
Location: Manahawkin NJ


MTI Racing Stage II Extremem package. Doen 2 yesrs ago and 21K miles on it go issues

VRedZ06

Thanks Paul, will really get a serious look at the ERL and thew RHL. I just wanted to see if the nold stell blocks had more staying power.

But my baby did me well, I enjoyed every second I was driving here and every second modifying her.

Will post info as it come available.

Thanks to all the members with good wishes

VRedZ06

Thanks for the great words from everyone. The yearly or bi yearly pull the covers check the heads and general maintenance is something I will consider in the future. As with most of ud we are trying to do all we can do as much as we can do it and track weekend verses open up the engine after every 12 track days is a question I would answer like this, hey Lime Rock again or bring it to Joe's shop for a check up?? Line Rock!!!~!!!

Hey I pushed her hard on the track and I have had a lot of FUN, b een on the cover of Corvette Enthusiast and made countless new friends !!! and that's why I purchased her and had the mods done. I expect a reasonable cost to bring her back to life. Wish I was more capable mechanic but I have her in good hands so reports will come in and out as I get them.

Thank you all for your encouragement.

ErnieO[/quote]

Landru

Just posted: http://forums.corvetteforum.com/c6-z...nd-07-z06.html

Otherwise a moment of silence for this Z06 and the 46,000 miles of reliable service, and fun, it delivered.

Fartpipe

Really sorry to hear of the failure Ernie. I'm sure its upsetting either way.

Curious of the following:
Which valves were in the heads
Were the springs ever rechecked
What condition are the roller rockers in
Was the tune ever rechecked


Thanks and heres to a speedy recovery

68-427Rich

These "LS" series, computerized engines are proving to be more failure prone every day.

VRedZ06

they already sold the engine. They move fast when the price inright.
Thanks for looking and sending me the email.
ErnieO

VRedZ06

There's build sheet on the post further up. Also the car was just down at MTI for 2 months doing some new oil, dif and trans cooling rads, roll bar attached to the aluminum frame with Stainless sleeves and I had asked them to check the engine while it was there. So I hope they did do it. The destruction happened so fast at such a low rev and sounded that I was just surprised. I though I had a exhaust gasket go on me since the original noise sounded just like a blown exhaust gasket does.

I will get as much info on the forum as I can.

Thanks to all my Z06 Brothers out the for the encouraging words.
ErnieO