Originally Posted by Whizkid

If you want to prevent these engine failures in an LS7 you have to address the only fault the engine has--it is not a true dry sump. Until you install the complete dry sump system from Aviaid or anyone else that makes a true one, you are going to have oil piling up in that crankcase increasing the pressure the engine is working against and starving the bearings. That engine is at its limit and any mods to that motor will detract from the reliability if you go road racing with it. Why do you think LG runs a stock LS7 @7000 RPM and gets away with it--because he can!

Originally Posted by Muir

Not a true dry sump, or not designed to adequately deal with these operating conditions? Wondering what about the design makes it not a "true" dry design.

Originally Posted by wstaab

This thread started talking about oil starvation that is the kiss of death for any engine that uses pressure lubrication. The C6 Z06 does not have a true dry sump oiling system as used on many purpose built race cars. The pan is too deep, there is only one pick up, and there is only one scavenge stage. True dry sump systems have shallow pans, multiple pickups with baffling around them and multiple scavenge pumps pulling oil from different points in the pan. The stock system was designed to handle the forces generated by OEM tires, stock suspension and brakes, and stock power levels. When you upgrade the C6 Z06 brakes, suspension, engine power, and tires to slicks or DOT race tires the forces the car can generate are much higher than stock which directly affects the oiling system. A Z06 with upgraded brakes and true competition tires can generate higher forces braking than cornering, which forces oil to the front of the pan away from the pickup. Sometimes high g braking can last longer than high g cornering. Take for instance Road Atlanta turn 10. Downhill from very high speed and long in duration. I have logged low oil pressure braking for turn 10 with the stock oiling system
Modified cars also generate more acceleration forces which force the oil to the rear of the pan. Take for instance Road Atlanta turn 1. High lateral g, full throttle uphill. So is 8 quarts in the stock C6 Z06 oiling system with one pickup and no baffling adequate for a highly modified Z06 that is used for track days on full on race tracks? I doubt it.
If you want a full on track car, oiling system improvements need to be part of the upgrades just like suspension, tires, motor, clutch, etc.
GM decided to add an extra 3+ quarts to the 09 Z06 and the ZR1 oiling system for a reason. This was a cheap solution to avoid substantial engineering costs and retooling cost. Does it help. Time will tell. How many 2009 Z06's and ZR1 have had motor failures during track days?
If you cannot get the oil back to the tank through the scavenge system, the pressure pump cannot do its job to pressure lubricate the engine. It only takes a few seconds with no oil pressure at any rpm over idle to damage engine bearings.

Originally Posted by Randy@DRM

I get asked everyonce and awhile. What is the most reliable Corvette for road racing. My answer is very said but pretty true. It's a 1989 Corvette. Why not the FRC or Z06 C6 or C5? Well the 1984-88 cars were tested, and raced then in 1989 Gm took everything they learned at the track and made a production car. The stock car you can take to the track and pound the crap out of it. It wasn't fast, it's not sexy for the now times, they didn't pull high Gs, and didn't have alot of bling, but can be trashed without too many problems.

Why this sucks, well the C5's and C6's are much faster out of the box. Better chassis, LS engines, a healthy aftermarket, and etc. But all of the C5's and C6s need a lot of work before you can pound the crap out of them. With aftermarket parts and a good install you can make them pretty bullet proff.

C6 Z06 has a wet-dry system and shouldn't ever be confused with a Dry-sump. It would be a marketing nightmare to name it a, wet sump with a couple extra quarts in this tank that mounts in the engine bay, the oil gets returned to the tank with a small hose and a internal single stage pump.

Wet sumps, dry sumps and a comb of the two, can work at the track with very stick tires. But not without some tricks, and or hard aftermarket parts.

Randy

Originally Posted by '06 Quicksilver Z06

There is excellent information all over the forum about this:

Read the posts by ronsc and Painrace.

http://forums.corvetteforum.com/c6-z...post1570969318

http://forums.corvetteforum.com/c6-z...post1571057069





The "dry sump" system in the C6 Z06, like anything else, is only as good as it's intended application. It was never intended for/built for use with sticky tires, suspension modifications or aftermarket brake kits. Had that been the case, then a true dry sump system would have been used.

Originally Posted by jimman

you want to stire up Captain Marvel again

Originally Posted by '06 Quicksilver Z06

There is excellent information all over the forum about this:

Read the posts by ronsc and Painrace.

<snip>

Originally Posted by Vetter Atl

Of course you would....douche....

Originally Posted by kelp

Looks the same as my single cylinder no 5. I was topping 3rd, cracked the sleeve, the piston lodged and the exhaust valve went through it. I was at 580 RWHP with the stock bottom end and block... good call on the sump, it's what I'm doing.

Originally Posted by evo8 MR

........................................ .....
I don't hear much from viper engines blowing up.

Originally Posted by evo8 MR

I would had suit GM for what you went through. What a shame. I was sold when I got my Z06 and now I regret of buying it. It looks good and all that but the engine is having a high unreliable failure rate that I just can't justify.

I don't hear much from viper engines blowing up.

Originally Posted by klasik-69

Do you think it may have to do that you're on a Corvette Forum ????

Originally Posted by NytmereZ

actually no it doesnt, I'm an owner of both and am on Viper forums as well, the engines are very stout. I have blown 2 LS motors myself. The only LS motor that GM did right is the LS9(all forged), I dont understand why GM would put cast crap in their performance motors(well I do its called cost)

Originally Posted by Joe_Planet

Dude you should send the viper to hennessey

Originally Posted by Joe_Planet

Dude you should send the viper to hennessey

Originally Posted by NytmereZ

I dont understand why GM would put cast crap in their performance motors(well I do its called cost)