[Z06] c5z or keep my c6z?
Instructor
Joined: Jul 2011
Posts: 197
Likes: 0
From: bay area CA
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
If the only problem with the LS7 is the valves, wouldn't everybody that owned one have Trickflow heads installed, with a FAST intake? There's got to be more than just valve issues? BTW, pretty sure you can use LS1-6 heads on LS7 blocks.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
Safety Car
Joined: Mar 2004
Posts: 4,434
Likes: 18
From: Bartlett IL
St. Jude Donor '07-'08-'09-'10-'11
No.. because 99% of the LS7's running around stay stock.. 99% of the people DONT like to mod their cars to that extent. Also, the LS7 exhaust valve dropping issue is about as common or less than the LS6 valve spring issue. You guys are totally blowing this out of proportion.
Safety Car
Joined: Jul 2009
Posts: 3,990
Likes: 74
From: Bay Area CA
Keep your C6Z, get heads if your that worried only like 2 have failed with heads and one of those was done by a subpar installer the other was a race car
http://forums.corvetteforum.com/1581453441-post129.html
http://forums.corvetteforum.com/1581451671-post102.html
http://forums.corvetteforum.com/1581453441-post129.html
http://forums.corvetteforum.com/1581451671-post102.html
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Burning Brakes
Joined: Jun 2000
Posts: 817
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From: Raleigh NC
Team Owner
Joined: Sep 2003
Posts: 43,084
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From: Raleigh / Rolesville NC
No.. because 99% of the LS7's running around stay stock.. 99% of the people DONT like to mod their cars to that extent. Also, the LS7 exhaust valve dropping issue is about as common or less than the LS6 valve spring issue. You guys are totally blowing this out of proportion.
Lets Repeat that.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
No.. because 99% of the LS7's running around stay stock.. 99% of the people DONT like to mod their cars to that extent. Also, the LS7 exhaust valve dropping issue is about as common or less than the LS6 valve spring issue. You guys are totally blowing this out of proportion.
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
[QUOTE=02sscamaro;1581662570]yes this sounds crazy but hear me out. i bought a 07 z 7months ago all stock 14,000 miles. blown motors are popping up left and right with these cars. stock or modded. i like too mod my cars but this one i cant just dont have that type of cash too throw around. $15,000 4 a motor no thanks. the dealer i bought this z from has a 04 z 9,000 miles 4 31,000 all stock. is it worth it too by the 04 and do cam heads long tubes? the 07 z makes alot of power but most of it in the upper rpm range i would like something more streetable if that makes any sense? not sure what too do?[/QUOTE
For the money you spend on LT's and a cam for the C5Z, you could just pull the heads and send them off to WCCH for some upgrades. Keep what you got...and this is coming from someone who's owned both a C5Z and currently a C6Z.
For the money you spend on LT's and a cam for the C5Z, you could just pull the heads and send them off to WCCH for some upgrades. Keep what you got...and this is coming from someone who's owned both a C5Z and currently a C6Z.
Drifting
Joined: Apr 2008
Posts: 1,464
Likes: 32
From: Ocala FL
No.. because 99% of the LS7's running around stay stock.. 99% of the people DONT like to mod their cars to that extent. Also, the LS7 exhaust valve dropping issue is about as common or less than the LS6 valve spring issue. You guys are totally blowing this out of proportion.
Le Mans Master
Joined: Sep 2009
Posts: 6,937
Likes: 348
From: My interests are mobile
I have a nice, built, plump LS7 on an engine stand waiting for just the right blown Z to come along at just the right price....
Aftermarket heads on mine...so no machining flaws to wreck my stuff either...
Aftermarket heads on mine...so no machining flaws to wreck my stuff either...
Burning Brakes
Joined: Sep 2009
Posts: 1,239
Likes: 2
From: Naples FL
St. Jude Donor '12
With all due respect, there is a bloody ton of incorrect info on here.
The c6 z valve failure is not very rare as stated, do your homework. Tons of posts here and elsewhere about it.
Replace the c6 valve springs? WTH would that accomplish, not even remotely the problem. The problem is either the valve, the guides, or the rockers or some combination of that.
c5z spring failures are NOT common, especially in later years. If that bothers you then spend a few hundred $$ and replace them. Springs are very cheap so who cares.
I will probably own a C6Z some day and the first thing I'll do is replace the heads. IMHO based on what we currently know (and what we don't know) it's the only sure way.
The c6 z valve failure is not very rare as stated, do your homework. Tons of posts here and elsewhere about it.
Replace the c6 valve springs? WTH would that accomplish, not even remotely the problem. The problem is either the valve, the guides, or the rockers or some combination of that.
c5z spring failures are NOT common, especially in later years. If that bothers you then spend a few hundred $$ and replace them. Springs are very cheap so who cares.
I will probably own a C6Z some day and the first thing I'll do is replace the heads. IMHO based on what we currently know (and what we don't know) it's the only sure way.