Why does the 01 Z06 make less hp?
Thread Starter
Intermediate
Joined: Dec 2017
Posts: 44
Likes: 5
Why does the 01 Z06 make less hp?
So what is it that makes the 2001 z06 make less hp than the 02-04?
I've had 2 c6 z06 and a base model c6 but and after selling my z06 for a boat and a truck I want a c5 Z and I've found one that's a 01 with 60k miles with just an exhaust for 15k
I just want to know if it's worth getting a 01 or go for the 02-04? It has looks headers, x pipe, and an intake. So wouldn't it push it toward the 405 hp mark?
I've had 2 c6 z06 and a base model c6 but and after selling my z06 for a boat and a truck I want a c5 Z and I've found one that's a 01 with 60k miles with just an exhaust for 15k
I just want to know if it's worth getting a 01 or go for the 02-04? It has looks headers, x pipe, and an intake. So wouldn't it push it toward the 405 hp mark?
Drifting
Joined: Mar 2013
Posts: 1,496
Likes: 353
From: Little Rock Arkansas
The 2001 model was the introductory year for the C5 Z06, and with the LS6 effectively being an "LS1" with Z06 specific goodies it would make sense that it received minor updates up until the end of production to push HP numbers, which is exactly what happened. Remember the third generation small block "LSx" was still effectively in infancy during this time period so when the C6 rolled around building a Z06 specific drive train was much easier.
In regards to the LS6 in the Z06, revisions to gradually increase power included valves and their springs, aggressive timing (not much of a concern nowadays as anyone can tune a PCM), and eventually a Z06 specific filter assembly that had a larger CFM (also easily replicated on early or non-Z06 cars by either switching to a Z06 setup, hacking up, or removing the air filter box ["zip tie mod"]).
In regards to the LS6 in the Z06, revisions to gradually increase power included valves and their springs, aggressive timing (not much of a concern nowadays as anyone can tune a PCM), and eventually a Z06 specific filter assembly that had a larger CFM (also easily replicated on early or non-Z06 cars by either switching to a Z06 setup, hacking up, or removing the air filter box ["zip tie mod"]).
Thread Starter
Intermediate
Joined: Dec 2017
Posts: 44
Likes: 5
The 2001 model was the introductory year for the C5 Z06, and with the LS6 effectively being an "LS1" with Z06 specific goodies it would make sense that it received minor updates up until the end of production to push HP numbers, which is exactly what happened. Remember the third generation small block "LSx" was still effectively in infancy during this time period so when the C6 rolled around building a Z06 specific drive train was much easier.
In regards to the LS6 in the Z06, revisions to gradually increase power included valves and their springs, aggressive timing (not much of a concern nowadays as anyone can tune a PCM), and eventually a Z06 specific filter assembly that had a larger CFM (also easily replicated on early or non-Z06 cars by either switching to a Z06 setup, hacking up, or removing the air filter box ["zip tie mod"]).
In regards to the LS6 in the Z06, revisions to gradually increase power included valves and their springs, aggressive timing (not much of a concern nowadays as anyone can tune a PCM), and eventually a Z06 specific filter assembly that had a larger CFM (also easily replicated on early or non-Z06 cars by either switching to a Z06 setup, hacking up, or removing the air filter box ["zip tie mod"]).
thanks for that. Would anyone say they should be priced a little lower due to the lower hp numbers?
also did anyone do dyno numbers for an 01 and the later years to see how big the difference in powerband and numbers were?
I doubt I'll ever do more than a supercharger. But I think 15k is pretty good for an 01.
Safety Car
Joined: Feb 2013
Posts: 4,346
Likes: 755
From: Greensboro Nc
To be short: cam and pup cats for the most part. I drove many 01-04 z06’s and ended up with an 01 because it was the best color. I actually paid more for the 01 with the same miles and condition as the 03 at the same dealership. Would 100% do it again
Thread Starter
Intermediate
Joined: Dec 2017
Posts: 44
Likes: 5
Nice, I want a blue z06 but there doesnt seem to be many for under 20k with low mileage near me.
Closest one to me has 77k miles for 17k. Has lingenfelter covers and intake but no paper work showing any work was actually done by them.
Le Mans Master
Joined: Jul 2011
Posts: 7,404
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From: Morristown New Jersey
Oldtimer
Txs, please take your time. I found mine in 2011, with 16k and for $24000, two rows behind me at our club meeting! They are out there.
I would have no qualms about an ‘01. Minor mods and a tune and you’re well over 400hp. I am, and I have a base coupe now.
I would have no qualms about an ‘01. Minor mods and a tune and you’re well over 400hp. I am, and I have a base coupe now.
Le Mans Master
Joined: Aug 2009
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From: ALL governments are legalized mobsters, so doesn't matter where I live :(
I'm in Canada, and when the $$$ was good I picked up a C5 in Jersey for a steal. That didn't last and now the US greenback is 30% in your favor. I wouldn't rule out looking north of the border for a C5. Most of the sports cars here are low mileage due to the fact that they are parked for the winter, and with the dollar you can pick one up for a decent price. The process to bring it over the border isn't that bad either, it's just time and travel to do this sort of thing. In any case I wish you luck.
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Banned Scam/Spammer
Joined: Sep 2016
Posts: 4,004
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From: Philadelphia PA (Birthplace of the USA, UNESCO World Heritage City)
Yes, the 2001 Z06s typically sell for $1k-$2k less than 2002-2004 Z06s, unless its Speedway White in color (only offered in 01).
Read this article; there are a number of differences (clutch, suspension, weight savings, HUD became standard) between the 2001 and 2002-2004 Z06s, not just in the engine:
https://www.corvetteactioncenter.com...-release1.html
Not to mention no oil consumption issues after 2001.
Read this article; there are a number of differences (clutch, suspension, weight savings, HUD became standard) between the 2001 and 2002-2004 Z06s, not just in the engine:
https://www.corvetteactioncenter.com...-release1.html
Not to mention no oil consumption issues after 2001.
Last edited by ArmchairArchitect; Oct 31, 2018 at 02:55 PM.
Le Mans Master
Joined: Aug 2009
Posts: 5,197
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From: ALL governments are legalized mobsters, so doesn't matter where I live :(
Kijiji is a big one that can be broken down by province, and also autotrader.ca which you can set the same parameters. Considering its close to winter it might be slim pickings but you never no. You may find some prices over inflated which they are, but you can find some at a decent price as well, just takes some time to look. You can also look at the Canadian events section on the forum under cars for sale and find some there as well, but I think odds are better with kijiji, and autotrader. If you find anything in the Ottawa, Gatineau are under Ontrario search I can always try to help out.
Burning Brakes
Joined: May 2006
Posts: 865
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I'm in Canada, and when the $$$ was good I picked up a C5 in Jersey for a steal. That didn't last and now the US greenback is 30% in your favor. I wouldn't rule out looking north of the border for a C5. Most of the sports cars here are low mileage due to the fact that they are parked for the winter, and with the dollar you can pick one up for a decent price. The process to bring it over the border isn't that bad either, it's just time and travel to do this sort of thing. In any case I wish you luck.
Banned Scam/Spammer
Joined: May 2007
Posts: 15,685
Likes: 1,330
From: Machineguns, because I don’t compromise
Yes, the 2001 Z06s typically sell for $1k-$2k less than 2002-2004 Z06s, unless its Speedway White in color (only offered in 01).
Read this article; there are a number of differences (clutch, suspension, weight savings, HUD became standard) between the 2001 and 2002-2004 Z06s, not just in the engine:
https://www.corvetteactioncenter.com...-release1.html
Not to mention no oil consumption issues after 2001.
Read this article; there are a number of differences (clutch, suspension, weight savings, HUD became standard) between the 2001 and 2002-2004 Z06s, not just in the engine:
https://www.corvetteactioncenter.com...-release1.html
Not to mention no oil consumption issues after 2001.
None.
If you think 02+ cars don’t consume oil then you’ve never driven yours hard. It’s a running joke in the import circles that all LS/LT engines (97-18) drink a quart of oil each time you rev it up.
Melting Slicks
Joined: Feb 2001
Posts: 2,791
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From: Northville, MI
The 20 hp difference was mainly due to the Cam used. The 02+ had about 0.30 more lift. The elimination of the pup cats was about 2.5 hp. When the 02's first came out our club (Detroit based) was fortunate enough to had the chief power-train engineer give us a complete breakdown of the differences and where the hp gain came from
Banned Scam/Spammer
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From: Philadelphia PA (Birthplace of the USA, UNESCO World Heritage City)
Read the article again. Wheels (unsprung weight reduction makes a huge difference) and a suspension component made from aluminum rather than steel.
Safety Car
Joined: Feb 2013
Posts: 4,346
Likes: 755
From: Greensboro Nc
My 01 drinks a quart with every 2500-3000 miles driven, and they're all hard miles. If that bothers you then an LS engine is not for you, unless you only drive below 2500 rpm everywhere you go.
Oddly enough, this car consumes less oil than any of my imports though, and the ls1 I have in my mazda seems to be about the same despite having the newer ls6 pcv system.
Safety Car
Joined: Feb 2013
Posts: 4,346
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From: Greensboro Nc
The wheels are very similar in weight, yet the 01 wheels are forged and far stronger than the 02-04 cast wheels. Not saying the 02-04 wheels are bad, but there is a reason why alcoas sell for twice if not more what a set of speedlines go for. 2001's also don't have HUD so if we're going to nickle and dime weight, that would offset any suspension weight.
Instructor
Joined: Dec 2014
Posts: 111
Likes: 10
From: Nashville
Yes, the 2001 Z06s typically sell for $1k-$2k less than 2002-2004 Z06s, unless its Speedway White in color (only offered in 01).
Read this article; there are a number of differences (clutch, suspension, weight savings, HUD became standard) between the 2001 and 2002-2004 Z06s, not just in the engine:
https://www.corvetteactioncenter.com...-release1.html
Not to mention no oil consumption issues after 2001.
Read this article; there are a number of differences (clutch, suspension, weight savings, HUD became standard) between the 2001 and 2002-2004 Z06s, not just in the engine:
https://www.corvetteactioncenter.com...-release1.html
Not to mention no oil consumption issues after 2001.
I laugh every time I see these recommendations to only buy the 02-04 C5Z. Most people could not distinguish that 20HP difference which the magazine tests confirmed in the day. The oil consumption issues is also always noted (which my car does not experience) but oddly they never mention the spring failures of the 02-03 cars in their comments. Easy to add a quart oil but those spring failures destroy engines.
If you are looking for a showroom stock C5Z to park in your garage then the 04 car was the most improved. If you plan to drive your car and make the usual mods than there are no differenes gained by the 02-04 (even the HUD is an easy add). And if there is any collector value in these cars some day past trends have shown first and last year of a given model span are usually the sought after cars...though I would find better investments myself.
When I was shopping for my car I did not focus on the year but the quality of the car as a platform to create my dream C5Z. Good luck with your search.
Instructor
Joined: Sep 2017
Posts: 105
Likes: 36
From: Homer Glen IL
This is a really good article about the changes GM made to the LS6 for 2002:
http://www.netmotive.net/articles/hib/02ls6/page2.htm
http://www.netmotive.net/articles/hib/02ls6/page2.htm
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
This is a really good article about the changes GM made to the LS6 for 2002:
http://www.netmotive.net/articles/hib/02ls6/page2.htm
http://www.netmotive.net/articles/hib/02ls6/page2.htm
Half is cam/valves, half is intake and exhaust
Funny thing they changed the overlap to maintain a smooth idle (at the sacrifice of a tiny bit of torque), wonder how many would prefer they had a different overlap with a slightly chunky idle.
