Can the 2001 Z's with 385hp get to the 405hp of the later cars with just 1 or 2 simple GM bolt on's? How did the later cars get the extra power?

Thanks!

 

The later Zs have a cam with about .020 more lift and the the pup cats have been deleted from their exhaust system. A set of long tube headers and you'll get your 20 hp.

 

What is the stock cam lift on my 04 Z???

 

I believe 02-04 are all 0.555/0.551 on a 117.5 lsa

The 01 was 0.525//0.525 on a 116 lsa

MMMMMMM?? Make that an extra 0.030 of lift that the 02-04s had.

 

They also got lighter valves, stiffer valvesprings, lower restriction air cleaner cover, no honeycomb in MAS, and minor tuning changes.

 

This is a topic that I have been curious about as well. So I guess with the typical CAI, full exhaust upgrade and a cam swap, the '01 cars can potentially make equivalent horsepower to the '02 - '04 cars with the same mods? It sounds like the lighter valves and upgraded valve train would be the only other upsides.

 

The 01's are oil burners too. about 1 quart every 1500 miles on average. GM replaced the rings in 02-04. Something to do with a ring flutter upon acceleration.

 

Some 01's burned oil not all. Mine has 80k miles and I can go to 10% oil life with no consumption at all. it has never had any work down on it.

 

It was actually ring flutter at high RPM at low engine loads -- ie, like if you held the throttle near constant (not accelerating) at 3500+ RPM.

If you guys who are asking about the differences between the 01 and 02+ Zees, do a search ... there have been many threads on this subject.

Look at post #5 in this sticky right at top of THIS forum.
http://forums.corvetteforum.com/show....php?t=1187875

 

The pretense of singling out the '01 Z06 that is perpetuated concerning excessive oil consumption really shows how ignorant , misinformed or just plain mean some folks can be.

ALL LSx engines (both LS1 and LS6 ) from 1997 thru 2001 are subject to oil consumption higher than GM was comfortable with. Meaning a higher % of complaints concerning oil consumption.

The conditions under which this condition resides is high RPM, light load ( like you drive in a city at 4000 plus RPM and never take it out of second gear). In that situation , the piston rings can get into a flutter condition and thats when the oil consumption can take place.

Four forces are at work in piston ring sealing; combustion PSI, ring inertia , the radial expansion pressure of the rings ( 9 pounds tension), and crankcase PSI. Ring flutter is the uncontrolled oscillation due to an imbalance from those four forces. Once a piston's rings go into flutter , they lose the ability to scrape off the oil from the cylinder walls, blow-by increases and oil consumption rises dramactically.


The combination of high RPM and low crankcase pressure, typical of low engine loads, causes those four forces to become imbalanced. The small amount of '97-'01 LS1s and LS6es that see regular , high RPM, light load operation lend the LSx engines to higher oil consumption.


Who drives around town at 4000 plus RPM at light throttle? Common sense is that sustained high speed and light load is not a normal duty cycle, even for the Corvette. After reseaching the complaints , tearing down engines and finding nothing out of specification or tolerance, it was determined that driver style was the contributing factor.


GM did , starting in the '02 model year, redesign the second scraper ring face and increased ring tension to 13 pounds. No apparent loss in power was measured from the addition of this fix.


Internet conspiracy theories, urban legend and rumor spread rapidly. While the core issue, oil use , has factual basis; it quickly became exaggerated and laced with disinformation.


As far as increasing the '01 LS6 385 hp to 405hp this can be easily done with boltons and some tuning. But the LS6 '02-'04 cam and valve train with it's .026 lift increase and lighter weight valves will give the '02-'04 the advantage when more hp is added to it. GM engineers state that the cam/valve train only adds 10 of the 20 additional hp. Adding the '02 air box and unscreening the MAF will get you 5 hp ( some have had to make slight calibration changes to the PCM).


It's been mentioned that the '02 -'04 fresh air box and unscreened MAF sensor, redesigned 1 brick CATs and elimination of the two quick light up pups ( reduces back pressure by two (2) inches of mercury and 5 1/2 pounds of weight), plus the cam and valve train, and slight changes in the fuel and spark curves was responcible for the additional 20 hp.

 

I have a 29th of May '01 Z06 with no abnormal oil issues. Installed Dynatech supermaxx longtube headers,high flow cats and quad borla stingers with a predator diablo downloaded tune and thats it for the power add ons. Mustang dyno states a 29 HP gain. = 414 HP

 

Do you mean it's possible that I too have this.. I have LG Steets, no cats, Corsa Pace and a street tune? Never Done a dyno (told I don't need it) No oil problems!!!!! 01 Zeees rock!

 

Not true, NOT ALL 01's experienced the problem.
My 01 is bone stock and burns NO oil. (May 02 Build date ) I believe the issue was with early built 01 cars. My car has never been apart.

The extra 20HP will not show up on the street. It will arrive if you are cruising above 120 I suppose but the last time I went to Wallmart I could barely get over 40mph !


t


uhh..
Build date May 01..not 02...

what was I thinking, or..uhh..Typing !

 

only59; with a build date of May'02 you now have an 2002 model Vette!! congratulations!! LOL ( I know you meant 2001 not 2002) Last build date for the '01 model was June 21, 2001. I have a June 18, 2001 build date Z06.
The 2002-2004 LS6 does better from 4000 rpm up. It just breathes better but you're correct in that in a heads up race that doesn't show till high mph.

 

Or the engine seizes up due to oil consumption issues

 

I agree! People love to dog on the 01 Z06 and label it as an oil burner or just plain damaged goods which is. My 2004 currently burns more oil than my 2001 Z06 ever did. I think some people need to pull their heads out of their asses. The low ring tension GM used for some of the 2001 Z06 Vettes was purpose-built, as it was meant to lower friction within the rotating assembly. Too many complaints from misinformed Corvette owners got the tension increased to 13lbs from the lower 9lbs. Seriously though, can we really expect everyone in the Corvette community to be smart?

I really don't see how you 2001 guys put up with these peoples sh*t. Start a petition and get them banned I say.

 

LG Long Tubes with stock Ti exhaust and SLP Black Wing. 30-40 RWHP easy puts you in the same realm with the 405HP cars. Less than $2k installed all bolt-on. Still leaves you room for heads and cam.

If your '01 doesn't use oil, then you aren't driving it correctly! Try holding it at 6200 RPM in 4th or ~142mph in 1/3 mile increments every 1minute 25 seconds in 30-minute blocks. Repeat 4-5 times a day for 2 days. If you don't "use" at least 1.5 quarts of oil your car may have more than one "dipstick". My '01 uses no oil under "normal" conditions.

 

If your '01 doesn't use oil, then you aren't driving it correctly! Try holding it at 6200 RPM in 4th or ~142mph in 1/3 mile increments every 1minute 25 seconds in 30-minute blocks. Repeat 4-5 times a day for 2 days. If you don't "use" at least 1.5 quarts of oil your car may have more than one "dipstick". My '01 uses no oil under "normal" conditions.[/QUOTE]

I like to think of that as it's automatically adding lubrication when I need it the most.

 

but 02+ LS1/6 could burn oil too.

My '00 burned about a quart every 2k miles but my gf's 97 C5 at 125k doesn't burn any oil.