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Old 06-11-2013, 09:51 PM   #1
corvettes4ever
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Default C5 z06 vs c5 coupe

Hey Guys! I am considering getting either one of the above cars. The only reason i'm even comparing them is because I hear that if both where stock the coupe would be faster? By four mph's mind you. Which one if modded would be faster? I have a big budget, and I also would like to know of any things I should do other than: Vararam Cold Air Intake, Headers, X-pipe, B&B Bullet mufflers? The z06 is a 2002, while the coupe is also 2002. Thanks

Oh and one last thing, approximately how much money will I be putting into if I get this, and is it worth it?http://detroit.craigslist.org/okl/cto/3860189500.html
This is the z06 that I'm thinking of getting http://detroit.craigslist.org/mcb/cto/3728928103.html

Last edited by corvettes4ever; 06-11-2013 at 09:54 PM. Reason: Forgot to ask
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Old 06-11-2013, 10:01 PM   #2
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Stop now.....If you can afford a C5 and then pour more money it, stop! Buy a newer C6 and start pouring money in that one.

Just saying.
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Old 06-11-2013, 10:02 PM   #3
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Faster? I guess your talking top speed, which is due to gearing but the Z06 is faster up to the top end, as far as the parts I couldn't tell you how much they would run you. Just choose the car you want, I personally have a 04 silver coupe and love it, maybe one day ill get a Z06 but it will be a C6Z
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Old 06-11-2013, 10:15 PM   #4
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I went through the same dilemma when shopping around. I had the chance to pick up a low mile coupe or my current c5z06 for the same price. I went with the Z, never regreted the choice.
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Old 06-11-2013, 10:18 PM   #5
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Both of those are over priced.
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Old 06-11-2013, 10:23 PM   #6
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35 more base hp to start with the Z....or the open air capability of the coupe (targa)

By the way both links are of Z06s...and the 03 was in an accident - - no brainer to me and the 02 has a clean engine compartment, so with baller money go for the 02.

Or if ya got that big a budget get a C7

C5 - supercharger / twin turbo untill it blows than build a killer forged engine with that budget
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Old 06-11-2013, 10:27 PM   #7
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I have yet to see top speed in my C5 Z06. I've come close but still had some to go. I would say that if you want a car that feels fast, the Z06 will make you happier, even if the coupe is theoretically faster. The only time I remember spending a sustained period of time at terminal velocity was in an Opel Kadet that topped out at about 90 mph.
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Old 06-11-2013, 11:24 PM   #8
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If you are looking for overall performance, there is a reason a Z06 is called "the performance Corvette."

If you put the same dollar amounts in mods on the Z06 and a coupe the Z06 will win.

If you want the coupe for wind in your hair, that is the only advantage with the coupe.
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Old 06-11-2013, 11:31 PM   #9
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Z06 or Coupe?

Convertible! In red.

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Red cars are faster. They did a study on it.
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Old 06-11-2013, 11:33 PM   #10
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Default C5 Coupe vs Z06

Here are many of the differences, taken from an article on the 2001 Z06 when it first debuted. Check the links at the bottom for the many changes for the 2002-2004 Z06's....

Aluminum Block
The aluminum block casting on the LS6 deletes machined holes in the LS1 bulkhead and adds cast-in "windows" that allow better bay-to-bay breathing. On the downstroke, the pistons push air back toward the crankcase, creating backpressure or resistance, and that translates into parasitic horsepower loss because it resists piston motion. With the overtravel windows, air is allowed to move more freely between crankcase bays, thus relieving the unwanted pressure.

Pistons
LS6 pistons are cast from high-strength M142 aluminum alloy and reshaped with a slightly different profile than those in the LS1. In side view, the LS6 pistons have a slight barrel shape, almost imperceptible to the naked eye. The new alloy increases engine durability at racetrack operating levels, while the shape reduces internal mechanical noise.

Increased Compression
The LS6's aluminum cylinder heads are cast with pent-roof combustion chambers that are smaller than the LS1's. Compression ratio increases from 10.1:1 to 10.5:1, improving thermal efficiency and increasing horsepower. Intake and exhaust ports in the LS6 head are refined and more precisely cast, contributing to the engine's overall increase in volumetric efficiency.

High-Profile Camshaft
The LS6-specific, steel-billet camshaft contributes more than any other single piece of hardware to the LS6's horsepower gain. In simple terms, the cam opens the valves quicker and allows more air to flow into the combustion chambers. Cam lift increases from the LS1's 12.7mm to 13.3mm.

Stronger Valve Springs
To accommodate valve operation with the high lift/long duration cam, the LS6's valve springs are stiffer and sturdier. They are made from the same steel wire as those in the LS1 but are wound tighter for a higher spring rate.

Fuel Injectors
Additional air flowing into the LS6 heads would serve no purpose without an equivalent increase in the amount of fuel to take advantage of it. New injectors increase maximum fuel delivery from the LS1's 3.3 grams per second to 3.6 grams per seconds, for a 10 percent improvement.

Internal PCV System
The LS6's application in the Corvette Z06 creates additional demands on the crankcase ventilation system. The Z06 is capable of cornering at more than 1 lateral g, requiring a special high-performance ventilation system. To prepare the Z06 for all-out driving, the LS6's PCV system is moved into the engine's V, or valley. The unique aluminum valley cover incorporates composite oil-separating baffles and PCV plumbing. All of this reduces oil consumption during high-performance driving and, as an added benefit, also reduces the amount of external plumbing, eliminating potential oil-leak sources.

Exhaust Manifolds
Thin-wall cast-iron exhaust manifolds replace the previous stainless steel manifolds to improve durability, given the LS6 engine's potential for being involved in sustained high-speed driving.

Exhaust System
To further maximize the breathing capabilities of the LS6 and significantly reduce vehicle mass, a new titanium exhaust system was developed for the Z06. This marks the first-ever use of titanium in the exhaust system of a mass-production vehicle. The titanium portion of the Z06's exhaust system starts just forward of the rear axle, then goes over the top of the axle to the muffler. The entire muffler, all of its internal parts and exterior skin, the outlet pipes, including the exhaust tips, are constructed of titanium. The Z06 muffler is a completely new design featuring larger-diameter louver tubes inside the mufflers to reduce backpressure and provide less restriction for the exhaust gases flowing through the system. The exhaust tips are different too, with four 3.5-in.-dia. tips to visually set the Z06 apart from the standard Corvette. Titanium offers a lower density than steel, and higher strength than either magnesium or aluminum at all temperatures. It reduces the Z06's weight by 17.6 pounds a whopping 50 percent reduction compared to the weight of the stainless steel exhaust system used on the Corvette coupe and convertible. In addition to easing exhaust gas restrictions, reducing mass and looking distinctive, this exhaust system sounds more aggressive than that of the standard Corvette. Considerable time and effort went into the design and tuning of the mufflers to ensure an exhaust note that would be unique to the Z06.

Powertrain Enhancements
In addition to providing more power and better fuel economy, Corvette engineers upgraded the operation and durability of the rest of the Corvette powertrain.

Stronger Driveshaft
The driveshaft is upgraded from a metalmatrix composite to aluminum alloy 6061, and it is increased in diameter from 55mm to 63mm. Driveshaft couplings have also been upgraded on manual-equipped models for additional strength and durability.

M12 6-Speed Manual
This transmission is unique to the Z06, and is the only transmission available for that model. It is not available on Corvette coupes or convertibles. It has more aggressive gearing to increase torque multiplication in most forward gears, allowing for more rapid acceleration and more usable torque at higher speeds. A transmission temperature sensor was added to protect the M12 from higher thermal stresses. The sensor warns the driver via the Driver Information Center with a TRANS OVER TEMP light if thermal loads become excessive, meaning that the transmission could be damaged if not allowed to cool down.

Gear Ratios
LS1/MM6 LS6/M12
1st Gear 2.66:1 2.97:1
2d Gear 1.78:1 2.07:1
3d Gear 1.30:1 1.43:1
4th Gear 1.00:1 1.00:1
5th Gear 0.74:1 0.84:1
6th Gear 0.50:1 0.56:1
Reverse 2.90:1 3.28:1


Synchronizers
Carbon blocker rings have been installed on all manual transmission forward gears to provide for smoother shifts and additional robustness.

FE4 Suspension
The Z06 features a suspension system all its own designated FE4. It's not available on other Corvette models but is standard equipment on the Z06. It features a larger front stabilizer bar, a stiffer rear leaf spring, revised camber settings and unique shock calibrations, all engineered with a bias toward maximum control during high-speed operation. The suspension component specifications are: Front stabilizer bar diameter (hollow): 30mm with 4.5mm-thick walls. Rear transverse composite spring leaf: 125 N/mm versus 113 N/mm of the Z51. Camber, front and rear: Z06: -0.75 (coupe/convertible: -0.25). The Z06's negative camber helps to keep the tire flatter in relation to the road, and raises the tire contact patch for greater grip while cornering. When coupled with other special Z06 components, the combination provides unparalleled, all-out racetrack performance, which is what the Z06 is all about. During development testing, Corvette engineers were able to generate racetrack speeds that improved Z06 performance by an average of 3 to 4 seconds per lap over last year's hardtop model on typical 2-mile closed-circuit road courses. This we were able to test for ourselves at the Mid-Ohio Sports Car Course in Lexington, where we had the chance to drive a standard coupe and a Z06, back to back.

Wheels
Z06 wheels are wider front and rear than those on the standard Corvette: The new wheels are also one of the visual identifiers for the Z06, letting onlookers know that this car is something special. They are uniquely styled, and are the most mass-efficient aluminum wheels ever produced for Corvette. They are painted a light metallic gray, and show off the Z06's red brake calipers, especially when the car is in motion. Each wheel's center cap has a red Corvette crossed-flags emblem for added identification when the car is at rest.

Tires
Goodyear has specifically designed new wider, stickier tires for the Z06. Called Goodyear Eagle F1 SC (Supercar) tires, they allow the Z06 to handle, brake and perform better than any production Corvette, ever. Sizewise, the new tires differ from the Goodyear Eagle F1 GS EMT tires on coupes and convertibles as follows: While larger, these tires are much lighter than the EMT tires, reducing mass by a total of 23.4 pounds. The Eagle F1 SC tires have an asymmetric tread pattern to enable the fantastic cornering capabilities of the Z06. With the asymmetric pattern, the outside shoulder of the tire performs well in the dry, while the inside tread performs well in the wet. Taking mass out of the tires is extremely beneficial for wheel control because it reduces unsprung weight. It also reduces rotational mass, which improves acceleration and braking performance. Wheel control on the Z06 is also improved due to the more compliant sidewalls on these new, non-EMT tires. Because these tires do not have the "run flat" capabilities of the EMT tires, it was necessary to develop a process for dealing with tire punctures, since Corvettes do not come equipped with a spare tire. In the case of the Z06, a GM Tire Inflator Kit is included that is capable of sealing punctures up to 5mm in diameter. The kit consists of a squeeze bottle filled with a non-flammable latex compound in an aqueous base, a nozzle that attaches to the tire valve, and a mini air compressor with a 12-volt adapter that plugs into the car's accessory power outlet. The latex compound in the tire inflator kits is not compatible with the tire valves used in Corvette's standard tire pressure monitoring system, so regular tire valves are used and that option is not offered on the Z06. There is a mass reduction of just over a half-pound as a result.

The Z06 receives several other refinements in addition to its unique engine, suspension, wheels and tires that either help it to be more functional or serve to differentiate its appearance, sometimes both.

Having the best of both worlds reduced weight and increased power makes the Corvette Z06 a force to be reckoned with, on or off the track.

Air Management
Functional air inlets in the center of the front fascia deliver cool air to the intake system. New air scoops on the rear rocker panels funnel air to the rear brakes for better cooling. Z06 rear brake temperatures are reduced by as much as 10 percent under competition conditions. Brake fade and wear are greatly reduced.

Appearance
Z06 emblems are placed on the front fenders. Front and rear disc brake calipers on the Z06 are painted red. Inside, the Z06 includes a different instrument cluster with stylized graphics and a higher 6500 rpm redline.

The Z06's leather-trimmed seating surfaces include additional side bolstering to hold driver and passenger firmly in place during high lateral load maneuvers, and a Z06 logo is embroidered into the headrests.

You can read more in the following 2 links. The first link is from when the 2001 Z06 was introduced and the second shows the changes for the 2002 model year Z06. The 2003-2004 Z06's were the basically the same as the 2002 except for the shocks in the '04:

2001 Z06 info: http://www.z06vette.com/01.php


2002 thru 2004 Z06 info: http://www.z06vette.com/02.php

2001 thru 2004 Z06 info: http://www.corvetteactioncenter.com/...l#.UbfqaUnD_IU
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Old 06-11-2013, 11:35 PM   #11
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35 more base hp to start with the Z....
More like 55 base hp with the Z (405 vs 350).

If you haven't done so, test drive each of them. You should be able to tell fairly quickly which one really feels best for you.
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Old 06-11-2013, 11:44 PM   #12
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I've had both (2000 Coupe and my current 2003 z06). The power difference is very, very noticeable. If I had to go back and choose again, I'd go with the z06. Sure the coupe has a higher top speed, but where are you going to go that you can hit 185mph to find out? On the other hand, you will most definitely notice the acceleration difference everytime you run up against another car.

All that being said, there will always always always be someone faster. I do miss taking the top off my car.
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Old 06-11-2013, 11:58 PM   #13
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I enjoy riding topless.... Ill sacrifice 55hp for the targa.....
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Old 06-12-2013, 12:12 AM   #14
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Originally Posted by sfc rick View Post
Stop now.....If you can afford a C5 and then pour more money it, stop! Buy a newer C6 and start pouring money in that one.

Just saying.

This^^^^
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Old 06-12-2013, 12:14 AM   #15
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Like Jack said you should be able to tell fairly quickly which is more powerful. The acceleration difference between the Z06 and Coupe is very noticeable.

I wish I had the choice like Maxx did between a higher mileage Z06 or low mileage coupe for the same money, I probably would have gone with the Z06.

BUT now that I have had my Coupe as a DD for a little over a year I am enjoying it just as much as I would have the Z06. (I think hahah) Yeah the boost in HP would be nice but there is always someone faster than you. I don't track my car so I don't worry about that anyways. Yeah a pull here and there between another car on the highway but nothing EXCESSIVE.

What it comes down to for me is a few things:

I enjoy taking the targa off. There is nothing like the enjoyment of removing the panel and feeling the wind in your hair, the exhaust note is much louder and it adds the enjoyment that more power could give you.

I, unlike most enjoy the F45 Selective Ride Control. (If the coupe you are looking at is equipped with it) If I'm on the highway doing 70 in 6th gear getting 30+ MPG with the setting in Touring it feels like any other car. It really absorbs the bumps and will give a decent "float" if you will. On the other hand... switch over 2 spots to Performance, downshift to 3rd and take an off ramp at 55-60... that's where its at. Noticeably different. I like being able to choose especially being a DD in the fair weather months.

And last but not least is storage capacity!! The coupe has a remarkably large storage area with the domed rear hatch. Fit the targa and a long weekends worth of clothes for two people and other amenities... Can't do that in a Z06. I also like the lines of the coupe as opposed to the look of the FRC. But then again that is subjective.

Lots to consider if it is just a weekend cruiser or more of a DD. I like the all around greatness the Coupe provides.
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Old 06-12-2013, 12:18 AM   #16
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Z06 is the much better car by far.
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Old 06-12-2013, 12:45 AM   #17
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Buy whichever one you like the looks of better thats what i did.
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Old 06-12-2013, 12:51 AM   #18
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Quote:
Originally Posted by sfc rick View Post
Stop now.....If you can afford a C5 and then pour more money it, stop! Buy a newer C6 and start pouring money in that one.

Just saying.
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Old 06-12-2013, 07:27 AM   #19
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Quote:
Originally Posted by oh1vette View Post
C5 - supercharger / twin turbo untill it blows than build a killer forged engine with that budget
Supercharger is amazing.

Quote:
Originally Posted by K9Leader View Post
Z06 or Coupe?

Convertible! In red.

K9Leader
Red cars are faster. They did a study on it.
with this guy, but in Yellow.
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Old 06-12-2013, 08:15 AM   #20
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Go with what looks best to you. I'm not a big fan of the FRC body style, so going with a coupe was a no brainer for me. It has less HP than a Z06, but it still has enough for me, and with Z51, handling is great.
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Old 06-12-2013, 08:15 AM
 
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