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C6 Trans Cooler & Brake Cooling

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Old Aug 25, 2004 | 11:48 PM
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Default C6 Trans Cooler & Brake Cooling

Saw a few words about the transmission cooler on the Z51 and the additional cooling to the front and rear brakes.

Does anyone have more detail? Are both up to some light road course work?

Had regular problems with caliper flex and pad taper on my Z06.

Edit: Also saw trans temps of 300+ before I had a transmission cooler installed.

Last edited by TooManyIDs; Aug 29, 2004 at 09:38 AM.
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Old Aug 26, 2004 | 01:02 AM
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Originally Posted by TooManyIDs
Saw a few words about the transmission cooler on the Z51 and the additional cooling to the front and rear brakes.

Does anyone have more detail? Are both up to some light road course work?

Had regular problems with caliper flex and pad taper on my Z06.
The larger Z51 C6 brakes will bolt on a C5 but the ABS system will not work
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Old Aug 26, 2004 | 06:34 AM
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Z11409, sorry I wasn't clear. Not considering a retrofit (sold the Z06).

I'm wondering if a Z51 C6 would be a better track car than the Z06.
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Old Aug 26, 2004 | 06:43 AM
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Default To quote David Hill>>

"C6 with the Z51 package it's a little Z06"

The Z51 brakes are not only larger in diameter (.6" frnt 1" rear) , the swept area is bigger and the rotors are more "massive" to dissipate heat faster.

The pump driven trans (MN6) cooler system was specifically included for the purpose of track use.
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Old Aug 26, 2004 | 06:51 AM
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Originally Posted by C6FirstVette
"C6 with the Z51 package it's a little Z06"

The Z51 brakes are not only larger in diameter (.6" frnt 1" rear) , the swept area is bigger and the rotors are more "massive" to dissipate heat faster.

The pump driven trans (MN6) cooler system was specifically included for the purpose of track use.
I agree that a C6/Z51 is equivalent or better than a Z06.

I guess I'll have to wait until a few are taken out on the track for confirmation of the effectiveness of these changes.
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Old Sep 1, 2004 | 05:51 PM
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Originally Posted by TooManyIDs
I agree that a C6/Z51 is equivalent or better than a Z06.
Oh but it isn't... so far all the mag tests show that dave hill was right on when he said the C6 Z-51 will be 70% Z06.

I agree that the better front brake coolers (which actually blow air on the calipers vs. the tires) and the tranny/rear coolers are a good improvement and will help track longevity, but for performance the Z06 is still ahead.
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Old Sep 1, 2004 | 06:30 PM
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Originally Posted by Cobra4B
Oh but it isn't... so far all the mag tests show that dave hill was right on when he said the C6 Z-51 will be 70% Z06....for performance the Z06 is still ahead.
Cobra4B,
That would make for an interesting debate. I wonder how much is diplomacy to maintain the "desired" pecking order? I saw that percentage somewhere, didn't Hill quote it as being a higher number?

I'd have to go pull the weights and compare specs in more detail (so just a personal guesstimate), but if you added the FE4 suspension bits to the C6, I'd have to think it would be right on a Z06's tailpipes, if not sharing the same piece of track.

If any C6's show up in your group, please let me know. Very interested in how it holds up. Thanks.
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Old Sep 1, 2004 | 07:28 PM
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Apparently, they are 80 pounds apart. Does that sound right?
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Old Sep 1, 2004 | 08:57 PM
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Originally Posted by TooManyIDs
Cobra4B,
That would make for an interesting debate. I wonder how much is diplomacy to maintain the "desired" pecking order? I saw that percentage somewhere, didn't Hill quote it as being a higher number?

I'd have to go pull the weights and compare specs in more detail (so just a personal guesstimate), but if you added the FE4 suspension bits to the C6, I'd have to think it would be right on a Z06's tailpipes, if not sharing the same piece of track.

If any C6's show up in your group, please let me know. Very interested in how it holds up. Thanks.
There are some dyno results in other threads in this forum.
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Old Sep 1, 2004 | 09:47 PM
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Originally Posted by RedC6Coupe
There are some dyno results in other threads in this forum.
I saw that image (and saved it), but the home pages appear to be down, was going to repost. Looking at the curve, the C6 had more torque (much more) and hp all the way up to about 6,200rpm, where the Z06 went past.

With the weight so close, I still suspect it would come down to suspension out on the track and the reviews seem to agree that the C6 is friendlier, easier to get on the power exiting. If someone were to upgrade their C6 to Z06 suspension specs, well...

Again, real world experience will reveal all soon enough.
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Old Sep 1, 2004 | 10:16 PM
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No, I'm talking about more recent dyno results. See below.

http://forums.corvetteforum.com/showthread.php?t=893945
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Old Sep 1, 2004 | 11:32 PM
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Motor Trend and Car& Driver both have great C6 articles. 1/4, skid pad, slalom the C6 z-51 is nipping on the heels of the Z06. Yes... put the FE-4 susp and Z06 wheels/tires and I'm sure the car would be right there. The power is the same, but the Z06 is lighter, stiffer, and still has slightly better gearing (not much). All that said... it'll be great to see what a broken in C6 does in the hands of someone like J-rod.
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Old Sep 2, 2004 | 12:34 AM
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Gears 1-4 on C6 Z-51 are the same as C5 Z06, but C6 Z-51 has a slightly taller fifth so it is drag limited to a top speed of 186 rather than being rev limited to a little over 170.

Duke
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Old Sep 3, 2004 | 04:37 PM
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Just got home from my local Chev store where I got to look at a Z51 C6 while it was on a lift and the new brakes look like they're a very nice improvement over the C5. In addition to the rotors being larger they have thicker surfaces and smaller vents and look like they should perform better on the track. The calipers and pads look to be a bit larger as well but I'm not certain. The rear brake cooling setup is pretty neat, too, with the intake underneath and just forward of the wheelwell. The ducting, however, won't allow a much wider(maybe 1/2")wheel without modification.
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Old Sep 4, 2004 | 01:21 AM
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I was told from a very good source that only the rotor is larger on the C6 Z51 package. The base car as well as the Z51 supposedly uses the same calipers and pads as the C5 did. The cooling, I was told, was done aerodynamically although the cutaway pictures I have seen of the C6 seems to show some front and rear cooling ducts.

Like the C5, I suspect some additional cooling, better fluid, and better pads will be required to seriously track the C6.
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Old Sep 4, 2004 | 09:21 AM
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Brian,
One of the reviews mentioned stiffer calipers and I hope they were right. Fluid change would be a given.

Ideally, it could take a few sessions at the Ranch without pad tapper and the sinking brake pedal. I would call that a light work out compared to what some of you are doing.
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