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Kooks headers = 25 RWHP

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Old Dec 30, 2004 | 11:07 PM
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Default Kooks headers = 25 RWHP

The Vette Doctors installed Kooks headers (w/ high flow cats and x-pipe) along with Corsa Sport exhaust on my otherwise stock automatic Z51 with 900 miles on it. Before 328.2 RWHP ... After 353.2 RWHP ... a gain of exactly 25 RWHP without any tuning. The C6 is definitely suffering from the Big Brother party pooper known as "Torque Management". The dyno graph was like a roller coaster as the computer pulled timing as the car was trying to make power, particularly midrange 4000-5000 RPM. The C6 should respond very well once tuning is available.

Also replaced the stock Z51 brake pads with ceramic pads. No more squeaky brakes!
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Old Dec 31, 2004 | 12:10 AM
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Originally Posted by c5grandsport
The Vette Doctors installed Kooks headers (w/ high flow cats and x-pipe) along with Corsa Sport exhaust on my otherwise stock automatic Z51 with 900 miles on it. Before 328.2 RWHP ... After 353.2 RWHP ... a gain of exactly 25 RWHP without any tuning. The C6 is definitely suffering from the Big Brother party pooper known as "Torque Management". The dyno graph was like a roller coaster as the computer pulled timing as the car was trying to make power, particularly midrange 4000-5000 RPM. The C6 should respond very well once tuning is available.

Also replaced the stock Z51 brake pads with ceramic pads. No more squeaky brakes!
So your 328 was with the high-flows... and the x-pipe?

Or you got 25 with all of that?
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Old Dec 31, 2004 | 09:54 PM
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Originally Posted by PhoenixINX
So your 328 was with the high-flows... and the x-pipe?

Or you got 25 with all of that?
No, 328.2 was bone stock. Then we put on Kooks headers (which come with x-pipe and cats as a unit) and Corsa exhaust. 328.2 RWHP is 18% drivetrain loss off 400 flywheel HP, which is to be expected with an automatic and 3.15 gears (and no tuning!).
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Old Jan 1, 2005 | 11:22 AM
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Nice
No reason why you wont see 40 + hp what tuneing is available.
Wht did the setup cost you for the headders and exhaust?
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Old Jan 1, 2005 | 03:45 PM
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make sure you get them Ceramic Coated!!!
most companies don't really ceramic coat them. when they say they are coated they dip plate the outside with cheap metal!
this doesnt do anything! except peel after a yr! also alot dont even coat inside and out!
get the real ceramic coating!
I will ceramic coat any headers inside and out for $188.
this includes all preping, 3 yr warranty, and a limited lifetime rust warranty. !!!!!!!
this is the best price/guarentee out there!
please email me and let me know!
your friend
Sean Blanton
slimshaby@mindspring.com



congrats on the LTs!
LS2 for life!
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Old Jan 1, 2005 | 10:38 PM
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Why would he get the ceramic coated when they are stainless?
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Old Jan 2, 2005 | 01:36 AM
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Originally Posted by jabbott
Why would he get the ceramic coated when they are stainless?
It helps with heat control, a coated header will be slightly cooler on the exterior than a non-coated header. It's not all that necessary, but a nice touch for people in hot summer areas...like here in Phoenix!
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Old Jan 2, 2005 | 02:14 AM
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the ceramic coating will lower underhood temps and thus give you hp!
also ceramic coated headers will out last the non coated!
regular headers will get a good 3-5 yrs before warpage or coat peeling.
ceramic coated headers will go the lifetime of your car or more!
also many people argue about what they think it does, but its test proven and race proven that it works!
so I am not going to argue but why do you think so many manufacturers try and imitate it?
your friend
Sean
slimshaby@mindspring.com
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Old Jan 2, 2005 | 02:46 AM
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Like the man says...ceramic coat the headers. The car will be cooler under the hood...
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Old Jan 2, 2005 | 10:29 AM
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Originally Posted by c5grandsport
Before 328.2 RWHP ... After 353.2 RWHP
only 328 bone stock? that sounds atypically low to me....i thought that most C6s were into the 340 range.....
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Old Jan 2, 2005 | 11:53 AM
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Originally Posted by Lee6
only 328 bone stock? that sounds atypically low to me....i thought that most C6s were into the 340 range.....
It is an auto. The numbers seem to be very close to what others with the A4 have posted.
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Old Jan 2, 2005 | 02:12 PM
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Originally Posted by Brett Hunter
It is an auto. The numbers seem to be very close to what others with the A4 have posted.
Also Z51 3.15 gears hurt dyno #'s slightly. Understand once LS2 Edit is available we should certainly improve these numbers by custom tuning and eliminating Torque Management.
P.S. I wasn't counting on this thread turning into an advertisement for ceramic coating, just wanted to report real world gain on headers.
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Old Jan 2, 2005 | 05:05 PM
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What kind of numbers would you expect with the kooks and x pipe with highflos but the stock cat back, if that is even possible.
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Old Jan 2, 2005 | 08:44 PM
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so you basicaly spent about 3k to get 25 hp, it doesn't sound like a good deal to me at all... sorry
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Old Jan 2, 2005 | 09:35 PM
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Originally Posted by Yogivette
What kind of numbers would you expect with the kooks and x pipe with highflos but the stock cat back, if that is even possible.
Probably wouldn't lose more than 5 Hp. I did the Corsa more for sound and looks rather than expecting any real gain.
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Old Jan 2, 2005 | 09:49 PM
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Originally Posted by SlowAzzVette
so you basicaly spent about 3k to get 25 hp, it doesn't sound like a good deal to me at all... sorry
Well it was less than 3K, and it was worth it to me because I can FEEL the difference across the entire RPM range, which makes driving the car alot more fun. Also now SOUNDS like a vette should. Of course, once tuning is available, there will be more ponies unleashed.
Listen, unlike the C5, which responded to simple, cost effective mods like intake and cat back exhaust, the C6 requires more expensive mods to show any real gains. Bottom line is the engineers left much less on the table with the C6 intake/exhaust design than with the C5. If you like yours the way it is, that's great, but some of us want a little more and are willing to pay the admittedly steep price.
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Old Jan 2, 2005 | 10:07 PM
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It always comes down to the "Laws of Diminishing Returns".I'll have the Filet Mignon thankyou.
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To Kooks headers = 25 RWHP

Old Jan 2, 2005 | 10:19 PM
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Originally Posted by SlowAzzVette
so you basicaly spent about 3k to get 25 hp, it doesn't sound like a good deal to me at all... sorry
The usual intake and exhaust mods don't do much because Chevy already did a good job with the OEM parts. There doesn't seem to be any reason to do intake mods, and exhaust mods are primarily to get more noise.

Headers still help, but not so much, because we can't yet tune the timing and fuel maps in the PCM to take advantage of them. We're all waiting for the software to tune these engines. That's when we can start to pull the full potential from the LS2.

I went through the same cycle with the 350Z. Until Technosquare cracked the computer and gave us a way to tune, mods mostly either didn't make any power, or actually cost some power. Once access to the timing and fuel maps was available, though, we started seeing some significant power gains.
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Old Jan 2, 2005 | 10:50 PM
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Originally Posted by c5grandsport
Well it was less than 3K, and it was worth it to me because I can FEEL the difference across the entire RPM range, which makes driving the car alot more fun. Also now SOUNDS like a vette should. Of course, once tuning is available, there will be more ponies unleashed.
Listen, unlike the C5, which responded to simple, cost effective mods like intake and cat back exhaust, the C6 requires more expensive mods to show any real gains. Bottom line is the engineers left much less on the table with the C6 intake/exhaust design than with the C5. If you like yours the way it is, that's great, but some of us want a little more and are willing to pay the admittedly steep price.

With the new ZO6 expected to be in the F-ing expesive ($75,000.00 Chevy, LOL) range, 3K for 25HP sounds like a bargin with more to come when the code is cracked.
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Old Jan 2, 2005 | 11:10 PM
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Originally Posted by KRAYZ308
With the new ZO6 expected to be in the F-ing expesive ($75,000.00 Chevy, LOL) range, 3K for 25HP sounds like a bargin with more to come when the code is cracked.
Well said!
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