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[Z06] New heads, headers, and Akrapovic

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Old 03-12-2013, 12:59 AM
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Alberta_Z06
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Default New heads, headers, and Akrapovic

I finally finish the "winter" project after a bit of a shopping spree with some of the forum vendors. Thanks again to Precision Race Components (PRC), Maryland Speed, and Southern Car Parts for the extremely fast service and great products.

I gave my 06 a decent update last month to further compliment the Livernois stage 2 cam. Updates included a new set of PRC 265cc heads with titanium intake and stainless steel exhaust valves, Kooks 1 7/8 long tube headers, Kooks 3" catted x-pipe, and a Akrapovic stainless slip-on to finish it all off.


The car sounds absolutely amazing and I can't wait for the snow to melt and roads to be cleaned so I can drive it...only another 2 months or so.

On a side note, I noticed that with the new heads my valve train is significantly quieter. The "sewing" machine sound that I had previously, is essentially gone.

Old 03-12-2013, 01:18 AM
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'06 Quicksilver Z06
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Congrats, and enjoy.
Old 03-12-2013, 05:35 AM
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Sounds great!
Old 03-12-2013, 09:12 AM
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briancb1
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Solid stainless exhaust valves?

Everyone knows they are about 3 more pounds than the stock exhaust valves and will kill performance, float and make the engine "rev" slower.

Other than that, congrats on the build
Old 03-12-2013, 09:48 AM
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EX1
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Nice upgrades. Now turn your phone to landscape mode so your videos aren't in that format lol.
Old 03-12-2013, 11:14 AM
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Sounds Good
Old 03-12-2013, 11:16 AM
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Kcyellowz06
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Wow car sounds amazing, I have a yellow z too with akrapovic evo and hall tech cai. Gonna get the heads done soon Maybe cams . Can you do some revs videos or flyby , that's be awesome
Old 03-12-2013, 11:34 AM
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5280Racer
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She has nice chop.. sounds great man.
Old 03-12-2013, 01:26 PM
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Love the Sound
Old 03-12-2013, 02:06 PM
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Nathanknorr
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Your Car sounds awesome. I am also on the waiting list for winter to politely leave.
Old 03-12-2013, 04:05 PM
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RedZ4me
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Originally Posted by Kcyellowz06
Wow car sounds amazing, I have a yellow z too with akrapovic evo and hall tech cai. Gonna get the heads done soon Maybe cams . Can you do some revs videos or flyby , that's be awesome
Cams? only one cam
Old 03-12-2013, 07:43 PM
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Sm5654
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After I did the heads and cam, my valve train with the upgraded valves @ guides is significantly louder. I have heard it go both ways, anyone know why?
Old 03-12-2013, 08:06 PM
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'06 Quicksilver Z06
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Originally Posted by Sm5654
After I did the heads and cam, my valve train with the upgraded valves @ guides is significantly louder. I have heard it go both ways, anyone know why?
Are you using dual springs and stainless steel valves in your package?
Old 03-12-2013, 08:17 PM
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Sm5654
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St. Jude Donor '13
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Originally Posted by '06 Quicksilver Z06
Are you using dual springs and stainless steel valves in your package?
Yes sir that is correct.
Old 03-12-2013, 10:40 PM
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WhiteDiamond
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Originally Posted by Sm5654
After I did the heads and cam, my valve train with the upgraded valves @ guides is significantly louder. I have heard it go both ways, anyone know why?
What did you set your lifter preload too?


On topic, the OPs Z sounds GREAT!!!
Old 03-12-2013, 10:58 PM
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Sm5654
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Originally Posted by WhiteDiamond
What did you set your lifter preload too?


On topic, the OPs Z sounds GREAT!!!
I have no idea what the lifter preload was set to... I'd have to ask the shop. Could something be wrong with my valve train if it's loud? I mean it is noticeably louder. I had nearly no sewing machine noise before, but it's definitely there now. Could the headers make this louder too?
Old 03-12-2013, 11:00 PM
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WhiteDiamond
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Originally Posted by Sm5654
I have no idea what the lifter preload was set to... I'd have to ask the shop. Could something be wrong with my valve train if it's loud? I mean it is noticeably louder. I had nearly no sewing machine noise before, but it's definitely there now. Could the headers make this louder too?
Yes, lifter preload can increase/decrease valve train noise. Headers always increase valve train noise on the LSx series of motors. I have never met an LSx with headers that wasn't louder after header install than before.

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To New heads, headers, and Akrapovic

Old 03-13-2013, 12:56 AM
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Alberta_Z06
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Originally Posted by briancb1
Solid stainless exhaust valves...they are about 3 more pounds than the stock...will kill performance, float and make the engine "rev" slower.
There is just no winning on the heads...either they're going to drop a valve at any minute or the valves are just too heavy for the car "rev" properly

Originally Posted by EX1
Nice upgrades. Now turn your phone to landscape mode so your videos aren't in that format lol.
I know, I know...I was just to lazy to go back out and re-record after I had starting uploading that video. I already created and edited a slightly better one with a cold start and warm idle/rev, but the audio just doesn't seem to do it any justice...second video

Originally Posted by Kcyellowz06
....Can you do some revs videos or flyby , that's be awesome
I will post more once I get the tune finalized and the snow vanishes so I can actually drive it. The second video I posted has a few more variations of the car idling and revving.

-Tyler
Old 03-13-2013, 01:11 AM
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Boba Fett
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Old 03-13-2013, 09:59 PM
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Kcyellowz06
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Originally Posted by RedZ4me
Cams? only one cam

Thanks for correct me on the cams i always thought mine Ls7 was DOHC



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