Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
HeadlightArmor
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > General Camaro Forums > Camaro Z/28 Forum - Z/28 Specific Topics

Camaro Z/28 Forum - Z/28 Specific Topics Discussions related to the 5th gen Camaro Z/28 model

Reply
 
Thread Tools
Old 11-22-2014, 01:37 PM   #1
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
Is the 427 in the z28 same as the 427 in c6 z06?

Hennessy guy on YouTube who fit a H package on a z28 said the heads aren't the same ,

If thats true and I believe him why did Chevy do this ?

Is it a sub 427 ? Save money ?

He said they did it to get better flow because it's not the same 427 as on the z06
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 02:09 PM   #2
gto406
 
Drives: 1972 GTO, 1969 Firebird
Join Date: Dec 2013
Location: Detroit MI,
Posts: 36
Pretty certain they are both LS7's (assuming we are talking about a c6 Z06).

The 2013 c6 Z06 was rated at 505hp, and 470lb-ft of torque whereas the 2015 Z/28 is 505hp and 481lb-ft of torque.

More info on the 427 here: http://www.chevrolet.com/performance...gines/ls7.html

2014 overview/specs on Z/28 based LS7: http://media.gm.com/media/us/en/gm/n...-z281-ls7.html

Last edited by gto406; 11-22-2014 at 02:20 PM.
gto406 is offline   Reply With Quote
Old 11-22-2014, 02:56 PM   #3
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
Yes but I'm saying the Hennessy guy says the heads are actually different

So the heads are not the same as the ones on the z06 427
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 03:27 PM   #4
Zslash28
Jumanji
 
Zslash28's Avatar
 
Drives: 2014 - AGM - Z/28 - #181 - No A/C
Join Date: Mar 2014
Location: Joursey
Posts: 249
A quick search regarding the Z06 and Z/28 heads brings up exactly the same info on the Corvette Museum site (Z06) and the GM media site (Z/28).

Post up the youtube Hennessy guy, I want to hear what he has to say...
Zslash28 is offline   Reply With Quote
Old 11-22-2014, 04:02 PM   #5
Boother
 
Drives: 14 ZL1
Join Date: Mar 2014
Location: Calgary
Posts: 50
Quote:
Originally Posted by Kokoa87 View Post
Hennessy guy on YouTube who fit a H package on a z28 said the heads aren't the same ,

If thats true and I believe him why did Chevy do this ?

Is it a sub 427 ? Save money ?

He said they did it to get better flow because it's not the same 427 as on the z06
The HEADERS are different, not the heads.
Boother is offline   Reply With Quote
Old 11-22-2014, 04:22 PM   #6
Skylane765
Splitter washers, jack pd

 
Skylane765's Avatar
 
Drives: 13 ZL1, 14 Z/28, Cessna 182T
Join Date: May 2012
Location: San Diego
Posts: 2,814
Quote:
Originally Posted by Kokoa87 View Post
Hennessy guy on YouTube who fit a H package on a z28 said the heads aren't the same ,

If thats true and I believe him why did Chevy do this ?

Is it a sub 427 ? Save money ?

He said they did it to get better flow because it's not the same 427 as on the z06
We have formed headers on the LS7 Z28 the Vett does not, that's what gave a little more power to the Z28.
__________________
Skylane765 is online now   Reply With Quote
Old 11-22-2014, 04:51 PM   #7
gto406
 
Drives: 1972 GTO, 1969 Firebird
Join Date: Dec 2013
Location: Detroit MI,
Posts: 36
As noted elsewhere (media.gm.com...)

"The LS7 exhaust system for the Z/28 is unique and features a tri-Y header design to take advantage of the V-8’s firing order. Primary pipe pairings join cylinders one and five, then three and seven on the left bank, with cylinders two and four and six and eight paired on the right bank. At each bank, the primary pairings collect into a secondary Y, delivering a combination of pulse separation of adjacent firing cylinders and improved scavenging for the engine’s firing order of 1-8-7-2-6-5-4-3. A dual-mode exhaust system and large, three-inch-diameter pipes complement the manifolds’ tuning and low restriction. The optimized header and exhaust system improves torque and sound quality from the LS7 engine"

Explains the bump in the Z's torque rating vs. c6/Z06.
gto406 is offline   Reply With Quote
Old 11-22-2014, 06:14 PM   #8
DrkPhx

 
DrkPhx's Avatar
 
Drives: 2013 Triple Black ZL1 / 2006 TB SS
Join Date: Feb 2011
Location: St Michael, MN
Posts: 979
I thought some of the internal components like the pistons were changed?
DrkPhx is offline   Reply With Quote
Old 11-22-2014, 06:55 PM   #9
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
Quote:
Originally Posted by Zslash28 View Post
A quick search regarding the Z06 and Z/28 heads brings up exactly the same info on the Corvette Museum site (Z06) and the GM media site (Z/28).

Post up the youtube Hennessy guy, I want to hear what he has to say...

http://m.youtube.com/watch?v=j9UoCo9vheQ
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 06:56 PM   #10
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
Quote:
Originally Posted by Boother View Post
The HEADERS are different, not the heads.

Ok that makes sense. Thanks for the input

Just wanting to find out if gm went cheap on it for the z28
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 07:51 PM   #11
Zslash28
Jumanji
 
Zslash28's Avatar
 
Drives: 2014 - AGM - Z/28 - #181 - No A/C
Join Date: Mar 2014
Location: Joursey
Posts: 249
Quote:
Originally Posted by Kokoa87 View Post
Just wanting to find out if gm went cheap on it for the z28
This makes no sense. The LS7 heads are a very sophisticated head design. It would be foolish for GM to change the design to other than the best on their flagship Camaro.

I wish the guy on YouTube was specific other than a blanket statement about the heads that only casts doubt and brings up questions that have no answers. He also says the ZL1 feels like it has more grunt than a Z/28, I laughed when I heard this,...duh, it has a supercharger.

Edit: I believe the Hennessy guy mentioned they ported the factory heads. IIRC there was some debate about the porting and removal of the intake port deflector located just prior to the valve.

Last edited by Zslash28; 11-22-2014 at 08:18 PM.
Zslash28 is offline   Reply With Quote
Old 11-22-2014, 08:02 PM   #12
Splitter
UM 170
 
Splitter's Avatar
 
Drives: '14 RRM 1LT/RS A6/NPP
Join Date: Mar 2009
Location: Cape Cod, MA
Posts: 703
Send a message via AIM to Splitter Send a message via MSN to Splitter Send a message via Yahoo to Splitter
Quote:
Originally Posted by Zslash28 View Post
duh, it has a supercharger.
This.
__________________
Permagrinning

1) 1995 Red Ford Explorer Eddie Bauer Edition (Eddie Badges +5RWHP) - Sold!
2) 2005 Silver Dodge Magnum R/T RWD (Magnaflow Catback, Airaid CAI, TBS, PD'd wheels, front & rear fascia) - Traded In!
3) 2014 RRM Chevrolet Camaro 1LT/RS A6/NPP - Cruisin!
Splitter is online now   Reply With Quote
Old 11-22-2014, 08:04 PM   #13
soulsea
eleseven
 
soulsea's Avatar
 
Drives: 15 Z/28
Join Date: Sep 2014
Location: Mt Pleasant SC
Posts: 100
We're talking about Hennessey here ... I wouldn't trust them to do an oil change.
__________________
2015 Z/28

DD: Full Size RR V8SC
soulsea is online now   Reply With Quote
Old 11-22-2014, 08:54 PM   #14
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
Ya I understand but I don't trust GM either. They do what they can to cut costs
Mark it up and say wow look at this !

So I'm just trying to find out the truth before I get one or not
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 08:55 PM   #15
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
I wouldn't trust gm to do an oil change at a dealer either
Hahahahahaha

Been there done that.

Worst is gmc Buick carnige Ave Cleveland Ohio
Was a hummer dealer before
Never go there
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 10:46 PM   #16
X25

 
X25's Avatar
 
Drives: '14 AGM 1SS 1LE
Join Date: May 2012
Location: Redmond, WA
Posts: 867
Quote:
Originally Posted by Kokoa87 View Post
I wouldn't trust gm to do an oil change at a dealer either
Hahahahahaha

Been there done that.

Worst is gmc Buick carnige Ave Cleveland Ohio
Was a hummer dealer before
Never go there
You're talking about a dealer, not GM.

If GM wanted to cut costs, they'd start from the dry-sump. I think GM product quality, especially on sport models, is pretty descent. Don't let a blunder with a $5 ignition lock set recall fool you.
__________________
'14 AGM 1SS 1LE Build Thread
'13 Mazda MX-5 Club Build Thread
'14 RAM 1500 Quad Cab Hemi
'13 Nissan Leaf
'08 Kawasaki ZX-10R
X25 is online now   Reply With Quote
Old 11-22-2014, 11:26 PM   #17
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
No I'm taking about BOTH

GM won't stand behind some crappy dealers when their own customers tell them
About the dealers fraud. So I am talking about both

The dealer can't put a cap on an h2 hood. And gm says oh it's the dealer

No respect for them after they hide behind the junk they support
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 11:28 PM   #18
Kokoa87
 
Drives: 1968
Join Date: Nov 2014
Location: Cuyahoga falls ohio
Posts: 17
No sir I'm not.

I'm talking about my own experience

But I agree. The sport gm upgrade models like z28 z 06 are
Good quality for most part

I think it's because there are special teams that do those cars
Gm stays away

But I agree
Kokoa87 is offline   Reply With Quote
Old 11-22-2014, 11:45 PM   #19
Zslash28
Jumanji
 
Zslash28's Avatar
 
Drives: 2014 - AGM - Z/28 - #181 - No A/C
Join Date: Mar 2014
Location: Joursey
Posts: 249
Zslash28 is offline   Reply With Quote
Old Yesterday, 12:04 AM   #20
Angrybird 12
Retired, Cancer Survivor
 
Angrybird 12's Avatar
 
Drives: 12 CAMARO 1LT, 08 Vue, 14 Spark
Join Date: Dec 2007
Location: J. C. Tennessee
Posts: 18,150
Quote:
Originally Posted by Kokoa87 View Post
I wouldn't trust gm to do an oil change at a dealer either
Hahahahahaha

Been there done that.

Worst is gmc Buick carnige Ave Cleveland Ohio
Was a hummer dealer before
Never go there
Don't know of anyone in their right mind that would go to Cleveland in the first place..... I mean even their NFL team is named after the dullest color in the Crayola box.....
__________________
Cancer's a bitch! Enjoy life while you can! LIVE, LOVE, DRIVE...CAMARO!

Previous Camaros: 1974, 1979 and 2010.
Angrybird 12 is online now   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:40 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.