whar components are different between 350hp and 405hp
Thread Starter
Burning Brakes
Joined: Oct 2003
Posts: 826
Likes: 52
From: Chicopee MA
whar components are different between 350hp and 405hp
I teach high school automotive at a local high school and was wondering what changes there are between the two engines. I am assuming that the pistons are do to the increase in compression. I think also the cam is different.What else did they do to increase the horsepower and keep the cubic inches the same.Just bought a new 2003 convert three weeks ago and am loving life. :D
Melting Slicks
Joined: Oct 2002
Posts: 2,855
Likes: 0
Re: whar components are different between 350hp and 405hp (don7790)
Ls6 heads have superior flow and combustion chamber design, they also create about another 1/2 point of CR--cam is diff--the titanium exhaust may help as well--your 2003 has the same intake manifold--
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
Re: whar components are different between 350hp and 405hp (NEPTUNEBILL)
Ls6 heads have superior flow and combustion chamber design, they also create about another 1/2 point of CR--cam is diff--the titanium exhaust may help as well--your 2003 has the same intake manifold--
The LS6 heads also have lighter hollow stem valves, and stiffer valve springs.
Safety Car
Joined: Jun 2003
Posts: 4,469
Likes: 20
From: Rockville Centre NY
Re: whar components are different between 350hp and 405hp (Mitch C)
Exhaust manifold's are also different for LS6. You can get there on an LS1 by replacing intake, exhaust, long tube headers and cam.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: whar components are different between 350hp and 405hp (c5grandsport)
since the poster mentioned the "350" hp; then the differences between the two are:
*heads
*cam
*no pre-cats
*no screen in MAF
*different air filter cover
As far as I rememeber, that's the only engine differences from a late year 2001 LS1 and the 405hp Z06.
.
[Modified by Mike Mercury, 11:40 AM 11/3/2003]
*heads
*cam
*no pre-cats
*no screen in MAF
*different air filter cover
As far as I rememeber, that's the only engine differences from a late year 2001 LS1 and the 405hp Z06.
.
[Modified by Mike Mercury, 11:40 AM 11/3/2003]
Burning Brakes
Joined: Sep 2002
Posts: 1,077
Likes: 1
From: Greenville SC
Re: whar components are different between 350hp and 405hp (don7790)
The best write up I have ever seen is here.
http://www.z06registry.com/01.php for 01 changes.
and http://www.z06registry.com/02.php covers 01-02 changes.
:cheers:
http://www.z06registry.com/01.php for 01 changes.
and http://www.z06registry.com/02.php covers 01-02 changes.
:cheers:
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Melting Slicks
Joined: Mar 2001
Posts: 2,372
Likes: 51
From: New Milford CT
Re: whar components are different between 350hp and 405hp (Mike Mercury)
"Exhaust manifold's are also different for LS6"
Whoops! This is not correct! Exhaust manifolds are the same part number for LS1 and LS6, for years 2001 and up.
Whoops! This is not correct! Exhaust manifolds are the same part number for LS1 and LS6, for years 2001 and up.
Pro
Joined: Sep 2003
Posts: 731
Likes: 0
From: Calgary Alberta
Re: whar components are different between 350hp and 405hp (don7790)
The LS6 heads have a smaller combustion chamber than the LS1 which provides the higher compression ratio. However the chambers are ported to provide better flow. The LS6 also has a different cam profile, lighter springs and lighter valvetrain. There is also a thin wall cast iron manifold in the LS6 versus a stamped steel manifold in the LS1.
The November 2002 issue of Corvette Magazine has a fairly thorough breakdown between the two engines.The article is titled bred to the bone.
The November 2002 issue of Corvette Magazine has a fairly thorough breakdown between the two engines.The article is titled bred to the bone.
Burning Brakes
Joined: Jun 2000
Posts: 1,122
Likes: 0
From: Annapolis, MD USA
Re: whar components are different between 350hp and 405hp (jfpilla)
His cars an 03, the intakes the same. In addition to above, the MAF is descreened on the Z06.
Melting Slicks
Joined: Mar 2001
Posts: 2,372
Likes: 51
From: New Milford CT
Re: whar components are different between 350hp and 405hp (c5grandsport)
"Exhaust manifolds are different on the LS6"
Hightest and c5grandsport, Per Ken Fichtner's Chevrolet Parts Manager (supporting vendor), and straight out of the GM Corvette parts manual, the 2001 and up LS1 and 2001 and up LS6 cast iron exhaust manifolds, RH P/N 12561256 and LH P/N 12561255 are the SAME FOR BOTH ENGINES.
Where you are both getting confused is that the 2000 and DOWN LS1 engines used a different exhaust manifold.
Sorry guys but I just can't let a gross error like this stand on such a great forum.
;)
Hightest and c5grandsport, Per Ken Fichtner's Chevrolet Parts Manager (supporting vendor), and straight out of the GM Corvette parts manual, the 2001 and up LS1 and 2001 and up LS6 cast iron exhaust manifolds, RH P/N 12561256 and LH P/N 12561255 are the SAME FOR BOTH ENGINES.
Where you are both getting confused is that the 2000 and DOWN LS1 engines used a different exhaust manifold.
Sorry guys but I just can't let a gross error like this stand on such a great forum.
;)
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: whar components are different between 350hp and 405hp (CJS)
the 2001 and up LS1 and 2001 and up LS6 cast iron exhaust manifolds, RH P/N 12561256 and LH P/N 12561255 are the SAME FOR BOTH ENGINES.
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 1
From: Winston Salem NC
Re: whar components are different between 350hp and 405hp (Mike Mercury)
Where you are both getting confused is that the 2000 and DOWN LS1 engines used a different exhaust manifold.
:iagree:
I still think there are some who think LS1 And LS6 are always different. From 2001 and newer. LS1 and LS6 have mostly the same engine parts. :iagree:
:iagree:
I still think there are some who think LS1 And LS6 are always different. From 2001 and newer. LS1 and LS6 have mostly the same engine parts. :iagree:
Burning Brakes
Joined: Jun 2000
Posts: 1,122
Likes: 0
From: Annapolis, MD USA
Re: whar components are different between 350hp and 405hp (rbeckham)
His cars an 03, the intakes the same. In addition to above, the MAF is descreened on the Z06. When I prepared my 2000 FRC (LS1) for SCCA T1 competition, I swapped out my heads, intake, injectors, and cam from Dave Farmer's LS6 crate engine, keeping my LS1 bottom end. I did not modify my MAF. Can anyone give me a short answer as to whether removing the screen would likely help me by any significant amount? Or would this give me problems with my PCU? Thanks, Robert
