Wedge, Canted/Hemi Heads design
Thread Starter
Racer
Joined: Aug 2003
Posts: 348
Likes: 1
From: Sacramento CA
Wedge, Canted/Hemi Heads design
I'm using Compcams Camquest6 software to try and get an idea of what kind of motor I want to build. The question I have is the two types of heads they have to choose from, Wedge & Canted/Hemi. Switching between the two have dramatic differences in estimated peak hp. I haven't noticed manufactures such as trickflow or afr breaking down the heads like this. What catagory would stock heads fall under? Can aftermarket heads fall under either catagory? What are the pros/cons between the two?
2 valve, wedge, all out porting and mods: 570 fwhp @ 7k
2 valve, hemi/canted, high flow, all out porting/mods: 615 fwhp @ 7k
The rest of the engine is built like this:
LS2 6.0L
224/228, .534/.537, LSA 112+2
intake valve 2.08
exhaust valve 1.60
CR: 11:1
Combustion Chamber 74.59 cc
FAST 90 intake & 90mm TB (1150cfm)
Longtubes w/o cats
2 valve, wedge, all out porting and mods: 570 fwhp @ 7k
2 valve, hemi/canted, high flow, all out porting/mods: 615 fwhp @ 7k
The rest of the engine is built like this:
LS2 6.0L
224/228, .534/.537, LSA 112+2
intake valve 2.08
exhaust valve 1.60
CR: 11:1
Combustion Chamber 74.59 cc
FAST 90 intake & 90mm TB (1150cfm)
Longtubes w/o cats
Pro
Joined: Feb 2004
Posts: 718
Likes: 1
From: barrie ontario
I'm using Compcams Camquest6 software to try and get an idea of what kind of motor I want to build. The question I have is the two types of heads they have to choose from, Wedge & Canted/Hemi. Switching between the two have dramatic differences in estimated peak hp. I haven't noticed manufactures such as trickflow or afr breaking down the heads like this. What catagory would stock heads fall under? Can aftermarket heads fall under either catagory? What are the pros/cons between the two?
2 valve, wedge, all out porting and mods: 570 fwhp @ 7k
2 valve, hemi/canted, high flow, all out porting/mods: 615 fwhp @ 7k
The rest of the engine is built like this:
LS2 6.0L
224/228, .534/.537, LSA 112+2
intake valve 2.08
exhaust valve 1.60
CR: 11:1
Combustion Chamber 74.59 cc
FAST 90 intake & 90mm TB (1150cfm)
Longtubes w/o cats
2 valve, wedge, all out porting and mods: 570 fwhp @ 7k
2 valve, hemi/canted, high flow, all out porting/mods: 615 fwhp @ 7k
The rest of the engine is built like this:
LS2 6.0L
224/228, .534/.537, LSA 112+2
intake valve 2.08
exhaust valve 1.60
CR: 11:1
Combustion Chamber 74.59 cc
FAST 90 intake & 90mm TB (1150cfm)
Longtubes w/o cats
Thread Starter
Racer
Joined: Aug 2003
Posts: 348
Likes: 1
From: Sacramento CA
Le Mans Master
Joined: Oct 2001
Posts: 5,577
Likes: 3
From: Southern Maryland Maryland
I'm using Compcams Camquest6 software to try and get an idea of what kind of motor I want to build. The question I have is the two types of heads they have to choose from, Wedge & Canted/Hemi. Switching between the two have dramatic differences in estimated peak hp. I haven't noticed manufactures such as trickflow or afr breaking down the heads like this. What catagory would stock heads fall under? Can aftermarket heads fall under either catagory? What are the pros/cons between the two?
2 valve, wedge, all out porting and mods: 570 fwhp @ 7k
2 valve, hemi/canted, high flow, all out porting/mods: 615 fwhp @ 7k
The rest of the engine is built like this:
LS2 6.0L
224/228, .534/.537, LSA 112+2
intake valve 2.08
exhaust valve 1.60
CR: 11:1
Combustion Chamber 74.59 cc
FAST 90 intake & 90mm TB (1150cfm)
Longtubes w/o cats
2 valve, wedge, all out porting and mods: 570 fwhp @ 7k
2 valve, hemi/canted, high flow, all out porting/mods: 615 fwhp @ 7k
The rest of the engine is built like this:
LS2 6.0L
224/228, .534/.537, LSA 112+2
intake valve 2.08
exhaust valve 1.60
CR: 11:1
Combustion Chamber 74.59 cc
FAST 90 intake & 90mm TB (1150cfm)
Longtubes w/o cats
What exactly are you trying to do? Are you trying to determine cam specs, bench race or figure out how much a motor will make??
Thread Starter
Racer
Joined: Aug 2003
Posts: 348
Likes: 1
From: Sacramento CA
I'm trying to understand the difference between the two head designs that are listed. I put the rest of the specs on there to illustrate how the two heads affect hp on the same theoretical motor. I realize some things like the combustion chamber cc's are out of whack but I'm unable to change it. The program is just for estimates, however it predicts an extra 45hp with the hemi/canted heads vs the wedge heads. So even if this is unrealistic there must be a defined difference between the two, which is all I want to know.
Moderator
Joined: Jun 2004
Posts: 22,753
Likes: 943
The combustion chamber is the difference, A HEMI head has a spherical chamber (hemispherical) while a wedge head has a chamber shaped kinda like a wedge. Picture a triangle on its side.
Hemi Head
5.7 and 6.1 HEMI Head
Wedge Head
Note how the chamber is shallow at the front and deep at the back, wedge.
LSX heads are wedge's.
Hemi Head
5.7 and 6.1 HEMI Head
Wedge Head
Note how the chamber is shallow at the front and deep at the back, wedge.
LSX heads are wedge's.
Last edited by Millenium Z06; May 13, 2009 at 10:52 PM.
