Ok, i give up 5.3L heads Vs LS6 Heads
03-16-2008, 11:38 PM
#21
Racer
Member Since: Aug 2006
Location: Sioux Falls SD
Posts: 355
Likes: 0
Received 0 Likes
on
0 Posts
I would like to know what cam gets the car to 450rwhp and drives well on the street? I am at 417rwhp with .222 and .566 cam specs. Differential is DTE 410 with many bolt ons. I have been to two different tuners. The car had idle issues after installing the fast 90/90 set up. Runs fine now but I am afraid to change out to larger cam.
thanks
thanks
03-17-2008, 07:45 AM
#23
Le Mans Master
03-17-2008, 08:56 AM
#24
Race Director
03-17-2008, 09:11 AM
#25
Team Owner
Member Since: Sep 2003
Location: Raleigh / Rolesville NC
Posts: 43,084
Likes: 0
Received 25 Likes
on
25 Posts
IIRC the 5.3 was designed to keep cost down.
the 5.3 has smaller runners 200 vs 205, 215, 225 runners.
2.04" Intake Valves
1.55" Exhaust Valves
the air flow is higher. Now this said, this type of head MAY be better for low end torque and off the line, vs high end HP
Keeping the cam smaller, 224/224 mid lift may be the benefit
If your looking for big HP numbers then these heads may not be for you.
But quick off the line . . .
the 5.3 has smaller runners 200 vs 205, 215, 225 runners.
2.04" Intake Valves
1.55" Exhaust Valves
the air flow is higher. Now this said, this type of head MAY be better for low end torque and off the line, vs high end HP
Keeping the cam smaller, 224/224 mid lift may be the benefit
If your looking for big HP numbers then these heads may not be for you.
But quick off the line . . .
03-17-2008, 10:39 AM
#26
First decide what you want to do with the car. Drag or street maybe road race (hpde) or all ocf the above....
Considering you have tiger sharked your z06, I would say you expect it to do a little of everything.
A ms3 cam and 5.3 L heads are at odds with eachother.
A ms3 is a higher duration and lift cam made for heads with larger runners which develop very impressive high end peak hp #'s; however this often comes at a sacrifice on the low end torque and therefore drivability because it has a narrower power band, great for automatics with a specified stall, made to keep the engine in that power band. Obviously manuals can do this too, but your the stall....
The 5.3 heads have a small runner and smaller combustion chamber which is a beautiful combo for great low end torque and "power under the curve". because your using port velocity and compression to your advantage, it allows you to run a smaller cam which negates some of the above mentioned valve clearance issues. This will leadyou to less "peak' but more "under curve" power. I feel like a 2.04 intake is larger than nescessary, but whatever.
Being that you already have a 243 head, you could get cleaned up (or not) and add new springs and run about a 224 to 228 on a 112 w/o problems. Your runners are 215cc which will let you go either way. You can mill them while the springs are going on for negligable cost and that will bump the compression. You can also have them ported out to ~230 cc runner and go with your ms3.
Always check ptv
There's no reason a 224 cam with high lift can't make 450hp on ls6 heads with GOOD headers and ls6 intake with supporting bolt ons.
good luck
Considering you have tiger sharked your z06, I would say you expect it to do a little of everything.
A ms3 cam and 5.3 L heads are at odds with eachother.
A ms3 is a higher duration and lift cam made for heads with larger runners which develop very impressive high end peak hp #'s; however this often comes at a sacrifice on the low end torque and therefore drivability because it has a narrower power band, great for automatics with a specified stall, made to keep the engine in that power band. Obviously manuals can do this too, but your the stall....
The 5.3 heads have a small runner and smaller combustion chamber which is a beautiful combo for great low end torque and "power under the curve". because your using port velocity and compression to your advantage, it allows you to run a smaller cam which negates some of the above mentioned valve clearance issues. This will leadyou to less "peak' but more "under curve" power. I feel like a 2.04 intake is larger than nescessary, but whatever.
Being that you already have a 243 head, you could get cleaned up (or not) and add new springs and run about a 224 to 228 on a 112 w/o problems. Your runners are 215cc which will let you go either way. You can mill them while the springs are going on for negligable cost and that will bump the compression. You can also have them ported out to ~230 cc runner and go with your ms3.
Always check ptv
There's no reason a 224 cam with high lift can't make 450hp on ls6 heads with GOOD headers and ls6 intake with supporting bolt ons.
good luck
Last edited by NASAblue; 03-17-2008 at 10:54 AM.
03-17-2008, 03:45 PM
#28
Instructor
Thread Starter
Member Since: Feb 2008
Location: Rockland NY
Posts: 229
Likes: 0
Received 0 Likes
on
0 Posts
First decide what you want to do with the car. Drag or street maybe road race (hpde) or all ocf the above....
Considering you have tiger sharked your z06, I would say you expect it to do a little of everything.
A ms3 cam and 5.3 L heads are at odds with eachother.
A ms3 is a higher duration and lift cam made for heads with larger runners which develop very impressive high end peak hp #'s; however this often comes at a sacrifice on the low end torque and therefore drivability because it has a narrower power band, great for automatics with a specified stall, made to keep the engine in that power band. Obviously manuals can do this too, but your the stall....
The 5.3 heads have a small runner and smaller combustion chamber which is a beautiful combo for great low end torque and "power under the curve". because your using port velocity and compression to your advantage, it allows you to run a smaller cam which negates some of the above mentioned valve clearance issues. This will leadyou to less "peak' but more "under curve" power. I feel like a 2.04 intake is larger than nescessary, but whatever.
Being that you already have a 243 head, you could get cleaned up (or not) and add new springs and run about a 224 to 228 on a 112 w/o problems. Your runners are 215cc which will let you go either way. You can mill them while the springs are going on for negligable cost and that will bump the compression. You can also have them ported out to ~230 cc runner and go with your ms3.
Always check ptv
There's no reason a 224 cam with high lift can't make 450hp on ls6 heads with GOOD headers and ls6 intake with supporting bolt ons.
good luck
Considering you have tiger sharked your z06, I would say you expect it to do a little of everything.
A ms3 cam and 5.3 L heads are at odds with eachother.
A ms3 is a higher duration and lift cam made for heads with larger runners which develop very impressive high end peak hp #'s; however this often comes at a sacrifice on the low end torque and therefore drivability because it has a narrower power band, great for automatics with a specified stall, made to keep the engine in that power band. Obviously manuals can do this too, but your the stall....
The 5.3 heads have a small runner and smaller combustion chamber which is a beautiful combo for great low end torque and "power under the curve". because your using port velocity and compression to your advantage, it allows you to run a smaller cam which negates some of the above mentioned valve clearance issues. This will leadyou to less "peak' but more "under curve" power. I feel like a 2.04 intake is larger than nescessary, but whatever.
Being that you already have a 243 head, you could get cleaned up (or not) and add new springs and run about a 224 to 228 on a 112 w/o problems. Your runners are 215cc which will let you go either way. You can mill them while the springs are going on for negligable cost and that will bump the compression. You can also have them ported out to ~230 cc runner and go with your ms3.
Always check ptv
There's no reason a 224 cam with high lift can't make 450hp on ls6 heads with GOOD headers and ls6 intake with supporting bolt ons.
good luck
