•• LS3 Cam & Heads - results inside ••
04-25-2009, 06:55 PM
#1
Former Vendor
Thread Starter
•• LS3 Cam & Heads - results inside ••
LS3 with the following;
•• RPM CNC LS3 Heads
....• 368 CFM - Intake
....• 255 CFM - Exhaust
•• RPM Camshaft
....• 230° - 236° Duration @.050
....• 114° + 2° LSA
....• .602 - .604 Lift
•• Dynatech Headers - 1 3/4" OD x 32" long primaries
•• Under drive Pulley
•• Stock Intake & TB
•• RPM CNC LS3 Heads
....• 368 CFM - Intake
....• 255 CFM - Exhaust
•• RPM Camshaft
....• 230° - 236° Duration @.050
....• 114° + 2° LSA
....• .602 - .604 Lift
•• Dynatech Headers - 1 3/4" OD x 32" long primaries
•• Under drive Pulley
•• Stock Intake & TB
04-25-2009, 07:08 PM
#2
Instructor
Member Since: Jul 2008
Posts: 112
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LS3 with the following;
•• RPM CNC LS3 Heads
....• 368 CFM - Intake
....• 255 CFM - Exhaust
•• RPM Camshaft
....• 230° - 236° Duration @.050
....• 114° + 2° LSA
....• .602 - .604 Lift
•• Dynatech Headers - 1 3/4" OD x 32" long primaries
•• Under drive Pulley
•• Stock Intake & TB
•• RPM CNC LS3 Heads
....• 368 CFM - Intake
....• 255 CFM - Exhaust
•• RPM Camshaft
....• 230° - 236° Duration @.050
....• 114° + 2° LSA
....• .602 - .604 Lift
•• Dynatech Headers - 1 3/4" OD x 32" long primaries
•• Under drive Pulley
•• Stock Intake & TB
04-25-2009, 07:25 PM
#4
Le Mans Master
Not too many Z's are equipped with an LS3. Great numbers!
EDIT: Whoops, I didn't see the '04 Z with LS3 caption the first time I looked.
I'd love to see the dyno runs of the same setup with stock LS3 heads. That would be very interesting.
EDIT: Whoops, I didn't see the '04 Z with LS3 caption the first time I looked.
I'd love to see the dyno runs of the same setup with stock LS3 heads. That would be very interesting.
Last edited by old motorhead; 04-25-2009 at 07:32 PM.
04-25-2009, 07:35 PM
#5
Safety Car
Member Since: Feb 2008
Location: TEXOMA
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St. Jude Donor '08-'09
WOW some great TOP END numbers,,
looks a little lacking down low though, im making 350 rwtq @ 3000 rpms, with stock ls2 heads and cam. but i think thats just the nature of the heads and combo of the cam. (big runners)
did you guys have to flycut, ( assume yes) and are u using stock thickness gaskets?
great work!
-carl
looks a little lacking down low though, im making 350 rwtq @ 3000 rpms, with stock ls2 heads and cam. but i think thats just the nature of the heads and combo of the cam. (big runners)
did you guys have to flycut, ( assume yes) and are u using stock thickness gaskets?
great work!
-carl
04-25-2009, 07:59 PM
#6
Tech Contributor
Wow those are IMPRESSIVE results, particularly the nearly 450 tq at 3500!
For comparision, the top line below is a cam only Z06, the bottom line is my cam only LS2.
Charlie your LS3 is better than the 427 LS7! Impressive.
For comparision, the top line below is a cam only Z06, the bottom line is my cam only LS2.
Charlie your LS3 is better than the 427 LS7! Impressive.
04-25-2009, 10:19 PM
#8
Damn! I may just sell my whole topend. My cam is very similar. Were the heads milled? Stock intake and tb too? Wow. Wonder what an LS2 would do with the same set up.
What would those heads run $$$ ?
What would those heads run $$$ ?
04-25-2009, 10:31 PM
#9
WOW some great TOP END numbers,,
looks a little lacking down low though, im making 350 rwtq @ 3000 rpms, with stock ls2 heads and cam. but i think thats just the nature of the heads and combo of the cam. (big runners)
did you guys have to flycut, ( assume yes) and are u using stock thickness gaskets?
great work!
-carl
looks a little lacking down low though, im making 350 rwtq @ 3000 rpms, with stock ls2 heads and cam. but i think thats just the nature of the heads and combo of the cam. (big runners)
did you guys have to flycut, ( assume yes) and are u using stock thickness gaskets?
great work!
-carl
.
04-26-2009, 05:36 AM
#12
Tech Contributor
All with a cam smaller than any other car over 500rwhp.
Raising the bar again and again.
Those heads are insane.
Raising the bar again and again.
Those heads are insane.
04-26-2009, 07:32 AM
#15
Burning Brakes
Member Since: Nov 2008
Location: Gaithersburg MD
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CNC L92 Heads
How about some more info on the heads?
Nothing on the RPM web site!
What compression ratio was used?
What valve/spring/rockers are used?
Costs?
Nothing on the RPM web site!
What compression ratio was used?
What valve/spring/rockers are used?
Costs?
04-26-2009, 11:05 AM
#17
Former Vendor
Thread Starter
We use Manley Next-Tek & Patriot Xtreme Gold Springs and Retainers
Our Ported LS3 heads are between $1650 - $2275, depending on valve selection. This particular set was $2095 and the hardware included:
• new castings
• ss hollow stem intakes
• ss exhaust valves
• springs, retainers,keepers, etc
• CNC ported
• serdi comp valve job
• milled & cc'd
04-26-2009, 11:34 AM
#18
Former Vendor
Thread Starter
Flycutting = .060 intake and exhaust and stock head gaskets
04-26-2009, 11:36 AM
#19
Former Vendor
Thread Starter
