Heads...pushrods Question
Thread Starter
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
Heads...pushrods Question
I was hoping someone here would be able to help me out...
I have a COMP CAM: 232/236, 575/578, 113+2 LSA and I am looking at buying these heads:
http://forums.corvetteforum.com/show...977&forum_id=1
Livernois Motorsports CNC Ported LS2/LS6 Cylinder Heads
-New GM LS2/LS6 243 casting
-5 axis CNC machined
-Fully Assembled
-New valves
-New valve springs good to ~ .580 lift
-Flow over 300 cfm on std 3.900 bore
-No core required
-The valves are stock LS6 valves which are 2.000" Intake and 1.550" Exhaust.
(I am upgrading the springs to a set of COMP 918s)
I was wondering if there was a formula that would tell me what pushrods would be the best for my applications? I am looking at some of these:
http://www.thunderracing.com/catalog...vid=7&pcid=106
Thanks in advance,
Micah
I have a COMP CAM: 232/236, 575/578, 113+2 LSA and I am looking at buying these heads:
http://forums.corvetteforum.com/show...977&forum_id=1
Livernois Motorsports CNC Ported LS2/LS6 Cylinder Heads
-New GM LS2/LS6 243 casting
-5 axis CNC machined
-Fully Assembled
-New valves
-New valve springs good to ~ .580 lift
-Flow over 300 cfm on std 3.900 bore
-No core required
-The valves are stock LS6 valves which are 2.000" Intake and 1.550" Exhaust.
(I am upgrading the springs to a set of COMP 918s)
I was wondering if there was a formula that would tell me what pushrods would be the best for my applications? I am looking at some of these:
http://www.thunderracing.com/catalog...vid=7&pcid=106
Thanks in advance,
Micah
Le Mans Master
Joined: Sep 2003
Posts: 6,276
Likes: 227
From: Farmington CT
Cruise-In VII Veteran
as long as the 243 heads aren't milled and ls6 valves are used the 7.4's should be standard deal, the stock z06 pushrods were a different length for the different base circle stock ls6 cam(which are often used w/ aftermarket cams)
i used the TR 7.4's on a recent camaro project, i believe they are comp p/r's w/ their name on them
i used the TR 7.4's on a recent camaro project, i believe they are comp p/r's w/ their name on them
Thread Starter
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
Originally Posted by connecticut
as long as the 243 heads aren't milled and ls6 valves are used the 7.4's should be standard deal, the stock z06 pushrods were a different length for the different base circle stock ls6 cam(which are often used w/ aftermarket cams)
i used the TR 7.4's on a recent camaro project, i believe they are comp p/r's w/ their name on them
i used the TR 7.4's on a recent camaro project, i believe they are comp p/r's w/ their name on them
http://forums.corvetteforum.com/show...977&forum_id=1
Thread Starter
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
Originally Posted by connecticut
how much gain over standard 243 heads do this produce? give a call to LM in the morning to verify correct p/r length
and they told me that I needed to first install the cam I have and then do the length check, I think I will probably just go with the stock length since they are not milled, but I am calling to confirm that they are in fact not milled tomorrow! With the better flow rate over stock LS1 heads, I expect a nice little gain with the cam I have. 
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I would take their advice and get an adjustable pushrod. That is one place you don't want to screw up. I am setting up my order right now for the same thing, adjustable pushrod, lifters and studs, except I got the Dart 205's.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Originally Posted by connecticut
the stock z06 pushrods were a different length for the different base circle stock ls6 cam
