What length pushrods do I need? (LS1)
Thread Starter
Registered User
Joined: Nov 2000
Posts: 76
From: Chicago, IL, USA
What length pushrods do I need? (LS1)
Here is all necessary information (I think), I need to know what length of pushrod to order.
My heads have had the valves sunk .015" in the seat to aid in P to V clearance, and my valves are .070" longer than stock. Heads are milled <.005" (Clean up only)
By my figuring, my valves will be ~.080 taller than stock as assembled. (.015" + .070" - .005" = .080") Do I need longer or shorter pushrods than stock (7.400"), and why?
The rest of my valvetrain is as follows:
Comp "R" lifters
Yella Terra 1.7s
Comp 977 springs
--------------------
2002 M6 Z28: Absolute Speed Stg 2.5 5.3l heads, G5X3, YTs, Comp "R"s, Hooker LTs, 3" duals w/ x-pipe, pulleys, full boltons, full suspension, Wolfe rollbar, Spec S3, Moser 12 bolt w/ 4.30s, and so on, and so on, and so on.....
2002 GMC Z71, 5.3, no mods....ever....I'm serious....
My heads have had the valves sunk .015" in the seat to aid in P to V clearance, and my valves are .070" longer than stock. Heads are milled <.005" (Clean up only)
By my figuring, my valves will be ~.080 taller than stock as assembled. (.015" + .070" - .005" = .080") Do I need longer or shorter pushrods than stock (7.400"), and why?
The rest of my valvetrain is as follows:
Comp "R" lifters
Yella Terra 1.7s
Comp 977 springs
--------------------
2002 M6 Z28: Absolute Speed Stg 2.5 5.3l heads, G5X3, YTs, Comp "R"s, Hooker LTs, 3" duals w/ x-pipe, pulleys, full boltons, full suspension, Wolfe rollbar, Spec S3, Moser 12 bolt w/ 4.30s, and so on, and so on, and so on.....
2002 GMC Z71, 5.3, no mods....ever....I'm serious....
Advanced Tech Moderator
Joined: Aug 2001
Posts: 2,262
From: Nashville
What Joe said is correct. Referce also-
http://web.camaross.com/forums/showt...hreadid=159699
Moving to LS1 Tech. Thanks.
http://web.camaross.com/forums/showt...hreadid=159699
Moving to LS1 Tech. Thanks.
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