Valvespring height for EX 230/236 w/ stock heads
01-21-2007, 03:56 PM
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Valvespring height for EX 230/236 w/ stock heads hey guys,
I am doing a cam only setup. My cam of choice is the comp ex 230/236 .510/.520 112 LSA. My valvetrain is pretty worked and ready for this hefty cam. I hcae new comp hardened pushrods, crane gold 1.6 s/a rr's, crane double springs, comp seats, locks, and retainers. I was told to ask around to check with valvespring height for my setup. I have a buddy (schweet97z) who has a bunch of shims for me. Anybody have any clue what i should set the spring height up to????
Thanks for any input.
Joe
I am doing a cam only setup. My cam of choice is the comp ex 230/236 .510/.520 112 LSA. My valvetrain is pretty worked and ready for this hefty cam. I hcae new comp hardened pushrods, crane gold 1.6 s/a rr's, crane double springs, comp seats, locks, and retainers. I was told to ask around to check with valvespring height for my setup. I have a buddy (schweet97z) who has a bunch of shims for me. Anybody have any clue what i should set the spring height up to????
Thanks for any input.
Joe
01-21-2007, 04:20 PM
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You need to find the valve spring part number, so that you can see what they were designed to be installed at. Your stock heads have a 1.78" installed height spring.
01-21-2007, 04:33 PM
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40-99893-16 Crane Dual Coil Valve Springs
Crane's website says:
Outer Diameter 1.460
Inner Diameter 1 1.075
Inner Diameter 2 0.803
Damper NO
Seat Pressure @ Installed Height 130 lbs @ 1.850
Open Pressure and Height 402 lbs @ 1.150
Coil Bind 1.080
Maximum Net Lift w/.060" Clearance 0.710
Average Spring Rate 391 lbs/in
Crane's website says:
Outer Diameter 1.460
Inner Diameter 1 1.075
Inner Diameter 2 0.803
Damper NO
Seat Pressure @ Installed Height 130 lbs @ 1.850
Open Pressure and Height 402 lbs @ 1.150
Coil Bind 1.080
Maximum Net Lift w/.060" Clearance 0.710
Average Spring Rate 391 lbs/in
Last edited by emerica4601; 01-21-2007 at 04:38 PM.
01-21-2007, 04:39 PM
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http://www.cranecams.com/index.php?s...&lvl=3&prt=123
You are probably going to need +.100" long valves to make these springs work. With my 1.46" springs on my LT1 casting heads I needed the longer valves.
You are probably going to need +.100" long valves to make these springs work. With my 1.46" springs on my LT1 casting heads I needed the longer valves.
