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#1
05-21-2026, 10:28 AM
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Valve Spring Recommendation
Have a NOS Crane Solid Roller Cam and needing to buy springs for it. Cam card in attachment.
I will be using a 1.65 rocker so .687-.22 lash=.665 lift. 260/270 duration @ .050 108 LSA I can get a 1.85 installed height with my heads. Was thinking the recommended closed and open pressures look a little light for a solid roller? Is this because of how old the cam is and valve spring tech. has improves so much? Everything I find is at about 200 on the seat and 550 open. Drag race only. 5/16 hollow stem intakes, will buy titanium retainers, shaft rocker system. |
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#2
05-21-2026, 12:26 PM
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Most folks want at least 200 -240 seat.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#3
05-21-2026, 01:22 PM
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I have 250 on the seat and 690-700 open. But its a pretty aggressive solid roller. [email protected] and .450 lobe lift
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#4
05-22-2026, 09:58 AM
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Howards 98644 might work for you. We run a PSI ct1526ml spring with around 220 seat/ 520 open. spinning to 7000 rpm with no issues. There are installed at 2." though.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 3:90 gear. 28" slick. Best so far 9.95@135 mph. 1.39 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exhaust 950 Quickfuel. |
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#5
05-22-2026, 02:38 PM
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A Manley 22440 is a drop in .
It gives 250 on the seat which after breaking in would be 240. It coil binds at 1.050”
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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