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#1
11-25-2013, 09:45 PM
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Solid Roller Valve Spring help
I have a comp custom solid roller in a 455 short block. Here are the cam specs
lobes 4874B / 4875B 242/248 .381 .385 112 The heads going on the motor need solid roller springs, I would like to set them up for 1.65 or even 1.72 high ratio rockers. Currently i have 1.5's to go on them. #16 iron heads ferrera 5000 series valve intake F5066 ....5.213" exhaust F5063 ..5.230" chromoly locks and retainers comp cams 1.5 ratio Pro Magnum roller rockers with the above locks and valves the spring set up at 1.750" I can get the seats cut .100" to bring me to 1.850" anyone able to recommend a solid roller spring for mostly street and some strip use? Thanks in advance for your help Rich
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68 Firebird 400, #16, xe274, street dominator, 850 DP, hooker headers, t400, 3500 stall, 3.73, 295/65 bfg drag radicals... best 13.27 @ 102.8, 1.90 60ft |
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#2
11-25-2013, 10:59 PM
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I believe those are a cast variety - if so you would need to be replaced with a higher grade aluminum/stainless steel. Also 10 degree locks/retainers should be used
rather than 7.5's if so equipped. Butler offers a spring that will work well (10 years go anyway) that with an offset retainer would give you a 1.800" ih.
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1994 Formula 535ci NA CV-1 - single 1050 with c14 - 940hp@7000/825tq@5200 Pontiac Powered 4th Gen Project Progress 
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#3
11-26-2013, 12:58 AM
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cant edit my post
the rockers are prw stainless 1.52's sorry my bad Rich
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68 Firebird 400, #16, xe274, street dominator, 850 DP, hooker headers, t400, 3500 stall, 3.73, 295/65 bfg drag radicals... best 13.27 @ 102.8, 1.90 60ft |
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#4
11-26-2013, 01:52 PM
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Up to .600 lift or slightly higher.
Comp Cams........... 987-16 |
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#5
11-26-2013, 11:13 PM
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Quote:
Manley and PAC springs are noted for longevity.... I'd look at their stuff myself. Dont have a catalog handy at the moment tho. |
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#6
12-09-2013, 03:46 PM
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Wow those 987 are a really light spring #138 on the seat is what I saw. Am I missing something?
Rich
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68 Firebird 400, #16, xe274, street dominator, 850 DP, hooker headers, t400, 3500 stall, 3.73, 295/65 bfg drag radicals... best 13.27 @ 102.8, 1.90 60ft Last edited by 68blackbird; 12-09-2013 at 03:56 PM. |
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#7
12-09-2013, 03:54 PM
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You wont be able to use those valves with solid roller spring pressures, Ferrea told me 160 max on the seat for the 5000 series.
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74  2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#8
12-09-2013, 08:05 PM
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Darby
What springs, valves, retainers are you running. What IH are the springs and what seat pressure? Rich
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68 Firebird 400, #16, xe274, street dominator, 850 DP, hooker headers, t400, 3500 stall, 3.73, 295/65 bfg drag radicals... best 13.27 @ 102.8, 1.90 60ft |
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#9
12-09-2013, 08:23 PM
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Rich
i'm running the crane 99893 springs with titanium retainers. IH 1.76 PROBABLY 145-150 seat pressures. ferrea 5000 series valves
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#10
12-09-2013, 11:55 PM
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Darby
just read through this thread you started. I know its apples to oranges with the Hyd Roller vs SR. http://forums.maxperformanceinc.com/...=698018&page=2 Steve C alludes to David Vizard running a big block Chevy 242 - 248 solid roller with beehive valve springs with 150 psi on the seat. I guess wading through all the chatter. Do I need more then 160 lbs maybe 400 to 450 open if i'm just looking at revving this motor to 6000 Keep the valves, put good springs with light retainers and thick wall pushrods? Rich
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68 Firebird 400, #16, xe274, street dominator, 850 DP, hooker headers, t400, 3500 stall, 3.73, 295/65 bfg drag radicals... best 13.27 @ 102.8, 1.90 60ft |
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#11
12-12-2013, 02:07 AM
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Spoke with Comp Cams today. They recommended a 914 spring IH 1.8 yielding 160lbs seat pressure. Using a 1.5 rocker.
Rich
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68 Firebird 400, #16, xe274, street dominator, 850 DP, hooker headers, t400, 3500 stall, 3.73, 295/65 bfg drag radicals... best 13.27 @ 102.8, 1.90 60ft |
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