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bridged rockers to stud |
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matty 401 
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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 Posted: Jan/17/2019 at 9:07am |
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i have seen that it is interesting
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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Red Devil
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Joined: Jul/10/2007 Location: Canada Status: Offline Points: 1743 |
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Posted: Jan/17/2019 at 10:09am |
Lift isn't usually the concern - max open spring pressure is typically the limit. For Scorpion, instructions recommended max 0.650" lift and 420 lbs. open, i.e. fine for most hydraulics or street solids. Solid rollers best to use stud-mounted rockers. "IMPORTANT: Maximum valve lift is .650". Due to 5/16" dia. attaching screw, maximum open valve spring pressure is 420 lbs. • Scorpion strongly suggests using .080 minimum wall thickness pushrods. The added stiffness will produce power gains and increased valvetrain stability and durability. " Hope this helps,RD.
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Jan/17/2019 at 11:06am |
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i do not plan on going that big on the cam
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Jan/18/2019 at 10:07am |
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anybody on here running the Scorpion rockers ?
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Jan/20/2019 at 9:02am |
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i have found the 1.6 for 373 for a set and the 1.7 at 378 i know the 1.7 will increase the lift on the cam verses the 1.6 how much room before you kiss a valve ? lift wise
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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Boris Badanov
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Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4210 |
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Posted: Jan/20/2019 at 11:28am |
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That depends on the piston cam timing and lift.
You NEED to check it. A soft spring in a partial assembly and a dial indicator can be used. |
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Gremlin Dreams
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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Jan/20/2019 at 11:36am |
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The LS conversion works well and is capable of very high lift. There is a #750 spring pressure limit on them which covers the majority of builds. It takes some modifications to use them but they work well.
Using 1.7 rockers, stock cam and valve springs I would watch out for coil bind or retainer to guide boss clearance more than piston to valve clearance. Also, the stock spring pressure may not be able to control the faster opening rate with the 1.7 rockers
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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jcisworthy
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Posted: Jan/20/2019 at 11:47am |
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LS rockers on iron heads
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Jan/20/2019 at 1:04pm |
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what cams are you running with the LS rocker set up
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Jan/20/2019 at 1:49pm |
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Mostly hydraulic flat tappet and a few solid flat tappet
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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matty 401 wrote: