918 spring compressed coil gap?
#2
TECH Senior Member
Outside Diameter (O.D.): 1.290"/1.060"
Inside Diameter (I.D.): .885"/.656"
Installed Pressure: 130 lbs @ 1.800"
Open Pressure: 318 lbs @ 1.200''
Coil Bind: 1.085"
Maximum Lift: 0.625"
Rate (lbs/in): 313 lbs/in
Inside Diameter (I.D.): .885"/.656"
Installed Pressure: 130 lbs @ 1.800"
Open Pressure: 318 lbs @ 1.200''
Coil Bind: 1.085"
Maximum Lift: 0.625"
Rate (lbs/in): 313 lbs/in
#3
Originally Posted by PREDATOR-Z
Outside Diameter (O.D.): 1.290"/1.060"
Inside Diameter (I.D.): .885"/.656"
Installed Pressure: 130 lbs @ 1.800"
Open Pressure: 318 lbs @ 1.200''
Coil Bind: 1.085"
Maximum Lift: 0.625"
Rate (lbs/in): 313 lbs/in
Inside Diameter (I.D.): .885"/.656"
Installed Pressure: 130 lbs @ 1.800"
Open Pressure: 318 lbs @ 1.200''
Coil Bind: 1.085"
Maximum Lift: 0.625"
Rate (lbs/in): 313 lbs/in
#7
TECH Senior Member
iTrader: (4)
Originally Posted by mvvette97
why do the bottom coils compress first?
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#8
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iTrader: (4)
Originally Posted by mvvette97
why do the bottom coils compress first?
#9
Originally Posted by vettenuts
Upper coils are stiffer, lower coils collapse on top of each other taking out their effective mass for acceleration of the open valve. I wouldn't worry about it. As stated, check installed height, clearance to seal and amount of distance to coil bind. I think your original problems was the retainers or the springs and I wouldn't trust the Ebay vendor you got them from.
#10
TECH Senior Member
you dont measure a conical spring like that, the coils are the top are weaker than the bottom coils
just adding... its the other way around, top coils compress first. beehive or conical springs are known as variable rate springs because the smaller diameter coils (top) compress first, then gradually as the installed height decreases, the bottom coils start to compress adding more pressure
It is actually the opposite
#12
TECH Senior Member