921's or PRC Duals??
#1
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921's or PRC Duals??
Which ones??
These will be going with a 640 lift cam @ 228 duration.. (PG TQR Cam).. What's the rate on the PRC Springs?
Comp 921’s: rated for up to .650 lift
O.D: 1.300
I.D: .870 (outer spring)
I.D: .655 (inner spring)
135 LBS @ 1.770
400 LBS @ 1.220
COIL BIND @ 1.040
MAX LIFT .650
PRC Dual Spring Kit: good for up to .660 lift
seat : 140lbs
open: 390lbs
install : 1.800
coil bind: 1.07
1.290 O.D.
max lift : .660
matl : super pure chrome silicone
These will be going with a 640 lift cam @ 228 duration.. (PG TQR Cam).. What's the rate on the PRC Springs?
Comp 921’s: rated for up to .650 lift
O.D: 1.300
I.D: .870 (outer spring)
I.D: .655 (inner spring)
135 LBS @ 1.770
400 LBS @ 1.220
COIL BIND @ 1.040
MAX LIFT .650
PRC Dual Spring Kit: good for up to .660 lift
seat : 140lbs
open: 390lbs
install : 1.800
coil bind: 1.07
1.290 O.D.
max lift : .660
matl : super pure chrome silicone
#6
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^I'm starting to think the PRC's as well... The 921's are good for .650 lift, the PRC's are good for .660 lift.. That'll give me a little bit more room.
The only reason I ask is I don't hear a lot of people SWEARING by them, but on that note I haven't heard ANYTHING about failures with them.
The only reason I ask is I don't hear a lot of people SWEARING by them, but on that note I haven't heard ANYTHING about failures with them.