GM LS Complete Cylinder Head Valve Spring Kit NEW! PACPAC-KS23 A complete kit designed exclusively for high-performance GM LS engines that includes all of the necessary components to revitalize the valve springs for smooth, consistent high RPM operation. Kit includes (16) PACPAC-1204X double valve springs, (16) chrome moly retainers, (16) valve seals, (16) valve spring seats, and (16 pair) valve locks. PACPAC-1204X Valve Spring Specifications Outer OD Outer ID Middle OD Inner ID Installed Height Open Load Spring Rate Coil Bind Max. Lift
1200 Series 1.290"
.950"
— .694" 145 @ 1.800" 385 @ 1.150"
369 1.000" .700"
RPM Series Crate Motor “Cheater” Valve Springs 'HVLJQHGVSHFL¿FDOO\IRUSRSXODU*0³´DQG ³´FUDWHPRWRUV530VHULHVYDOYHVSULQJVSHUPLW increased engine RPM's compared to stock GM crate motor springs. Sold in sets of 16.
Valve Locks Choose from 7°, 8°, or 10° valve locks for 11/32", 3/8", or 8mm valves. Sold in sets of 16.
Valve Stem Size 11/32" 11/32" 11/32" 11/32" 11/32" 11/32" 11/32" 11/32" 11/32" 3/8"
Lock Angle
Groove Type
Installed Height
Part No.
Material Titanium
PACPAC-L8005 PACPAC-L8025 PACPAC-L8028 PACPAC-L8036 PACPAC-L8038 PACPAC-L8092 PACPAC-L8131** PACPAC-L8132** PACPAC-L8133** PACPAC-L8134** PACPAC-L8142** PACPAC-L8143** PACPAC-L8146 PACPAC-L8154 PACPAC-L8160
10° 10° 10°
Square
Std.
Square +.050" Steel Square +.050" Steel
Installed Height
Open Load
Spring Rate
Coil Bind
Max Lift
8° 8° 8° 8° 8° 8°
Square
Std.
Steel
Part No.
Description O.D.
I.D.
PACPAC-1210X “602” Spring 1.245" .891" 87 @ 1.700" 212 @ 1.270" 291 1.128" .450" PACPAC-1212X “604” Spring 1.355" .910" 125 @ 1.750" 315 @ 1.250" 380 1.180" .550"
Square +.050" Steel
10°
Square Radius
Std. Std.
Steel Steel
Radius +.050" Steel
Square
Std.
Steel
Valve Spring Retainers Offered in 600 series Pacaloy tool steel or lightweight 500 series Ti-17 titanium.
Square +.050" Steel Radius +.050" Steel Radius -.050" Steel
8mm 8° 8mm 8°
D C B A
11/32" 11/32"
7° 7°
Square Radius Radius Square Radius
Std. Std. Std. Std. Std.
Steel Steel Steel Steel Steel
Dimensions
Lock Angle
Gram Weight
8mm 10°
Part No.
A
B
C
D
300 Series Chrome Moly Steel PACPAC-R317
PACPAC-LR8025† 11/32" PACPAC-LR8027† 11/32" PACPAC-LR8028† 11/32"
10° 10° 10°
Square -.050" Steel
1.325" .990" 1.300" .940" 1.360" .985" 1.200" .775"
.700" N/A 10° 26.3 .680" N/A LS7 17.0 .690" N/A Mini 8° 17.0 N/A N/A 8° 20.0
PACPAC-R335 PACPAC-R348 PACPAC-R349 PACPAC-R387
** Mini-8 Lock Type †Locks are recessed for use with lash caps. Chrome Moly Spring Seats
A B C
1.450" 1.122" .735" N/A 10° 29.0
400 Series Ti-64 Titanium PACPAC-R436 500 Series Ti-17 Titanium PACPAC-R505
1.450" 1.125" .800" N/A 10° 11.5
Dimensions
1.400" 1.090" .780" N/A 10° 14.8 1.475" 1.140" .735" N/A 10° 14.8
Part No.
Thickness
A
B
C
PACPAC-S102 PACPAC-S103 PACPAC-S106 PACPAC-S110 PACPAC-S114 PACPAC-S117 PACPAC-S126 PACPAC-S138
.060" .060" .060" .060" .060" .060" .060" .060"
1.550" 1.550" 1.550" 1.500" 1.450" 1.550" 1.500" 1.270"
.855" .770" .700" .715" .700" .730" .715" .615"
.635" .575" .635" .570" .570" .575" .630"
PACPAC-R514 PACPAC-R517 PACPAC-R540
1.325" .990"
.700" N/A 10° 11.8
1.400" 1.080" .770" N/A 8° 13.6
600 Series Pacaloy Tool Steel PACPAC-R614
1.450" 1.140" .735" N/A 10° 15.9
PACPAC-R632
1.250" .890"
.600" N/A Mini 8° N/A
N/A
Valve Spring Shims NEW! Offered in chrome moly steel, Pa- caloy tool steel, Ti-64 titanium or Ti-17 titanium. Sold in sets of 16. Part No. O.D. I.D.
Spring Installed Height Gauge PACPAC-T902 Measure valve spring heights quickly, accurate- ly, and effectively. Standard model is made from GXUDEOHVWDLQOHVVVWHHODQGLQFOXGHV¿QHWKUHDGV for increased accuracy. Measures 1.800"- 2.600" installed heights.
Thickness
PACPAC-S184 PACPAC-S188 PACPAC-S189
1.500" 1.250" 1.250"
.570" .570" .570"
.050" .050" .030"
Valve Spring Shim Kit NEW! PACPAC-KS93 Used to achieve the desired valve spring installed height and seat pres- sure, comprehensive kit includes (64) 1.250" O.D. x .570" I.D. valve spring shims, 16 pieces each in thicknesses of .015", .020", .030" and .050".
KATIE HETTINGER
590
CIRCLE TRACK 2021-22
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