Page 592 - 2021-22 Auto Performance_Circle Track
P. 592
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 Outer Middle Inner OD ID OD ID
RPM Series Crate Motor “Cheater” Valve Springs
Installed Open Height Load
Spring Rate
Coil Max Bind Lift 1.128" .450" 1.180" .550"
Coil Max. Bind Lift
Valve Locks
Choose from 7°, 8°, or 10° valve locks for 11/32", 3/8", or 8mm valves. Sold in sets of 16.
1200 Series
1.290"
.950"
—
.694"
145 @ 1.800"
385 @ 1.150"
369
1.000"
.700"
increased engine RPM's compared to stock GM crate motor springs. Sold in sets of 16.
Part No.
Valve Stem Size
Lock Groove Angle Type
Installed Height
Material
PACPAC-L8005
11/32"
10°
Square
Std.
Titanium
PACPAC-L8025
11/32"
10°
Square
+.050"
Steel
PACPAC-L8028
11/32"
10°
Square
+.050"
Steel
PACPAC-L8036
11/32"
8°
Square
Std.
Steel
PACPAC-L8038
11/32"
8°
Square
+.050"
Steel
PACPAC-L8092
3/8"
10°
Square
Std.
Steel
PACPAC-L8131**
11/32"
8°
Radius
Std.
Steel
PACPAC-L8132**
11/32"
8°
Radius
+.050"
Steel
PACPAC-L8133**
11/32"
8°
Square
Std.
Steel
PACPAC-L8134**
11/32"
8°
Square
+.050"
Steel
PACPAC-L8142**
8mm
8°
Radius
+.050"
Steel
PACPAC-L8143**
8mm
8°
Radius
-.050"
Steel
PACPAC-L8146
11/32"
7°
Square
Std.
Steel
PACPAC-L8154
11/32"
7°
Radius
Std.
Steel
PACPAC-L8160
8mm
10°
Radius
Std.
Steel
PACPAC-LR8025†
11/32"
10°
Square
-.050"
Steel
PACPAC-LR8027†
11/32"
10°
Square
Std.
Steel
PACPAC-LR8028†
11/32"
10°
Radius
Std.
Steel
Part No.
PACPAC-1210X PACPAC-1212X
Description
“602” Spring “604” Spring
O.D.
1.245" 1.355"
Installed I.D. Height
.891" 87 @ 1.700" .910" 125 @ 1.750"
Open
Load
212 @ 1.270" 315 @ 1.250"
Spring Rate 291 380
Valve Spring Retainers
Offered in 600 series Pacaloy tool steel or lightweight 500 series Ti-17 titanium.
DC
B A
Lock Angle
Part No.
A B
C
D
Dimensions
Gram Weight
300 Series Chrome Moly Steel
PACPAC-R317
1.325"
.990"
.700"
N/A
10°
26.3
PACPAC-R335
1.300"
.940"
.680"
N/A
LS7
17.0
PACPAC-R348
1.360"
.985"
.690"
N/A
Mini 8°
17.0
PACPAC-R349
1.200"
.775"
N/A
N/A
8°
20.0
PACPAC-R387
1.450"
1.122"
.735"
N/A
10°
29.0
400 Series Ti-64 Titanium
PACPAC-R436
1.450"
1.125"
.800"
N/A
10°
11.5
500 Series Ti-17 Titanium
PACPAC-R505
1.400"
1.090"
.780"
N/A
10°
14.8
PACPAC-R514
1.475"
1.140"
.735"
N/A
10°
14.8
PACPAC-R517
1.325"
.990"
.700"
N/A
10°
11.8
PACPAC-R540
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
** Mini-8 Lock Type
†Locks are recessed for use with lash caps.
Chrome Moly Spring Seats
Part No. Thickness A
Spring Installed Height Gauge
PACPAC-T902
A B C
Dimensions
B
C
PACPAC-S102
.060"
1.550"
.855"
.635"
PACPAC-S103
.060"
1.550"
.770"
.575"
PACPAC-S106
.060"
1.550"
.700"
.635"
PACPAC-S110
.060"
1.500"
.715"
.570"
PACPAC-S114
.060"
1.450"
.700"
.570"
PACPAC-S117
.060"
1.550"
.730"
.575"
PACPAC-S126
.060"
1.500"
.715"
.630"
PACPAC-S138
.060"
1.270"
.615"
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.
Measure valve spring heights quickly, accurate- ly, and effectively. Standard model is made from for increased accuracy. Measures 1.800"- 2.600" installed heights.
Part No. O.D.
PACPAC-S188 1.250"
I.D.
.570"
Thickness
.050"
PACPAC-S184
1.500"
.570"
.050"
PACPAC-S189
1.250"
.570"
.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".
590 TRACK
CIRCLE 2021-22
KATIE HETTINGER
