Page 503 - 2017 Racecar Engineering Circle Track Parts and Accessories Catalog

CIRCLE TRACK VALVE SPRINGS
PAC offers three series of dual spring valve spring assemblies for circle track racing applications. Economical, 1200 series are standard HP processed with good
fatigue life. 1300 series Nano Peen springs have surface enhancements and full chamfering for extreme reliability. Premium 1500 series are polished, gold colored
Nano Peen springs engineered for extreme engine speeds and radical camshaft profiles. Sold in sets of 16.
Outer Outer Middle Inner Installed Open Spring Coil Max.
Part No. OD ID OD ID Height Load Rate Bind Lift
1200 Series
PACPAC-1227 1.539" 1.125" Damper .731" 200 @ 1.950" 550 @ 1.250" 500 1.130" .700"
PACPAC-1239 1.550" 1.126" Damper .720" 220 @ 2.050" 625 @ 1.300" 540 1.180" .800"
PACPAC-1243 1.550" 1.136" – .812" 240 @ 1.900" 625 @ 1.200" 550 1.100" .700"
1300 Series
PACPAC-1342 1.574" 1.100" – .826" 250 @ 2.050" 655 @ 1.250" 506 1.200" .800"
PACPAC-1371 1.374" 1.100" – .716" 150 @ 1.950" 455 @ 1.250" 436 1.190" .700"
PACPAC-1385 1.564" 1.150" Damper .744" 250 @ 2.000" 670 @ 1.200" 525 1.140" .800"
PACPAC-1395 1.574" 1.150" Damper .744" 265 @ 2.000" 705 @ 1.200" 550 1.150" .800"
1500 Series
PACPAC-1572 1.510" 1.086" – .774" 180 @ 1.980" 650 @ 1.180" 588 1.110" .800" A
B
C
RPM SERIES CRATE MOTOR CHROME MOLY SPRING SEATS
“CHEATER” VALVE SPRINGS Dimensions
Designed specifically for popular GM “602” and “604” crate mo- Part No. Thickness A B C
tors, RPM Series valve springs offer increased engine RPM's when PACPAC-S103 .060" 1.550" .770" .575"
compared to stock GM crate motor springs. Sold in sets of 16. PACPAC-S104 .060" 1.550" .770" .635"
Installed Open Spring Coil Max PACPAC-S110 .060" 1.500" .715" .570"
Part No. Description O.D. I.D. Height Load Rate Bind Lift PACPAC-S126 .060" 1.500" .715" .630"
PACPAC-1210X “602” Spring 1.245" .891" 87 @ 1.700" 212 @ 1.270" 291 1.128" .450" A
PACPAC-1212X “604” Spring 1.355" .910" 125 @ 1.750" 315 @ 1.250" 380 1.180" .550" B C

VALVE SPRING RETAINERS CHROME MOLY SPRING CUPS
Choose from rigid, 600 Series Pacaloy tool steel D Dimensions
or 500 Series Ti-17 titanium. Sold in sets of 16. C B A Part No. Thickness A B C
Dimensions Lock Gram PACPAC-C202 .060" 1.625" 1.525" .640"
Part No. A B C D Angle Weight PACPAC-C204 .060" 1.670" 1.575" .640"
600 Series Pacaloy Tool Steel
PACPAC-R614 1.450" 1.140" .735" N/A 10° 15.9
500 Series Ti-17 Titanium SPRING INSTALLED
PACPAC-R505 1.400" 1.090" .780" N/A 10° 14.8
PACPAC-R514 1.475" 1.140" .735" N/A 10° 14.8 HEIGHT GAUGE PACPAC-T902
PACPAC-R517 1.325" .990" .700" N/A 10° 11.8 Measure valve spring heights quickly, accurately and
PACPAC-R540 1.400" 1.080" .770" N/A 8° 13.6 effectively. Standard model is made from durable, stainless
TITANIUM VALVE LOCKS PACPAC-L8005 steel and includes fine threads for increased accuracy.
Measures 1.800"-2.600" installed heights.
Lightweight, 10° titanium valve locks are designed for use with
11/32" valves that use traditional, square keeper grooves. Locks
provide a standard installed height. Set of 16 pair.

2-1/2" COIL-OVER SPRINGS
PAC Racing Springs demands the highest technology and best performance, while working diligently, ensuring that the designs, materials and processing with-
stand all performance requirements.
Rate 10" Tall 12" Tall 14" Tall Rate 10" Tall 12" Tall 14" Tall
80 – PACPAC-12X2.5X80 PACPAC-14X2.5X80 375 PACPAC-10X2.5X375 PACPAC-12X2.5X375 PACPAC-14X2.5X375
90 – PACPAC-12X2.5X90 PACPAC-14X2.5X90 400 PACPAC-10X2.5X400 PACPAC-12X2.5X400 PACPAC-14X2.5X400
100 – PACPAC-12X2.5X100 PACPAC-14X2.5X100 425 PACPAC-10X2.5X425 PACPAC-12X2.5X425 PACPAC-14X2.5X425
110 – PACPAC-12X2.5X110 PACPAC-14X2.5X110 450 PACPAC-10X2.5X450 PACPAC-12X2.5X450 PACPAC-14X2.5X450
120 – PACPAC-12X2.5X120 PACPAC-14X2.5X120 475 – PACPAC-12X2.5X475 PACPAC-14X2.5X475
125 PACPAC-10X2.5X125 PACPAC-12X2.5X125 PACPAC-14X2.5X125 500 PACPAC-10X2.5X500 PACPAC-12X2.5X500 PACPAC-14X2.5X500
130 – PACPAC-12X2.5X130 PACPAC-14X2.5X130 525 – PACPAC-12X2.5X525 PACPAC-14X2.5X525
140 – PACPAC-12X2.5X140 PACPAC-14X2.5X140 550 PACPAC-10X2.5X550 PACPAC-12X2.5X550 PACPAC-14X2.5X550
150 PACPAC-10X2.5X150 PACPAC-12X2.5X150 PACPAC-14X2.5X150 575 – PACPAC-12X2.5X575 PACPAC-14X2.5X575
165 – PACPAC-12X2.5X165 PACPAC-14X2.5X165 600 PACPAC-10X2.5X600 PACPAC-12X2.5X600 PACPAC-14X2.5X600
175 PACPAC-10X2.5X175 PACPAC-12X2.5X175 PACPAC-14X2.5X175 625 – PACPAC-12X2.5X625 PACPAC-14X2.5X625
185 – PACPAC-12X2.5X185 PACPAC-14X2.5X185 650 PACPAC-10X2.5X650 PACPAC-12X2.5X650 PACPAC-14X2.5X650
200 PACPAC-10X2.5X200 PACPAC-12X2.5X200 PACPAC-14X2.5X200 675 – PACPAC-12X2.5X675 PACPAC-14X2.5X675
225 PACPAC-10X2.5X225 PACPAC-12X2.5X225 PACPAC-14X2.5X225 700 PACPAC-10X2.5X700 PACPAC-12X2.5X700 PACPAC-14X2.5X700
250 PACPAC-10X2.5X250 PACPAC-12X2.5X250 PACPAC-14X2.5X250 750 PACPAC-10X2.5X750 PACPAC-12X2.5X750 PACPAC-14X2.5X750
275 PACPAC-10X2.5X275 PACPAC-12X2.5X275 PACPAC-14X2.5X275 800 PACPAC-10X2.5X800 PACPAC-12X2.5X800 –
300 PACPAC-10X2.5X300 PACPAC-12X2.5X300 PACPAC-14X2.5X300
325 PACPAC-10X2.5X325 PACPAC-12X2.5X325 PACPAC-14X2.5X325
350 PACPAC-10X2.5X350 PACPAC-12X2.5X350 PACPAC-14X2.5X350
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