Page 515 - 2020-2021 Racecar Engineering Drag Racing Parts and Accessories Catalog

2020 DRAG RACING

RPM Series Springs

RPM Series springs include an innovative manufacturing process that delivers increased performance. Suitable for street or strip use, springs are offered in
dual style for GM LS or beehive single designs. Sold in sets of 16.

Dual Springs For GM LS
Outer Outer Inner Installed Open Spring Coil Max.
Part No. O.D. I.D. Damper I.D. Height Load Rate Bind Lift
PACPAC-1207X 1.304" .950" No .680" 155 @ 1.800" 436 @ 1.150" 433 1.000" .700"
Beehive Single Springs
Lg. End Lg. End Sm. End Sm. End Installed Open Spring Coil Max.
Part No. O.D. I.D. O.D. I.D. Height Load Rate Bind Lift
PACPAC-1211X 1.290" .906" 1.034" .650" 130 @ 1.800" 370 @ 1.175" 385 1.100" .625"
PACPAC-1219X 1.207" .885" 1.072" .650" 145 @ 1.800" 358 @ 1.175" 340 1.100" .625"
PACPAC-1220X 1.445" 1.000" 1.095" .650" 160 @ 1.900" 400 @ 1.250" 370 1.210" .650"
PACPAC-1234X* 1.021" .698" - .525" 92 @ 1.575" 218 @ 1.050" 240 .941" .575"
PACPAC-1255X 1.445" .990" 1.186" .731" 175 @ 1.950" 440 @ 1.300" 408 1.220" .700"
*Drop-in valve spring for Ford Coyote 5.0L.

Spring Installed Height Gauge Valve Spring Retainers
PACPAC-T902
Made of durable stainless steel. Standard Model, 1.800"-
2.600" installed heights.
Dimensions Lock Gram
Part No. A B C D Angle Weight
Valve Spring Shims 300 Series Chrome Moly Steel
PACPAC-R310 1.035" .640" N/A N/A 10° 9.9
PACPAC-R311 1.035" .640" N/A N/A 7° 10.3
PACPAC-R333 .875" .640" N/A N/A 7° 6.4
PACPAC-R335 1.300" .940" .680" N/A 7° 17.0
NEW! PACPAC-R346 .800" .495" N/A N/A 7° 5.5
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 Sportsman Series Ti-64 Titanium
PACPAC-R436 1.450" 1.125" .800" N/A 10° 11.5
500 Pro Series Ti-17 Titanium
PACPAC-R501 1.475" 1.185" .865" .635" 10° 16.5
PACPAC-R505 1.400" 1.090" .780" N/A 10° 14.8
PACPAC-R506 1.400" 1.090" .695" N/A 10° 13.6
Required when setting up valve springs to obtain the desired seat load and PACPAC-R508 1.365" 1.040" .715" N/A 10° 12.9
installed height. PACPAC-R552 1.360” .985” .680” — Mini 8° 13.1
PACPAC-R565 1.620" 1.215" .865" .630" 10° 21.5
Part No. Description 600 Series Pacaloy
PACPAC-KS93 Valve Spring Shim Kit, 1.250" O.D., 64 Pc. Assortment PACPAC-R632 1.250" .890" .600" N/A 8° —
PACPAC-S184 Valve Spring Shims, 1.500" O.D. x .050" Thick, 16 Pcs.
Valve Locks
Chrome Moly Spring Seats
Part No. Valve Size Lock Angle Groove Type Install. Height Material
Dimensions PACPAC-L8025 11/32" 10° Square Std. Steel
Part No. Thickness A B C PACPAC-LR8025 † 11/32" 10° Square Std. Steel
PACPAC-S138 .060" 1.270" .615" N/A PACPAC-LR8027 11/32" 10° Square +.050" Steel
PACPAC-S114 .060" 1.450" .700" N/A PACPAC-L8028 11/32” 10° Square +.050” Steel
PACPAC-L8036 11/32” 8° Square Std. Steel
PACPAC-S110 .060" 1.500" .715" .570" PACPAC-L8038 11/32” 8° Square +.050” Steel
PACPAC-S103 .060" 1.550" .770" .575" PACPAC-L8092 3/8” 10° Square Std. Steel
PACPAC-S105 .060" 1.550" .700" .575" PACPAC-L8132 11/32" 8° Radius +.050" Steel
PACPAC-S106 .060" 1.550" .700" N/A PACPAC-L8133 11/32" 8° Square Std. Steel
PACPAC-S117 .060" 1.550" .730" N/A PACPAC-L8134 11/32" 8° Square +.050" Steel
PACPAC-L8146 11/32” 7° Square Std. Steel
PACPAC-L8154 11/32" 7° Radius Std. Steel
PACPAC-L8160 8mm 10° Radius +.050" Steel
†Valve locks include a recess for use with lash caps.

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