Racing Springs
Pac Racing Springs is the world's premier valve spring manufacturer. Top Fuel, Top Alcohol, Top Doorslammers to everyday street performance engines use PAC Racing products to provide unsurpassed performance in all forms of Motorsports. Innovative designs produced by skilled springmakers from the highest quality materials ensure the highest performing springs available.
Drag Race Springs
Part # | Spring Diamters | Spring Loads |
Spring Rate | Max Coil Bind | Max Lift | Comments | ||||
OD Outer |
OD Outer | OD Middle | OD Inner | Installed Height (Valve Closed) |
Open Load (Valve Open) |
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1200 Series features PAC Spring's Standard HP processing without scrificing performance. |
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PAC 1224 | 1.625 |
1.175 |
N/A |
0.851 |
275 @ 2.000 | 810 @ 1.150 |
629 |
1.100 |
0.850 |
Dual Spring - Bracket - High lift |
PAC 1228 | 1.625 |
1.175 |
N/A |
0.851 |
280 @ 2.100 |
847 @ 1.200 |
629 |
0.900 |
0.850 |
Dual Spring - Bracket - High lift - agressive cam and RPM |
PAC 1225 | 1.550 | 1.100 | N/A | 0.788 | 250 @ 2.000 | 765 @ 1.200 | 644 | 1.150 | 0.800 | Small Dia. Dual Spring |
PAC 1226 | 1.550 |
1.100 |
N/A |
0.706 |
275 @ 2.000 |
805 @ 1.200 |
663 |
1.150 |
0.800 |
Small Dia. Dual Spring with Damper |
PAC 1298 |
1.625 |
1.175 |
N/A |
0.769 |
250 @ 2.000 |
648 @ 1.300 |
564 |
1.210 |
0.700 |
Dual Spring with Damper - lower lift |
PAC 1299 |
1.625 |
1.175 |
N/A |
0.769 |
250 @ 2.050 |
673 @1.300 |
564 |
1.210 |
0.750 |
Dual Spring with Damper - lower lift |
PAC 1246 |
1.645 |
1.195 |
0.871 |
0.635 |
250 @ 2.050 |
801 @ 1.250 |
689 |
1.130 |
0.800 |
Triple Spring - Bracket Race |
PAC 1247 |
1.645 |
1.195 |
0.871 |
0.635 |
290 @ 2.070 |
835 @ 1.270 |
682 |
1.130 |
0.800 |
Triple Spring - Bracket Race |
PAC 1248 |
1.645 |
1.195 |
0.871 |
0.635 |
332 @ 2.100 |
950 @ 1.200 |
687 |
1.130 |
0.900 |
Triple Spring - Bracket Race |
PAC 1249 |
1.645 |
1.195 |
0.871 |
0.635 |
385 @ 2.200 |
1074 @ 1.200 |
689 |
1.130 |
1.000 |
Triple Spring - High Lift - Top Fuel |
PAC 1250 |
1.645 |
1.195 |
0.871 |
0.635 |
440 @ 2.200 |
1129 @ 1.200 |
689 |
1.130 |
1.000 |
Triple Spring - High Lift - Top Fuel |
PAC 1258 |
1.645 |
1.195 |
0.871 |
0.635 |
350 @ 2.150 |
1004 @ 1.200 |
688 |
1.130 |
0.950 |
Triple Spring - Bracket Race |
1300 Series are premium processed with Nano-Peenedâ„¢ surfaces for enhanced durability & exotic heat treatment for minimal load loss |
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PAC 1324 |
1.625 |
1.175 |
N/A |
0.851 |
275 @ 2.000 |
810 @ 1.150 |
629 |
1.100 |
0.850 |
Dual Spring - Bracket - High lift |
PAC 1328 |
1.625 |
1.175 |
N/A |
0.851 |
280 @ 2.100 |
847 @ 1.200 |
629 |
1.100 |
0.900 |
Dual Spring - Bracket - High lift |
PAC 1325 |
1.550 |
1.100 |
N/A |
0.788 |
250 @ 2.000 |
765 @ 1.200 |
644 |
1.150 |
0.800 |
Small Dia. Dual Spring |
PAC 1326 | 1.550 |
1.100 |
N/A |
0.706 |
275 @ 2.000 |
805 @ 1.200 |
663 |
1.150 |
0.800 |
Small Dia. Dual Spring with Damper |
PAC 1346 |
1.645 |
1.195 |
0.871 |
0.635 |
250 @ 2.050 |
801 @ 1.250 |
689 |
1.130 |
0.800 |
Triple Spring - Bracket Race |
PAC 1347 |
1.645 |
1.195 |
0.871 |
0.635 |
290 @ 2.070 |
835 @ 1.270 |
682 |
1.130 |
0.800 |
Triple Spring - Bracket Race |
PAC 1348 |
1.645 |
1.195 |
0.871 |
0.635 |
332 @2.100 |
950 @ 1.200 |
687 |
1.130 |
0.900 |
Triple Spring - Bracket Race |
PAC 1358 | 1.645 |
1.195 |
0.871 |
0.635 |
350 @ 2.150 |
1004 @ 1.200 |
688 |
1.130 |
0.950 |
Triple Spring - Bracket race |
PAC 1349 | 1.645 |
1.195 |
0.871 | 0.635 |
385 @ 2.200 |
1074 @ 1.200 |
689 |
1.130 |
1.000 |
Triple Spring - Pro Stock/ Top Fuel |
PAC 1350 | 1.645 |
1.195 |
0.871 | 0.635 |
440 @ 2.200 |
1129 @ 1.200 |
689 |
1.130 |
1.000 |
Triple Spring - Pro Stock/ Top Fuel |
PAC 1351 | 1.667 |
1.195 |
0.871 | 0.635 |
450 @ 2.300 |
1240 @ 1.250 |
752 |
1.160 |
1.050 |
Triple Spring - Pro Stock |
PAC 1352 | 1.681 |
1.195 |
0.871 | 0.635 |
480 @ 2.300 |
1315 @ 1.250 |
795 |
1.190 |
1.050 |
Triple Spring - Pro Stock |
PAC 1353 |
1.695 |
1.195 |
0.871 | 0.635 |
500 @ 2.300 |
1500 @ 1.200 |
900 |
1.140 |
1.100 |
Triple Spring - Pro Stock |
PAC 1362 |
1.725 |
1.225 |
0.871 |
0.635 |
475 @ 2.300 |
1515 @ 1.200 |
945 |
1.134 |
1.100 |
Triple Spring - Pro Stock |
PAC 1363 |
1.725 |
1.225 |
0.871 |
0.635 |
525 @ 2.350 |
1565 @ 1.250 |
945 |
1.134 |
1.200 |
Triple Spring - Pro Stock |
PAC 1364 |
1.681 |
1.195 |
0.871 |
0.635 |
525 @ 2.300 |
1365 @ 1.300 |
840 |
1.100 |
1.100 |
Triple Spring - Pro Stock |
Next generation springs feature all of the material & processing features of the 1300 searies with smaller diamters for minimal weight increased valve train stability & high RPM's |
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PAC 1335 |
1.300 |
0.900 |
N/A |
0.616 |
250 @ 1.800 |
860 @ 1.050 |
813 |
0.985 |
0.800 |
Suit LS Style engines. Lightweight for aggressive valve trains - Very High RPM potential |
PAC 1354 | 1.550 | 1.050 | N/A | 0.726 | 425 @ 2.300 | 1440 @ 1.300 | 1015 | 1.230 | 1.000 | Dual Pro stock Intake Spring |
PAC 1329 |
1.500 |
1.050 |
N/A |
0.726 |
350 @ 2.100 |
1052 @ 1.200 |
780 |
1.130 |
0.900 |
Dual High lift |
PAC 1355 | 1.500 | 1.050 | N/A | 0.726 | 420 @ 2.175 | 1200 @ 1.175 | 780 | 1.130 | 1.000 | Dual Pro Stock Exhaust Spring |
PAC 1356 | 1.500 | 1.050 | N/A | 0.726 | 300 @ 2.100 | 1002 @ 1.200 | 780 | 1.130 | 0.900 | Dual Drag Spring |
PAC 1330 |
1.500 |
1.050 |
N/A |
0.726 |
275 @ 2.050 |
792 @ 1.200 |
780 |
1.130 |
0.850 |
Dual High lift |
PAC 1357 | 1.500 | 1.050 | N/A | 0.726 | 375 @ 2.150 | 1116 @ 1.200 | 780 | 1.130 | 0.950 | Dual High lift |
PAC 1355 |
1.500 |
1.050 |
N/A |
0.726 |
420 @ 2.175 |
1200 @ 1.175 |
780 |
1.130 |
1.000 |
Dual High lift - works well in TA/FC & T/D |
PAC 1359 |
1.522 |
1.050 |
N/A |
0.726 |
375 @ 2.200 |
1200 @ 1.300 |
895 |
1.190 |
0.900 |
Dual High lift - works well in TA/FC & T/D |
PAC 1360 | 1.522 | 1.050 | N/A | 0.726 | 400 @ 2.250 | 1252 @ 1.300 | 895 | 1.190 | 0.950 | Dual High lift - Short version 1354 |
PAC 1362 | 1.725 | 1.225 | 0.871 | 0.635 | 475 @ 2.300 | 1515 @ 1.200 | 945 | 1.134 | 1.100 | Triple Spring - Pro Stock |
PAC 1363 | 1.725 | 1.225 | 0.871 | 0.635 | 525 @ 2.350 | 1565 @ 1.250 | 945 | 1.134 | 1.100 | Triple Spring - Pro Stock |
PAC Racing Spring- Triple Valve Spring vs. Dual Valve Spring |
High Perfomance valve spring testing 10K RPM |
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