PAC Racing Springs 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)

1200 Series features PAC Spring's Standard HP processing without scrificing performance.

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-Peened™ surfaces for enhanced durability & exotic heat treatment for minimal load loss

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

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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