Drag Illustrated Issue 178, September / October 2022 - Page 65

LARGE CHARGE

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PAC Racing Springs introduces a NEW valve spring for the large cubic inch mountain motor engines .
This spring can handle well over 1.300 valve lift run after run . It is a proven winner in Mountain Motor Pro Stock and Top Sportsman applications this year . This modern spring design can effectively enhance your racing engine valvetrain performance .
PAC Racing Springs has numerous other drag racing springs for engines that don ’ t need quite as much lift for various applications from hydraulic flat tappet to roller lifter applications .
CALL US FOR YOUR SPECIFIC APPLICATION TODAY . 866.799.9417
PAC-1369
• 450 lbs @ 2.550 Installed height
• 1675 lbs @ 1.250 Valve open height
• 1.180 Max coil bind height
• 942 lbs / in spring rate
• 1.750 Spring OD
Titanium Retainers and Chromoly seats avalable
Refined surface with multiple stage shot peening - including
NanoPeen TM
Technology
JR CARR WINS WITH PAC RACING SPRINGS !
Optimized and balanced natural frequencies between all 3 spring components
Championship Winning PACaloy material ( Superclean Valve Quality
Alloys )
www . RaceWinningBrands . com Visit RacingSprings . com
September / October 2022 DragIllustrated . com | Drag Illustrated | 65