Jims Catalogue

VALVE & GUIDE INFORMATION

PRECISION VALVES FROM JIMS ® These valves are made from the highest grade, one piece, stain- less steel and heat treated forgings. Each valve has a bearing quality hardened tip at the end of the stem to prevent prema- ture wear with high-lift applications. This special design includes a polished 45 degree lead below the lock ring groove to prevent seal damage. Each valve is then nitrided with a special process and the stem is centerless ground to a micro finish for longer life. PRECISION GUIDES FROM JIMS ® Valve guides are made from both manganese bronze or Micrograin Cast Iron. Both incorporate a special high temp Viton O-ring seal. This seal will prevent any oil from passing between the guide and the head. Guides also incorporate a smooth lead in self-aligning radius for the best possible alignment during installation. The nose is also designed with a tapered guide that

will give an increase in air flow. At the top of the guide, there is a spe-

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cially designed super grip finish that will keep teflon or k-line style seals in place. We have also shortened the top of the guides for high lift cams to clear all valve spring collars. With Manganese Bronze Alloy, intake guides can be fit to .0008” and exhaust guides can be fit to .0012” or more depending on application - when used with JIMS ® valves only.

Bearing Quality Hardened Tip.

A shorter valve seal area provides extra room for high lift applications excluding EVO & Twin Cam ® stock replacement models.

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Micropolished 45˚ angle below the lock groove prevents excessive stress on the valve and elimi- nates the need for using a protective plastic tube when installing valve seal. Special heat treat and nitride process reduces wear and friction.

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To eliminate the possibility of a Teflon ® or k-line style valve seal slip- ping, a special serrated finish is used to mechanically lock valve seals in place.

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A special hi-temp Viton ® O-ring pre- vents oil infiltration between the guide and head.

One piece, forged body turned from racing grade stainless steel alloy.

A self centering tapered section and radius transition point makes instal- lation effortless and simple.

Aerodynamically opti- mized valve pattern for improved airflow.

The tapered nose design is specifically designed to produce better air flow than conventional guides.

45˚ Precision ground face.

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