NUCLEUS Sports Elite Valves have helped win championships and are currently being further developed to help next years winners. Suitable for road and race use. The NUCLEUS valves are forged in one piece from 21-4N stainless steel, a high chromium manganese austinetic alloy, to BS 970 349S52. Whereas 99% of engines use stainless only for the exhaust and a lesser material on the inlet, both NUCLEUS inlet and exhaust valves are made of stainless steel with an extra hard Stellite 60 pad friction welded to the tip. We do not supply two piece valves as they are designed by accountants rather than engineers.

NUCLEUS POWER GUIDES ARE AVAILABLE FOR ANY VEHICLE. These guides are made from certified aircraft grade copper-nickel-silicon alloy designed to compliment NUCLEUS valves. Honed to ultra close clearances, they last on average more than twice the life of standard valve guides. Consequently, leading to valves that will enjoy a longer service life. This, coupled with improved sealing to the valve seats, leads to better starting, increased power and improved fuel efficiency. Better value for your money all round.

LEAD-FREE CONVERSIONS. Your head machined and fitted with silicon steel hardened inserts. These inserts will not rust if left standing like other seats. Experienced in all types of difficult engines. The Cylinder Head Shop offers a high end service to discerning and demanding owners not normally offered by the auto trade. The way to solve all problems caused by unleaded fuel. We offer a while-you-wait service by appointment.

VALVE SEAT CUTTING ON SERDI EQUIPMENT. Your existing seats cut using our Serdi 100 and Serdi 5 to 3 or 5 angles for proven performance, longevity and efficiency. VALVE SEATS. Silicon steel rings in standard or oversizes, from stock . One off custom made designs to order from superior metals.If you want to do your own conversion, we can supply the leadfree seat and insert.

K-LINE VALVE GUIDE LINING. Race proven in efficiency and drastically reduced wear rate leading to increased longevity. Improved fuel/air mix consistency and less oil drawn into combustion chamber due to close tolerance fit. Pioneered for motorcycles by The Cylinder Head Shop. See our report on K-Line Guide Lining now.

VALVE GUIDES. In standard or oversizes from stock. One off custom made designs to order in aircraft quality Colsibro and other even more high specification materials.

REPLACEMENT VALVES. Apart from our NUCLEUS SPORTS ELITE range, we offer a supply and demand service for classic and modern vehicles called CLASSIC ELITE and STREET ELITE. We also manufacture one off custom made designs to order using the same high specification materials, machining and treatments. Ask for NUCLEUS STREET ELITE VALVES.

VALVE RE-FACING. Using our Serdi 2 Valve Centre to less than .2 of a thou tolerances. By re-facing original valves to the same exacting angles and standards as re-cut seats longevity and performance are improved at little extra cost. Most valves can be restored in this way.

TWIN-PLUG CONVERSIONS. Twin-plug conversions are possible to almost any head and will improve combustion and increase performance. In addition, we have pioneered some techniques not even used by a OEM factories. Inspect our opposing angled Triumph twin conversion. Consider flame paths sculpted into your combustion chamber.

GAS FLOWING. Any head can be improved, some beyond recognition, by gas flowing. Our technician is an Ex-Dave Vizard who supports championship winning motorcycle tuner Len Paterson. In general, we tune for low and mid range increases but fast road and full race options are available. While we respect Dave's reputation, and have benefited tremendously by what has been learned, we have also developed new techniques and approaches in line with modern materials and technology matching the close tolerance work we have pioneered.

ADVANCED ENGINEERING AND HEAD RESTRUCTURING. Re-angled valve positioning and angles, re-shaped combustion chambers, fins re-shaped, plug diameters changed. Exhaust stubs changed from to screw into push on or push in and vice versa, manifold lengths increased, carb throat size increases and flowed. Anti-reversion steps inserted. Guide housing re-sized for over-size guides where necessary. Heads, barrels and cases skimmed.

T.I.G. WELDING. Cracks repaired successfully, bombed out combustion chambers repaired. In some cases this will require seats to be replaced.

METAL FINISHING THROUGH HOT WASH CLEANING AND VAPOUR BLASTING. We have spent the time to discover the best beads with the best system to deliver show winning results. Better than new. Heads, cases or other parts. The Cylinder Head Shop offers hot wash cleaning as a means of de-greasing and drying your parts, or, for that better than new, longer lasting finish we offer a vapour blasting service (while-you-wait by appointment).The vapour blasting method combines water pressure with air pressure and selected glass beads. This gives a much harder, wheather enduring, silky sheen finish. By comparison, conventional beadblasting gives a dull powdery finish which both stains and wheathers much quicker. Vapour blasting is the preferred fininsh for collectors and enthusiasts.

TOP HAT INSERTS. Superior to the Helicoils we use for other applications, the brass "top hat" shaped inserts are best replacements for replacing worn out threads for cylinder head and casing stud and bolt use.

DYNOMETERS / ROLLING ROADS.

HOW TO PAY.

Parts and services can be paid for by credit card at the shop or by phone.
UK or overseas. 
 

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