The cam profile which influences the performance of a camshaft is the most important element in a camshaft design. At JUN, the software only for cam profile designs is used, and the automatic design by the computer is performed. In order to test the cam shaft designed on the desk, the engine bench system of JUN which has combustion pressure measurement equipment is used. This system can analyze the state in a combustion room for every crankshaft angles. Various profiles can be tested.
Even if it says a camshaft in a word, the profile form is various by the type of a car. Profile form is decided in consideration of the difference of valve motion method etc. (direct type, a locker arm type, strength of moving part, valve size, port and combustion room form). If depending on types of a car, a profile may be restricted by the wall in a head, lifter hole size, locker arm form, etc. At JUN, when developing a high camshaft, the detailed data for each type of a car is taken, development is furthered simultaneously with a valve spring and retainer, and the optimal profile is determined.
In order to manufacture a highly precise camshaft, it can be said that the cam grinder with a high performance is indispensable. In our company, the CNC master less grinder with high processing accuracy was introduced from the early stage, and the camshaft has been manufactured. Since the camshaft grinder of our company can input the program data of a cam profile very finely, it can grind in the cam profile based on a design. The quality control is performed on the high standard like other products. The user is provided with the high product of quality.
You have to raise filling efficiency, in order to obtain a high output. Being required of a cam is lengthening time which the valves is opening. It is necessary to increase the amount of cam lifts in order to lengthen time which the valve is opening. The negative acceleration will become large if the amount of lifts is increased simply. The jumping phenomenon in which a valve separates from a cam, and the bounce phenomenon which is bounded when a valve contacts a valve sheet ring occur because when negative acceleration becomes large, the acceleration of a valve will exceed the acceleration of a cam. These phenomena not only spoil the performance of engine original but cause breakage of engine. The high camshaft must realize the conflicting element with which extension of time which is opening the valve, and reduction of negative acceleration. JUN high camshaft took positive acceleration large , and the action time of negative acceleration is keep a long time by shortening positive action time. By doing so, when a valve moves from opening operation to closing operation, a valve can move as smooth operation and can prevent jumping. Since positive acceleration becomes large at the side of close, the valve just before closing is added the strong brakes by the cam. The bounce phenomenon is prevented. The time near the maximum lift can be kept for a long time by opening a valve in a short time. Therefore, the good valve motion of efficiency is possible. The simulation and an experiment of the valve motion system are conducted based on such design theories, and a profile is determined. Here is the true performance for which a high lift camshaft is asked.
Stage 1 Kit Includes: Intake Cam, Exhaust Cam, and Valve Spring. Stage 2 Kit Includes: Intake Cam, Exhaust Cam, Valve Spring, and Type 1 Retainers. Stage 2R Kit Includes: Intake Cam, Exhaust Cam, Valve Spring, and Type 2 Retainers. Choose the cam profile that best suit your application from the list below.
RRP: 98700.00 Our price: 98600.00
Would you like to add any more information to help us with your order? This could be a model number/name, wheel offset/stud pattern or chassis number.
Then simply click the Add to Basket button to add 1 Jun Auto Stage 1 Camshaft Kit (Lash Type - LHA) to your basket.
Below is information only relevant to customers who live within the EU. The EU container service is a scheduled service which ships a
40ft container from Yokohama, Japan to Southampton, United Kingdom. The goods are then passed through EU customs and excise, repackaged and shipped on to any
address within the EU.
Please consider the lead times when choosing this service. The rates are far far cheaper than any other service but this service can only be offered
at these rates with the container at least 80% full. This is why we only ship 6 containers a year from Japan to the EU. If this service becomes popular we will look at shipping
containers more frequently.
EU Container shipping schedule
Last date for orders: 17 September 2010
Container ships (Japan): 29 September 2010
Container docks (Southampton, UK): 31 October 2010
Countdown to last orders cutoff:
EU Container:
22910
EU Container:
22304
Direct Shipping Services
There are a number of shipping options available by both air (EMS, SAL, TNT) and sea (Surface) for most countries. Login to your
account and progress to the checkout to see all shipping options for your country.
Below are various air and surface prices for our most common shipping destinations.
The following are ratings out of 5.
Quality: The overall quality of products made by Jun Auto
Stock: The normal stock level held by Jun Auto
Rarity: How rare products made by Jun Auto are
JUN Auto Mechanic Shop is another of Japan’s engineering powerhouses. JUN’s race and engineering history date back 50 years, and they produce a wide variety of high precision, quality crafted automotive performance products.
Participating in all forms of racing, including Speed Trials, drag racing, formula racing, and other highly competitive sports, JUN has been a visible presence in Japan’s automotive and motorsports history.
JUN is most famous for their engine building components, which include camshafts, crankshafts, and other unique items. Their "Super" and "Hyper Lemon" demo cars are well known across the world.
Planning a trip to Jun Auto? Our tuner map system will help you plan your route!
