Billet Roller Rockers
All of our team are engine builders, cam designers and racers. We have a vast knowledge of engine combinations for all types of motorsport and we know how to match camshafts to engine and vehicle requirements. If you need advice or have specific requirements that may require custom design.......Plug N Play for street use.
CamTech Cams B16/18
CamTech Cams Toyota Jzx
BASIC CAMSHAFT KNOWLEDGE
A camshaft actuates (opens and closes) the engine valves. Rotating at one-half the crankshaft or engine speed, the camshaft is responsible for the correct timing (with respect to piston location) of air/fuel mixture and exhaust gas flow in and out of each cylinder.
In today's cars, the camshaft is located in either the engine block - an overhead valve design (OHV), or in the cylinder head in the overhead cam layout (OHC). Some engines even employ a double overhead cam (DOHC) design in which there are two camshafts - one for the intake valves and the other for the exhaust.
Although there are differences in physical construction, the operating principle is the same in either case. As the camshaft rotates, the lobe pushes up on a lifter or down on the lash or valve cap. In an OHV engine, a pushrod is seated in the lifter and acts as an intermediate link between the lifter and rocker arm.
In both engine designs, the rocker arm or lash cap compresses the valve spring to open the valve. As the cam continues to rotate, the force is relieved and the valve closes.Usually, the contour on both sides of the lobe is the same (the contour, or profile, controls the acceleration of the valve). However, if it differs from side to side, the camshaft is said to be asymmetric. The Ford 2300cc engine has asymmetric lobes. If the intake and exhaust lobes have different profiles, the camshaft is referred to as dual pattern design. Some of the so-called "mileage" camshafts are dual pattern.
The measurement that indicates the amount, in inches, that the cam opens a valve is the lift. There are two types of lift - cam lift and valve lift. Cam lift is the distance the lifter is raised by the cam lobe. Valve lift is the amount of valve spring compression (how much the valve opens) due on the mechanical advantage of the rocker arm. (OHC engines that do not use cam followers or rocker arms measure valve lift directly by cam lift. In these engines, cam lift and valve lift are identical.)
Toyota 1.6L 4AG 20v 650hp CamTech
Black rev 4AG 9.89sc 11,000 rpm
Hyundai AWD 4G63 turbo 550hp CamTech 9.4sc
New Camshaft Listings
We have updated some Camshaft information and added new products
1.Toyota 6 Cyl 1JZ
2.Toyota 6 Cyl 2JZ
3.Toyota 6 Cyl 1FZ-FE DOHC
4.Nissan 4 Cyl SR20 GTi-R N14 DE & DET
5.Nissan 4 Cyl SR20,16,18 VVL
6.Nissan 6 Cyl RB20 - RB25
7.Toyota 4 Cyl 4AGE
8.Nissan 4 Cyl CA18 DOHC
9.Nissan 6 Cyl RB26
10.Mazda 1.8L DOHC Turbo GTR
11.Proton 1.3/1.5 SOHC
12.Proton Campro 1.3/1.6 DOHC
13.Mitsubishi 4G63 turbo
14.Proton GTI 1.8
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APTuning For More Information
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