FREQUENTLY ASKED QUESTIONS

Q. Why should I buy a Kelford cam over another brand?

 

A. Because we strive to be the best. Our lobe designs are ultra modern, we innovate daily and we have a long term commitment to helping our customers win.

 

 

Q. Will this camshaft work with my factory valve springs?

 

A. Most likely not. Factory springs will often have pressure that is too light for extra boost or rpm, they also coil bind sooner than a high performance valve spring.

 

Kelford cams usually engineer a valve spring to suit the characteristics of the camshaft design. We also build in an ‘over rev' safety margin while keeping in mind that too much valve spring can also be undesirable. It is important to follow our recommendations on valve spring choice for our camshafts.

 

 

Q. Can I use factory pistons with this cam? Will there be sufficient clearance?

 

A. We get this question a lot, but there is no simple answer. The person building the engine is responsible for checking valve to piston, valve to valve and all other clearances. Modern computer controlled variable cam timing systems offer engines a much wider power band and when using performance camshafts with variable timing engines you need to check valve to piston at the most advanced intake setting that you will use and at the most retarded exhaust setting that you intend to use.

 

 

Q. Do I need adjustable cam gears?

 

A. Yes. Most Kelford Cams are either made to time in at the stock position, or on some models we build in the amount of advance or retard that suits the application. But there are other variables (like milled heads or blocks that retard timing on O.H.C. engines) that effect cam timing so adjustable gears are a great tool to ‘optimise' cam timing.

 

 

Q. What kind of power gains can I expect from installing a Kelford Cam?

 

A. This varies depending on engine type and on what other corresponding modifications have been made. On naturally aspirated engines that are stock apart from headers, our stage one camshafts normally gain ten percent. For turbo street engines that are well built we often see over twenty percent gain. For racing engines the gains just get bigger and better.  

 

 

Q. Will this cam give my engine a rough/lumpy idle?

 

A. As overlap increases idle quality decreases. So generally speaking when you use a high performance camshaft you will have more overlap than on the factory cam so idle characteristics will alter. The amount of idle roughness depends on many other things, for example if you have a 280 degree cam in a Toyota 4AGE and it is on the stock intake manifold, the idle will be much worse than if you had individual runners on it. Most turbocharged cars have less overlap than if it were non turbo, so their idle is slightly better.

 

 

Q. Can I use solid lifters with my hydraulic cam?

 

A. No. The valve will close far too rapidly.

 

 

Q. Can I use hydraulic lifters on my solid cam?

 

A. No. The length of the clearance ramp on the solid lifter camshaft will add too much

 

 

Q. Will my naturally aspirated cams still be suitable if I turbo charge the engine?

 

A. If it is a single cam engine, most likely not. This is because the centrelines may be too close and there will be too much overlap. If it is a twin cam engine, you can fit adjustable cam gears and widen lobe centres to reduce overlap. This is not ideal. Kelford turbo specific camshafts have many special features that only suit turbo engines so the best option is to have a turbo specific camshaft made to suit your needs.