Will my cam work with your setup?

Any cam will work with our kits, the correct question to ask is what cam works best !!!

N/A versus Turbo Versus Blown Cams

For optimal performance we don’t recommend any other cams other than our own. This might sound very conceited, but there's actually some very good technical reasons why...

Essentially, Normally Aspirated (N/A) and Turbo cams are far from optimal in a blown application and apart from our cams, there are simply no other blower specific cams on the market.

N/A cams have too much valve overlap (the time when both inlet and exhaust valves are open at the same time). The reason for this is to allow the exhaust charge exiting the cylinder to 'scavenge' (draw in) the inlet charge. In an N/A application where the charge has to be 'sucked' into the cylinder this provides additional flow volume and it one of the ways that N/A cams make power. 

However. In a boosted application the charge is pushed into the cylinder, not sucked in, and so the overlap period allows the charge to be pushed right through the cylinder and out of the exhaust port. This means that you waste a lot of boost straight out of the exhaust pipe. The net effect is that there's less charge in the cyclinder, peak cylinder pressure is lowered and you make less power.

Turbo cams have a different issue. You might assume that as it is a forced induction application, with reduced valve overlap due to a larger lobe separation angle, that they would work just fine, however turbo engines have a large restrictor in the exhaust (the turbocharger) this means that you end up with a much higher port pressure on the exhaust. To compensate for this differential pressure (flow will always move from a high pressure to a low pressure area), turbo cams have split duration valve timing to ensure optimised flow. Unfortunately the split timing is the opposite of what you need for a blown application, which has a higher inlet port pressure. 

So whilst a turbo grind may be a little better than an N/A grind, it is still not optimised for a blown application. This is why we developed our own blown grind cams. 

So if you want to maximise the available boost for your blown application, then there is only one choice. Run a Joe Blow Cam.

Compression Ratio

If you do decide to use your existing camshaft then you should also find out what compression ratio your engine was set up with, especially if you are adding a supercharger on to an N/A performance build. Generally N/A performance camshafts are installed along with an increased static compression ratio to raise cylinder pressure, which on a normally aspirated engine is where you make extra power.

However, with a blown application it is the blower that increases the cylinder pressure, so if your static CR is too high to start off with, then adding boost will cause your dynamic compression ratio to be far too high which will result in detonation and almost certain engine damage. As a rule of thumb you want a static CR of no more than 8 - 8.5:1 which is generally a lot lower than most performance N/A cams recommend.