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We have been super busy, but finally had time to test some custom cams we had made for us and the results were pretty awesome.
For those that are not super familiar with the cams on the LE5/LE9, the cams have integrated passages in the front that allow oil to flow up to and back from the cam actuators on the front of them. This VVT mechanism is really a nice benefit, but because of the passages in the front of the cams, cam blanks are not available. This has left the options for cams in the past limited to reducing the base circle on the cams slightly, which does increase lift, but does not really change duration much. The duration is what is going to allow the engine to breathe in the upper RPM range and is what we were after with these cams, since it also complimented the power profile of the Rotrex supercharger also. The custom cams we had made for us increased the duration of the intake cam 19 degrees and the exhaust cam duration was increased 25 degrees overall. This allowed the engine to breathe much better on the top end of the RPM range with some drop in torque in the lower RPM range, which was the tradeoff that we were looking for, the end result was 358HP at the wheels @10.5PSI.
We will be posting up more information on the pricing and install of these in a little bit. These can be installed on an otherwise stock head also without any modifications.
As always, if you have any questions, just let us know!
Dave
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For those that are not super familiar with the cams on the LE5/LE9, the cams have integrated passages in the front that allow oil to flow up to and back from the cam actuators on the front of them. This VVT mechanism is really a nice benefit, but because of the passages in the front of the cams, cam blanks are not available. This has left the options for cams in the past limited to reducing the base circle on the cams slightly, which does increase lift, but does not really change duration much. The duration is what is going to allow the engine to breathe in the upper RPM range and is what we were after with these cams, since it also complimented the power profile of the Rotrex supercharger also. The custom cams we had made for us increased the duration of the intake cam 19 degrees and the exhaust cam duration was increased 25 degrees overall. This allowed the engine to breathe much better on the top end of the RPM range with some drop in torque in the lower RPM range, which was the tradeoff that we were looking for, the end result was 358HP at the wheels @10.5PSI.
We will be posting up more information on the pricing and install of these in a little bit. These can be installed on an otherwise stock head also without any modifications.
As always, if you have any questions, just let us know!
Dave
