I have what looks like that exact set up in a 2.4 with both E cams and the Mod Solex (dc30). You are probably at a 9.5/1 CR
The e cams work nicely in this setup. They are matched to the MFI exactly and with the increased CR produce a noticeable increase in torque and HP. They do, however run out of breath at 7000 RPM's. I also burned a piston with this setup as temps got a bit hotter then I should have let them.
Recently I went to the DC30 (mod solex) grind. This is basically the e-cam with more lift. What it does is sacrifice some compression for VE (volumetric efficiency). For me this was desirable as I did not want to burn another piston.
The result of the DC 30 cam is a VERY smooth running engine that increases in HP all the way to 7300 rpm's and probably beyond. The down side is that the E MFI is not exactly tuned to this cam. I installed an air fuel meter to help get it dialed in and while close it is not perfect. I achieve optimal air fuel mixture at idle and 3/4 + throttle. I am rich at cruising speed 1/4/ - 1/2 throttle.
Both setups produce a car that is surprisingly quick.
Chris
73 911 E
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