[Grady Clay]

Steve,

Yes, ‘E’ cams or ‘Solex’ are far more streetable than ‘S’ cams and just as ‘fast’. The ‘S’ cam has the wonderful benefit of really ‘coming on the cam’ feel at about 4000 rpm and pulls strong to 7300 rpm.
For your street use, the ‘E’ cam is very suitable (almost ‘ideal’).
If you are cruising along at 3500 rpm and ‘punch it’, you will appreciate having headrests.

240 hp is an unreasonable expatiation unless you raise the CR very high and use leaded 114 octane race gasoline.
You can build the engine using the bolt-on 92 mm RSR Nikasil P&Cs (2808 cc) and get above 11:1 CR (perhaps closer to 12:1 CR).
In this configuration you must use twin plugs and always use race fuel – no exceptions.
I have several of these engines with MFI. They are wonderfully fast and comfortable on the street – IF you have access to the fuel (we have a few regular drive-up gas stations with 114 octane – at $8.00/Gal).

I recommend you settle for something around 200 hp with ‘E’ cams, twin plugs and 9.0:1+ CR.
This will make for a wonderfully fast and civil street 911 with only ‘pump’ premium fuel.
This will be far more fun and a lot more performance than your no-overlap CIS cams.

In every case, you need a good, full-fin front oil cooler with electric fan and turn the engine fan at 1.81:1 crank speed using a 245 mm 11-blade fan in warm weather.
This also makes the A/C and heaters work better.

I hope this helps.

Best,
Grady