TB993tt:
Mithras:
This for me is where the Singer lacks, the engine .....
For me the Lightspeed Classic has the best unit for the job, built bespokely by Schmirler using 30+ years of exclusively Porsche engine building and tuning experience and finely tuned on his exclusive Mezger specific engine dyno set up, lots of special parts inc titanium internals/ Gives 340PS from 6100 to 7400rpm (I have an engine with a Schmirler flat power "curve" and it is incredible) and creamy smooth torque delivery lower down (with a 379NM peak) tuned using factory Motronic.
One thing that I notice about that comparison has to do with the intakes. 6 individual throttle bodies with velocity stacks (like the Singer and all 911's before 1974, and all RSR's until present) really gives a snappy throttle response and sound that cannot be approached from a single throttle with plenum. The plenum does give superior low-end torque, so some builders use a plenum feeding 6 throttles for the best of both worlds...
These guys have some cool options:
http://www.rothsport.com/Products/Engine/Fuel-Injection-Systems/FI-Systems.htm
And this is the way a modern Ferrari engine should be, with ITB's:
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16 Cayman GT4, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi