Quote:
Originally Posted by fastguy9r
Hello ! been thinking about turbo or supercharger for road racing ! Which one is best for the track ? Is twin turbo much better than single turbo ? Let me know ! Thanks Ken
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Check your sanctioning body class rules .... Here in OZ, you can only "race" a car in its original OEM guise, you cannot add a turbo or S/C where not originally fitted by the OEM.
FI in either form puts a "lot" more heat into the engine and ancillaries and managing heat rejection is crucial to engine life and overall reliability.
Until you are able to drive your car no quicker in basic format, then leave it stock - there is a lot more laptime in the driver first, and then think about suspension and brakes before you need to think about more torque, and the cost of finding lap-time rapidly escalates.
Figure on HPDE training days to get the first 5 seconds of lap time, then maybe 2-4K for suspension to get the next 2-4 seconds, the same again to improve the brakes (pads, cooling, specialist rotors etc) for maybe 1-2 seconds, then $2k to add a diff centre for another second, then $4-6K to add 2, 3 or 4-way adjustable shocks for another second or two, and thereafter, each second will cost $10K or more (built engine, improved cooling, FI if rules permit, sequential gearbox, non-OEM engine management, data logging yada yada).