In the current state, the car has around 230whp and is, at least to this point, reliable even under heavy use. Octane requirement is 95 RON / 91 AKI, this seems reasonable for 9.5:1 and 0.6 bar (9 psi). The intake air temperature is only 10 K above ambient temperature which leads to the conclusion that the current setup is somewhat efficient.

The goal for the next stage should be a significant gain in power while maintaining reliability and practicability.

Related:

• https://www.miataturbo.net/supercharger-discussion-38/searching-holy-rotrex-grail-106890/
• https://mx-5.de/forum/showthread.php?324195-C30-94-Kompressorumbau
• Previous Consultation (camshaft choice)

As one can see, the airflow of the supercharger at reasonable efficiency (~0.65) is around 0.36kg/s.

In theory, this should lead to at least 360whp. Previous archivements were 302whp @ 6.74krpm by bigb5031, 93krpm @ supercharger. Supportive mods were I/H/E and mild head work, stock 9.5:1 compression, 98 RON / 93 AKI.

315whp @ 7.317krpm by trackdogracing, 100krpm @ supercharger, I/H/E, E85.

324whp @ ~7.3krpm by kraftwerks, 100krpm @ supercharger, mods unknown.

• Torque output should be under 250lb/ft / 340nm (at the wheels)
• Octane requirement must be ordinary 98 RON or lower. 100 / 102 / E85 is not an option.
• Engine should not be knock limited, even under harsh conditions (45 C ambient / track use)

• Target RPM
  • 105mm sc: 8500
  • 100mm sc: 8100
  • 95mm sc: 7700
  • 90mm sc: 7300
• Pistons: Compression Ratio, Bore, Brand/Model

• Pistons: Wiseco K590M84 84mm 10.0:1
• Conrods: Oliver A-Beam

• Head Studs: ARP
• Main Studs: ARP
• Rod Bearings: ACL Race
• Main Bearings: ACL Race
• Oil Pump: Boundary Stage 2

• VVT
• Tomei Cams, why?