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Mazda RX-7 FD

Does a hyper grounding system add 15 rear wheel horsepower to a Mazda RX-7 FD?

Updated June 2026

While a Pettit Grounding Kit is noted as part of the modification list on a 1994 RX-7 that produced 345 rear wheel horsepower 11, there are no dyno comparisons or performance metrics attributed directly to the installation of the grounding kit itself.

This answer was generated by GarageBot's AI from enthusiast forum discussions. Always verify torque specs and safety-critical procedures against the factory service manual before working on your car.

Discussed on the forums

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  2. S5 n/a with a few bolt-ons
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  5. A new Rx7 is "heavily" under development...
  6. 506RWHP/387TQ @25psi
  7. 350rwhp on pump gas @ 10psi , Garrett To4E, Adaptronic PNP
  8. Dyno'd the 1JZ RX7....
  9. Highest horsepower daily driver FD
  10. rwhp on stock twins???
  11. Stock NS Twins at 15psi
  12. where does this go?
  13. Corner Balanced

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