Specialist Mazda Rotary Rebuilds & Services

01249 408888

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Bridge Porting

The corner seal track limits how far we can go with a standard Street Port otherwise the rotor's Corner Seals can fall out of the rotor and become lodged in the port itself. A Bridge Port can circumvent this...

A Bridge port opens up the intake port on the leading edge right out to the corner seal track and the continues onto the other side of the track. The steel left between these inner and outer ports serves as a supporting 'bridge' for the corner seals to ride across and gives the name 'bridge' porting.

Bridge ports can be varied in size depending on the engine, for example the 13b RENESIS engine cannot typically be wildly bridge-ported without cause other complications and in some instances the rotor itself can be slightly notched to help increase the area of the port and improve airflow. If all sides of the intake port are bridged, this is known as a full-bridge, as most often utilised on our RX7 13b REW bridge ports. If only the secondary ports are bridged (four-port engines), this is known as a half-bridge whilst if only the auxiliary ports are bridged (six-port engines), this is referred to as an auxiliary port.

RX8 Half Bridge Porting

  • Without supporting modifications - 8bhp increase approx.
  • With other modifications such as intake, exhaust and ECU Mapping - 12-20bhp increase approx.

£480 inc. VAT

RX7 Bridge Porting

  • Without supporting modifications - 25bhp increase approx.
  • With other modifications such as intake, exhaust and ECU Mapping - 150-200bhp increase approx.
  • Ideal for Race/Drag Racing etc.

£540 inc. VAT

Get in touch

Address

  • RotaryMotion

  • Stockham Marsh Farm

  • Foxham

  • Wiltshire

  • SN15 4NL

Telephone

01249 408888

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Opening Hours

  • Mon - Fri: 08:30 to 17:30

  • Sat: By Appointment

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