305 TBI to TPI Conversion

Converting a TBI (Throttle Body Injected) to TPI (Tuned Port Injection) only provides a small amount of improvement and a different look. Because of the amount of work required it would be better to do a Sniper EFI Conversion.

Parts Required

• TPI ECU
• TPI manifold and throttle body assembly
• Fuel pump for 40 - 47 psi
  • ACDelco EP381
• Fuel lines - PTFE fuel injection
• TPI wiring harness
• Extended throttle cable
• Cruise control cable
• TV cable
• Air box

Extra Parts

• Electric fan conversion

Notes

Prefer parts from the 89-92 F-Body because of the MAP sensor versus the 85-88 using a MAF sensor.

http://www.tacreationsusa.com/tbi_to_tpi.htm

https://www.gmt400.com/threads/tbi-to-tpi-conversion-mpfi.39486/