diff between MPFI and Tuned port?
TPI is a MPFI setup.
MPFI = Multi Port Fuel Injection. Simply one injector for every port.
TPI = Tuned Port Injection. Simply each port has a tuned runner.
TPI setups have MPFI cast into them... the same MPFI by Rochester stamp that 2.8's and 3.1's share. However referring to a 2.8 or a 3.1 as a TPI engine would be inaccurate since they don't have the tuned runners. Some other GM engines share the TPI designation.
MPFI = Multi Port Fuel Injection. Simply one injector for every port.
TPI = Tuned Port Injection. Simply each port has a tuned runner.
TPI setups have MPFI cast into them... the same MPFI by Rochester stamp that 2.8's and 3.1's share. However referring to a 2.8 or a 3.1 as a TPI engine would be inaccurate since they don't have the tuned runners. Some other GM engines share the TPI designation.
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RABMAN
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Sep 18, 2015 09:02 PM
