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Primary and secondary injectors


zane9000

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I'm going to be running a megasquirt with dual throttle bodies with throttle body injection. I was wondering what peoples opinions were about running 2 injectors (primaries) per throttle body for low load situations and having a third (secondary) injector kick in for high load situations. I have seen this concept applied to rotary cars and was just wondering if it would be worth experimenting with.

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Using the Staged Injector function of Megasquirt works really well for situations where you need big injector flow at the high end of your load profile, but want good idle/low speed running characteristics.

 

 

As a side note, It is possible to get good low speed running with the Megasquirt running pretty large injectors unstaged - I've gotten good results using a single set of 75 pounders on an L6. How big do you need to go?

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I really dont need to go that big. But I was just curious about the benefits ifI goto larger injectors. I was thinking I may eventually put one 440cc per throttle body for normal use then have a 1000cc switch on for high load situations... but that will be in the future.

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