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What size injectors would i need?

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Old Jan 16, 2018 | 01:12 PM
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Default What size injectors would i need?

Not sure the kind of power its going to make but i have a 4.030 x 3.900 engine the lunati cam the specs are duration at 50 217/223 lift .549/.549 with a 113 lsa i also have a 340 lph fuel pump and a ported set of 243s with 10:1 compression its also using the truck intake since its in a silverado,
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Old Jan 16, 2018 | 01:15 PM
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I would think with cam/heads and bolt-ons 42lb injectors would be enough. if you're planning on e85 then next size injectors.
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Old Jan 19, 2018 | 06:35 PM
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Or 36#
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Old Jan 19, 2018 | 10:37 PM
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Good lord... baby cam, HUGE fuel pump

Go with the 36's.

I ask the question why the 340 pump, when the 255 is MORE than adequate? I actually question if the stocker would have been plenty...
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Old Jan 20, 2018 | 07:45 AM
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Default Denso injectors 450 cc : Injectors

Dusty, I would sell you a Denso 42. lbs "long" fuel injector (A/C Connector ?)

This injector will Idle BETTER that OEM 27's.

Your engine should make 550+ HP (640 x .8 is the requirement)
The truck intake (TBSS ?) should use the Long Injector.
MAX RPM is important for a correct specification ?
Does your harness use the Truck Injector Connector ?

Lance
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