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Author: Subject: Injector flow rates

posted on 21/11/18 at 05:08 PM Reply With Quote
Injector flow rates

Hi gents,

I'm half way through the inlet system on the project and I want to upgrade the standard injectors for some stubby ones. The merc ones are expensive and known to be unreliable/leak. As usual google is throwing up loads of conflicting answers (sigh).

The engine is a 4-pot 2,300cc Supercharged. They are 197bhp std and its now going to be more like 250hp. At a later date it may be treated to a larger charger to get to the 300+hp mark. What would be my best flow rate for injectors?

Also running a adjustable regulator if that helps.


[Edited on 21/11/18 by J666AYP]

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posted on 21/11/18 at 06:19 PM Reply With Quote
Im running Bosch 440cc injectors on a Zetec N/A putting out 221BHP and 189 ft/lb

This injector was selected and installed by emerald when they mapped the car

Luego velocity XT 2.0ltr 221.3bhp 178.9lbft

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posted on 22/11/18 at 08:50 AM Reply With Quote
Here you go:

480 cc injectors should be good for up to 300bhp at 90% duty cycle.

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posted on 22/11/18 at 10:54 AM Reply With Quote
Yep, I've run 280 on 440s, pushing above 300 I switched to 540s. You want to keep your DC below 80% ideally, depending on how willing you are to rebuild engines.

Report your local potholes, it actually works!

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posted on 22/11/18 at 04:33 PM Reply With Quote
Thats great, thanks gents! one more problem solved.


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