Injector sizes HELP!

[TehNef]

Injector sizes HELP!

whats a way to find out what injector sizes to use. I have a 25det neo with 6boost manifold, greedy plenum, garret gt3582r turbo forged pistons, unsure on what fuel pump size to get plus injector sizes.

[baron_von_bootsector]

People will need a little more info to be able to help out:

How much boost are you planning on running / what is your power target?

Are you planning on running E85?

Are you planning on an external inline pump / pot or just an in tank pump upgrade?

[TehNef]

Around 16-18 psi not going to run 85 and just an intake upgrade 

[KiwiRS4T]

Rule of thumb used to be 1cc per hp so 500cc for 500hp but with modern injectors bigger than necessary injectors will  still idle and perform fine so get one of the popular sizes such as 750 or 1000 depending on what you find available.

[baron_von_bootsector]

A decent in tank pump (something like a Walbro 450 would be a good choice) and 725cc-750cc injectors would fine or 1000cc if you want plenty of headroom and the ability to go for E85 at a later date.

 

   

[vxsr33]

I'm running xpurt 1000cc injectors on my r33 rb25det and only running 250rwkw. They idle perfectly and perform well under all load conditions. Pretty much feel like stock injectors.

[pol1on1]

Rule of thumb used to be 1cc per hp so 500cc for 500hp

Sorry for thread hack.
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So what the rule of thumb for E85 ?

[vxsr33]

Sorry for thread hack.
.
So what the rule of thumb for E85 ?

E85 uses approx 35% more fuel. So if 500cc = 500hp on 98 (i'm assuming at crank) then you will need 675cc to make the same power on E85