what injector size

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Jan 26, 2014 | 12:59 PM

GS977

Thread Starter

Drifting

Joined: May 2005

Posts: 1,258

Likes: 38

From: springtown Texas

what injector size

what size injectors do I need for a 384ci lt4 with @450rwhp.
42psi ? I have ford red tops now that I read were good to @ 400 hp.
the red tops are 30psi correct?

Jan 26, 2014 | 01:14 PM

armysnipe

Racer

Joined: Jun 2010

Posts: 365

Likes: 27

From: Shelby Township Michigan

There's an injector size calculator at fuel injection connection.com that may help you decide.

Jan 26, 2014 | 02:37 PM

MrWillys

Drifting

Joined: May 2013

Posts: 1,736

Likes: 31

From: Reno Nevada

A 36 lb injector installed at 46 psi will feed 450 hp at 80 % duty cycle assuming a brake specific of 52.

Jan 26, 2014 | 04:19 PM

_ski_dwn_it

Instructor

Joined: Apr 2010

Posts: 170

Likes: 24

A 24lb injector is more than enough. Have a buddy with 383 in the 10s with them and I have run my 434 with 24lb injectors into the bottom tens for years. Run 48psi.

Jan 26, 2014 | 05:09 PM

leesvet

Safety Car

Joined: Apr 2011

Posts: 3,660

Likes: 22

I'd think that 24lb/hr would be good, but if you want to KNOW.....call Jon.
he knows more and can provide more info on injectors off top of his head than most can come up with from a book..or a degree.
Very smart guy.

See his videos on you-tube under FIC or simply fuel injector.

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