Fuel injector size ?

[Rolling_Thunder]

Need to know what size fuel injectors I will need for a 496ci Stroked Mopar wedge.... will be between 600-650HP

[Blown353]

Naturally aspirated? Supercharged? Turbocharged?

Reason I ask is the "typical" BSFC numbers vary for the different engine configurations.

If you figure a "middle ground" .50 BSFC number for a naturally aspirated combo, I'd plan on ~50 lb/hr injectors.

( 650 hp X .50 lb/hp/hr (BSFC) ) / 8 (# of injectors) * 1.2 (20% headroom on the duty cycle) = 48.75 lb/hr per injector.

If you're running turbo/supercharged, expect a higher BSFC. To play it safe use a .65 lb/hp/hr BSFC number in which case you'd be best off with 64 lb/hr injectors.

Don't forget to match the injectors (high or low impedence) to your ECU.

Troy

[rocketman]

i've have 160's in my 710.

[John Monnin]

A good page for calculating injector size, Theres is a nice automatic caluculator there

http://www.stealth316.com/2-air-fuel-flow.htm

Stealth316.com has a lot of great technical article especially if you are going turbocharged

Using the fuel injector sizing program 50lb/hr injectors @80% injector duty cycle and 50% BSFC are good for about 640 HP, Blown353 made a good suggestion

[Rolling_Thunder]

nice... thanks guys... My plan is to for a while, run a 8:1 compression and hopfully get 650HP from it... The engine is not built yet but I am just doing the headwork right now... I want in the end around 800HP with a Procharger system... but I can always upgrade injectors later on - I want to get all the computer non-sense done ahead of time.... So I'll start looking for 50lb injectors --- dumb question but do any factory applications use these ?

[D1Camaro]

I dont think so. Most stock engines run 30lb injectors or smaller

[Reckless]

I can give you a smoking deal on some low-impedance 65-pound injectors if you call me.

Low-impedance injectors capable of supporting 900 horsepower. I ordered more than I needed, and now I have 7 extra sets to either sell or return. I'd rather sell them to be honest with you.

These injectors MSRP for about $630 a set. Give me a call. You won't believe the deal.

These are only recommended for after market type ignition systems with the appropriate drivers for low impedance injectors.

Pink Top (part number 30-6508)

http://www.powerandperformancenews.c...00_600x600.jpg