A&A injectors

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Oct 12, 2008 | 09:25 AM

dsmlights

Thread Starter

Burning Brakes

Joined: Nov 2007

Posts: 882

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From: Miami Florida

A&A injectors

hey guys does anyone know if these are rated at 43psi or at 58 psi 60lbs

Oct 12, 2008 | 12:06 PM

BLOWNBLUEZ06

Tech Contributor

Joined: Apr 2007

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From: Forney Texas

at 43.5psi

at 58psi, they're supposed to flow 69lb

Last edited by BLOWNBLUEZ06; Oct 12, 2008 at 12:09 PM.

Oct 12, 2008 | 12:53 PM

dsmlights

Thread Starter

Burning Brakes

Joined: Nov 2007

Posts: 882

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From: Miami Florida

thank you so much.

Oct 14, 2008 | 05:17 PM

MIKE-C5

Race Director

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From: San Antonio Texas

St. Jude Donor '05-'06-'08

Quote:

Originally Posted by BLOWNBLUEZ06

at 43.5psi

at 58psi, they're supposed to flow 69lb

Oct 14, 2008 | 11:29 PM

ProjecT 9

Pro

Joined: Jan 2007

Posts: 743

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From: Houston TX

Quote:

Originally Posted by BLOWNBLUEZ06

at 43.5psi

at 58psi, they're supposed to flow 69lb

So your saying if the rail has 58psi then the injector is actually flowing 69lbs instead of 60?

So what if the rail has 62-64psi like my car, what is the injector flowing then? The rails PSI is relative to how much voltage the fuel pump is getting right? I've noticed that when I start my car in the morning my fuel pressure gauge is at its highest (64psi). After driving for some time the voltage drops and the fuel pressure drops to about 62psi. Just making sure all is ok.

Jon

Oct 15, 2008 | 08:01 AM

BLOWNBLUEZ06

Tech Contributor

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From: Forney Texas

Quote:

Originally Posted by ProjecT 9

With the 60lb injectors, they will flow 70.5lb @ 62lb fuel pressure and 71.5lb @ 64psi at 0kpa vacuum on the intake. Once you set the IFR table and tune the car, you're ok. You need to know what they flow to get your IFR table right. If your fuel pressure is dropping as the vehicle warms up, you can compensate with the ECTvs.VE table. ( not sure what it's called since I don't have my HPtuners in this computer.) Fuel rail pressure is based on how much voltage to the pump under load vs. how much the pump flows vs. how much demand for fuel or load there is vs. how much pressure drop there is in the lines vs. your regulator's ability to control it. The pressure at the injector will take that into account and add the amount of restriction at the rail when at max duty cycle. If your car is tuned properly, you have nothing to worry about. If you had any fueling issues, your tuner should have identified it.

Oct 15, 2008 | 10:34 AM

kromberg

Le Mans Master

Joined: Jan 2001

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From: Lafayette Colorado

Increase the fuel pressure to artificially increase the flow rate of the injector is not a good idea.

Oct 15, 2008 | 11:41 AM

BLOWNBLUEZ06

Tech Contributor

Joined: Apr 2007

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From: Forney Texas

Quote:

Originally Posted by kromberg

Increase the fuel pressure to artificially increase the flow rate of the injector is not a good idea.

Only after you go beyond a certain pressure does it become an issue and we're nowhere close to that number. We are dealing with near stock fuel pressures here.