Injector Duty Cycle and Air Flow Hz!

[Benji]

I am using the TMO datalogger to log my car consistently. My setup currently is as follows:

91 GSX - ported 14b, stock ported o2, stock ported wastegate and BR UICP. Everything else is stock (ie pump, injectors, fuel rail, head, bottom end)!

Now when reaching 4500 rpm the logger reads max air flow hz of (I believe) 1606 all the way through my shift point. What's the max air flow hz the stock hacked 1G mas can handle?

Also, when reaching 5000 rpm or higher my Injector Duty cycle shows close to 96%-97% and I am wondering if that's normal with the few mods I do have and boost set at 12 psi?

The Car has gone a best of 14.2 on 100 octane and 19 psi if that matters!

Any help is appreciated!

 

[Phoenyx]

Originally posted by Benji
I am using the TMO datalogger to log my car consistently. My setup currently is as follows:

91 GSX - ported 14b, stock ported o2, stock ported wastegate and BR UICP. Everything else is stock (ie pump, injectors, fuel rail, head, bottom end)!

Now when reaching 4500 rpm the logger reads max air flow hz of (I believe) 1606 all the way through my shift point. What's the max air flow hz the stock hacked 1G mas can handle?

Also, when reaching 5000 rpm or higher my Injector Duty cycle shows close to 96%-97% and I am wondering if that's normal with the few mods I do have and boost set at 12 psi?

The Car has gone a best of 14.2 on 100 octane and 19 psi if that matters!

Any help is appreciated!

1) The logger will display a maximum of 1606Hz. Your MAF will give signals much higher than this.

2) Seems like the car is getting a crapload of air with DC 95%+. That UICP and ported turbo is doing it.

Get some bigger injectors and a pump with a SAFC.

-M

 

[kpt4321]

Getting really high airflow (and hence fuel flow) is usually indicative of boost leaks. Pressure test that puppy.

 

[Benji]

Originally posted by kpt4321
Getting really high airflow (and hence fuel flow) is usually indicative of boost leaks. Pressure test that puppy.

Hey thanks, I never thought of that.

What's a good pressure tester available for us?