2 different Walbro 450 - F90000267 F90000274

[deboelduro]

what turbo are you running? How much boost?

Running a old Fp 3575 @ 42psi

 

[NOSLO2PT0]

Running a old Fp 3575 @ 42psi

Looking at your info and log, I would think that 76lb/min would be a little more than 661whp. You auto or 5spd? Airflow numbers dead on?

 

[deboelduro]

Looking at your info and log, I would think that 76lb/min would be a little more than 661whp. You auto or 5spd? Airflow numbers dead on?

The 661whp I made last year at only 37psi flowing 66.1lbs @min. The car is running different set of cams and 5 more psi of boost. Here’s a pic of last years log with airflow well calibrated. 5spd car

 

[jed344]

Are you logging fuel pressure?

 

[deboelduro]

Are you logging fuel pressure?

I don’t have any more inputs on ECMLink to log it. I been running a aem digital fuel pressure gauge inside the car. I usually record all my pulls with the camera facing the gauges and fuel pressure is rising as it should

 

[Vegas Smith]

Just put your fuel pressure input on a switch with your wb on the other end. Switch between inputs if you want to check fp on a pull.

 

[deboelduro]

Just put your fuel pressure input on a switch with your wb on the other end. Switch between inputs if you want to check fp on a pull.

I thought of that but how would I check my afr’s on a pull to make adjustments ? The gauge tells me the pressure but switching back and forth on a pull would record either wideband or fuel pressure not both correct?

 

[Vegas Smith]

The reality is you only need to check fuel pressure maybe once or twice ever. It’s a diagnostic tool not used for tuning. Once I verified my fp is on point I never log it after that. It’s totally not needed but it’s available by switch if I need to verify it on a separate log.

 

[jed344]

That's not a bad idea, But i'm guessing you are at the limit of that pump. Realistically i see the 525pumps even the ones without check valves maxing out around 650whp on mustang dynos. So going off ur lb/min you should be right there.