aeromotive afpr

[justinhill98gst]

I picked up a aermotive AFPR today and I have a few questions. Im running a 255 walbro pump with 550cc injectors, and i know for a 2g base fuel psi is 43.6psi (off vfaq.com) im going to be running 18 pounds of boost and im running bc 272 cams(if that matters),whats a safe fuel pressure to run at? im lost.. im going to logging and i have a EGT to manage (still saving for wideband) i never messed with fuel psi before i'm tuning with a SAFC. Can some one kinda give me an idea what to do after having it all installed. sorry i'm a noob yet.

 

[92awddsm]

Keep it set to the stock pressure. If you are a newb, you are not ready to tune around fuel pressure that is not stock.

 

[My1GLaser]

There's really no reason to run higher fuel pressure with that boost and your inj, so just set it to 43-44 psi.

Sometimes higher pressure is run to compensate for too small of inj. Check out the calculator part way down to see what diff pressure does. RC Fuel Injection

Running 52 psi would turn the 550s into 600s if you needed the headroom and wanted to run up to 24-26 psi. Road Race Engineering's Eclipse Fuel Delivery Upgrades Check the table part way down to see what inj sizes are recommended for diff boost levels.

 

[donniekak]

Run the stock fuel system until you get a wideband, or at least a logger.

 

[tsiAWD91x]

There's really no reason to run higher fuel pressure with that boost and your inj, so just set it to 43-44 psi.

Sometimes higher pressure is run to compensate for too small of inj. Check out the calculator part way down to see what diff pressure does. RC Fuel Injection

Running 52 psi would turn the 550s into 600s if you needed the headroom and wanted to run up to 24-26 psi. Road Race Engineering's Eclipse Fuel Delivery Upgrades Check the table part way down to see what inj sizes are recommended for diff boost levels.

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That is a GRRREEATT link BOOKMARKED!!!!!!

btw thanks for sharing that bro, to some of us those formulas are golden!

 

[justinhill98gst]

So did i even need a afpr? i though it was a steal for 100$ for a brand new areomotive with all lines? i plan to up the boost later on. I do have a logger.

 

[DyNamiC]

With the 255 you need the AFPR or you risk overrunning the stock regulator.

 

[My1GLaser]

So did i even need a afpr? i though it was a steal for 100$ for a brand new areomotive with all lines? i plan to up the boost later on. I do have a logger.

Yeah thats a great deal. I think mine was $200 with -6AN SS lines & Earl's fittings.