Max Fuel Pressure I can run on 550's

[Generation X]

Just like the topic say guys, I was wondering what is tha max amount of fuel pressure over stock that I can safely raise on my Fullthrottle AFPR if needed with a walbro 255lph, 550's, S-AFC etc.? Thanks!

 

[92awddsm]

Why would you want to raise the pressure? I dont know what your goals are but you should be able to extract a fair amount of power from the t-28 and 550's at 40 psi. Now, if you switch to a 50 trim or eqiuvilent, I wouldnt even try to tune anything over 55psi base fuel pressure.

 

[Generation X]

I run nitrous with my B28 @ 19 psi and a 75 shot, and since the weather is starting to get cooler I may need to squeeze a little more fuel out of my 550's. I mean I might be better off just swapping the 550's out for 650's or 660's I'm not sure. But If I could get a little more fuel out of my 550's without having to do so that would be nice. That's why I'm asking. Sorry if I wasn't more clear.