2011 Escalade 76mm BB Turbo running Meth. I know they say these pumps will Hold to around 600-650RWHP. I think I running out of pump after extended WOT runs I start with 60psi idle but start dropping to 35-34psi A/F is still good on wideband? Running 8-10 psi 50# injectors.

What would be best upgrade pump? Also heard you could run a boost a pump off Flex pump with a bit of trouble? Not sure if its worth it?

 

I believe the AEM 320lph pump is supposed to work well. The flex fuel pump is rated at about 200lph just to give you an idea.

 

walbro 400 or 450

 

Can those pumps work with returnless fuel system complete drop in?

 

Flex Fuel is 290lph not 200lph. Yes people are running the walboro 400-450. It's not a direct fit but they will work.

 

I'm on my third stock flex fuel pump (third was a warranty replacement for the second) with a Kenne Bell boost a pump. If/when this one dies, I'm going Walbro 450, selling the BAP and never looking back.

 

thanks I think I'm leaning the same way.

 

Take that boost a pump bullshit off and it will last a lot longer.