Any of you guys know or have a close ball park estimate on just about how much boost I'll be able to run before maxing out my stock flex fuel pump with 95lb Bosch injectors on pump 91 if I'm already making 430 to wheels on motor? I know the whole deal that the flex fuel is supposed to be good for around 550-600 but I'm curious about how much boost is going to put me around that limit to be able to run until I get the bigger fuel setup all swapped in. Setup is a stroked 404 10.1 fully forged heavily ported cnc'd 243's comp 236/242 .600" 113 circ d trip disc 3200 pt-88 4"dp 50mm bov 44mm wg 3.5" coldside piping

So what do you guys think?

 

8-10psi would be my guess, you really dont want to find out the hard way though.

 

That's exactly why i figured I'd get a few guesstimates because that's the last thing I want to do!! I guess I'll just plan to throw in springs in for around 4-6lbs if I can and let my tuner gradually ease into it with the boost controller to a safe power level until I get the extra fuel, or would you think it'd be safer to just change spring rates then trust the boost controller to lock down what boost I want to sit at? I'll be running a TruBoost controller

 

I wouldnt get into boost at all until I knew I had an adequate fuel system. Why risk it?

 

Swapping to an aftermarket pump is so cheap and easy I would just swap it now and not ever worry about the fuel pump not keeping up.

 

I already have a 340 and a 450 I was planning to run a dual setup with I was just planning to put them in a ricks bucket is why I was going to wait and just run low boost off the FF pump and the 95lbers but you guys are making me skeptical about it, maybe I'll just swap in the AEM or walbro to stay more on the safe side then just change it up how I planned when gather up the last few extra parts I'll need to complete a return style setup.

 

You could always put a BAP on it.

 

BAP, expensive.