other then the walbro.... i have the walbro 340 and under boost my FP drops to 44 PSI

new stock FRP
new Fuel filter
MSD boost referance Adj. FPR

and the FP still drops off

so today i replaced the hose in the tank thinking that it kinked........ still same damn thing

any other brands other then walbro ??? mine is only 8months old and its dead already

 

I'm using the Racetronix harness and 255 pump and it is enough for around 15psi boost on my 355 (11.2 @127). MIght try one of their harnesses that feeds directly off the alternator which will give you a little more voltage.

 

thanks i just orderd the wire kit and new pump from Thunder.... i hope this stops the problem

my base is 50 psi and it drops to 44PSI when it should go up to ~70 under boost = not safe

 

Bosch 390/420lph pump will do the trick.

 

holly hell

i got a new walbro and rewire kit from racetronix.

try that first.... walbro should hold a V6 i hope lol

 

Holy crap!! You have a link to a vendor for this pump???

 

Yeppers. They just become a sponsor on On my site and are offering a VERY NICE PRICE on this pump!!!!

I run one of those pumps on my Mustang it works great.

 

how does a inline pump flow more then the feed pump

thats a huge pump

 

LOL. I've used the Walbro 255 inline and also an Aviator pump (believe it's approx 271lph) and neither of them worked very well for me. The car demanded a bit of fuel and when I got into boost pretty heavy , the fuel would get sucked out of the basket and then the fuel pump would then burn itself up since it's fuel cooled.

I read on one of the Vette forums that you can run the Bosch 390/420 either inline or in the tank (with a little modification). I run a sumped tank and it works great for me

 

i use the 255 intake pump........

 

Don't be scaref of the Bosch 390/420. It does flow some fuel

 

if this walbro don't work i'll hit it up

 

I replaced a working, but anemic, stock pump with the Racetronix 340 & alternator rewire kit thinking I wouldn't need the T-Rex in-line anymore, and it all works, but doesn't keep the pressure under boost - I was real dissapointed. If I turn on the in-line, then I have all the pressure I need and it works great. That racetronix pump was a waste of money, in my situation, anyway.

 

hope it holds for me

 

None of you have tried a dual intank pump setup? On stock lines it will easily support 700rwhp.