Ok, so i am upgrading my fuel pump for a turbo kit. I got a walbro 255lph hp intank pump, and I am planning on boosting about 20psi. Now, I have this other inline walbro lying around, its also rated 255lph, i assume hp too since it was used with an fmu previously. So i was thinking that i could take out the stock fuel filter and place the inline there on the firewall, and run a hi flow inline filter after it before the fuel rail.

My basic idea behind this, is that it would help with the work load of pushing fuel to the rail. rather than the intank pump push from the tank all the way to the fuel rail, it would only be pushing from the tank to the pump and then the inline would pick up the rest to the fuel rail. not that i expect it to gain any hp out of it or anything. Just wondering if this is just a waste of a fuel pump. What do you guys think?

 

You will most likely be just fine, might create more problems for yourself by adding the second pump. Just monitor your fuel pressure under boost (on the dyno)... if you lose fuel pressure under high boost at high RPM you most likely need a bigger pump or two pumps.

Also depends on your fuel management, adding the second pump may create too much pressure, and cause you to run rich, but if you can lower the duty cycle from your injectors you will probably be alright.

I would just stick to the Walbro 255 until you notice a drop in fuel pressure.

 

anyone else?

 

since you gave no idea on how much power your car will make its tough to answer your question.

 

intank pump should be fine 366 hp@20 psi with 255lh pump and 1000cc inj.....

 

so are you runnin the warlbro 255 intank with stock injectors and thats it?

 

you should be fine i ran my integra with stock injectors first , factory pump and inline. Now i have a civic with the 255 and the in line,dsm450 injectors. ido have hondata and it was tuned with both pumps.but on the first pass un tuned on 8psi with a small turbo it made230@whp

 

is your return line big enough to handle the bypassed fuel?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SIK IN DA HED &raquo;</TD></TR><TR><TD CLASS="quote">so are you runnin the warlbro 255 intank with stock injectors and thats it?</TD></TR></TABLE>

880cc injectors and a walbro intank