Looking for some insite. I Have an 2003 Silverado SS D1SC approx 14 psi boost/3600 stall/FLT lvl 7/etc.. and other supporting mods. Currently have a single Walbro 255lph pump in tank and need to upgrade. First looked at the 450LPH pump but see some posts saying there are problems with stock fuel line size/stock regulator, etc... Are there any recommendations on how to properly upgrade my fuel system to supply the fuel I need? Thanks.

 

Im kind of in the same boat man, been looking around gathering information.

So far what ive gathered is its best to run -8 and -8 lines, maybe a racetronix hot wire kit to keep the amps up on the pump. as for regulator i think a man should ditch the stock one and upgrade, looks like everyone is running aeromotive but i can seem to find one that has -8 inlets/return.. as for the pump ive only been able to find e85 450s i dont know if they make one for pump gas or not. i think i might go with a 400, looks like they are good up to 800 rwhp maybe more lol..

but thats all i have found i would like to know more also.

 

I'm running a D1SC 12lbs with a single walbro 450 in tank pump 82lbs injectors stock lines 13129 aeromotive FPR meth kit upgraded hotwire kit for the wiring to the pump no problems and I've run the tank as low as 1/4 with no issues

 

is this the hotwire kit you have??

 

I'm running the one for the 98-02 F-Bodys the 04 up trucks have a different sending unit and the main plug is different

 

A e85 walbro 450 works just fine on gas. That's what I have also.

 

Stock fpr or aftermarket?

 

its a aftermarket one fuelab anything over a 255lph pump will overpower the stock FPR

 

Might be able to get away with an AEM320. Anything more and you will need a better fpr and probably fuel lines.

 

Aftermarket.