94m6Z28

im looking to upgrade my stock fuel system and ive got it down to two options

A) aeromotive lt1 fuel system kit, http://www.aeromotiveinc.com/product...sub=3&prod=171

B) go to a walbro 255 INTANK, get an aeromotive FPR http://www.aeromotiveinc.com/product...ub=14&prod=177 and a new filter of some sorts

my only concern is with the aeromotive kit, and getting rid of the intank pump all together and just using the hoses to draw fuel out of the tank.

how much will ither system be able to support??

slowpoke96z28

iTrader: (2)

how much power do you plan on making? i would go with the first kit probably because the pump is easier to change in the future. as long as you keep a decent take level, the pump wont run dry. you could even modify the tank with some check ***** to make sure fuel only flowed out of the tank.

94m6Z28

untill i build the eng. ill be looking for 450rwhp *hopefully*
check *****? i dont understand this..could you please explain??

Lonnies Performance

iTrader: (16)

I can set you up with a complete fuel system along with dual intank pumps.
This kit is 1000+ rwhp capable, but can be used at any power level. This kit is quiet, outflows the A1000 pump by a large margin, & does not require a pump controller.

I do not like the Aeromotive conversion because you cannot properly feed an external pump with small factory style lines. This is a poor method as external pumps should have large free flowing lines to the pump... such as a -10 line. That is approx. 4x the area of the stock line. A restrictive inlet can cause pump cavitation which is bad for the pump as well as detrimental to fuel flow. You may also not be happy with the noise as these pumps are loud.

Based on your power level, you may not need either of these. If you never plan to go above 500-550rwhp, then a single intank is sufficient. The racetronix kit with plug-n-play wiring harness is a great kit for this application. There is no need to use a huge fuel system at this power level, unless you are planning future power upgrades as well.

94m6Z28

with in a few years ill be looking to "up" the power to say the least. you dont think i need to upgrade it at all? even with 44's?..only real reason im really asking is becuse the sts site advises the use of bigger injectors and a 255 walbro *not using an sts kit mind you but i thought it would be a good place to get some ideas of what is needed to support 7-8psi*

slowpoke96z28

iTrader: (2)

the check ***** would be for the tank. i was figuring the kit came with parts to modify the fuel tank sending unit or tank. like lonnie said, the whole setup is asking for trouble if you use a -4(nominally at best -6) to feed that external pump. basically, you are asking the pump, which is good in its own right, to suck fuel through a straw. basically the pump would be suffering from asthma. if you or anybody you know has asthma, you can see what lonnie was talking about. now if the kit came with like -16 all the way to the pump inlet, you could put a check ball at the tank outlet so that fuel wouldn't flow bank to the tank and make the pump loose its prime. normally guys would sump the tank and make tank outlet be at the front and back, so fuel would be pushed under hard acceleration toards the pump, and the check ball would close under hard braking, but could flow to the pump through the front outlet. its easier to push fuel through a -4 or -6 line than suck through it. thats why it works for intank setups, but not external pumps. if the aeromotive kit doesnt address the supply side, i'd just get the intank one. i was thinking the kit did, thats why i recommended the external setup at first.

94m6Z28

so a holly or walbro 255 INTANK would be my best bet for using stock lines??
a 255 will be able to handle my power goals right? *bolt ons, 6-7psi...hopefully 420-440rwhp range with a wide band tune*

Lonnies Performance

iTrader: (16)

Yes a single intank 255 will be fine.

slowpoke96z28

iTrader: (2)

what about 850hp to the tires? would the regular racetronix kit get it done?

94m6Z28

thanks

Nasty N8

iTrader: (33)

No he is asking for 450rwhp for 850 you will need a dual Lonnies/Racetronixs Pump assembly coupled with one of our Stage 3 street kits will be the perfect setup for you.

Nate

slowpoke96z28

iTrader: (2)

that looks like it should be enough. on your(nasty n8) website, i saw a couple different prices under the stage 3 street kit. which one comes with lonnie's duel pump sending unit?

94m6Z28

one last question. a walbro 255 would be exactly the same as a holly 255 correct?

slowpoke96z28

iTrader: (2)

i think they are. i cant remember now for sure, but i think they are. i put a walbro pump in my 1994 LT1 and i THINK i ordered it from holley.

94m6Z28

ah, i ment in the way that if i cant get a walbro as soon as i can get a holly...there should be no diff in performance??

slowpoke96z28

iTrader: (2)

that's what I meant. I think they are made on the same assembly line with the same parts.

94m6Z28

ah, i see

thanks guys