this was lightly being discussed on a local forum here and we figured we would see what some of you guys thought about the subject. what we were discussing was the pro's and cons of having a dual walbro set-up vs the aeromotive a1000 vs the bosch 044. being that i have no presonal experience with anything other than single walbro 255's i can really argue about it too much. i can only go on what i have read on the interweb.

so lets have and educational discussion on fuel set-ups..lets say its for a 500-600whp FI car. what are the pro's and cons of each set-up? are there better set-ups than what i have mentioned? and should cost be taken into consideration? yes i have researched adn i have some great info saved on my computer but i really think a thread like this could help some ppl that are new to this...my self being one! so let discuss!!!

 

my thoughts are with the dual walbro's, they can be found often local and cheap if one were to go out, they fit in the stock tank with the dual pump kit, good to around 950whp, cost effective compared to a sump install and a pump for other brands listed. imo dual pump kit. sorry i was looking at t1's catch can's and thought he was carrying the dual pump kits.


Modified by boosstboy at 5:32 PM 12/16/2007

 

got a link to the t1 kit? i have seen full-blown's kit and it is what i am leaning towards but im still interested in learning more.

what about over heating issues with any of them? i have heard of the a1000 doing it but then i have heard its great. my main concern would be on long trips with spirited driving

 

For 5-600 whp a single walboro on stock lines will cut it but for safety dual walboro's would be more than enough. If you are sumping the tank then a single bosch will get the job done and wont require a pump controller or anything to drive it on the street.

 

i will be doing a bosch intank for my current set-up. i'll post pics when i do get to it.

 

keep in mind if you plan on running high fuel pressure (lots of boost-- 1:1) the efficiency of the walbro pumps goes down the drain.

 

So, would an Aeromotive (A-1000 or Eliminator) be accepatable for daily driven action(>15miles one way)?

 

looking at the charts on the eliminator it falls off pretty good too how are you guys running these pumps with 35+psi?

im saving up for a pro series i hope its enough...looking at the charts on that it doesn't seem to do to well at 120 PSI of fuel press. am i missing something here?

 

I run an eliminator and made close to 800 at about 36 psi. The other night at the track she hit 47 lbs and the fuel still looked good. No controller. The question is will an Aeromotive pump live in a dd?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boner_Ben &raquo;</TD></TR><TR><TD CLASS="quote">For 5-600 whp a single walboro on stock lines will cut it but for safety dual walboro's would be more than enough. If you are sumping the tank then a single bosch will get the job done and wont require a pump controller or anything to drive it on the street. </TD></TR></TABLE>

good point. i do want more fuel set-up than is needed as of now since i know my history and i am sure i will be going bigger later on. how far will dual walbro's go with -8 feed to the rail? what about the other pumps in the same set-up.

in my case i will be running most likely mid 20's on the boost side of things..whatever it takes to get into the 500whp range

are you saying the aeromotive requires the fuel controller for repeated street use? i have seen several ppl say this but i also hear otherwise.

 

I have seen a few 600 whp setups on a simgle Walbro.

 

1qwikEF on here made 670whp with dual walboro's, thats the only person I know running that fuel setup. As far as the aeromotive pumps, I know people that have driven on there pumps for years with no problem and others who have went on a street tune and burnt them up so I guess that makes them hit or miss. A pump controller isnt that expensive though ~$275ish. Its purpose is to run the fuel pump at less voltage under a set rpm.

 

yea they are def affordable but thats one more un-needed cost if other set-ups can do the same thing for less money. i realize these pumps are for racing...not for driving around town....but thats why this thread is here to find out what can be used for those situations. a 500-600whp car is def not hte best daily but it sure is fun!

how many here have had expereince with the bosch and the aeromotive?? what are your thoughts on them....also...has anyone here actually driven long distances on your aero a-1000 or any other set-up?

 

subscribe!!!

 

i run a eliminator pump and i drove my car on for almost two years before i stopped driving it and it worked fine just noisey as hell inside the car.i just played it like a girl and turned up the radio

 

no controller? what type of driving are we talking about here? to the gas station for munchies or to work 45 minutes away?

 

i drove it where ever to work 10mins away to the shore 45mins away to the streetraces 35mins away and it ran most off the night from spot to spot.i even drove it for a straight run to the a track 1hr and half away and it still works fine
oh and no controller wired to a fuse to the battery and a toggle switch.

 

cool deal then....thats one good a1000 story. where are the rest of you guys at?

anyone got any flow charts thats how what any of these pumps flow at different pressure levels

 

this one was posted over on the dual walbro thread:

 

I havent used the aeromotive or the dual walbro set up, but I have used the Bosch 044. And for 500-600 hp that is plenty of pump. And you dont have to sump the tank (well I didnt and had no problems at all) I ran -10 feed and -8 return with it. Drove it around in town in stop and go traffic without any problems. I did start to max the pump out at between 700-725hp. So in my opinion for 500-600 the Bosch is a great pump.

 

this is from jayracing.com..they got some good prices too!

 

When I had my b series in an engine dyno I had the a1000 pump.. It sounded so bad i thought it was broken..

I wanted to try e85 and welded a Y togerter and conected 2 walbros.. 1 flowed 3,6liters per minit as I recall and 2 around 7,2 both at 5bar(75psi) fuel pressure.. I had a holly fuel filter and an 6 pressure and return lines. i did not test the 044 but my tunes had before and it was just as good as the walbro only it can take a higher fuelpressure.

I would not trust my $20000 build with a $75 walbro If the engines actualy needs 2 pumps and one breakes the engine still runs butt will go lean ones you flor it..
i would prefer 1 big pump.. I went with a SX pump now but I have not started it up yet.

 

so how does anybody make any power at 120+ fuel press? every pump chart ive seen fails in that area.

 

The question to ask - why run such high fuel pressure? Few injectors are rated for very high pressure, let alone like it. An increase in pressure leads to an overall reduction in flow due to an 100% increase pressure leading to only ~40% increase in overall fuel flow.

The thing is with injectors doing the metering and a FPR that's striving for a set psi, a dual pump will only go lean once you've go beyond what the single good pump + dying pump can provide. Dual check valves means you'll never have less than one pump can provide.

The best thing to do, which supports even more HP as shown in the graph above, is to run a constant fuel pressure, and run a pressure switch. If you have 2 pumps and one starts dying, any drop below that base psi will be met with a buzzer or a complete shutdown. BTW with something thats making 600+ whp, its usually tuned to the edge. *ANY* pump problems (single or dual), can lead to catastrophy. A single pump just means its easier to see.


FYI Rarely will a pump go from good to dead in even an hour. And for that matter, Walbro says most dead pumps are from sediment in the tank, water, etc. Few people will use stuff like iso-heat to remove any condensation, let alone flush their tank.


Modified by HiProfile at 1:23 PM 12/17/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SwappedTURBOegg &raquo;</TD></TR><TR><TD CLASS="quote">so how does anybody make any power at 120+ fuel press? every pump chart ive seen fails in that area. </TD></TR></TABLE>

120 fp would be

80 base with 40lb at 1:1
70 base with 50lb at 1:1
90 base with 30lb at 1:1
100 base with 20lb at 1:1

something does no look right to me