nothing beats KNOWING that your fuel system is up to the task.

maybe the thread should be retroactively re-titled.... "Fuel Pump Speculation."

the Honeywell #4040PC100G4D digital pressure sensor will answer the fuel system question.

buy it, screw it into the port where you have the near useless neat looking analog pressure gauge. hook it up to your datalogit and go for a drive. case closed.

then you can move on to the next issue...

howard coleman

Good point =)

Does anyone have a pic of their 'hotwired' pump-to-battery setup?

What do you want a picture of? The relays or..? You can see the pump-end of my setup in that picture I posted. Drilled a hole in the top of the fuel pump holder thing, and epoxy'ed the four wires through a piece of hose to keep them from chaffing and stuff.

4040PC100G4D is no longer active. This information is provided for post-sale support only, this product should not be specified into new applications.

http://catalog.sensing.honeywell.com...N=4040PC100G4D

So in your opinion.... which is the best set up? a twin walbro or one bosch 044.....

This will decide what i am getting... the setups will cost me exactly the same... so......


Thanks

George

Did you miss something back there?
The Bosch 044 flows slightly more than the Walbro 255.
In my book, they are equals.
Thus, one Bosch 044 does not come even close to flowing with a pair of Walbro 255's.
I trust the Bosch quality a LOT more than the Walbro.


-Ted

Just get an Aeromotive :)

Honestly, ive heard intirely FAR TOO MANY BAD things about the Aeromotive pump. Actually there arent many things. Just too many instances of failure being reported as I research to make me feel comfortable with it.

Bosch seems to be ideal when it comes to quality and performance however everything I see (when it comes to supporting 500RWHP) shows me theres a need for two pumps just like the Walbro.

Speaking of Walbro I dont think that there would be a problem with performance if there are two pumps on each feed (primary and secondary respectivly). They would operate under max capacity for each application/rail and it seems that type of performance is what people are attracted to which would account for there widely accepted usage.

The one thing I have seen toutched on here however not expanded is the MKIV Supra Pump. I would like to get more details from people who know more about the opperation of this pump. Im not to concerned with reliability seeing as it is a factory part for a vehicle that is regularly pushed to rather large HP and flow numbers. What I would like to see ar some of those numbers under multiple boost levels and HPs.

Ive decided on an alternat pump setup if I dont hear or read what I want to from the MKIV pump however I think its far more inviting to run a simple intank application.

I'm currently running a supra pump and just picked up a SR ultimate (apexi BNR32) pump. I plan to hotwire my pump to the battery to get the voltage up to 13.5v or so. I made the switch based on the following flow #s I found online (the 3 flows correspond to 65 psi, 70 psi, and 75 psi):

supra tt pump at 13.5v: 66 g/hr, 59.5 g/hr, 53 g/hr
SR ultimate (apexi BNR32) at 13.2v: 77 g/hr, 72 g/hr, 67 g/hr

I figured 40 psi base fuel pressure, 15 psi pressure drop, and i will be running 10 to 20 psi, so I was most concerned with flow at the above pressure values. This may be overkill for my current application, but it certainly leaves me room to upgrade :)

Let me know how this install goes.. I am running the supra pump and I want enough fuel for 600hp (fuel alone, race type of course) - I can currently push that amount of power with my pump + methanol but not on pump alone. Let me know what you come up with.. and price, etc.

Thanks
-Darren-

WELL ! 2 more cent worth, I have been running an SX 1000 pump with SX fuel filter, and SX FPR for 12yrs. on a N/A V8, never had any trouble with fuel system, admittdly not a lot of flow but works fine for me. NOW! I also run a SX 1000 pump,filter,and FPR on an RX-7 FD engine hot wired of course, been there for about 5 yrs. no trouble. For what its worth talked to SX engineers< in Missouri, they said they make the fuel system parts for Aeromotive, ever puttem side by side looks like they came from same CNC machine, not silly stuff like FINS and ETC.

You must be very lucky.
I've seen too many SX fuel pumps die on mostly race cars.
In fact, at one point, SX was rotating "cores" because returns were too frequent.
Their FPR's are great, but I would never run an SX fuel pump in my car due to my experience.


-Ted

sorry to bring up a dead thread but I want to make sure that I have enough fuel for my hbp single setup. Taking what ted says about the 044 fuel pump being able to support a little more than a walbro 255 and knowing that the walbro is good to 490rwhp as shown to us by jrat then a single 044 should be fine for around 500rwhp right?........I guess I should still run the boost a pump with it just in case I go over the 500rwhp mark.

edit: we need a sticky with the specs of each fuel pump. It seems like alot of people haven't really found the safe limmit for any of these pumps. Seems like years ago it was "common knowledge" that the walbro was only good to about 350-400 at the flywheel and now it seems to be alot more than that. Would be nice to have a fuel system setup sticky for 300, 400, 500 etc... Anyone up to the task :) I would have got the a1000 but I've heard alot of bad things about them going bad if your feed line is too small witch mine are -6an witch I'm sure is too small for the A1000.

Just twin the walbros use 40 amp relay and direct feed from the battery use 30amp fuse and switch the relay with your computer. Use one relay per pump. I belive boost a pump acts like a restriction.

two pumps huh? I kind of wanted to get away from that because if one fails you'll go lean and detonate. Also I've got a fuel cell so no more intank :) I bought a bosch 044 along with it because I've heard they are a bit more reliable than the walbros. I guess I could run dual 044's? I do run my fuel pump directly off the battery though using a bigger wire with a 30amp relay and fuse. What do you think?

I forgot the fuel cell the bosch is problly a little better but if your running a cell there are a ton of pumps that will work. There expensive though. On my t11 im running holley black to the front tank and belt drive pump from that tank with 10 an feed line but its alcohol! I have had friends run booster pumps and they all took them off becouse of flow problems.:sadwavey:

while we all don't have the same requirements and something that works for me might not work for you...

i am very happy w my fuel system. since 05.

i run a cosmo/denso pump w a Kenne Bell Boost A Pump. i run 850/1600s and before adding 1200 cc/minute of methanol ran them up to 89% duty with absolutely no pressure fall off.

since i digitally log fuel pressure i KNOW that everything was fine.

i run the BAP at a 20% voltage gain to my pump only in boost.

i run two T04s that put out over 80 pounds per minute of air which is similar to a GT42... but at 20 psi.

if you run more boost that might be a greater challenge to fuel delivery.

i do love my system. i have almost forgotten it.

howard coleman

the only reason I didn't go with an a1000 is the fact I've heard (of course this may not be correct) but there is problems with reliabilty especially if you have a smaller -6an feed line. I should have made all my fuel lines -8an but I did the fuel setup before I desided to go all out. I know the bosch is better about this and it's dependable. Are there any other inline fuel pumps out there that are dependable with -6an fuel lines?

thanks guys for the input!

that speaks volumes, right there.

ps. id love to see a test of a 30,000mile bosch 044 pump

These reliability issues go for any pump...

Take a FD fuel pump, now lets tie some -2 line to it and run that... or how about some -4 line.... lets restrict the crap out of the pump and see what happens.

The A1000 has a -10 inlet and a -10 outlet
My eliminator pump (daddy to A1000) has a -12 inlet and -10 outlet.... but I'll run a -12 in and a -8 out. I think stepping the pump down one size is ok....

People will take the A1000, run a -6 into it, and a -6 out of it.... now this pump isn't getting the fuel it should be and it's trying to pump what it has through a small hole. Runnign -8 out shouldn't be a problem.. but -6 is just too small and the pump will capsize.

I know people that run these pumps all day long without a problem, using the correct line or one size smaller.... some with over 25k-30k miles on them, still running strong.

so I guess my question is, what pump...errr... what high performance (500+ capable) inline pump will be ok with my -6an lines? Or is that like asking who is not gay in a sanfransisco bath house? lol

Two questions, Howard, so, you're running twin T04's with just a cosmo/denso pump and a K. B. boost-a-pump, but on what engine set-up?

Also, do you have pics of this set-up?

Thanks,

J