Fuel pump for 500-600+RWHP
- Thread starter brock1949
- Start date
mrweelr
New member
Re: Fuel pump for 500-600+RWHP
I have a Walbro 255HP in my Sy and an MSD Fuel Pump Voltage Booster (#2350) waiting to go in the truck. My understanding is this setup is inadequate for my new motor w/75# injectors, so I'm planning to install two in-tank Walbro 255s wired to run together. I saw some pics of this setup and supposedly it will support 1000HP, but I have no idea where to start. I guess the fuel return line also has to be upgraded for this. Anyone have any more info on the dual-Walbro solution?
I have a Walbro 255HP in my Sy and an MSD Fuel Pump Voltage Booster (#2350) waiting to go in the truck. My understanding is this setup is inadequate for my new motor w/75# injectors, so I'm planning to install two in-tank Walbro 255s wired to run together. I saw some pics of this setup and supposedly it will support 1000HP, but I have no idea where to start. I guess the fuel return line also has to be upgraded for this. Anyone have any more info on the dual-Walbro solution?
Re: Fuel pump for 500-600+RWHP
A few trucks up here (at least 3) in Canada are running the dual walbros with the stock modded computer and 84lb injectors, and with all of them dynoing over 525rwhp. I believe they are wired to run all the time with a new feed line and the stock fuel line as the return and if one dies the second will not run so you don't run the chance of leaning out the engine.
Nolan spent alot of time tuning the idle and I think that it idles smoother than it did stock. If you are looking for info talk to Nolan, guaranteed he will put you in the right direction.
A few trucks up here (at least 3) in Canada are running the dual walbros with the stock modded computer and 84lb injectors, and with all of them dynoing over 525rwhp. I believe they are wired to run all the time with a new feed line and the stock fuel line as the return and if one dies the second will not run so you don't run the chance of leaning out the engine.
Nolan spent alot of time tuning the idle and I think that it idles smoother than it did stock. If you are looking for info talk to Nolan, guaranteed he will put you in the right direction.
Maxtor
New member
Re: Fuel pump for 500-600+RWHP
RGL - Do you have any idea how they did this, or can you refer us to someone who does know? This is the single biggest problem with running 2 pumps in the tank... you don't know if one isn't working which could lead to significant problems very quickly at WOT.
I am very curious to hear what can be done about this issue.
Also, I agree the stock line is sufficient for at least the return. I have the stock lines/fuel rail and have never had a problem with the ATR in tank double pumper and 84lb. injectors.
RGL said:
RGL - Do you have any idea how they did this, or can you refer us to someone who does know? This is the single biggest problem with running 2 pumps in the tank... you don't know if one isn't working which could lead to significant problems very quickly at WOT.
I am very curious to hear what can be done about this issue.
Also, I agree the stock line is sufficient for at least the return. I have the stock lines/fuel rail and have never had a problem with the ATR in tank double pumper and 84lb. injectors.
mrweelr
New member
Re: Fuel pump for 500-600+RWHP
Here are some pics of the dual Walbro setup:
http://gallery.jsmanufacturing.com/main.php?g2_view=core.ShowItem&g2_itemId=5678
Doesn't look all that complicated, but sure would be nice if someone made a kit with a braided supply line and all necessary fittings. I'd be all over that.
Here are some pics of the dual Walbro setup:
http://gallery.jsmanufacturing.com/main.php?g2_view=core.ShowItem&g2_itemId=5678
Doesn't look all that complicated, but sure would be nice if someone made a kit with a braided supply line and all necessary fittings. I'd be all over that.
brock1949
Its alive!!!
Re: Fuel pump for 500-600+RWHP
so someone help me out here, a walbro 255 ($110-120) alone isn't going to cut it past 500rwhp and it takes a pump booster ($225+) in order to get the pump to cover it so $335+ dollars to run a good pump, but harder than its meant to be run.
Or i run a A1000 pump rated for well over what i need, rated for 2000hours pump life 40k + miles min (also talked to the aeromotive and the a1000 was redesigned and flows even more now) for 299
Or i run a dual Walbro setup with 2 255's figure 220+ dollars..This doesn't sound bad at all.
Knowing if the fuel pump dies i loose a built engine and probably a turbo if played my cards right. With that i'm having a really hard time running the pump booster on a walbro when i have to buy it all right now anyways, i have a walbro 190 in the tank from when i was running a 6lb blower setup couple years ago so. I know tons and tons of people run pump boosters on walbro's but i'm just uneasy on it.. can a walbro running at 17-22 volts really be more reliable than a properly installed A1000? Now back on the dual 255 setup.. i'm interested, seems like a win win
so someone help me out here, a walbro 255 ($110-120) alone isn't going to cut it past 500rwhp and it takes a pump booster ($225+) in order to get the pump to cover it so $335+ dollars to run a good pump, but harder than its meant to be run.
Or i run a A1000 pump rated for well over what i need, rated for 2000hours pump life 40k + miles min (also talked to the aeromotive and the a1000 was redesigned and flows even more now) for 299
Or i run a dual Walbro setup with 2 255's figure 220+ dollars..This doesn't sound bad at all.
Knowing if the fuel pump dies i loose a built engine and probably a turbo if played my cards right. With that i'm having a really hard time running the pump booster on a walbro when i have to buy it all right now anyways, i have a walbro 190 in the tank from when i was running a 6lb blower setup couple years ago so. I know tons and tons of people run pump boosters on walbro's but i'm just uneasy on it.. can a walbro running at 17-22 volts really be more reliable than a properly installed A1000? Now back on the dual 255 setup.. i'm interested, seems like a win win
Re: Fuel pump for 500-600+RWHP
Now you got me thinking about this Jeremy. Might as well do it now while the bed is off. That A1000 set up looks pretty good. Summits got them for a decent price.
With this dual Walbro set up you would have to splice into the existing pump so they run together????:
mrweelr said:
Now you got me thinking about this Jeremy. Might as well do it now while the bed is off. That A1000 set up looks pretty good. Summits got them for a decent price.
With this dual Walbro set up you would have to splice into the existing pump so they run together????:
James Thomas
"NO CLASS"
Re: Fuel pump for 500-600+RWHP
A Walbro engineer buddy of mine told me that they "torture tested" the pumps to 24 volts and didn't find any actual damage and negligible difference. In fact, he said the under voltage was the killer... not 13 - 23 volts and the higher (within reason) DC voltage was more efficent. I think that the pump booster / boost a pump which only raises the voltage "on demand under high boost" is not a problem at all. I'm gonna install mine and it doesn't make any difference what pump / set up I run. I'm gonna run it anyway just to be on the safe side.
________
James
A Walbro engineer buddy of mine told me that they "torture tested" the pumps to 24 volts and didn't find any actual damage and negligible difference. In fact, he said the under voltage was the killer... not 13 - 23 volts and the higher (within reason) DC voltage was more efficent. I think that the pump booster / boost a pump which only raises the voltage "on demand under high boost" is not a problem at all. I'm gonna install mine and it doesn't make any difference what pump / set up I run. I'm gonna run it anyway just to be on the safe side.
________
James
brock1949
Its alive!!!
Re: Fuel pump for 500-600+RWHP
i just realized i'd been misslead on the price of those pump boosters.. 300-330 dollars. + a walbro 12-.. so its 100 dollars more to do the walbro MSD setup than a A1000.
The only real problem with the A1000 is its to much pump.. cycles the gas tank to often which could be a problem on a 100 degree day sitting in traffic if every 4-8 minutes it cycles the fuel. I think i would probably put a cooler setup small radiator back by the gas tank to cool the return fuel as it entered the tank like whats on my diesels from the factory. I've got some summit bucks built up that i can drive by summit (i work 10 minutes from summit racing) and pickup a A1000 for about 260 dollars. probably redo the entire fuel supply and return system in braided lines and clean it all up. going to take one last good look at dual 255 setup though.
i just realized i'd been misslead on the price of those pump boosters.. 300-330 dollars. + a walbro 12-.. so its 100 dollars more to do the walbro MSD setup than a A1000.
The only real problem with the A1000 is its to much pump.. cycles the gas tank to often which could be a problem on a 100 degree day sitting in traffic if every 4-8 minutes it cycles the fuel. I think i would probably put a cooler setup small radiator back by the gas tank to cool the return fuel as it entered the tank like whats on my diesels from the factory. I've got some summit bucks built up that i can drive by summit (i work 10 minutes from summit racing) and pickup a A1000 for about 260 dollars. probably redo the entire fuel supply and return system in braided lines and clean it all up. going to take one last good look at dual 255 setup though.
brock1949
Its alive!!!
Re: Fuel pump for 500-600+RWHP
1 255ltr/hr pump is 66.3 Gallons hr
A1000 fuel pump .. 98 gallons hr
1 255 + 1 190 pumps is 115.7 gallons hr
2 255ltr/hr pumps are 132.6 gallons hr
Only problem i see with mixing 255's and 190's is the 190 isn't a high pressure so i'm not sure if there would be enough flow that the 255 wouldn't be making life rough on the 190.
1 255ltr/hr pump is 66.3 Gallons hr
A1000 fuel pump .. 98 gallons hr
1 255 + 1 190 pumps is 115.7 gallons hr
2 255ltr/hr pumps are 132.6 gallons hr
Only problem i see with mixing 255's and 190's is the 190 isn't a high pressure so i'm not sure if there would be enough flow that the 255 wouldn't be making life rough on the 190.
brock1949
Its alive!!!
Re: Fuel pump for 500-600+RWHP
6 65lb injectors at 100% should use right around 59.28 gallons hr..
BUT again the gallons HR change with the amount of pressure they are required to run at. so by my math.. (which.. holy crap i'm not that sweet) a 255 ALONE is way way to close to not big enough considering loss via pressures etc.. figure 45psi base pressure,.. 1:1 FPR running 20 lbs of boost your now talking about 75PSI of pressure in the lines.. that messes those numbers ALL up.
So i'm really starting to think dual walbro's with some type of a monitoring on them is the best way to go.
6 65lb injectors at 100% should use right around 59.28 gallons hr..
BUT again the gallons HR change with the amount of pressure they are required to run at. so by my math.. (which.. holy crap i'm not that sweet) a 255 ALONE is way way to close to not big enough considering loss via pressures etc.. figure 45psi base pressure,.. 1:1 FPR running 20 lbs of boost your now talking about 75PSI of pressure in the lines.. that messes those numbers ALL up.
So i'm really starting to think dual walbro's with some type of a monitoring on them is the best way to go.
dgoodhue
BuSTeD 4.3
Re: Fuel pump for 500-600+RWHP
At what PSI are those number rated at? Auto Performance Engineering has some walbro flow vs psi number on their website (under techincal)
http://www.autoperformanceengineering.com/
At 70 Psi and 12V Walbro high pressure are 46 gal/hr and 13.5 volt is 56 gal/hr. I have no idea if those numbers on his website are correct, but 46 gal/hr is quite a bit different than 66 gal/hr.
edit- I see you since posted since I have responded...
brock1949 said:
At what PSI are those number rated at? Auto Performance Engineering has some walbro flow vs psi number on their website (under techincal)
http://www.autoperformanceengineering.com/
At 70 Psi and 12V Walbro high pressure are 46 gal/hr and 13.5 volt is 56 gal/hr. I have no idea if those numbers on his website are correct, but 46 gal/hr is quite a bit different than 66 gal/hr.
edit- I see you since posted since I have responded...
brock1949
Its alive!!!
Re: Fuel pump for 500-600+RWHP
Talked to Apeusa, He felt that a single 255 couldn't cut it unless it was at 17 volts and then said it would work but might not be the longest lasting thing with the voltage up. His recommendation was a big noisey race pump.. (i think refering to A1000) or a dual 255 high pressure setup with 3/8ths feed line.
82-102 gallons HR at 70-80PSI With dual 255's for 230 bucks or so.. doesn't seem like a bad deal.
What do you guys think?
Talked to Apeusa, He felt that a single 255 couldn't cut it unless it was at 17 volts and then said it would work but might not be the longest lasting thing with the voltage up. His recommendation was a big noisey race pump.. (i think refering to A1000) or a dual 255 high pressure setup with 3/8ths feed line.
82-102 gallons HR at 70-80PSI With dual 255's for 230 bucks or so.. doesn't seem like a bad deal.
What do you guys think?
brock1949
Its alive!!!
Re: Fuel pump for 500-600+RWHP
alright still fighting the pump battle.. either i'm going to run 2 walbro 255's (both pumps entire time) or 1 A1000. How do i sump the tank if i run the A1000?
Also injector sizing and where to buy, .. i'm thinking 60-72lbs but i need high impd.. Are larger than 65lb's going to be hard to tune? i will be running sequential so it might help out but still.
Again everyone thanks for all of the time and effort.
alright still fighting the pump battle.. either i'm going to run 2 walbro 255's (both pumps entire time) or 1 A1000. How do i sump the tank if i run the A1000?
Also injector sizing and where to buy, .. i'm thinking 60-72lbs but i need high impd.. Are larger than 65lb's going to be hard to tune? i will be running sequential so it might help out but still.
Again everyone thanks for all of the time and effort.
blk00z28
Forced to by choice
Re: Fuel pump for 500-600+RWHP
A little mouse told me to search summit. 20 gal alum. summped tank with sending unit I think was $200.. This is probably what I'm going to be going after in the future. But its a square tank. I'd like one more the shape of our stock one. (for stock location, due to tranny cooler, unless I mount it in the bed.. :dunno: )
brock1949 said:
A little mouse told me to search summit. 20 gal alum. summped tank with sending unit I think was $200.. This is probably what I'm going to be going after in the future. But its a square tank. I'd like one more the shape of our stock one. (for stock location, due to tranny cooler, unless I mount it in the bed.. :dunno: )