Walbro 400LPH intank pump ? Anyone got any info
Me to. Snow is right around the corner. I need to get my new injectors installed and then this pump if my DW doesnt flow enough for E85. Im hoping to make it to the track this year
David. I hope this is not a dumb question but maybe its worth a thought though.
Let's see how to word this. When you do the 255 fuel pump mod it runs the pump harder? If that's the case that would mean the pump runs hotter and heats the fuel up. Maybe the 400 fuel pump runs cooler? If so even though a double pumper configuration is uncalled for with the 400 fuel pump maybe its worth a look on if it keeps fuel temps down because it does not have to work as hard.
Just a thought. Probably stupid but I wont know unless I ask.
Let's see how to word this. When you do the 255 fuel pump mod it runs the pump harder? If that's the case that would mean the pump runs hotter and heats the fuel up. Maybe the 400 fuel pump runs cooler? If so even though a double pumper configuration is uncalled for with the 400 fuel pump maybe its worth a look on if it keeps fuel temps down because it does not have to work as hard.
Just a thought. Probably stupid but I wont know unless I ask.
Is anyone even running one of these yet on stock regulator?
cause that seems to be the make or break the product for me. I hate after market regulators much less the added cost of them. if that becomes a requirement to use this pump then a double pumper makes far more sense to me.
if heating fuel is a concern then this pump will be at top of list in that area. double pumper lowest as second pump only runs under boost.
cause that seems to be the make or break the product for me. I hate after market regulators much less the added cost of them. if that becomes a requirement to use this pump then a double pumper makes far more sense to me.
if heating fuel is a concern then this pump will be at top of list in that area. double pumper lowest as second pump only runs under boost.
Is anyone even running one of these yet on stock regulator?
cause that seems to be the make or break the product for me. I hate after market regulators much less the added cost of them. if that becomes a requirement to use this pump then a double pumper makes far more sense to me.
if heating fuel is a concern then this pump will be at top of list in that area. double pumper lowest as second pump only runs under boost.
cause that seems to be the make or break the product for me. I hate after market regulators much less the added cost of them. if that becomes a requirement to use this pump then a double pumper makes far more sense to me.
if heating fuel is a concern then this pump will be at top of list in that area. double pumper lowest as second pump only runs under boost.
I agree, if we need an aftermarket FPR to use this pump, the price advantage over a Buschur double pumper shrinks considerably.
Walbro 400lph Fuel Pump: $160
Fuel Pump Rewire Kit (STM or other): $30
Aftermarket FPR with Pressure Gauge & Install Kit: $200+
Total: $390+
Buschur Double Pumper:
$515 (with exchange of your old parts)
Is anyone even running one of these yet on stock regulator?
cause that seems to be the make or break the product for me. I hate after market regulators much less the added cost of them. if that becomes a requirement to use this pump then a double pumper makes far more sense to me.
if heating fuel is a concern then this pump will be at top of list in that area. double pumper lowest as second pump only runs under boost.
cause that seems to be the make or break the product for me. I hate after market regulators much less the added cost of them. if that becomes a requirement to use this pump then a double pumper makes far more sense to me.
if heating fuel is a concern then this pump will be at top of list in that area. double pumper lowest as second pump only runs under boost.
https://www.evolutionm.net/forums/ev...ould-know.html
Last edited by Migsubishi; Oct 9, 2011 at 02:36 PM.
Drill out the fuel return line T orifice as TedB once explained he had to do when going to the double pump set up. This negates the use or need for an aftermarket regulator.
https://www.evolutionm.net/forums/ev...ould-know.html
https://www.evolutionm.net/forums/ev...ould-know.html
Last edited by 94AWDcoupe; Oct 9, 2011 at 05:33 PM.
that fixes the return restriction at tank. doesnt fix restriction at factory regulator. Ted was using an aftermarket regulator. the factory regulator regulates fuel through a hole about .080 in diameter. it cant be drilled out. an aeromotive regulator regulates through a hole about .200. but being the area of a circle the flow is four or five times as much.
other then added expense why do you dislike FPR's? are they less consistent then a stock one or something? i do not understand.
my dumb *** bought one because i thought it would look cool. hahaha. i have not installed it yet.
Well I have the harness I was talking about in my had. Unfortunately it use to be in a bag and now the part number is missing. I was hoping to find the number and just Google it. This thing is dead-sexy.
OK, here is some more information, even though according to some flow testing is required.....ROFL.
AMP draw and this hot wire kit.
I measured volts at the fuel pump when we did the double pumper. The voltage drop back at the pump was high. The fix for this was a ground cable of all things and I put in a permanent LARGE gauge ground from the back of the block to the firewall, voltage at the double pumper stayed up after that.
I'm going to use 13.2 volt reference at the pump for the amp draw.
The 400 lph pump draws 11.9 amps at 40 psi (idle basically) and 14.2 amps at 70 psi of rail pressure and 15 amps at 80 psi of rail pressure.
The standard 255 lph EVO drop in fuel pump draws 6.8 amps at 40 psi, 10.1 at 70 psi and 11.5 amps at 80 psi.
The modded 255 lph EVO pump we use in the double pumper draws 7.2 amps at 40 psi, 10.4 at 70 psi and 11.7 at 80 psi.
So while this new 400 lph pump does draw more than the rest, the amp draw still is not that substantial drawing only 3.5 more amps than a standard drop in 255.
Based on the FACTS, I'm not sold on a hot wire kit being needed.
I did a quick search and spoke with Dan, my brother who does all the wiring here. Based on a few charts I found scattered around for wiring of 12 volts at 15 amps of draw at 12 volts an 18 gauge wire can be used up to 10' of length and 15' of wire can be used at 14 gauge.
Dan says the wiring on the EVO pump is what he'd guess, 14 gauge. Also keep in mind as the voltage goes up the gauge requirement goes down and you guys should be able to see 13+ volts at the pump with a good ground, leaving a little more safety factor in the wiring.
In other words, I don't see a need for anything but a good ground to be added from the block to the firewall for any of these pumps. Obviously the double pumpers have worked perfectly with over 500 units being sold and they use the factory wiring.
Given that fact, if someone still wants to buy a bad *** fuel pump re-wire kit I will now sell this single unit I have
AMP draw and this hot wire kit.
I measured volts at the fuel pump when we did the double pumper. The voltage drop back at the pump was high. The fix for this was a ground cable of all things and I put in a permanent LARGE gauge ground from the back of the block to the firewall, voltage at the double pumper stayed up after that.
I'm going to use 13.2 volt reference at the pump for the amp draw.
The 400 lph pump draws 11.9 amps at 40 psi (idle basically) and 14.2 amps at 70 psi of rail pressure and 15 amps at 80 psi of rail pressure.
The standard 255 lph EVO drop in fuel pump draws 6.8 amps at 40 psi, 10.1 at 70 psi and 11.5 amps at 80 psi.
The modded 255 lph EVO pump we use in the double pumper draws 7.2 amps at 40 psi, 10.4 at 70 psi and 11.7 at 80 psi.
So while this new 400 lph pump does draw more than the rest, the amp draw still is not that substantial drawing only 3.5 more amps than a standard drop in 255.
Based on the FACTS, I'm not sold on a hot wire kit being needed.
I did a quick search and spoke with Dan, my brother who does all the wiring here. Based on a few charts I found scattered around for wiring of 12 volts at 15 amps of draw at 12 volts an 18 gauge wire can be used up to 10' of length and 15' of wire can be used at 14 gauge.
Dan says the wiring on the EVO pump is what he'd guess, 14 gauge. Also keep in mind as the voltage goes up the gauge requirement goes down and you guys should be able to see 13+ volts at the pump with a good ground, leaving a little more safety factor in the wiring.
In other words, I don't see a need for anything but a good ground to be added from the block to the firewall for any of these pumps. Obviously the double pumpers have worked perfectly with over 500 units being sold and they use the factory wiring.
Given that fact, if someone still wants to buy a bad *** fuel pump re-wire kit I will now sell this single unit I have
OK, here is some more information, even though according to some flow testing is required.....ROFL.
AMP draw and this hot wire kit.
I measured volts at the fuel pump when we did the double pumper. The voltage drop back at the pump was high. The fix for this was a ground cable of all things and I put in a permanent LARGE gauge ground from the back of the block to the firewall, voltage at the double pumper stayed up after that.
I'm going to use 13.2 volt reference at the pump for the amp draw.
The 400 lph pump draws 11.9 amps at 40 psi (idle basically) and 14.2 amps at 70 psi of rail pressure and 15 amps at 80 psi of rail pressure.
The standard 255 lph EVO drop in fuel pump draws 6.8 amps at 40 psi, 10.1 at 70 psi and 11.5 amps at 80 psi.
The modded 255 lph EVO pump we use in the double pumper draws 7.2 amps at 40 psi, 10.4 at 70 psi and 11.7 at 80 psi.
So while this new 400 lph pump does draw more than the rest, the amp draw still is not that substantial drawing only 3.5 more amps than a standard drop in 255.
Based on the FACTS, I'm not sold on a hot wire kit being needed.
I did a quick search and spoke with Dan, my brother who does all the wiring here. Based on a few charts I found scattered around for wiring of 12 volts at 15 amps of draw at 12 volts an 18 gauge wire can be used up to 10' of length and 15' of wire can be used at 14 gauge.
Dan says the wiring on the EVO pump is what he'd guess, 14 gauge. Also keep in mind as the voltage goes up the gauge requirement goes down and you guys should be able to see 13+ volts at the pump with a good ground, leaving a little more safety factor in the wiring.
In other words, I don't see a need for anything but a good ground to be added from the block to the firewall for any of these pumps. Obviously the double pumpers have worked perfectly with over 500 units being sold and they use the factory wiring.
Given that fact, if someone still wants to buy a bad *** fuel pump re-wire kit I will now sell this single unit I have
AMP draw and this hot wire kit.
I measured volts at the fuel pump when we did the double pumper. The voltage drop back at the pump was high. The fix for this was a ground cable of all things and I put in a permanent LARGE gauge ground from the back of the block to the firewall, voltage at the double pumper stayed up after that.
I'm going to use 13.2 volt reference at the pump for the amp draw.
The 400 lph pump draws 11.9 amps at 40 psi (idle basically) and 14.2 amps at 70 psi of rail pressure and 15 amps at 80 psi of rail pressure.
The standard 255 lph EVO drop in fuel pump draws 6.8 amps at 40 psi, 10.1 at 70 psi and 11.5 amps at 80 psi.
The modded 255 lph EVO pump we use in the double pumper draws 7.2 amps at 40 psi, 10.4 at 70 psi and 11.7 at 80 psi.
So while this new 400 lph pump does draw more than the rest, the amp draw still is not that substantial drawing only 3.5 more amps than a standard drop in 255.
Based on the FACTS, I'm not sold on a hot wire kit being needed.
I did a quick search and spoke with Dan, my brother who does all the wiring here. Based on a few charts I found scattered around for wiring of 12 volts at 15 amps of draw at 12 volts an 18 gauge wire can be used up to 10' of length and 15' of wire can be used at 14 gauge.
Dan says the wiring on the EVO pump is what he'd guess, 14 gauge. Also keep in mind as the voltage goes up the gauge requirement goes down and you guys should be able to see 13+ volts at the pump with a good ground, leaving a little more safety factor in the wiring.
In other words, I don't see a need for anything but a good ground to be added from the block to the firewall for any of these pumps. Obviously the double pumpers have worked perfectly with over 500 units being sold and they use the factory wiring.
Given that fact, if someone still wants to buy a bad *** fuel pump re-wire kit I will now sell this single unit I have
How much. Haha. Pm me your price
Whether it changes or not, we now have the actual AMP draw for each pump listed and knowing our modded pumps are working flawlessly on the stock wiring my opinion is we are safe.
Dan, $120.
Dan, $120.