New DW 400 Fuel Pump!
- Thread starter Nick Micale
- Start date
They’re made by russel. 3/8” and 5/16”.
https://www.summitracing.com/parts/rus-644110
https://www.summitracing.com/parts/rus-644133
Just keep in mind, using the factory sending unit I had to modify the original return as a vent and original vent as the return. Not hard with some imagination and a cheap welder.
I’m not sure what exactly that column of fuel would do but the observations I’ve had are that the pump has to be able to flow enough fuel to support the mass flow of the engine plus whatever is needed to maintain 1:1 for manifold pressure. A good safe point from what I’ve seen is 25% more than the engine will ever use at the pressure that will be run. G forces will reduce pump output for sure but it’s variable. I’ve personally experienced a DW300 failure on the dyno without g force where the pump was fine for the first few hits then it fell off hard and couldn’t maintain pressure and part throttle squeezing on the ride home didn’t result in fuel pressure correction at similar manifold pressures as in the Dyno. Though he wasn’t going to flat foot it with a bad pump in it. The owner was lucky this happened at that time and not while making a 140+mph drag strip pass. The pump was sent in and verified to be defective. A major part of a lot of the meltdowns I’ve seen may be due to the regulator type and location. Even when fuel level pump submersion was known to be ok. Submersion and aeration is another big problem with aftermarket junk tanks and low fuel levels. The regulators need to be bypassing a given amount of non aerated fuel to maintain 1:1. When the pump struggles to keep up with demands the regulated pressure not being 1:1 is a problem
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Fuel pump
As pictured you can see the entire stock fuel system was hooked up for the tests
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Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
Pat and I finally got time to do the testing of the 400 pump with stock hanger and lines. As pictured this pump fits the stock hangar like it was made for it! Only thing from stock we had to change to make things work was the regulator. I don't have time tonight to post all the details and measurements but I will say that the results were quite impressive. With the right controller this pump will easily support 80 pound injectors with stock lines! The 2 step controller needed will allow the pump to coast along at 9 volts while only drawing 9 amps ! At this level the restrictive return line is not overloaded and the regulator is able to keep pressure tracking. At higher power levels full voltage is applied and the system can continue tracking accurately. This pump is really impressive and has a unique characteristic that allows it to deliver such volume with the stock feed line. More info when I have time to compile the data. RC
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