MrLiken Posted August 1, 2015 Share Posted August 1, 2015 What is he asking now??? I know - bear with me a moment. Car #4987 has an awful lot of very early equipment. Yes, it does appear to have a 17 cowl, fenders and brake drums. All that doesn't really matter to me, but what does is having a good running, very early, nearly original car. I have been working on this for 26 years and finally got it off of my street this January. I needed to have it ready for the Balboa Park Centenial Celebration and Car Show. Well, she made it.... almost. We got to Balboa Park and was shown with all the other very pretty horseless brass carriages. We set off for the cruise portion and long story short, I sustained an engine fire two blocks after passing the finish line. Part of the repair led me to install an in-line fuel filter, 12v electric fuel pump and a regulator. Now my car has the pressure feed fuel system, but I always seemed to be pumping the hand pump instead of enjoying the ride. My model D 4 wire starter/generator has a problem, but I don't want to tear it down in the middle of summer touring season. After all, this is my first touring season. My electrical system has a draw and so the shop installed a master cut-off (prior to me installing the fuel pump). Recommendation was to get the engine running then shut off the battery. Problem was no horn or tail light before. Now, with the fuel pump if I do that, I loose fuel flow. Today, my battery was dead as can be. I took it back to the auto parts store and they tested and replaced it (again!) Got me thinking.... If I loose battery power, I am for sure calling a tow. Hand crank won't get my fuel past my fuel pump. Back to my topic title. Does anyone know if there is such thing a flow-thru fuel pump to where if I loose power, I can still use my OEM fuel pressure system to supply fuel to the carb? If not, does anyone have any ideas (other than getting my generator problem fixed)? Thank you in advance,John Link to comment Share on other sites More sharing options...
MrLiken Posted August 1, 2015 Author Share Posted August 1, 2015 (edited) I just started reading the new content and low and behold I find a Fuel pump / vacuum topic. I think that Jessie's recommendation will also work with what I have described. Please excuse my lack of reading before writting. Edited August 1, 2015 by MrLiken (see edit history) Link to comment Share on other sites More sharing options...
nearchoclatetown Posted August 1, 2015 Share Posted August 1, 2015 (edited) MrLiken, you are mixing apples and oranges. Your early car with a hand pump pressurizes the fuel tank to PUSH gas front to the carb. The later cars use engine vacuum to PULL gas to the carb. Not saying you can't rig it. JUST saying fix it right like the Brothers intended it to be. Does your ENGINE fuel pump still work? The only time you should have to use the hand pump is when the car sits for a while and loses pressure. Edited August 1, 2015 by nearchoclatetown (see edit history) Link to comment Share on other sites More sharing options...
30dodge35 Posted August 1, 2015 Share Posted August 1, 2015 I am not familiar with the D4 system What I described in other post was for a vacuum tank I always try to fix it original I only install electric for a back up system Not sure how it will work with a pressure system? Link to comment Share on other sites More sharing options...
cahartley Posted August 1, 2015 Share Posted August 1, 2015 As your original setup calls for a SEALED tank.......did you vent the tank for the pump? Link to comment Share on other sites More sharing options...
MrLiken Posted August 2, 2015 Author Share Posted August 2, 2015 As your original setup calls for a SEALED tank.......did you vent the tank for the pump?I did not vent the tank, but it seems to be working a lot better than the pressurized system. The engine pump is suspect. I don't have a gauge to measure pressure, so I installed a barb from the engine pump and tied on a balloon. It barely stood the ballon up, but did not inflate. There is not much to the pump but I did all I could. Like I said, I will be fixing it right, I just want to get on the road and enjoy its' centenial. Link to comment Share on other sites More sharing options...
cahartley Posted August 2, 2015 Share Posted August 2, 2015 I think if you vent the tank (crack the filler cap as an experiment) when using the electric pump it will work as it should.as you are creating a vacuum in the tank while, conversely, building pressure when using the hand pump. 1 Link to comment Share on other sites More sharing options...
nearchoclatetown Posted August 3, 2015 Share Posted August 3, 2015 You are going to have to explain how you can create either a vacuum or pressure IN the tank with a vented cap.The hand air pump pushes air pressure into the tank to push gas front to the carb. An electric pump uses gravity from the tank to the pump and then pushes gas front to the carb. How can both be used at the same time? The system he has and should get working correctly is a hand pump and an air pump on the engine which both force air into the tank to push gas to the carb. This requires a sealed cap. Or he could disconnect both air pumps and use a Stewart vacuum tank with a vented cap like late '15's use. In that case I would be interested in buying both the hand pump and engine air pump. Link to comment Share on other sites More sharing options...
MrLiken Posted August 3, 2015 Author Share Posted August 3, 2015 Thanks NCT. Your input is always appreciated. I am going to stick with my original equipment, so I will not be selling off my hand and engine pump. For now, what I have works and the lay person on the street doesn't crawl under to look in my frame rail to see if I have a fuel pump. It sure makes my drives alot more pleasurable and afterall, that is what it is all about, isn't it? Link to comment Share on other sites More sharing options...
cahartley Posted August 3, 2015 Share Posted August 3, 2015 You are going to have to explain how you can create either a vacuum or pressure IN the tank with a vented cap.The hand air pump pushes air pressure into the tank to push gas front to the carb. An electric pump uses gravity from the tank to the pump and then pushes gas front to the carb. How can both be used at the same time? That's my point.....they can't. Link to comment Share on other sites More sharing options...
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