The AMC Forum : Electric or Mechanical Fuel Pump Decision.

The AMC Forum : Electric or Mechanical Fuel Pump Decision. http://theamcforum.com/forum/ This is an XML content feed of; The AMC Forum : V8 Engine Repair and Modifications : Electric or Mechanical Fuel Pump Decision. Sat, 25 May 2013 21:18:02 +0000 Mon, 16 Apr 2012 07:33:25 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 10.03 360 theamcforum.com/forum/RSS_post_feed.asp?TID=38645 The AMC Forum http://theamcforum.com/forum/http://www.theamcforum.com/forum/skin_images_amc/forumheader.png http://theamcforum.com/forum/ Electric or Mechanical Fuel Pump Decision. : I have installed a electric pump... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post353778.html#353778 Author: Lucas660
Subject: 38645
Posted: Apr/16/2012 at 7:33am

I have installed a electric pump in my '64 classic as parts are hard to come by here in Australia. I have also adapted electric wipers using a mitsubishi wiper motor and spare fan switch I had in my parts box.
You need to fit a inline filter at the engine for ease of servicing and make sure the pressure is not too high or you will give the needle and seat a hard time. I cannot notice the pump running once the engine starts with dual stainless exhaust. I have also fitted a lpg lockoff controller, i think they call it propane is the US? which basically primes the fuel then looks for a pulse from the coil to recognise that the engine is running before the pump keeps going, it may not be necessary but I thought it was a good idea in case of a broken fuel line etc.
]]> Mon, 16 Apr 2012 07:33:25 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post353778.html#353778 Electric or Mechanical Fuel Pump Decision. : Thanks for all the help guys!Will... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352917.html#352917 Author: Graphic Spill
Subject: 38645
Posted: Apr/12/2012 at 12:49pm

Thanks for all the help guys!

Will give you a report on how it turns out once I have the rest of the car back together as I am currently cleaning up the rear end.

Here is a picture of what I did with the engine, picture take about a year ago.

Edited by Graphic Spill - Apr/12/2012 at 12:52pm]]> Thu, 12 Apr 2012 12:49:47 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352917.html#352917 Electric or Mechanical Fuel Pump Decision. : The old style electric pumps were... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352864.html#352864 Author: farna
Subject: 38645
Posted: Apr/12/2012 at 9:54am

The old style electric pumps were "pulse" pumps that made a rather loud sound. Basically it was a solenoid vibrating and flexing a diaphragm very fast. The newer turbine style pumps don't make as much noise, but make sure you get one designed for a carb.

The pump should be as close to the tank under the car as possible, and as low as possible. Electric pumps aren't designed to pull much, they mainly push. You will also need a fuel pressure regulator with an electric pump, and make sure the pump is designed for a carburetor (I know, I mentioned that already!). You might need a return line, but I doubt it.

A stock mechanical pump will easily keep up with the demands of the engine. It might start to starve during a 140 mph run, if you get it up that fast and keep it there for 10-15 minutes without killing someone or getting stopped. I dobt the pump would be a problem even then -- the more rpm the engine turns the more fuel it pumps. So you should be good with a stock replacement pump. Electric isn't normally more reliable. It might be if you can't get a good rebuilt replacement. With the age of these cars that could be a problem, but I'd try a stock replacement first.
]]> Thu, 12 Apr 2012 09:54:26 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352864.html#352864 Electric or Mechanical Fuel Pump Decision. : I could not take the sound from... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352803.html#352803 Author: FuzzFace2
Subject: 38645
Posted: Apr/11/2012 at 10:55pm

I could not take the sound from the elect. pump if used on a street car, on a race car you dont hear it.

I am with TRTom pump would not cause the issue you are having. Now if foot to the board or pulling a long steap hill and it runs (or doen not run) like it is running out of fuel then yes the pump.

Dave ----

]]> Wed, 11 Apr 2012 22:55:59 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352803.html#352803 Electric or Mechanical Fuel Pump Decision. : There probably are quieter... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352747.html#352747 Author: BDCVG
Subject: 38645
Posted: Apr/11/2012 at 7:55pm

There probably are quieter pumps out now, I just realized My pump is 20 years old, lol on the bright side it has lasted 20 years.]]> Wed, 11 Apr 2012 19:55:33 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352747.html#352747 Electric or Mechanical Fuel Pump Decision. : @ tyrodtom,Thanks for the info...... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352723.html#352723 Author: Graphic Spill
Subject: 38645
Posted: Apr/11/2012 at 7:01pm

@ tyrodtom,

Thanks for the info... I think I am leaning towards replacing the mechanical pump and seeing how she runs prior to messing much with installing an electric pump into fuel system.

Edited by Graphic Spill - Apr/11/2012 at 7:08pm]]> Wed, 11 Apr 2012 19:01:52 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352723.html#352723 Electric or Mechanical Fuel Pump Decision. : If you already have electric... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352717.html#352717 Author: tyrodtom
Subject: 38645
Posted: Apr/11/2012 at 6:51pm

If you already have electric wipers, good. Because if they were vacuum wipers, you'd need the vacuum pump on the stock fuel pump.

If you've got a hesitation problem, that's probably nothing to do with the fuel pump.

The fuel pump just fills the carb float bowl until the inlet needle shuts off the flow, the carb doesn't know or care how that float bowl is filled.

]]> Wed, 11 Apr 2012 18:51:00 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352717.html#352717 Electric or Mechanical Fuel Pump Decision. : @ BDCVG,Thanks for theresponse,... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352716.html#352716 Author: Graphic Spill
Subject: 38645
Posted: Apr/11/2012 at 6:47pm

@ BDCVG,

Thanks for the response, I had not thought of the annoyance of having to listen to the sound of the electric pump. Perhaps if anyone else reads this and knows of a quiet yet productive pump they could list the brand they used. I found a few youtube videos which instruct the relay connected to the ignition but your thought to use the oil pressure wiring is one I had not thought of.

]]> Wed, 11 Apr 2012 18:47:00 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352716.html#352716 Electric or Mechanical Fuel Pump Decision. : My 770 does have electric wipers,... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352714.html#352714 Author: Graphic Spill
Subject: 38645
Posted: Apr/11/2012 at 6:37pm

My 770 does have electric wipers, but why would that would matter in regards to switching the fuel pump? I was under the impression that one advantage in an electric pump would be to resolve fuel pressure problems common in older cars, which would resolve hesitation when stepping on it.

The car is just a cruiser however I would like it to have a little pep which i should get from the 287.

]]> Wed, 11 Apr 2012 18:37:49 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352714.html#352714 Electric or Mechanical Fuel Pump Decision. : This is probably personal... http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352707.html#352707 Author: BDCVG
Subject: 38645
Posted: Apr/11/2012 at 6:30pm

This is probably personal choice more than anything. I went electric with a relay/harness from Painless wiring. I have the relay run through a basic oil pressure switch. When there is oil pressure power goes to the relay and that turns on the pump. I was experiencing vapor lock and this cured it, but I do have to listen to the constant buzzing coming from the pass. side rear of car.]]> Wed, 11 Apr 2012 18:30:32 +0000 http://theamcforum.com/forum/electric-or-mechanical-fuel-pump-decision_topic38645_post352707.html#352707