dropdatsun Posted March 27, 2011 Report Share Posted March 27, 2011 ok guys this is my problem i just go a hole set up for dual webers 40's on my l20b, my question is i should run my stock fuel pump and around what pressure should it be . but in case that didnt work i got a in-line carter fuel pump from napa a holy regulator with a russell fuel pressure gauge to make thing work. the pump says to use a fuel pressure safety switch that plugs in on your oil pressure gauge. i have no idea on electrical stuff is that set up ok, has anyone done this, Quote Link to comment
Zeusimo Posted March 27, 2011 Report Share Posted March 27, 2011 This Might Help... http://www.racetep.com/webfuelspark.html#webfuel But I've Seen Tons Of People Who Use A Mechanical Pump Quote Link to comment
BRE_dAtSuN Posted March 27, 2011 Report Share Posted March 27, 2011 i believe its like 3 psi Quote Link to comment
Xander_42 Posted March 28, 2011 Report Share Posted March 28, 2011 Just sayin'... it's Holley. Sorry, but I actually don't have any useful advice, just wanted to be jerk. Quote Link to comment
benzo Posted March 28, 2011 Report Share Posted March 28, 2011 I am using mikuni but seems like most people say if you can get it to 3 psi it is better.Now when I had the stock fuel pump with no regulator I was getting 6 psi. People say the higher pressure can cause issues in terms of drivability and mess up the life of the carbs some. I went ahead and kept the stock pump and got a holley regulator and liquid filled pressure guage and set the carbs to 3 psi and did not notice much of a difference power wise but if it may mean better long term life of the carbs I am for it. i thought about going to Carter but if the stock one works fine I have no problem with it. Just seems some guys like using the electric unit to make the engine bay cleaner and supposedly better for cold starts but I kind of like the mechanical pump as the motor cranks some to build up oil pressure in the motor before the engine fires up.just my opinion Quote Link to comment
Zeusimo Posted March 28, 2011 Report Share Posted March 28, 2011 ^^ I Noticed This That Too When I Switched To Mechanical, But It Works, And That's All That Matters :cool: Quote Link to comment
banzai510(hainz) Posted March 28, 2011 Report Share Posted March 28, 2011 I have a stock pump with my Mikunis 40s! Quote Link to comment
Hoosier77 Posted March 28, 2011 Report Share Posted March 28, 2011 i have run a electric pump 4-6 psi with dual 44's all day long, no regulator and no return line, balls to the wall!!!!! screw the saftey switch, who wouldnt want fuel!!!! Quote Link to comment
dropdatsun Posted April 1, 2011 Author Report Share Posted April 1, 2011 thanks guys for all the help. you guys helped olot. i think im just going to use my stock pump with my regulator for now but when i do my egine swap ill go to the carter in-line pump. if u guy need parts for a 620 let me know ill see what i can do i have about 4 620 laying arround. Quote Link to comment
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