I am currently running a holley 650 dp and i am runing lean in the upper rpm's and get the occasional pop. Me and my dad put an electronic fuel pump on it recently to replace the mechanical one and it still doesn't do the job. Any suggestions are appreciated.
what kind of pump do you have, where is it mounted and what type/size of feel lines do you have? I have had good luck woth your plain ol Holly red pumps on moderatly modified cars. I mount the pump as close to the tank as possible so that it pushed instead of pulls. Some guys will say it doesnt matter and I have even seen poeple mount them in the engine compartment. Their wrong and I will leave it at that. I also never use the stock lines. I run -6 from tank to carb. If you think the pump and lines you have should be adequite, you might have a vacuum leak that is making it run lean or maybe you need to play with the carb jetting.
i had just a little cheapo purolator electronic fuel pump, but we put a new mechanical one on for the time being and hopefully this weekend ill be able to get a holley electronic one. i have a 4 cyl conversion car and i have heard that you can use the stock in tank pump and just use a drop down thing you can get from summit to drop the pressure for a carb, i was just wondering if this is true?