View Full Version : fuel pump
bigmack
07-29-2009, 05:01 PM
what size fuel pump should i be running on my car, it runs high 10's low 11 seconds but i'm getting a stumble sometimes around the 1/8 mile marker. i'm running a holley blue now do you think it's to small. thanks for your help. mack.
FullTimeRacing
07-29-2009, 05:51 PM
I've ben running the blue forever,1/2 inch line ,as fast as 10.70 and 7000 rpm.
No problems
bigmack
07-29-2009, 06:19 PM
i'm running 5/8 line from pump to regulator then 1/2 inch from reg to cool can then to carb do you think that's hurting anything.
FullTimeRacing
07-29-2009, 06:31 PM
5/8 what are you using a garden hose,,,,Just kidding.
there are people on here that are more knowledgable than me on this subject,there is a science to it,but I would look at carb or ignition.JMO
bigmack
07-29-2009, 06:38 PM
lol.. yea i got a deal on the #12 braided hose so i used it.
OneBadGMC
07-29-2009, 06:48 PM
If it's holding good fuel pressure going through the traps, then it's just fine.
bigmack
07-29-2009, 06:56 PM
that's something eles i need to know where should you hook the fuel guage up at the regulator after the regulator or what.
FullTimeRacing
07-29-2009, 07:01 PM
carb side of the reg.you cant do anything without knowing the fuel pressure!
chevyfireball
07-29-2009, 11:13 PM
I ditched my Holley and chucked in a BG400. Never had a prob in my Camaro.
fullspeed383
07-30-2009, 02:05 PM
what kind of fuel pressure you run with your bg400 and camaro.
mopar1962
07-30-2009, 02:37 PM
Ditch the 5/8th line,its too big,on accelleration it may be hindering fuel flow......
MEMRACING62
07-30-2009, 02:43 PM
Ditch the 5/8th line,its too big,on accelleration it may be hindering fuel flow......WHAT!!!! :shock: :shock: :shock: YOU ARE SOOOOOOOO! WRONG!
mopar1962
07-30-2009, 03:05 PM
when the cars moving forward the fuel may be moving backwards due to the larger size of the hose reducing pressure, but hey, to each their own, 5/8s line on a 10.90 car? new to me.....
mopar1962
07-30-2009, 03:12 PM
blue pump pressure will drop with the 5/8s line,not powerful enough.my last comment,
wmeabates
07-30-2009, 03:23 PM
A 5/8 fuel line running from the back to the front of the car has a lot of fuel in it that under hard acceleration the weight of the fuel will make the fuel pump see more pressure than is at the regulator.