CLASS RACER FORUM - View Single Post

Dean Oliver · 03-02-2013, 04:45 PM

Lonnie,

Kenny is right, that is not enough pump for your application. There are a surprising number of class cars that still run a Holley Blue or Black pump, most with results just like you described. I finally got tired of fighting these pumps myself and I switched to an Aeromotive SS pump thanks to Kyle Fickler when he worked there. These pumps aren't much more expensive than the cheap Holleys, but mine will flow just as well today as it did 5 years ago when I installed it. You can buy bigger and more exotic fuel systems, but this pump works great on small block Stockers. Always remember to be sure that you have good voltage at the pump, regardless of brand. Pump output is directly proportional to voltage input.

I have a relatively simple system on my 305 Stocker. From the fuel cell I run a -8 line to the pump, which is mounted rearward and lower than my cell. That way the g's of the car will actuallly help feed the pump. From the pump I have a -6 line to the regulator, and a -6 line from the regulator to the carb. Eliminate or reduce the number of 90 degree fittings in the system as best you can.

With regard to the regulator, I currently run the big port Holley dead-head style regulator. If you are still running the regulator that came with the Holley Blue pump, definitely plan on replacing it. The "Blue" regulator has an internal orifice of .220", and you obviously cannot afford to have a bottleneck in your fuel system of less than 1/4" like that. The big port Holley has an internal orifice of .437", and there are other brands of regulators that are just as good/big, including Aeromotive. I have my regulator mounted in front of, and slightly higher than my carb inlet, so that once I drop the fuel pressure down at the regulator the lower pressure line does not have to fight the g's of the car.

This system gives me a gallon in 26 seconds every time I have free flowed it since it was new 5 years ago. In actuality, once I got the system to less than about 35 seconds the car stopped picking up, so I know 26 is overkill for my little 305 but that's just extra security. My Racepak shows the fuel pressure to be very consistent from one run to the next, and my high gear average is normally 5.6 psi plus or minus 0.1 psi.

Dean

03-02-2013, 04:45 PM	#4
Dean Oliver Junior Member Join Date: May 2002 Location: Stuttgart, AR Posts: 53 Likes: 1 Liked 0 Times in 0 Posts	Re: Fuel pump check Lonnie, Kenny is right, that is not enough pump for your application. There are a surprising number of class cars that still run a Holley Blue or Black pump, most with results just like you described. I finally got tired of fighting these pumps myself and I switched to an Aeromotive SS pump thanks to Kyle Fickler when he worked there. These pumps aren't much more expensive than the cheap Holleys, but mine will flow just as well today as it did 5 years ago when I installed it. You can buy bigger and more exotic fuel systems, but this pump works great on small block Stockers. Always remember to be sure that you have good voltage at the pump, regardless of brand. Pump output is directly proportional to voltage input. I have a relatively simple system on my 305 Stocker. From the fuel cell I run a -8 line to the pump, which is mounted rearward and lower than my cell. That way the g's of the car will actuallly help feed the pump. From the pump I have a -6 line to the regulator, and a -6 line from the regulator to the carb. Eliminate or reduce the number of 90 degree fittings in the system as best you can. With regard to the regulator, I currently run the big port Holley dead-head style regulator. If you are still running the regulator that came with the Holley Blue pump, definitely plan on replacing it. The "Blue" regulator has an internal orifice of .220", and you obviously cannot afford to have a bottleneck in your fuel system of less than 1/4" like that. The big port Holley has an internal orifice of .437", and there are other brands of regulators that are just as good/big, including Aeromotive. I have my regulator mounted in front of, and slightly higher than my carb inlet, so that once I drop the fuel pressure down at the regulator the lower pressure line does not have to fight the g's of the car. This system gives me a gallon in 26 seconds every time I have free flowed it since it was new 5 years ago. In actuality, once I got the system to less than about 35 seconds the car stopped picking up, so I know 26 is overkill for my little 305 but that's just extra security. My Racepak shows the fuel pressure to be very consistent from one run to the next, and my high gear average is normally 5.6 psi plus or minus 0.1 psi. Dean