The Kenne Bell Boost-A-Pump is another option for people looking to add additional fuel to their engine. The most familiar method is to add an
additional in-line pump to supplement the in-tank pump, or drop in a larger in-tank pick-up tube and install a single large fuel pump. Since I began
modifying Mustangs in 1993, I've had the opportunity to try all three of the methods.
I currently run a 255 in-tank Walbo fuel pump (GSS307) with the Boost-A-Pump
system, -8 feed lines, and 60lb injectors. Because my fuel pressure is kept at
a stock 39-40psi and I run a PMS with datalogging for fuel control, I didn't worry
about installing the GSS307 versus the GSS340 (high pressure). The
performance of the two pumps are relatively on par up to 50psi (flow data). To
date, this combination has been the most reliable and the least audible setup.
I have heard of others that have had issues with the Boost-A-Pump, but I
haven't experienced any problems since it was installed in Feb, 2005.
The difference in the two systems is that the Boost-A-Pump will increase
voltage to the fuel pump when triggered through a vacuum or pressure switch,
which increases the fuel volume. The other method increases fuel volume at
all times. The instructions listed are centered around the Kenne Bell
Boost-A-Pump model KB89066 and KB89067. This is the 20amp system
designed to manage a single pump. There is also a 40amp system available
to control 2 fuel pumps. The standard supercharger kit included a 3psi
Each system has their own positives and negatives.
Kenne Bell Boost-A-Pump: There has been discussion over whether or not the increase in voltage is
detrimental to the fuel pumps life. At maximum voltage increase, there's an approximate 5 volt increase
to the stock 12 volt system. However, you must remember that this increase is temporary and only
delivered under the fuel requirement demanded. It is not increased this much unless you have the
system turned up to it's maximum potential. During 95% of the time driving on the road your engine is
under vacuum. This includes any type of casual driving, mild acceleration, idle, and cruising on the
highway. During these periods, the Boost-A-Pump acts as an voltage regulator ensuring that your fuel
pump is receiving the proper 12 volts to the fuel pump. There is no increase in voltage or extra wear and
tear on the fuel pump. The in-tank pump also maintains the stock configuration and stays cool.
In-line and Large Fuel pumps (T-Rex, Aeromotive, SX Industries): These pumps tend to be a touch
noisy but they do insure extra fuel volume. These systems are more mechanical vs electrical. However,
having the extra volume pumped out on a constant basis can cause problems. The fuel is cycled at a
much higher rate increasing the temperature of the fuel. The fuel pump is air cooled and it needs airflow
to help keep the pump cool. As the pump gets hot, (idling in traffic for example), it's more likely to blow a
fuse, stop working from heat sink, or create fuel cavitation. That's one of the reasons why Aeromotive
came out with a voltage regulator for their larger pumps. I've been left on the side of the road on several
occasions with a larger single pump system after sitting in traffic for too long. Once the pump cooled I
was able to continue without difficultly.
The dual Walbo pump system with an in-tank pick up appears to be one of the better out of the tank
systems. Prior to choosing the Boost-A-Pump, this was my second choice, and I have yet to hear any
negative comments about the system.
The choice is yours on the purchase you make. I've always liked the reliability of something mechanical,
but even that needs the electrical voltage to make it work. If you need a vehicle that can sit in traffic all
day long, I'd push toward the Boost-A-Pump. If you have a track car that rarely sees traffic and is
consistently at the track, I'd probably stick with the in-line or single large pump systems. Under track
conditions I'd feel more comfortable with a constant high flow fuel rate.
Kenne Bell Boost-A-Pump Instructions:
1986 - 1998 Mustangs
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*** All Applications: Insure that you install a 30 amp fuse in both the BAP wiring harness as well as a 30 amp fuse in the factory fuse panel.
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