How to Test BAP?
Thread Starter
Safety Car
Joined: May 2016
Posts: 4,669
Likes: 1,849
From: Erlanger, Kentucky
How to Test BAP?
Hello.
I have an E-force installed on my 2011 Grand Sport. I purchased a Boost-A-Pump and the 3.5 inch pulley to be at the 599 HP level with the kit. I am certain that I installed the BAP and Hobbe's switch correctly but I would like to test it to make sure.
Would someone be able to explain what I need to do to cause the Hobbe's switch to activate and also tell me which wire or wires on the fuel pump harness I need to monitor for the voltage increase?
Thanks.
I have an E-force installed on my 2011 Grand Sport. I purchased a Boost-A-Pump and the 3.5 inch pulley to be at the 599 HP level with the kit. I am certain that I installed the BAP and Hobbe's switch correctly but I would like to test it to make sure.
Would someone be able to explain what I need to do to cause the Hobbe's switch to activate and also tell me which wire or wires on the fuel pump harness I need to monitor for the voltage increase?
Thanks.
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
The Hobbs switch simply closes the circuit when the boost reaches the trigger point (usually 2 or 4 psi) which activates the BAP to send a higher voltage to the pump.
All I did to test mine from time to time was to use a short jumper wire to bridge the terminals on the Hobbs switch and then turn the key on to the Acc position to cycle the fuel pump on a couple of times with the jumper connected and then disconnected and listened to the pump. You should hear a distinct difference in the tone of the pump when the jumper is connected if the BAP is working. That’s my quick and dirty way to field test it.
All I did to test mine from time to time was to use a short jumper wire to bridge the terminals on the Hobbs switch and then turn the key on to the Acc position to cycle the fuel pump on a couple of times with the jumper connected and then disconnected and listened to the pump. You should hear a distinct difference in the tone of the pump when the jumper is connected if the BAP is working. That’s my quick and dirty way to field test it.
Last edited by CI GS; May 10, 2019 at 08:26 AM.
Safety Car
Joined: Nov 2007
Posts: 4,435
Likes: 874
From: Bay Area CA
The Hobbs switch simply closes the circuit when the boost reaches the trigger point (usually 2 or 4 psi) which activates the BAP to send a higher voltage to the pump.
All I did to test mine from time to time was to use a short jumper wire to bridge the terminals on the Hobbs switch and then turn the key on to the Acc position to cycle the fuel pump on a couple of times with the jumper connected and then disconnected and listened to the pump. You should hear a distinct difference in the tone of the pump when the jumper is connected if the BAP is working. That’s my quick and dirty way to field test it.
All I did to test mine from time to time was to use a short jumper wire to bridge the terminals on the Hobbs switch and then turn the key on to the Acc position to cycle the fuel pump on a couple of times with the jumper connected and then disconnected and listened to the pump. You should hear a distinct difference in the tone of the pump when the jumper is connected if the BAP is working. That’s my quick and dirty way to field test it.
Just to add, while jumping the hobb switch quickly use a voltmeter to check voltage between the BAP and fuel pump. It should read 17.5 volts, if so the BAP is doing its job.
Last edited by Mike's LS3; May 11, 2019 at 10:52 AM.
