TECHNICAL DESCRIPTION

Peak and Hold 8A/2A

• Controls up to 4 injectors with impedance below 1.5 ohm
• 4 FT Injectors (1 per channel)
• 16 Bosch 160lb/h (1600cc) injectors (4 per channel)
• 8 Siemens low impedance injectors (2 per channel)
• 4 MSD low impedance injectors (2 per channel) (with 2 ohms impedance per injector)

Peak and Hold 4A/1A

• Controls up to 4 injectors with 1.5 to 3 ohms of impedance
• 8 Bosch 160lb/h (1600cc) injectors (2 per channel)
• 4 Siemens 83lb/h injectors
• 4 MSD injectors (with 2 ohms impedance per injector)

Peak and Hold 2A/0.5A

• Controls up to 4 injectors with 3 to 7 ohms of impedance
• 4 Bosch 160lb/h (1600cc) injectors

TO DETERMINE WHICH PEAK & HOLD YOU NEED

1. Grab a multimeter and select Ohms 200
2. Touch the positive and negative leads of multi-meter together to measure resistance (record this number...i.e. measured 0.3)
3. Then take the positive and negative leads from the multimeter and put them on each terminal of the injector. Doesn't matter the order. Record this measurement
4. Take the ohms measurement from Step 3 and then subtract the number you got in Step 2 (i.e. Step 3 4.8ohms - Step 2 0.3ohms = Total 4.5ohms)

High Impedance Injectors - Above 7ohms - No Peak and Hold Boxes are needed.
Peak and Hold 2A - 3ohms to 7ohms (Bosch 160lb/hr).
Peak and Hold 4A - Below 3ohms to 1.5ohms.
Peak and Hold 8A - Below 1.5ohms (FT Injector, Billet Atomizer*).
All low impedance Billet Atomizer Injectors manufactured after Nov. 2012 require 8A regardless of measured resistance.

*Billet Atomizer Injectors - Anything prior to serial # C300**** should only use the 4A/1A. This only applies to injectors manufactured prior to Nov. 2012.