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• FuelTech’s Peak & Hold 4A/1A Injector Driver is a 4-channel low impedance driver unit that controls up to 4 injectors with impedance between 1.5 to 3 ohms. The mounting kit is included. 
•  Peak and Hold Manual

Features

• Current control driver for low impedance injectors
• 4 channels
• Available in three current versions:
  8A/2A
  4A/1A (Currently Viewing)
  2A/0.5A

Technical Description

• Controls up to 4 injectors with impedance below 1.5 ohm
• 8 FT Injectors
• 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)

• 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)

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

Dimensions: 115 x 90 x 33mm

To determine which Peak & Hold you need

1. Grab a multi-meter 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 multi-meter and put 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.

Contents of Packaging

• 1 Peak and Hold 4A/1A
• 1 Operation and installation guide
• 1 mounting kit (4 rubber mounts, 4 washers and 4 ¼” nuts)
• 6ft Peak and Hold unterminated harness (optional)
• 1 FuelTech black carbon fiber sticker