[scheides]

Looks like the -3 will be a really nice setup!

Originally Posted by Richard L

The HFS-3's adjustability is limited compared to the HFS-6.

It cannot (compared to the HFS-6):
- offset against the initial F-IDC - the F-IDC threshold % = starting point of meth flow %
- It doesn't have manifold pressure compensation
- alter the failsafe reset period = pegged at 3 seconds
- read "Direct Injection" pulses such as the 335i or Audi FSI pulses
- control a MAC valve directly as with the HFS-6

It can:
- put gain on the incoming F-IDC for purpose of having large fuel injectors running low DC. Previously, the HFS-5 has to be double pulsed.
- You can run the system based on boost or IDC only. In single or progressive mode.
- You can program it to be single point (HFS-1) or PWM-V mode (HFS-5).


The HFS-6 has futher electronic signal processing to match the FAV's opening and closing period. That is all I can think of so far.

IMHO this makes the -3 the kit to get, as you get progressive injection for the cost of a single-stage kit. Hopefully I can get my hands on a kit sooner or later and we'll see how it works