New HFS-1 system not working

[Richard L]

Got it, 4125.

The "B" or "high boost enabled" only comes on where all the conditions are correct, ie, the water flow is inside the WL and WH area after triggering.

The instruction may not be as clear on the user manual, basically you need to set the first to read about 5 bars under boost conditions.

WL (set windwow low limit) ..... fully counter-clockwise = 1 bar display, fully clockwise = 5 bar display
wH (set window High limit) ..... fully cloackwise = 8 bar, fully counterclockwise = 5 bars

If you set WL and WH at 12 o'clock, your window width is approximate 3-7bars, if the indicated bar goes outside those window limites, the failsafe will trip and reduce your boost and "B" goes off. The "B" stays activated as long as you are inside the window during spray.


Does this make any sense to you? If you are not sure, set the WL and WH at 12 o'clock and tell me if this works.

[blk01s4]

Cool thanks .. here is what I discovered is a problem with the entire setup. Lets say that the conditions aren't met and that the B light goes out. The system continues to spray while the engine is not under boost and almost chokes my car with water. Anyway to get the water to STOP spraying when the B light goes out and the conditions are not met ?

[Richard L]

100% correct!

[blk01s4]

So how do I get it to stop spraying when B is not lit

[Richard L]

I need to explain this.

The system doesn't stop spraying because the "B" goes off.

It is quite the reverse ...

The "B" light goes off when the system is not spraying properly. ie - not spray or too much spray.

When the system is spraying the correct amount after trigger, the "B" light will continue to activate. If something is wrong the "B" will go off.

[blk01s4]

Originally Posted by Richard L

I need to explain this.

The system doesn't stop spraying because the "B" goes off.

It is quite the reverse ...

The "B" light goes off when the system is not spraying properly. ie - not spray or too much spray.

When the system is spraying the correct amount after trigger, the "B" light will continue to activate. If something is wrong the "B" will go off.

That I understand but when the B light goes out, from my recollection it cuts boost. That being so since there is no boost it continues to spray which is a bad thing since it chokes my engine with water. Or do I have this all wrong?

Then again if its properly dialed in this wouldn't be an issue but Im just trying to learn all the in's and out's of the system.

[Richard L]

the reason for the "B" light going out is because there is no spray. I think you are looking at this the wrong way round.

If the spray recovers, the "B" light will re-activate, allowing high boost.

[blk01s4]

For the sake of a mental excercise is there any way to get the spray to stop with the B light turns off? Leaving all other known variables and what ifs out. Is that even possible?

[Richard L]

The "B" light has nothing to do with the spraying.

I am go and give up soon, I can't get this across to you.

[Richard L]

I spoke to Jeff Howerton this, he suggested that your engine is not happy after a failsafe trigger.

Can you tell me how you wire up the failsafe to reduce boost?


Back to the "B" led.... what actually happen in real time:

1. When the system under flows, it means "zero flow", becasue it is an "full-on" or "full-off" system Boost drop and no methanol is sprayed anyway

2. When the system over flows, it has to be a cut/leaky hose, there is no other way. In this case, the system may not spray any or minimal methanol into the engine.

One way to stop this happpening is by triggering the system via boost. Set the Trigger point above wastegate pressure. So when the "B" goes off, boost drops below triggering point and spray stops.

Does this make more sense and a viable way to stop spray?