I have 96 lb injectors and never go over 80 perc duty cycle. With the low map I never go over 60 perc. Horse power goal is 350-400 at 18 lbs

The idc gain trimmer is used to upscale the flow of the jets? Right now I feel like I am running a good deal of methanol. My peak injector duty is 70% this occurs at my redline. Can the Hfs-3 be cranked up to match the flow amount of the Hfs-1, basically will it flow less meth where my injector duty cycle is less and will that cause me to lose power theoretically? Or is the afr/timing more important than the % of methanol being injected after a certain point (diminishing gain by injecting more). That is to say that more is not necessarily better as long as its tuned properly. Sorry just trying to wrap my head around this. My old system is an hfs-1 v8. I think I need to do alot more reading.

MT057, what size injectors and what jetting do you have in the HFS-1 right now?

I am using 780cc injectors and I believe that I am using a .8 and .6 but it could have been a .8 and 1.0 My old tuner put them in about a year ago. The jets have red rings that i can see if that helps at all.

Bright red is a .7mm and dark red is a .8mm. Assuming this combo you are spraying about 670cc. I'm not sure at what RPM this comes on at at WOT, and does it come on at close to WOT or partial throttle settings as well? Anyway, with 780cc injectors and 100% meth, using the same jet with the higher psi pump, you will have 790cc of jetting. Now, at the cut in point, which maybe sooner or at less load than the HFS-1 depending upon how you set it, it will track IDC 1:1 at the cut in point. After that, you can adjust the gain function to add or subtract duty cycle with the slpoe of the line pinned at the cut-in point and hinging from there. You can add or subtract up to 20% plus or minus. I suspect you will have a little less in the midrange than you are used to but more as the revs climb if the trimmers are left in the factory settings. You could go with bigger jets, and trim the gain way down to flatten out the curve to make the unit similar to what you are used to if you like.

One thing to try, is to download the HFS-6 trimmer excel worksheet, and leave the MAP compensation(set to 5v) and IDC trim(12 o'clock position) untouched then you can play with the curves to see what you have now and what different configurations the 3 will give you.

By what you are saying I could ramp it up until the mid range is where I am used to and then lean out the gasoline up top a litte more. I will have to try out that spread sheet.
My current setup kicks on at 12psi and I run about 30psi in third gear from 4500 to 7000 in 4th I hit 32 making my limiter on my ebc go crazy.

Your maximum consuming is around 4 litre of fuel per minute, regardless of DC%.

Please try the following ratios:
100% water ...... 400cc to 600cc per minute
M50:W50 ......... 600cc- 800cc per minute
M100% ........... 800-1000cc per minute

Take 18psi from the chart below and pick the jet combination to suit:

http://www.aquamist.co.uk/forum/gall...H6-jetrate.gif

So useing that chart. Pump pressure 160 psi- 18 psi And needing between 700-800cc I need one .7mm and one .8 mm to run 100 perc meth or one .6 and one .7 to run 50/50

it is OK to over jetting, the HFS-3 can reduce flow electronically.

HFS-3 / Failsafe / Map Switching Output
 

I have been using your System in the Hydramist version. (DDS v8)
I will be interfacing the HFS-3 with a HydraEMS in a Honda S2000 application

I want to use the HydraEMS auxiliary map feature so I would like to know which output from the HFS-3 is equivalent to the MAP-SW2 output from the DDS-v8
This output enables the ECU to use the auxiliary fuel-trim map and allows to run with or without the Water Inj. system on. - I could wire an "external" switch but if it's already available from the DDS3 display gauge then I would like to wire it that way- similar to the Hydramist.

Also which output from the HFS-3 box can be used for a solenoid boost-cut relay when a fault is sensed? This could be a (+) or (-) trigger?
thanks!