GB was closed already.See posts #47. It was located on the WI forum listed on page 1 of this thread. It is a great forum with LOADS of information.

Richard, thanks for the links to the videos as well as the DUD tool. This is starting to make more sense to me on the tuning of such systems. Hopefully in a few months I will be picking up one of these great systems.

 

Damn that sucked. So that means i will have to pay 800+ for a HFS-6?!?

Hope I can get some discounts >.<

 

The Water injection forum was ctreated for anyone who likes to contribute or learn the concept of WAI, caters for all levels. This forum will not have flashing banners or google sponsored advertisment overlays. Sponsored by us as a pure WIA infomation exchanging forum.

We use a small section of the forum to show case and promote our product (not often used). More importantly, this section deals with all Aqamist related problems, tech help, DIY, repairs etc.

The HFS-6 uses the car's IDC signal (value added) for building the basic WAI flow curve. User can now freely re-scale the incoming signal to suit their WAI flow requirement. Manifold pressure compensation is now included, no more reduction in flow due to manifold pressure acting against the WAI.

I look forward to your order in the future.

 

MRRP: 950+120 = 1070. GB was offered at 810.00

Wait for May, where we shall have ample HFS-6s for sale. IDC summer will be packaged for RX7 user at a modest cost.

 

Since FJO is taking so long and I'd have to use an aftermarket pump anyway to run 100% methanol. I'm looking into other systems now. Would the HFS-6 pump be compatible with 100% methanol and would it require a regulator or does it have it built in?

I have a 500R-SP turbo (which is somewhere between a GT35R and a GT40R) and plan to push it to 25-30 PSi (or more if more ponnies are available) and am aiming for 450-550 rwhp on a Mustang dyno. What type of nozzles or injectors that you guys use would I need to support this setup and have a good system? Also, how do the failsafes work to cut boost? Do they tie into the wastegate or have some relieve valve. I am not very familiar with the Aquamist system. Thank you.

thewird

 

Like FJO, we are at the mercy of a the pump manufacturer. We have recently changed from Shurflo to Aquatec (aquatec.com). Pressure has risen from 125 to 160 PSI. This will be our future pump for the HFS-6. Reason for the change was partly due to reported leaks on 100% methanol as well as ability of sustaining higher system pressure of 160 PSI.

As much as I tried to get out of Aquatec, regarding the 100% methanol usage, they said it is methanol resistant.

The pump they supply us has an internal 160psi by-pass valve incorporated. We tested the pump without a surge arrestor (supplied with H6 as stabndard) it was smooth and efficient. I was very impressed. The price of the pump is comparable with Shurflo, about $100.00 retail.

The HFS-6 comes with it own inline valve, flows about 1000cc/min at 160psi. Additional valve assembly can be added at a modest cost under $100.00.

The HFS-6 does not come with an integrated valve/nozzle assembly like the FJO. Add more nozzle to increase delivery. One valve can support up to two nozzles (1000cc/min). Pump can flow in excess of ~1,900cc/min.




HFS-6 monitors the flow full with a inline turbine flow sensor, if the flow falls outside of the user set hi/lo windows, it will cut boost or switch map (if your ECU have such an input). Alternatively. there is a set of "voltage free" change-over contact from an onboard relay.

Here is a user manual for the older HFS-5 system, you can dowloadd it and have a read:
http://www.aquamist.co.uk/V10/HFS-5-v10w.pdf

 

So for my 550cc/1680cc injectors (total: 4460cc) @ 50PSi base pressure I would need 892-1115cc worth of methanol going by the 20-25% rule. Will one valve and 2 nozzles support 1000cc or 2000cc? Should I have 2 valve's so I don't have to run it at the limit type of thing? Please give a recommendation, thank you.

thewird

 

The system will support 1115cc/min with 3x 0.8mm nozzles. (1,245cc/min)

Here is a chart for our nozzles:

 

So one valve and 3 x 0.8mm nozzles? Would the one valve support the 1,245cc/min? Will a triple splitter be available and/or would it be a bottleneck not allowing the full 1,245cc/min? Is there an ETA on the release of the system? Thank you very much for your help.

thewird

 

do i understand correctly that the HFS-6 system can command two valves?

for 100% meth it is excellent to have a max of 14-1500 CC/Min. so maybe three .9 or .8 jets run by two valves?

should someone either wish to spend a tad less or be happy w less delivery they could run one valve and two 1.0 jets for a total delivery of slightly more than 1000 CC/Min.

running a 50-50 mix alcohol and water you are limited by the absolute amount of water as too much puts out the fire so i would guess you would want two .7 jets.

water alone would be on .6 or .7 jet,

taking a broad look at the HFS-6 system... i would say it is every bit as good as the FJO type X Y grid as keying off injector duty cycle makes tailoring AI delivery really simple and as accurate as the fuel map. w the HFS-6 you additionally can add progressive delivery basis the IDC or boost. it couldn't be easier.

your only problem, Richard, will be supplying demand.

howard

 

Just to ease your concern I will do some real time tests next week on three 0.8mm nozzles for you. All April production has accounted for, over 100 systems has to go out. Doyou mind waiting until May?

The HFS-6 is brand new, almost 90% of the components are newly designed. We don't want any silly mistakes.

Here is an image of the HFS-6 inline restrictors, newly designed.



Restrictor are necessary if you match a small jet to the high flow valve as on the HFS-6. Without restrictor, the flow curve is not linear.

 

Looking forward to it. PM'd you about waiting . Thanks!

thewird

 

Hmm sounds great. I shall wait till may for this discount package with the IDC summer =).

Thanks again Richard.

-Eric

 

Howard,
The HFS-6 just sends out PWN signal, the flow control module has on-board electronics to interpret the signal from the HFS-6 control box. So in theory, the HFS-6 (1A) can drive up to 50 valves (20mA).


If you are not using the two valves full flow capacity, you need to put an inline reastrictor to avoid non-linearity.


It is always better to allow more flow as there will be pressure/pumping losses in the system, any system.

True! I will post some cooling capacity charts between water and methanol here later.

It took us a few years to convience people that tracking F-IDC is an sound alternative way for delievery water/methanol. We start this concept in 2003. The HFS-6 is the matured version of the same concept.

I can see no problem from May onwards, I had little time to sleep for the last three months.

 

Howard.

I found the old thread about water/methanol mix properties and copy it to the following forum:

https://www.rx7club.com/showthread.p...05#post9080205

 

I just thought of good failsafe to use with this kit if your ECU doesn't accept external triggers in the shower. Can't we just have the HSF-6 trigger some sort of relay that would cut power to the boost controller, hence dropping boost to wastegate pressure until manually turned back on? Very simple idea but I wouldn't know where to acquire such a relay. Richard any ideas? Maybe Aquamist could offer something

thewird

 

The HFS-6 has three failsafe outputs:

1. The HFS-6 has this relay inbuild for this purpose. The relay contact is "normally
closed" when the engine is running and go open circut when failsafe is activated.

2. There is an direct output to power down a wastegate by-pass valve. drop boost pressure.

3. A 0, 5v and 7.5V output to "switch" map if you can use it.

 

So in my case I would use option 2? The boost controller would receive power from the HSF-6 and in case of a failure, it would be powered off?

thewird

 

Tell me what made is your boost controller. Option1 is what you need. I can give you more details when I know what type of Electronic boost controller you use.

Option2 is for Manual Boost Controller or HKS stepper motor type pf EBC only. You need to purchase a MAC valve in addition.

 

I have a Greddy Profec B Spec II and its pretty popular amongst RX-7 owners as well so the answer would help quite a few people too. My understanding is that if its powered down, boost would return to wastegate pressure. Thanks.

thewird

 

Maybe we could use the GReddy Remote Switching System Harness somehow? A 5V and a 12V version is available but I'm not sure how it works, if just applying voltage changes the boost setting (I think its this one) or if it needs a constant voltage to be switched and then returns to the previous setting when done. Maybe triggering the circuit could also change the setting.

http://www.dikperformance.com/script...idproduct=6197

When the Aquamist detects a problem, will it permanently go into failsafe mode and we have to manually do something to get it out or does it only go into failsafe for X amount of time?

thewird

 

I had a quick read on your link. Based on the short note, it appeared the remote switch requires a momentary volatge to toggle between high and low boost.

I am concerned use this mode of operation if for any reason the toggle action was allowed to get out of sync. If this happens, it will endanger the engine. I would prefer to have a constant voltage

I think the best way to reducing boost is by cutting one of the wire to the boost control solenoid.


Addressing your earlier question about the failsafe reset etc...

The H6 failsafe circuitry has two user adjustable timers:
- Sensitivity of trigger (grace period = 0.1s to 0.6s )
- Delay auro0reset after triggering (auto reset = 1 second to 4 seconds )

 

So your recommending splicing into the boost control solenoid line? This would mean that under normal operation the boost control solenoid is functioning normally and when failsafe kicks in, the connection is cut to the boost control solenoid which will drop the boost?

Could this work identically for the main power line on the boost controller? I think it would be nice to visually see the boost controller dead to know that the failsafe kicked in. Just a preference I think hehe.

thewird

 

Can you tell me how many wires goes to the boost control motor? I found the instruction but the drawing is not very clear. It looks like two wires.

One other question, the instruction mentiones the boost control valve as a motor, is it really a motor? Or just a solenoid valve inside the box.

 

There are 2 wires that goes to the boost control device... a red and a black one.



thewird