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Old 08-18-2016, 03:45 PM   #4651
Mitchrod1
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so guy here is the build so fare
2002 subaru wrx
1. JDM ej205 closed deck block from outfront
2. oem crank (new)
3. acl hd race bearings (main/rods)
4. manley H-tuff rods with arp2000 bolts
5. manley turbo tuff 92.5mm pistons 8.5.1
6. ej205 polished heads
7. supertech inconel exhaust / stainless steel intake (std. size)
8. BC single valve spring steel retainers/ steel valve keepers
9. oem 2005 sti cams
10 arp head studs
11. oem intake many
12. moore fuel rails with lines
13. ID 1700cc injectors
14. fmic
15. pte 6262 j bearing turbo
16. full JDM STI drive line OEM suretrac

big list i know. im thinking of adding the hfs4 system to the mix is it worth the money?. anyone running it (im sure your out there lol). was it worth the money and why? would you do it again why? in my case is it worth it or not and why? or is there a better or just a different kit you would use and why? Also if you say no to meth completely why and what or if andything would you use or do instead. this will be a daily driver for a little but will be running to maps, so a cut power and a full power map.

((((( i do know i started a post on this sorry, i didnt see this befor i posted that so i figure this is the best place for my questions.))))))
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Old 08-18-2016, 06:21 PM   #4652
jaxscuby
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Of course water/meth is worth it with the time and money invested in that set up.
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Old 08-18-2016, 06:23 PM   #4653
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There patches out there so you can run 2 different maps and still use stock ecu.
Opensource
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Old 08-18-2016, 08:19 PM   #4654
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I typed up a bunch of reasons why to get the aquamist for Mitch, but my browser just reset & lost it all.


Short version-get the Aquamist if you are going to use water injection vs a flexfuel setup. (I do have the hsf4 on my wrx & had a cooling must previously)

I'd prefer e85/flex fuel, but it's not easily available where I'm at...

I have mine setup to drop to my regular pump maps if failsafe triggers or I have it turned off.(stock ecu, ap)
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Old 08-18-2016, 09:46 PM   #4655
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Quote:
Originally Posted by point78 View Post
I typed up a bunch of reasons why to get the aquamist for Mitch, but my browser just reset & lost it all.


Short version-get the Aquamist if you are going to use water injection vs a flexfuel setup. (I do have the hsf4 on my wrx & had a cooling must previously)

I'd prefer e85/flex fuel, but it's not easily available where I'm at...

I have mine setup to drop to my regular pump maps if failsafe triggers or I have it turned off.(stock ecu, ap)
how do you trigger a failsafe to trigger a map change?

Been looking into this for my setup but the failsafe is what I have issues on. Running a Hallman MBC and don't want the ebcs setup back(hate flutter).
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Old 08-18-2016, 09:48 PM   #4656
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A trigger/sensor in tank, so when water/meth gets too low the ecu gets a signal from controller and swaps to fail safe map.
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Old 08-18-2016, 09:50 PM   #4657
jaxscuby
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So ever hear of partial throttle full boost?
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Old 08-18-2016, 10:03 PM   #4658
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Quote:
Originally Posted by jaxscuby View Post
A trigger/sensor in tank, so when water/meth gets too low the ecu gets a signal from controller and swaps to fail safe map.
but how to program the ecu to change to a failsafe map?

Quote:
Originally Posted by jaxscuby View Post
So ever hear of partial throttle full boost?
more fun that way lol. and its not bad. on a td04 or vf it might hit full boost part throttle but mine isn't bad at all.
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Old 08-18-2016, 10:06 PM   #4659
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So do think 6 psi with the 6262 is the same volume of air from vf turbo at 16 psi?

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Old 08-18-2016, 10:08 PM   #4660
jaxscuby
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The fail safe is controlled the Aquamist controller not the ecu.
The ecu just gets a 5 volt signal and switches boost maps.

Sent from my SM-G550T1 using NASIOC mobile app
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Old 08-18-2016, 10:09 PM   #4661
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Quote:
Originally Posted by jaxscuby View Post
So do think 6 psi with the 6262 is the same volume of air from vf turbo at 16 psi?

Sent from my SM-G550T1 using NASIOC mobile app
nope its more more from the bigger given same psi.


none the less can we get back to the question? I prefer the aquamist q and a thread to be be q and a about aquamist. just wanted to know how the guy with an 08 wrx triggered ecu to switch maps as a failsafe. That would solve any hesitation for me to get a kit.
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Old 08-18-2016, 10:15 PM   #4662
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and got the info I needed elsewhere. Seems like ecutek racerom supports this. thanks for the help
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Old 08-19-2016, 12:13 AM   #4663
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Quote:
Originally Posted by bluemax189 View Post
and got the info I needed elsewhere. Seems like ecutek racerom supports this. thanks for the help
Used cobb Flex fuel rom, aquamist sends 5v to ecu-thinks its 100% ethanol, failsafe cuts 5 v(or unit turned off), ecu thinks 0% ethanol...

The hsf4 has low fluid level failsafe,to low or high flow rate failsafe, and you can wire in a wideband for AFR failsafe. And a few other crazy abilities too.

Trigger & ramp using IDC works really nice. (Or you can use MAP, or even blend the two)
You can even wire it into your IAT & have it add more water if the IAT gets above set number.

It really does it all.

Last edited by point78; 08-19-2016 at 12:27 AM.
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Old 08-19-2016, 10:15 AM   #4664
Mitchrod1
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Quote:
Originally Posted by point78 View Post
I typed up a bunch of reasons why to get the aquamist for Mitch, but my browser just reset & lost it all.


Short version-get the Aquamist if you are going to use water injection vs a flexfuel setup. (I do have the hsf4 on my wrx & had a cooling must previously)

I'd prefer e85/flex fuel, but it's not easily available where I'm at...

I have mine setup to drop to my regular pump maps if failsafe triggers or I have it turned off.(stock ecu, ap)
that is my problem. I wanted to do e85 but my area its like hit or miss and more like miss unless in a city. so it was not a option. plus even if it was just to do that i would need a different ecu to run the cobb flex fuel being my ecu does not have the memory to hold all the mapping. my plans is for the meth to be a safety to the high power map plus give me some extra hp. but the key world is SAFETY so i want it to be a sold system that i can just plug tune, play, fill up, go play again.

i did read a little on here being there is so much info witch is great but will take for ever to read it all. I was thinking of 100% meth Yes or No and why? Keeping in mind i more want this more for the Power but maken it safer for my motor to give it a long life.
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Old 08-19-2016, 10:20 AM   #4665
Mitchrod1
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Quote:
Originally Posted by point78 View Post
I have mine setup to drop to my regular pump maps if failsafe triggers or I have it turned off.(stock ecu, ap)
Im really interested in this too....so if say im full power on full tilt hauling the mail on some ****y v8 lol . and i get a problem i want it to shut down the high hp map so i dont blow-up the motor or need to really be worried other then for the fact, why did it shut down.
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Old 08-19-2016, 04:39 PM   #4666
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Originally Posted by Mitchrod1 View Post
that is my problem. I wanted to do e85 but my area its like hit or miss and more like miss unless in a city. so it was not a option. plus even if it was just to do that i would need a different ecu to run the cobb flex fuel being my ecu does not have the memory to hold all the mapping. my plans is for the meth to be a safety to the high power map plus give me some extra hp. but the key world is SAFETY so i want it to be a sold system that i can just plug tune, play, fill up, go play again.

i did read a little on here being there is so much info witch is great but will take for ever to read it all. I was thinking of 100% meth Yes or No and why? Keeping in mind i more want this more for the Power but maken it safer for my motor to give it a long life.
You don't want 100% meth. That's extremely unsafe for a street car. Methanol is pretty volatile, it will combust very easily. Also adding water helps with knock prevention
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Old 08-22-2016, 11:16 AM   #4667
Mitchrod1
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so im guessing but a 50/50 is what i want to use then or whats the thoughts?
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Old 08-22-2016, 08:07 PM   #4668
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so im guessing but a 50/50 is what i want to use then or whats the thoughts?

Yeah 50/50, just mix it by volume, makes it easier. ("Proper "way is by weigh)

With the 50/50 you get the pre cylinder cooling of the meth & a bump in octane, and it's a fuel=burns. With the water you get the in cylinder cooling.

Plus the 50/50 mix helps with distribution vs a higher water content. (And no worries about freezing if you live in winter land)

You have a front mount= good for meth, you put the jets way down by the outlet, gives the mixture time to do its thing with the air charge. Helps with distribution vs a top mount where the jets are real close to the intake.

I'm not familiar with the 205's ecu, if it doesn't support flex fuel, you can't set it up to switch maps like I have it.

Normally people set it up to cut the boost solenoid, or set the ecu to "limp" mode, something like that to at least shut down if there's a problem.

I've never had a failsafe trigger with the aquamist, other than low tank level. (It wasn't uncommon for my cooling mist to trigger a failsafe on the first pull, then it would be ok after that. It was annoying.
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Old 08-23-2016, 01:24 PM   #4669
Mitchrod1
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awesome great info. I think i will be going with the hfs4 or is there a different kit that would be more suited for me??
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Old 08-23-2016, 02:26 PM   #4670
point78
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The 3 or the 4. The big difference between the two, the 4 can do a little more, like a blended IDC/MAP and an additional failsafe you can wire into your wideband, iat, EGT.

About $100 more, so it depends if you wanna spend the extra money or not for those abilities.

I got a Howerton twin tank with mine. It's $$$$, but it's a really nice package.


Side note-my tank "low level" light finally came on this morning(no idea when I filled it last?).

Time to go get a gallon of distilled water...
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Old 08-23-2016, 04:21 PM   #4671
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You can do blended IDC/MAP with the 3 also. I thought the main difference was the 4 is for DI applications.
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Old 08-23-2016, 05:16 PM   #4672
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You can do blended IDC/MAP with the 3 also. I thought the main difference was the 4 is for DI applications.
Hmm. If you look at the hsf4 controller board it has 2 additional trimmers P/I-R, and AUXF.
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Old 08-23-2016, 09:38 PM   #4673
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Those are the needed inputs for fuel rail pressure and the DI signal for direct injection applications. The only thing added on the 4 is the aux failsafe input. If you're not DI and don't need that aux(0-5v) failsafe, all you need is the HFS-3.
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Old 08-24-2016, 09:02 AM   #4674
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Originally Posted by kellygnsd View Post
Those are the needed inputs for fuel rail pressure and the DI signal for direct injection applications. The only thing added on the 4 is the aux failsafe input. If you're not DI and don't need that aux(0-5v) failsafe, all you need is the HFS-3.
Totally agree that the -3 is all that most would need

BUT-if you don't have DI, you can use those those inputs/outputs for other things.

Being able to have a wideband failsafe was a big selling point for me.

You can input a IAT sensor(or EGT) and have the -4 start to add more water if it's getting to hot.

If you're doing a big hill climb, and you have your ecu turn up the boost as you increase altitude(like I do), with a smaller turbo you can start to run out of the compressor map-using IDC it activates to late. You can use that P/I-R trimmer to have it start adding water before you hit your IDC trigger point.

Things like that-but most people wouldn't need or use them.

(I also have suspicions that there are a few other features built into the system that Aquamist doesn't tell you about...)
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Old 08-26-2016, 12:02 PM   #4675
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I think for the $100 difference im just going to get the hfs4. thanks for the help everyone
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