[stilov]

So, I had the BMS WW kit...worked great.

Got scared of fires, so I bought a DO tank, tap and some more line. Moved it to the trunk and it worked...not quite as high flow on my gauges my VERY close.

So I ran the tank down to nothing...filled it back up...meth flow is much lower...

I cannot figure it out...I pulled the whole system this weekend, and checked for clogs and kinks in the line. Remounted the pump...which is lower than the tank.

Even when I prime the lines...I only get flow one tick above the halfway mark...

So does anyone have any ideas?

I see no air in the system, I measured the voltage to the pump and I get just over 12v with KOEO priming.

My solenoid comes on and off.

I have sent pics to Terry and he says the set up looks good.

Has anyone had a similar problem?

[pinky_and_me]

Originally Posted by stilov

Remounted the pump...

Do you mean you put it in the trunk?
I've read that those pumps are much worse at pulling liquid than pushing it so it might be possible you running it without liquid did something to reduce it's flow rate and if the pump is still in the engine bay it's much more noticeable?

I've seen parts for the pump (like diaphragm and valves) offered on various sites so maybe those things wear out.

[stilov]

Yes pump is in the trunk... I've been told the pumps rarely go out.

When I moved the tank, I moved the pump. The variance is that I ran it dry...although not excessively.

[spool twice]

when i run it dry, it usually takes another tank of meth and a few open runs to get the system to get back to normal flow. I try not to run it dry to prevent this.

[335okc]

I'm not familiar with bms kit, can you run the pump with the output hose going in a bottle? this will test the pump itself. i ran into this problem with my meth kit before and for me it was the tank tap squishing the hose, but i think this isn't a common problem.

[Josh1a1h]

Can you not leave the pump in the engine bay and have the tank in the boot?

Hope you find a solution asap.

Keep us posted

[stilov]

Originally Posted by spool twice

when i run it dry, it usually takes another tank of meth and a few open runs to get the system to get back to normal flow. I try not to run it dry to prevent this.

Hmmm...I have had this theory as well.

You see I prime the system up to the solenoid, but say I have a bit of hose after with a t and then 2 nozzles. That part still has air in it. How long would it take to push all that air out?

I mean the pump will run and push the meth into a bottle as I do to prime the system.

[JamesM3M5]

Originally Posted by Josh1a1h

Can you not leave the pump in the engine bay and have the tank in the boot?

Hope you find a solution asap.

Keep us posted

The pump cannot suck fluid through that long of a tube very well. It is best to mount the pump lower than the tank and in close proximity.

[Josh1a1h]

Thank you for the response. But with the WW Kit, isnt the pump mounted higher than the tank? But due to the shorter distance, this is ok?

Can you please take a picture of how your boot looks with the pump and tank mounted please.

I was hoping to do the same thing one day. Firstly purchase a WW kit and then eventually move it to the boot.

Good luck with the fault finding.

[JamesM3M5]

Originally Posted by Josh1a1h

Thank you for the response. But with the WW Kit, isnt the pump mounted higher than the tank? But due to the shorter distance, this is ok?

Yes, and yes. Some have reported better meth flow numbers when switching to the trunk mount, since the pump no longer has to suck from a container lower than itself and through 6 feet of tubing.

Getting a lower flow number is just odd. It is possible that the pump wiring is inadequate and/or there is a poor ground for the pump, causing the pump to run more slowly once the OP moved it to the trunk. You only need to wire the relay power (30) to the battery instead of dragging the wire from under the hood, use a high quality 16 or 14ga wire, and make sure the pump grounds to a pre-made post in the trunk. The battery ground stud is a good place.

[stilov]

The weirdest part is that it did flow well at one point with the wiring the same as it is now.

Same power wire/same ground point. If I use a voltmeter and measure the voltage going to the pump with the engine off but key on and pump working...it was just over 12v. I was told its a bit higher when the car is running but that my voltage sounded ok.

[Jeff@TopGearSolutions]

If you have a trunk mounted gravity fed tank, the pump needs to be below the tank.

The only reason a WW tank setup works on this car is because the check valve keeps the line full of fluid (as it draws fluid up to the WW squirters), otherwise under normal circumstances these pumps are not good at pulling fluid, only pushing.

The pulling power is maybe 30-50 PSI but the pushing is 150+ depending on your pump.

As long as you have adequate flow, and your logs look good there is no concern.

You have to remember you are now feeding a line about 10 feet longer then that of your WW kit and some aspects of the line go against gravity.

I had a trunk mount setup for years and it worked flawlessly.

[335okc]

It's not about the voltage, it's about the current. what's the wire size that you use to extend the power/ground from the engine compartment to the trunk?

[stilov]

So how do I measure the current? What can affect it?

I don't recall the wire gauge off hand, but it was working much better with the same wire. And when I moved the tank, I followed some directions mentioning the proper gauge, so I "think" I am ok there.

[335okc]

you can measure current with your run-of-the-mill meter, you just have to do it in series instead of paralel like when you're measuring voltage.

Instead of all this trouble, i think a good step to troubleshoot it is to stick a hose on the output of the pump, put the other hose end in a gallon container, turn on the pump, see how quick the pump can push the meth/water. as a general rule of thumb, the mixture should shoot out with enough force that the hose would kick back (hold the hose )

[stilov]

Well I played with everything again tonight...still seems like the gauge reads low flow.

I understand that the gauge isn't technically a problem. Like Jeff said, however, why the change?

Thats what leads me to believe there is an issue. I mean before, I would run n2o and put the shut off at 75 for meth flow...I don't think it would even turn on at this point...because I never reach the 75 mark.

I used to almost get full swing on the gauge.

[spool twice]

have you run down this tank to near low yet? I'm telling ya, even after priming the system when running completely dry, I never get at least 60% flow until after I run the tank at least 3/4 of the way and re-fill.

[stilov]

Originally Posted by spool twice

have you run down this tank to near low yet? I'm telling ya, even after priming the system when running completely dry, I never get at least 60% flow until after I run the tank at least 3/4 of the way and re-fill.

No I haven't. I mean I have but not without messing with it a ton.

So fill up, prime and go until 1/4 tank and ONLY fill up....NO.

But how can that even be explained? Not that I don't believe you, I hope that is it...

[stilov]

Thought I'd try one more thing...converted back to WW. Gonna drive it and see if I get any better flow.

[trbolexis]

Can you post photos of the pumps currently installed location. It'd be a little more helpful so I can help you rectify your issue.

[stilov]

This is the trunk mount set up...although I don't think the location of the pump is the problem.

[trbolexis]

Pump is definitely lover than the tank. What is your wiring like going to the pump? Are you using a 10G wire for power or GND? Im not clear on the specifics of your setup, just trying to get clarification.

Also, where is your flow sensor located in the system?

Nice bottle warmer. lol