[HC5120]

Awesome! Thank you for the information!

 

[Sarna March]

This is fascinating. I await seeing that bigger pump in action.

 

[Hellcat_Demon]

I know this is an older post, but I'm installing an FI Interchiller kit and upon reading their info, it seems it is best to go with an aftermarket pump. So, considering this, I was doing some research and came up on this post. You can still only get the CWA400 pump (not the EMP unit), so I was going to go that route. I appreciate the info on the 1.5" to 1" reducer tubes listed. My back is against the wall as I'm trying to get this done before I'm supposed to run my first run of the season at the end of March. So, the more info, the better. If anyone else has any info on this intercooler pump switch, I would love to hear any other info you have.

I also have to figure out the mounting brackets for this new one. @HC5120 Did you have to actually manufacture the brackets or did you say you could modify the stock pump brackets?

I haven't pulled the factory pump out yet. I only had the refrigerant evacuated out of my AC system so I could start cutting lines and such. I need to dump the I/C coolant, so that I can start removing the pump and such. Fingers crossed I get this done in time. :-o

Also, thank you to @ksilovich for the update on the wiring. I'll make sure to wire it as you stated.

 

[HC5120]

I know this is an older post, but I'm installing an FI Interchiller kit and upon reading their info, it seems it is best to go with an aftermarket pump. So, considering this, I was doing some research and came up on this post. You can still only get the CWA400 pump (not the EMP unit), so I was going to go that route. I appreciate the info on the 1.5" to 1" reducer tubes listed. My back is against the wall as I'm trying to get this done before I'm supposed to run my first run of the season at the end of March. So, the more info, the better. If anyone else has any info on this intercooler pump switch, I would love to hear any other info you have.

I also have to figure out the mounting brackets for this new one. @HC5120 Did you have to actually manufacture the brackets or did you say you could modify the stock pump brackets?

I haven't pulled the factory pump out yet. I only had the refrigerant evacuated out of my AC system so I could start cutting lines and such. I need to dump the I/C coolant, so that I can start removing the pump and such. Fingers crossed I get this done in time. :-o

Also, thank you to @ksilovich for the update on the wiring. I'll make sure to wire it as you stated.

As you know, the wiring was posted above. The bracket you have to make yourself. Same with the reducer, unless you can find one online. We didn't look for one, just made one. The CWA400 is clocked right, so where the lines go in and go out works just fine. I had problems with running the BMR ice tank/expansion tank as I could not keep air out of the system (though others seem to not have any problems with the BMR tank, so who knows what the issue was). I switched back to my stock tank and have not had any problems with it again. I will put the CWA pump back in sometime in the future, since I have the bracket and the reducer to do it and now know how to wire it, but at this point I'm leaving the HC the way it is and working on another project.

You can read threads on the interchiller. From what I understand (from reading the FI install directions), you do need a certain amount of coolant capacity to optimize it, and the stock system is less than that. But others who run the FI with a stock capacity system can comment on that, how it works, etc.

I hope some of that helps.

 

[Hellcat_Demon]

As you know, the wiring was posted above. The bracket you have to make yourself. Same with the reducer, unless you can find one online. We didn't look for one, just made one. The CWA400 is clocked right, so where the lines go in and go out works just fine. I had problems with running the BMR ice tank/expansion tank as I could not keep air out of the system (though others seem to not have any problems with the BMR tank, so who knows what the issue was). I switched back to my stock tank and have not had any problems with it again. I will put the CWA pump back in sometime in the future, since I have the bracket and the reducer to do it and now know how to wire it, but at this point I'm leaving the HC the way it is and working on another project.

You can read threads on the interchiller. From what I understand (from reading the FI install directions), you do need a certain amount of coolant capacity to optimize it, and the stock system is less than that. But others who run the FI with a stock capacity system can comment on that, how it works, etc.

I hope some of that helps.

Thank you kindly for the info. I have been reading up on the interchiller posts here on Hellcat.org. I'll have to figure out the bracket(s) this weekend when I receive the pump. Hopefully it won't be as complicated as I think it's going to be. Good news on the clocking of the pump, that will make things much easier.

I'm also working on an additional tank location. I know it is suggested to try and keep it as close to the front as possible to pump the cold water into the S/C instead of putting it into the back and having it "warm up" by the time it gets to the front. Plus, I'm like you, I really don't want to put a tank in the trunk and such.

I already have the line reducers coming as well (1.5" to 1"), so that will make things a bit easier as long as I can fit the reducers back behind the bumper where I need them to be.

Thanks again for the response.

 

[SEO_9C1]

Just an FYI I think you have the CWA400 wired up wrong You cannot use the factory LIN BUS wire. That needs to be removed from the connector and terminated.

What you want to do
Stock -> CWA400
1 -> 4 (Ground)
2 -> 3 (Battery Power)
3 -> 1 (ASD Output = +12v when engine running)
4 -> NA (Lin Bus NOT USED)
Then for pin 2 on the CWA you need to ground it.

The way the CWA400 works is when there is +12/GND on the PWM signal wires it will go into a safe mode and run the pump at 95% speed. Now I dont have this in a car, but we were doing bench testing to use this pump in some of our stand alone kits. And just wanted to try to be helpful as I think I saw your mistake.
View attachment 608952
View attachment 608953
View attachment 608951



Also you will throw a fault code for no communication to the pump, so you will have to go in with HPT and disable that code.

So, just to be clear, if you plug in a CWA400 pump, you WILL throw codes, yes?

 

[Unholy707]

CWA is not needed.

 

[Hossfly]

I have the same issue. It’s not a problem but will only go away if you remove the stock pump. That becomes a problem if you lose the primary pump. The best action is none, you alaways have a backup. Just hit ok when the msg comes up and don’t sweat it.

 

[505_SRT]

Wanted to add to this thread since it was very helpful in my install. Recently purchased the FI CWA400 kit. It comes with a bracket so that it fits into the OEM location.

I tried wiring the OEM harness directly to the new harness as noted above and it would not power the pump. The instructions with the pump say to twist both red wires on the pump and power them via a relay. I ended up putting a relay in between the OEM harness and the pump and that worked out great!

The ASD wire is the trigger for the relay, the OEM red harness is the power source and I connected all grounds together. Runs the pump when the engine is running and turns it off when it's not.

I also have the BMR ice tank and you can definitely see how much better flow there is with the CWA

 

[AshyKnees_707]

Wanted to add to this thread since it was very helpful in my install. Recently purchased the FI CWA400 kit. It comes with a bracket so that it fits into the OEM location.

I tried wiring the OEM harness directly to the new harness as noted above and it would not power the pump. The instructions with the pump say to twist both red wires on the pump and power them via a relay. I ended up putting a relay in between the OEM harness and the pump and that worked out great!

The ASD wire is the trigger for the relay, the OEM red harness is the power source and I connected all grounds together. Runs the pump when the engine is running and turns it off when it's not.

I also have the BMR ice tank and you can definitely see how much better flow there is with the CWA

I recently installed my CWA400 pump as well but now I'm having the issue of my car stalking and dying while driving and idle. Also what did you do with the wires that were previously connected to the stock intercooler pump? Did you jump the wires?

 

[505_SRT]

I recently installed my CWA400 pump as well but now I'm having the issue of my car stalking and dying while driving and idle. Also what did you do with the wires that were previously connected to the stock intercooler pump? Did you jump the wires?

I used those wires to power my relay for the CWA400. I only terminated one of the wires that I didn't need. I don't have issues with my car dying at all. Sounds unrelated to the pump honestly

 

[hellcat.hakim]

Wanted to add to this thread since it was very helpful in my install. Recently purchased the FI CWA400 kit. It comes with a bracket so that it fits into the OEM location.

I tried wiring the OEM harness directly to the new harness as noted above and it would not power the pump. The instructions with the pump say to twist both red wires on the pump and power them via a relay. I ended up putting a relay in between the OEM harness and the pump and that worked out great!

The ASD wire is the trigger for the relay, the OEM red harness is the power source and I connected all grounds together. Runs the pump when the engine is running and turns it off when it's not.

I also have the BMR ice tank and you can definitely see how much better flow there is with the CWA

I appreciate your feedback. I'll also be installing the CWA400 soon. Do you mind sharing details about the relay you used to power the pump? I'm a total newb with electrical work and wanna get this right the first time. Thanks!

 

[DigCat]

View attachment 598091 View attachment 598092 View attachment 598093

Did you run the lines straight to the blower? Do you have a pic of where those lines connect to?