Cooling fan mod with turbo timer

[kingjust]

I didn't know where to put this so I figured problem diagnosis would suffice. I have an ebay turbo timer (which works fine, no problems ever) that I have modded the wires to work with an aftermarket alarm. Now this is what I would like to do but can't seem to find the right place to start.

Background: Now, I already have a preset time for the timer to countdown. So when I shut down the car, the timer kicks in still keeping power to the necessary components to keep the engine running at idle. But the problem lies in getting the fans to kick in to cool the radiator down. That is what it doesn't do.

I have been given it alot of the thought to why it doesn't... maybe power to the relay has been cut (not allowing the ecu to turn it on when it reaches that certain temp)... i'm not sure. But if anyone has done something to this effect please let me know.

What I want to do is mod the timer and the rad fans to turn on at full blast when the timer goes into effect.

Can anyone help me on this?

"J"

 

[eboy0]

I'm also interested in knowing how this might be done, good thinking.

 

[Nanan]

Does your "ebay" timer have an aux 12v line out? I assume this is how you hooked up your alarm? I know the higher end TT's such as Blitz, Greddy, and Apexi do have them, I have a Blitz FATT.

Before I had my DSMLink setup to turn on the fans I used the aux 12v line to run a relay that fed power to my cooling fans. I am not going to get into the wiring of this relay set as I have seen similar mods done on this forum before.

 

[kingjust]

I'm also interested in knowing how this might be done, good thinking.

Thanks,

I thought it would be a good idea to have the fans come on to cool down the engine along with sending cooler oil <--- i'm going to be putting on an oil cooler that has a mini fan on it and I want it to do the same thing when the timer comes on!

"J"

 

[kingjust]

Does your "ebay" timer have an aux 12v line out? I assume this is how you hooked up your alarm? I know the higher end TT's such as Blitz, Greddy, and Apexi do have them, I have a Blitz FATT.

Before I had my DSMLink setup to turn on the fans I used the aux 12v line to run a relay that fed power to my cooling fans. I am not going to get into the wiring of this relay set as I have seen similar mods done on this forum before.

That's exactly what I want to do... on the the DSMLink side (I have it also) I don't want it to be running all the time. The ECU can keep tabs on that, it's just when I shut off the car and the timer kicks in, that's when I want it to come one... I was on the relay thought frame also.

I'm not sure about an aux, I actually had to cut one of the wires on the harness and cross it over to the main power side because my alarm would only arm itself when it saw no power coming from the main 12V line, that's whay the timer is feeding off of the accessories cable... at lease that how I think I did it!

"J"

 

[tsunari]

I like this idea so much . . . I think I'll look into it and give it a try (I have a Blitz DCII) and report back with findings

 

[kingjust]

I like this idea so much . . . I think I'll look into it and give it a try (I have a Blitz DCII) and report back with findings

Ok, giving it some hard thought, this is how the mod would go. I havn't done it yet, but in theory it will work.

How is works: Based on the VFAQ radiator fan mod, where you can manually turn it on or off at your leisure, while the ECU can still manage it, to that modification but attach it to the turbo timer 12+V. In essense, when the turbo timer is counting down, you just flip the switch that turns on all the fans (...oil cooler), and while it is a manual switch depending on the TT, the fans will cut off when the timer goes off. I think that will work perfectly... just waiting to do this mod!

KJ

 

[tsunari]

Glad someone finally posted back to this thing, b/c I could not find the thread for the life of me in my subscribed list . . .

Anywho, I've figured out how to hook this stuff up where when you turn the key off, the TT will take over and keep everything running, then as soon as you pull the key out of the ignition, the fans will kick on.

The only issue to this (as it sits now) is if you have remote start installed, the fans will come on as soon as the unit begins to start the engine and will remain on until you put the key in the ignition.

If you guys like this setup, I'll get a write-up going -- just let me know.

On a side-note, for performance applications . . . etc . . . I do not think this mod would be very effective. Why?

Yesterday (after cruising around) I decided to see how effective this setup would be and manually turned on my radiator fans to HI while the turbo timer kept everything running for ~30s. Temperatures came down from around 100C (212F) to ~ 90C (194F) where the TT finally shut things off. I also took note of my oil temps which were ~90C (194F) as well.

Afterwords, I turned the key back to ACC and watched my temp gauges for 5-10 min. The oil temp gauge did not noticeably move from the 90C, however the coolant gauge slowly crept up to up over 100C . . . roughly 110C (230F).

Now shortly after starting the car back up, the coolant temps quickly came back down to a reasonable level, but again the oil temps stayed pretty constant.

So in conclusion, I do not see much benefit to doing this mod with the radiator fans as the temps climb right back up after the engine is off (and coolant stops flowing to the radiator).

However, hooking up an oil cooler fan may be beneficial in this manner. -- to each his own.

 

[kingjust]

Glad someone finally posted back to this thing, b/c I could not find the thread for the life of me in my subscribed list . . .

Anywho, I've figured out how to hook this stuff up where when you turn the key off, the TT will take over and keep everything running, then as soon as you pull the key out of the ignition, the fans will kick on.

The only issue to this (as it sits now) is if you have remote start installed, the fans will come on as soon as the unit begins to start the engine and will remain on until you put the key in the ignition.

If you guys like this setup, I'll get a write-up going -- just let me know.

On a side-note, for performance applications . . . etc . . . I do not think this mod would be very effective. Why?

Yesterday (after cruising around) I decided to see how effective this setup would be and manually turned on my radiator fans to HI while the turbo timer kept everything running for ~30s. Temperatures came down from around 100C (212F) to ~ 90C (194F) where the TT finally shut things off. I also took note of my oil temps which were ~90C (194F) as well.

Afterwords, I turned the key back to ACC and watched my temp gauges for 5-10 min. The oil temp gauge did not noticeably move from the 90C, however the coolant gauge slowly crept up to up over 100C . . . roughly 110C (230F).

Now shortly after starting the car back up, the coolant temps quickly came back down to a reasonable level, but again the oil temps stayed pretty constant.

So in conclusion, I do not see much benefit to doing this mod with the radiator fans as the temps climb right back up after the engine is off (and coolant stops flowing to the radiator).

However, hooking up an oil cooler fan may be beneficial in this manner. -- to each his own.

Leave the turbo timer on for more than 30 seconds. Because if you have an external water temp gauge and sensor... you will notice that it takes about 45 seconds to really start cooling the coolant maybe faster with aftermarket fans. Oil cooler will definitely be a plus, but remember to have a fan with that also. I'm interested in how you got the fans to come on when the keys come out... shit, i'm the OP, so I would defenitely like to know!! Hook a brotha up!!!

Just a side question, how did you feel about the theoritcal layout of mines???

 

[tsunari]

Just a side question, how did you feel about the theoritcal layout of mines???

Yours sounds like it would definitely work, although after melting several 20A fuses for the A/C condenser fan, I decided to take a closer look at the VFAQ and see why I would be melting fuses.

Turns out, the VFAQ kinda "butchers" things to get both fans to come on at the same time. In my particular situation (97 GST 5-speed), what I ended up doing was un-doing the VFAQ mod (read: returned everything to stock), and then all that was needed to switch both fans on HI was to hook up a GND-switch to pin-20 on the ECU. When that pin gets grounded, both fans get turned on in HI mode.

Now if you're still running stock fans, this may/may not kick both fans on in HI (I do not remember if both fan circuits (HI & LO) are energized at the same time, or if it's just one at a time. Either way, with my aftermarket fans, I tied both HI & LO power together and both GND together for each fan so regardless if the ECU wants HI or LO mode on, the fan would come on (it's only a single speed fan anywho).

I'll get some stuff written down and post up a tech article & link to it tonite.

 

[gsx219]

exteme motorsports installed my turbo timer when they finished my motor and the fans stay on with the turbo timer and i like it alot wish i knew how it was done so i could inform you guys

 

[RedTurboEclipse]

Does your "ebay" timer have an aux 12v line out? I assume this is how you hooked up your alarm? I know the higher end TT's such as Blitz, Greddy, and Apexi do have them, I have a Blitz FATT.

I have a Greddy new and old and neither have a 12v line out. I also have installed (check reviews) a ebay timer. And I wouldn't pay over $50 brand new for a turbo timer, but thats me. But anyways, you shouldn't need a aux 12v line out to properly install a turbo timer with an alarm. Just the right knowledge and wiring diagram is all you need.

All my turbo timers, ebay no name, and brand name, have worked perfectly with aftermarket alarms. If the fan is on, while timing down, it will stay on. While timing down, I can arm the car, doors will lock, car is armed, and when timer is done, everything will be good. No relays or anything.

But what I think the OP wants to do is, have the fans turn on when the timer goes in effect. That looks like it will require some advanced wiring.

 

[kingjust]

I have a Greddy new and old and neither have a 12v line out. I also have installed (check reviews) a ebay timer. And I wouldn't pay over $50 brand new for a turbo timer, but thats me. But anyways, you shouldn't need a aux 12v line out to properly install a turbo timer with an alarm. Just the right knowledge and wiring diagram is all you need.

All my turbo timers, ebay no name, and brand name, have worked perfectly with aftermarket alarms. If the fan is on, while timing down, it will stay on. While timing down, I can arm the car, doors will lock, car is armed, and when timer is done, everything will be good. No relays or anything.

But what I think the OP wants to do is, have the fans turn on when the timer goes in effect. That looks like it will require some advanced wiring.

This is what I did to keep my alarm functioning with the turbo timer. First, you have to know what wire allows the alarm to trigger. Why you might ask, because the alarm recongnizes that there is no power to that wire, and will arm when actuated. So, with that said, you know that most turbo timers will use both 12v and accessories wires when installing. So, if you know that your alarm uses acces. for it's power signal, reroute the accessory wire (turbo timer) and just add it to the 12v (splice). Basically, your turbo timer will just keep power to the main 12v wires while the acces. wire will loose power when you pull your key out... hence arming the alarm while the timer counts down. Hope that was clear but it works! KJ

 

[tsunari]

Here's my solution:

http://www.dsmtuners.com/forums/showthread.php?t=269939