WORKING turbo timer, without a turbo timer :-)

Discuss the RB20, RB25 and RB26 series engines.
Acecool
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Joined: Fri Sep 08, 2006 3:38 pm
Car: 1989 Nissan 240SX Hatch Pig KA24E 126k

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So, I have successfully wired up a turbo timer, without having to spend money on a turbo timer..

How?

Basically, when I wired up my electric fans, I wired a coolant temp switch/sensor into the upper radiator hose

The coolant switch sensor thing was from the lower radiator hose :-)

Anyway, I wired constant power into that, and I ran a wire from the switched 12v power source from the rb20 main power feed black/red wire into the other side of the switch....

From there, I wired it into an inline fuse, from there I wired it into my fans....

Now, when the car is hot - and I take the key out, the car idles for about 1 minute with the fans running before it shuts off :-)

It is awesome!


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fast_s14
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Joined: Sat Aug 14, 2004 2:52 am
Car: 94 300zx

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thats an awesome idea, i never thought about that before.

Acecool
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Joined: Fri Sep 08, 2006 3:38 pm
Car: 1989 Nissan 240SX Hatch Pig KA24E 126k

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Here is a video of how I did it in response to celikaboy or whatever on youtube!

http://www.youtube.com/watch?v=INw3KOXa0og

The reason it works, because the constant on power goes through the switch and up the switched power, so that power is continuous keeping the motor running... and then once it cools down enough it shuts off :-)

Total cost of doing it this way... ummmmm $3 for the inline fuse and wires... the rest was there :-)

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BoostFab
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cool idea; true DIY. good job.

AxiOn419
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Joined: Mon Sep 12, 2005 5:52 pm
Car: 1991 240sx SE Super-Hicas w/ RB20DET
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While I agree you did a good job I still cant see this replacing a turbo timer, especially if you live in a cold climate area.

There have been times when I drove my car for a good distance but its so forkin cold outside that the electric fans didnt even need to come on. So if your water coolant is relatively "cool" after driving around in COLD weather, you turbo will ultimatley suffer when you turn the key off. Even a cold climate can not cool off that boiling hot oil thats just sitting in the turbo lines. The purpose of the turbo timer is to let oil run through the burning hot turbo at idle speeds in order to cool down the turbo so the oil does not start "coking" which is basically just baking oil which sludges up the oil lines.

Someone correct me if my thinking is incorrect.

This was not a knock on you Ace, just looking at the situation from a different angle. Again, good job on the DIY approach though

Acecool
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Joined: Fri Sep 08, 2006 3:38 pm
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That is true... this will not work in a cooler environment.....

I am in SC, and it is still pretty warm here which is why this works...

I will be getting a timer eventually, but not yet.. need tires first :-)

gawdzilla
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you're pulling a lot of amps through that coolant switch... probably want to use a relay or something instead of just a fuse

AxiOn419
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Acecool wrote:That is true... this will not work in a cooler environment.....

I am in SC, and it is still pretty warm here which is why this works...

I will be getting a timer eventually, but not yet.. need tires first :-)
Ahh, I live in Augusta Georgia, so I am right on the border of SC, and there have been a few nights here that have been freezing cold. The weather has been a bit strange lately though.. last night felt like spring

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nizmo zilvia
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Joined: Thu Jul 07, 2005 5:09 pm
Car: 95 240sx w/ S14 SR20 Blacktop

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If you think you guys have it pretty bad try living in the North East or Chicago area. At times it can be 5 - 10* outside. And yea Im jealous you guys have a warmer location.

Great job on that. I might have to do it myself too.

240z4u
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Joined: Mon Feb 21, 2005 4:47 am
Car: '95 Nissan 240SX

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Yeah a relay would be wise.

If you have been running your car hard, IE at the strip 1 minutes is NOT enough cool down.

I had a buddy who had a turbo timer set for 2 minutes and coked up his turbo. he raced alot though.

Just a tip, otherwise good idea'

Acecool
Posts: 1348
Joined: Fri Sep 08, 2006 3:38 pm
Car: 1989 Nissan 240SX Hatch Pig KA24E 126k

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I ran it semi hard with some cheap oil at first, then seafoamed it, now have synthetic in there...

Runs like a champ except the slight sputter around the 4k range which I will be borrowing a friends dremel to resolve :-)

Josh

duffman1278
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Good work man! niice


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