HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Wire Stock 951 Fans to Ignition?

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Wire Stock 951 Fans to Ignition?

Post  acorad on Thu Feb 26, 2015 1:11 pm

Hi guys, my 951 fans are wired in what I believe is the stock manner, in that they continue to run after the engine is turned off until the temp of the radiator cools down enough, and then they turn off.

I'd like them to turn off when I shut the engine off - is there a quick way to rewire them to do that?

I want to do it because:

1) The fans are so loud and when they continue to run after I turn the engine off it makes the car sound/seem like a POS.

2) I think the fans running after the engine is turned off is probably not necessary with the LS1 (the Camaro it came out of didn't do it).

Anyway, any suggestions?

Andy
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Re: Wire Stock 951 Fans to Ignition?

Post  gdopnt on Thu Feb 26, 2015 7:45 pm

1. Two ways to do that: 1. HP tuners allows you to change when they run as well as what temps they come on and off - meaning when the key goes off so do they. ( I lowered my turn on and off temps because factory settings to me were high).  2. Completely rewire them to shut off when key is turned off.  BTW after the car is off if they are real loud they could be running on high (guess, maybe) . One way to tell is to hit the a/c button then they go on high speed and if they sound the same as when car is shut off that would explain your loud fan

2. My fans didn't run when the car was first shut off with my LS computer. I have HP tuners and I changed it so they did what the Porsche system did although HP Tuners lets me set how many seconds to run after the car shuts off.

I am using the Porsche system to run fans. I pulled the wires back from the radiator temp sensor and tied them in to the LS computer to run them

The easiest way to do it is find someone close to you with the tuning program - that is the easiest..
HP Tuners lets you set - on / off  temps  for high and low speeds.  meaning if low doesn't cool you down by a certain temp it turns on the high speed. When you turn off the car it should run 'low speed' (which is quiet) for 150 seconds then shuts off.  I'm not a master but leaning on the small things.


Last edited by gdopnt on Fri Feb 27, 2015 6:20 pm; edited 1 time in total

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Re: Wire Stock 951 Fans to Ignition?

Post  acorad on Fri Feb 27, 2015 10:54 am

Thanks gdopnt, excellent info.

Andy
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Re: Wire Stock 951 Fans to Ignition?

Post  gdopnt on Fri Feb 27, 2015 6:22 pm

So you like the Audi 5th gear?

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Re: Wire Stock 951 Fans to Ignition?

Post  acorad on Fri Feb 27, 2015 7:43 pm

Love it. People ask me if I notice a difference from stock. And I did, on like the first 2 times I shifted into 5th, I noticed the change. After that, it was simply 5th gear with better freeway RPMs and better gas mileage.

Andy
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Re: Wire Stock 951 Fans to Ignition?

Post  gdopnt on Sat Feb 28, 2015 7:55 am

Im just starting to look for the trans to do that step. thanks.

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Re: Wire Stock 951 Fans to Ignition?

Post  Rich L. on Sat Feb 28, 2015 11:11 am

Andy, when you say "stock manner", do you mean stock Porsche or stock Chevy? If the latter, and your fans are wired into your engine PCM, you can change it with tuning. But if the former, and you still have your stock Porsche thermostat controlling the fans, tuning won't do it.

And it's only the coolest of European cars run fans after shutdown. Wink Personally I want a coolant circulation pump to go with the after-run fans like Audi turbo engines have.

Rich
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Re: Wire Stock 951 Fans to Ignition?

Post  acorad on Sat Feb 28, 2015 2:28 pm

Thanks Rich, afaik, the fans are tied into the thermometer in the rad, and after the engine is turned off the fans turn off when the rad cools down to a certain temp.

Is that the stock Porsche manner?

Andy
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Re: Wire Stock 951 Fans to Ignition?

Post  Arthropraxis on Sat Feb 28, 2015 4:26 pm

I would bet the tempostat in the radiator is wired into the LS computer so the Porsche fan relays control the high/low fan speeds. The only way the fans could continue to run after the car is shut off is if the fans are controlled by a computer. So, as above it will need reprogramming to have the fans turn off at engine shutdown.
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Re: Wire Stock 951 Fans to Ignition?

Post  acorad on Tue Mar 03, 2015 7:47 pm

Thanks Anthro.

Andy
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Re: Wire Stock 951 Fans to Ignition?

Post  gdopnt on Tue Mar 03, 2015 8:48 pm

If the radiator temp switch wires run to the LS computer an then into the Porsche system this is the screen you would use to change the fans in HP Tuners.

The upper half of the fan selection (the drop down box is long so I split it in half)


The lower half of the fan selection



At the very bottom you see how many seconds is in the box. It takes 5 minutes or less to change the setting. The reason you would need a tuner to change the setting is because when you buy the program you get 8 credits. 8 credits means you can change 4 cars. To change multiple cars you pay for different program use. The program with 8 credits is about $650.00

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Re: Wire Stock 951 Fans to Ignition?

Post  Rich L. on Wed Mar 04, 2015 10:11 am

acorad wrote:after the engine is turned off the fans turn off when the rad cools down to a certain temp.

Is that the stock Porsche manner?

Yes. That's how my car operates with just the stock Porsche wiring, thermostat and fans.

Rich
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Re: Wire Stock 951 Fans to Ignition?

Post  acorad on Wed Mar 04, 2015 1:34 pm

Thanks guys!

Andy
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Re: Wire Stock 951 Fans to Ignition?

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