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Going to 180 degree thermo, what about my fans?

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Old 09-10-2010, 08:11 AM   #1
maxsideburn
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Default Going to 180 degree thermo, what about my fans?

Will my fans still engage properly or will I need to get a tune for them to work right?
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Old 09-10-2010, 02:06 PM   #2
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keep the stock Thermostat. it wont do anything to help.
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Old 09-10-2010, 04:16 PM   #3
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yes it will. from what I've been reading it should be like retarding the timing 1-1 1/2 degree, which I need right now since I've been getting pinging with the SCT chip I have.

So...will my fans still engage at the right time?
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Old 09-10-2010, 08:49 PM   #4
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I been running one without tune for awhile with no problems.
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Old 09-10-2010, 09:27 PM   #5
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A 180* T-stat is going to keep the engine 20* cooler than the stock 200* T-stat but to get the full effects of the T-stat you need to adjust you fan high, low settings so they come on 20* sooner than before. Because of this if you're in stop and go traffic your fans will be working a lot more. Once I think your over 33mph your fans don't even come on anyways. Putting in a 180* t-stat shouldn't be put in because you think it will be a performance mod because you won't even know you have it in. You might get maybe an extra degree of timing but that's it. It will only help the longevity of the motor.

This was what I learned from Cliffyk on the subject.

Oh and even though running the fans more is bad and they will mostly likely fail sooner, they are only like $50-60 from your local parts store to replace.
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Old 09-11-2010, 08:50 AM   #6
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once again I'm trying to get that extra degree of timing to stop some pinging, so I think this might be a good idea.
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Old 09-11-2010, 10:07 AM   #7
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The PCM will see the cooler engine as an opportunity to increase spark advance. It may not do this to any great extent depending on the tune, however it will not retard it. Beyond that you will gain very little with regard to resistance to detonation by changing the thermostat. The real fix is to alter the timing (and/or AFR) in the tune.

Running a lower temperature t-stat can often allow a bit more aggressive spark advance in climates with high ambient temps. Here in Florida with 93 octane fuel it let's me go another 1° or so on the global spark adder in the summer; and it doesn't get cold enough in the winter for the 180° thermostat to have any downside (this may be true where you live as well).

If the fan speeds are not changed there will be no gain from the faster opening thermostat in situations where the fan runs (this only happens on my '03 GT during periods of extended idling, such as in stop-and-go traffic, etc.). At any speed over 33 the fan typically doesn't run anyway, over 40 the it won't run at all as tune won't allow it.

I ended up reducing the fan on/off settings by only 10°; because with the 20° decrease it ran unnecessarily, far too often, and was annoying. There are 4 scalars that need to be changed low speed on and off, and high speed on and off.
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Old 09-11-2010, 01:42 PM   #8
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Quote:
Originally Posted by maxsideburn View Post
yes it will. from what I've been reading it should be like retarding the timing 1-1 1/2 degree, which I need right now since I've been getting pinging with the SCT chip I have.

So...will my fans still engage at the right time?

If you have an SCT chip the fan settings/tune was designed for a 180 thermostat unless someone turned the fan settings back to stock.
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Old 09-11-2010, 03:18 PM   #9
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Quote:
Originally Posted by nickmckinney View Post
If you have an SCT chip the fan settings/tune was designed for a 180 thermostat unless someone turned the fan settings back to stock.

I would have thought that Bama would tune my car for the stock thermo since I told them my car was stock....if it is tuned for a 180 thermo then that might explain some of my ping, correct me if I'm wrong. I get no ping when I first take off, only after I've reached operating temperature, but I get it with all settings (87 Street, 87 Performance, 93 Race).

I've changed my plugs and fuel filter, also ran some fuel injector cleaner and still getting ping. If I can't sort this out in the next day or two I'm getting rid of the chip.
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Old 09-11-2010, 04:05 PM   #10
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Depends if they just threw the SCT canned settings in there.

If you are getting ping at WOT with all the settings try cleaning/swapping the MAF first. If its reading crappy it will cause WOT ping.
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Old 09-12-2010, 09:27 AM   #11
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On the 93 octane race setting I'm getting ping under load pretty much all the time once I reach operating temperature unless I drive really gentle. Not horrible ping, but it's there.

With the other two settings I get ping only for a split second when I am cruising along and all of a sudden punch the throttle. It's not terrible, but it's still there and that's not good.
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Old 09-12-2010, 12:09 PM   #12
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What grade fuel are you running?
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Old 09-12-2010, 02:03 PM   #13
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87 for the 87 tunes and 93 for the 93 tune.

even running the 93 though I get some split-second pinging when I suddenly goose it even if I'm running an 87 octane tune. At least I think it's pinging. It's a momentary "clattering" sound.

I don't get it at all with the stock tune. Even cruising around in 4th at say 1500rpms if I nailed the accelerator I'd get no pinging at all, but with the chip tunes I get it when I suddenly hit the gas pedal, unless I'm cruising at a higher rpm (2500 or above before I push the pedal hard). Even then on the 93 octane setting I get ping no matter what, any time I push it hard I get continuos pinging.
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Old 09-12-2010, 02:28 PM   #14
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If you run 93 with the "91" or "87" tunes what happens? Have you fully flushed the fuel tank of the "mixed" fuel by running through a tank of 93/?? mix before trying the "93" octane tune? It might not hurt to disconnect the battery for 5-7 minutes to clear the KAM (long term fuel trims, and other adaptive learning stuff).

Also, a comment was made in a previous posting that the "SCT tunes" should have the fan set for a 180° t-stat--if this were so then with the stock thermostat the fan should be running non-stop, all the time the engine is up to normal operating temperature--does it?
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Old 09-13-2010, 10:08 AM   #15
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When I ordered my chip Bama asked what t-stat I was running, I said stock so I'm sure it's set for that.

Even running 93 octane on the 87 Street tune I get some very mild pinging when I suddenly give it some gas.

I'm thinking I'm going to have to go with a handheld unit so that I can make minor changes to the tune myself.
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Old 09-13-2010, 07:23 PM   #16
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If you are getting pinging on your 87 oct tune with 93 in the tank.....call BAMA and tell them to fix your tune. There are a couple other possibilities to consider first......
1. what you are hearing may not be pinging, have a mechanic listen to it.
2. like nick said, you maf may be dirty or some other factor may be causing your car to run lean.

You might also want to hook your SCT tuner to the car and datalog during this pinging to see what the fuel trims are doing and to see how much timing your car is actually seeing.
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Old 09-14-2010, 09:35 AM   #17
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It's not a handheld, it's the chip. Also I've cleaned the MAF.
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Old 09-14-2010, 09:35 AM
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