Tune needed if changing thermostat?
02-16-2013, 08:50 AM
#4
I like the lower temps, it is good on the wiring, it is good on heat soak, it is good on a lot of things.. Think of an oven being under the hood. Any temp drop is a good thing..
To answer the original post.
A tune is suggested. There are a few things that need to be changed.
One is to make it so you don't throw the code for too cold of an engine.
Second, you need to lower the activation temperatures for things like idle learning, and closed loop operation. They are important.
Third thing is for the Fan on and off temp need to be modified to match your target.
All very simple changes, but important.
02-16-2013, 11:49 AM
#5
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Save yourself the trouble and don't change it. You
gain nothing on most motor setups. Fix the fan settings,
upgrade the radiator, clean the thing more than once a
decade, and you're good.
gain nothing on most motor setups. Fix the fan settings,
upgrade the radiator, clean the thing more than once a
decade, and you're good.
02-16-2013, 12:31 PM
#6
Depending on how the vehicle is used, it does help. Heat is the enemy and any 30deg drop in ambient temps cant hurt. It isn't like it is a 500 dollar mod, it is 14-30 bucks..
I like the lower temps, it is good on the wiring, it is good on heat soak, it is good on a lot of things.. Think of an oven being under the hood. Any temp drop is a good thing..
To answer the original post.
A tune is suggested. There are a few things that need to be changed.
One is to make it so you don't throw the code for too cold of an engine.
Second, you need to lower the activation temperatures for things like idle learning, and closed loop operation. They are important.
Third thing is for the Fan on and off temp need to be modified to match your target.
All very simple changes, but important.
I like the lower temps, it is good on the wiring, it is good on heat soak, it is good on a lot of things.. Think of an oven being under the hood. Any temp drop is a good thing..
To answer the original post.
A tune is suggested. There are a few things that need to be changed.
One is to make it so you don't throw the code for too cold of an engine.
Second, you need to lower the activation temperatures for things like idle learning, and closed loop operation. They are important.
Third thing is for the Fan on and off temp need to be modified to match your target.
All very simple changes, but important.
Like jimmyblue said above, you gain nothing on most engine setups. If you're worried about the engine running hot, get a bigger, more efficient radiator and clean out the cooling system regularly.
02-16-2013, 01:18 PM
#7
If it is an LS1 I would not change it. I have not found aluminum block engines to make more power at lower temps the way iron block engines do. I first found that with my circle track sprint car engines on the dyno. It made the most power around 200 degrees coolant. At the time I was surprised, but figured it was the methanol fuel, so I stopped trying to keep it as cold for qualifying laps.
Later found the LS1 to respond the same way. The LT1 loves cold water. My race car runs quickest if I can leave the starting line with the water around 90 degrees. I found the LS1 to make the same power between 180 & 210 degrees. I found iron block LS trucks to still like cold water. I tell guys to not go colder than 180 if they feel they must change 'stats. I then set the fans to try to keep it about 190. I can not give you a technical explanation for the block material making that difference, but I have talked to engine builder that have found the same thing.
Later found the LS1 to respond the same way. The LT1 loves cold water. My race car runs quickest if I can leave the starting line with the water around 90 degrees. I found the LS1 to make the same power between 180 & 210 degrees. I found iron block LS trucks to still like cold water. I tell guys to not go colder than 180 if they feel they must change 'stats. I then set the fans to try to keep it about 190. I can not give you a technical explanation for the block material making that difference, but I have talked to engine builder that have found the same thing.
