06 SRT8 Charger Pred -U7135 Just recieved my pred!!! are the fan setting readusted when selecting the 93 Performace CAI tune? or do I have to adjust manually?
You need to adjust those yourself. The canned tunes will have the fans set to stock settings. Wondering about the history behind that? They originally had the fans settings in the tunes adjusted for a 180*/185* T-stat. Problem was that some people still had or kept their stock T-stat. Fans were set to come on just over 185* and the T-stat didn't open until 203*... fans ran all the time and then people would have to figure out how to set them back to stock. Often times that involved calling DS or posting or... it was a hassle. If you do have a 185* t-stat and the fans are set to stock... no problem. Car runs at stock temps, but no problem. So they changed the fan settings to stock in the canned tunes. "and now you know the rest of the story"
Right !! SRT 8 Charger 2006 I have a 180 stat KN CAI Magnaflow What degress should I adjust the fan settings ? 20 degree lower on all 6 settings?
Which T-stat did you get? The Valu-craft/Motorad (4128) is actually a 185* T-stat. What you are setting with the predator is the turn ON temperature. When it gets to that temp the fan turns on. The turn OFF temp is 2 - 4 degrees below the turn ON temp. So... I'd set the low speed fans about 5* above the temp your t-stat opens at. If you have it installed already that should be the temp (within a degree) the car runs at when you're cruising down the freeway with it reasonably cool outside. Then you might want to set the high speed fan 10* above that. Maybe less, maybe a lot less. It's a matter of preference. The high speed fans are loud and I find it annoying listening to it all the time in city traffic. Some people set it the same as the low speed fans and both of them just barely above the t-stat open temp. I have mine set not too aggressively with the LS at 192 and HS at 200. You can set the MS anywhere between those two (we don't have MS fans so it doesn't matter). Low MPH is 8 mph or below in case you want to set those differently. Pretty much everybody sets all 3 settings the same (high MPH, low MPH, and AC ON settings). It's easy to change and you can't screw up. If you set them too low then they just run all the time or too often. If you set them too high then the car runs at the fan turn on temps (in town or under load at least).
No, that t-stat should be OK. but I would expect to see temps well below 190 when you're just cruising at highway speeds. Unless maybe when it's over 90 or 100 outside. Our cooling capacity is huge. If the engine isn't under heavy load and has plenty of air coming through the radiator the temps should run right where the t-stat opens. It's enough that the temps would go below that if the t-stat didn't start to close. Going down the highway at steady speed you have both of those. Plenty of air going over the radiator and very little load on the engine. The implication is that your t-stat is opening around 190*. Depends on how ambitous you are. You could take the tstat out, drop it in a pot of water on the stove with a meat thermometer and check it. Watch when it starts to open, look at the thermometer, watch until it's fully open and look at the thermometer again. Or you could just drop a different t-stat in there. I have the valu-craft/motorad 4128 in mine. Fans are set to come on at 192 (maybe I set them at 190 last time?) Cruising on the freeway it runs at 186* (it's a 185* t-stat) I forgot who it is here that runs a 170 or 176* t-stat in a Magnum without any heavy duty engine mods. DadsSRT8? Maybe one of those guys with the lower t-stat can tell us where their's runs.
Thanks - I think I will change it out to 1428 and set range identical to yours. Keeping an engine too cool will do harm? I read our cars are design to run at 203? Do you think I damaged my engine somehow?
NO damage. Worst case is that some fluids don't get up to temp and maybe don't flash off some little bit of moisture or whatever. And if your engine was running too cold it would have thrown a check engine light so you didn't even get to there. I think running the engine around 180 - 190 is ideal. The engine is designed to run up there over 200 mainly for emissions. It's just that your engine doesn't seem to be running cool enough for where it should with that t-stat. I'd think it's just that the t-stat isn't opening where it should. Not that it's broken or not working correctly, just that the thermostat part of it works at around 190*. Don't worry about the fans so much. It's mainly a matter of preference. If you set them too high then you don't run as cool as you could with the t-stat you decide to put in. If you set them too low then the fans run all the time and the temp stays where the t-stat opens at. The main problem with running the fans all the time is that they make an annoying amount of noise... I suppose if you ran them constantly for months it might put some premature wear on them. By the way, if you go with the one I've got it's a 4128, not a 1428 (I think you did a typo).
