larrylu Posted January 22, 2013 Report Share Posted January 22, 2013 Just wondering about the pluses and minuses of going from a 190 degree to a 170 degree stat. What is the benefit and what is the loss? Wonder about maybe doing a compromise of a 180 degree for a DD in a climate that has to deal with some pretty cold temps during the winter months. Are 180's even available? Any thoughts? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 23, 2013 Report Share Posted January 23, 2013 Not sure what temp ranges are available if any other then factory and the 170 degree stat. But I haven't noticed any negative effects from the 170 stat, 3 degrees here today. Plenty of heat. But in summer I notice immediate differences performance wise. Quote Link to comment Share on other sites More sharing options...
larrylu Posted January 23, 2013 Author Report Share Posted January 23, 2013 Not sure what temp ranges are available if any other then factory and the 170 degree stat. But I haven't noticed any negative effects from the 170 stat' date=' 3 degrees here today. Plenty of heat. But in summer I notice immediate differences performance wise.[/quote'] Just guessing but would the theory be that the lower temp stat would cause lower manifold air temp for a denser charge? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 23, 2013 Report Share Posted January 23, 2013 Well yes that would be one reason, but engine temp as read by ECM also effects timing so cooler engine temps allow for more advance timing. Quote Link to comment Share on other sites More sharing options...
Saucemaxx Posted January 23, 2013 Report Share Posted January 23, 2013 Does the change require a change in the tune? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 23, 2013 Report Share Posted January 23, 2013 To take full advantage of the lower temps yes. If your a LMS customer just email Rick for lowered fan setting tune. Quote Link to comment Share on other sites More sharing options...
bigPelo Posted January 23, 2013 Report Share Posted January 23, 2013 Does the change require a change in the tune? From what I know: yes, you need a tune for the 170° thermostat to increase performance. My question would be, do you run a thinner oil? 0W-20 instead of the 5W-30 or something? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 23, 2013 Report Share Posted January 23, 2013 From what I know: yes, you need a tune for the 170° thermostat to increase performance. My question would be, do you run a thinner oil? 0W-20 instead of the 5W-30 or something? No. Stay with 5w-30. There already some rumors of fuel dilution with these motors. If there is any truth to 0w-20 would be dangerously thin. I cant state if lowered coolant temps effect oil temp. Quote Link to comment Share on other sites More sharing options...
RamblinClam Posted January 23, 2013 Report Share Posted January 23, 2013 So to save the $60 on a 170 t-stat, why not just tune the fans to come on at a slightly lower temp using the stock 190 t-stat? Quote Link to comment Share on other sites More sharing options...
larrylu Posted January 23, 2013 Author Report Share Posted January 23, 2013 Well yes that would be one reason' date=' but engine temp as read by ECM also effects timing so cooler engine temps allow for more advance timing.[/quote'] Thanks Crash for the "Stat 101" course. This sounds like an interesting mod for me to explore. I think Rick is the source for the 170 degree stat so it will be easy to request the file at the time of order. Is that fan tune the one where the fan noise becomes much more noticeable? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 23, 2013 Report Share Posted January 23, 2013 Your welcome and yes they do. Answer to turning fans sooner without changing thermostat. Wouldnt do anything as the thermostat will hold water in engine until the thermostat opens at water ever temp it's designed to. The fans only cool what's in the radiator. I was a bit skeptical at first about this mod, but I notice a change and I believe it's a worth while mod. Quote Link to comment Share on other sites More sharing options...
mjhpadi Posted January 23, 2013 Report Share Posted January 23, 2013 So to save the $60 on a 170 t-stat' date=' why not just tune the fans to come on at a slightly lower temp using the stock 190 t-stat?[/quote'] Simple answer is because with the 190 themostat it will remain closed and not allow circulation of coolant until engine temperature reaches 190, whereas with the 170 thermostat it will open at 170 and allow the coolant to circulate to maintain the cooler temperature. Quote Link to comment Share on other sites More sharing options...
KP23 Posted January 27, 2013 Report Share Posted January 27, 2013 Is there a thread on how to bleed the system when installing the thermostat? ( or if that is necessary?) Quote Link to comment Share on other sites More sharing options...
bpd1151 Posted January 27, 2013 Report Share Posted January 27, 2013 I never bled mine, and I installed it on my own. If you're careful, you barely even spill 1/2cup of coolant out at most. Sent from my DROID3 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 28, 2013 Report Share Posted January 28, 2013 yeah your quick you will lose very little coolant, or could open drain on driver side radiator and let out a little coolant. Quote Link to comment Share on other sites More sharing options...
racerx78 Posted January 28, 2013 Report Share Posted January 28, 2013 Is there any DIY to install the stat? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted January 28, 2013 Report Share Posted January 28, 2013 No not as of yet, maybe someone planning on doing theirs can put one together. But it is simple straight forward proceeder. Quote Link to comment Share on other sites More sharing options...
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