C7/Z06 Man

The tune worked like I first described it in my thread. The stock tune when the car is cold makes all the hp but when fully warmed up not as much where the DS tune reduces that lost when warmed up, it also has a little more pep in its step when pulling away from a light, that was the first time I put down a 1.53 60' on the stock tires (later also with stock tune) and the car idled a little better with the DS. Don't forget you can also turn off that V8/V4 mode if you have an A8 with the stock tune or the DS.

onfire

Thanks. That will be a nice mod when it's released for 2017 !

onfire

Can you use Diablo in the custom settings to tell the ECM the thermostat degrees ?

onfire

Ordered the LMR housing with the LPE L310155307 174F stat. We'll see what happens.

MIGHTYM0USE

Any with the over molded seal IMO all come from the same place, same manufacturer, same manufacturing process, and will fail the same way. I've posted all over about this and described the problem clearly as well as a simple and permanent fix.

https://www.corvetteforum.com/forums...is-repair.html

C7/Z06 Man

Before it went bad the Lingenfelter 170/174 degree stat warmed up about as fast to it's operating temp as the OEM stat and never caused any problems with the ecm settings, any codes, etc. It usually cruised down the highway between 180/182 and of course goes up in stop and go traffic due to the OEM fan settings. I liked it, worked well.

I went with it because it was not too cold like a 160 stat which 'maybe' would set codes. The Lingenfelter would keep the coolant temps 'most' of the time at the drag strip below 194 degrees where the ecm starts to pull timing (1 degree).

onfire

That's why I ordered their 170F LS3 stat for the LMR housing. Some are running the LMR with the 160 without any tuning and without any problems. But the 170 should be a good compromise.

MIGHTYM0USE

if the computer is not adjusted you will eventually throw the code for slow warm up. there is no magic way around it.

onfire

Hopefully a 174F will be close enough to the threshold.

C7/Z06 Man

This is my 'understanding' of what DS has in the custom settings to help control coolant temps:

In the custom settings for the 14,15,16 C7s according to DiabloSport they have adjustable coolant fan percent rates starting at the factory "first step" of 192 degrees.

OEM PERCENTS: 192F= 0% fan rate, second ECM step 196F= 0% fan rate, third step 199F= 14.90% fan rate, etc.

My understanding is that the ECM starts to pull timing at 194F= -1 degree of timing. So you could step in at 192F and start adding fan. I believe the DS tune starts adding fan on the second step of 196F= 14.90%

onfire

Great explanation. I'm old school and prefer the low speed / high speed settings vs coolant temps but we'll work with it.

I want to try the 174 stat first and see how it works. DS is not out for the 17's anyway.

Bad Dad

me

Bad Dad

Unless you live in SW Fla where its 92* this week lol LMR 160 T stat 1 1/2 years and no code not tuned yet.

onfire

Great data point. LMR told me they have never had a problem with their 160 without a tune either. But that is the heat of Texas.

My stock stat cruises around 204f at 70mph at 84F. I've watched it idle all over. 199-217ish. Can't wait to try the 174 without a tune.

phantasms

Would a 174 with LMR work untuned without issue in a car that is driven in below freezing winter temps? Serious question.

Thanks!
Best,
Gene

onfire

I'll know this winter. I'm going to guess yes. No one has posted a problem with the 170's setting a code unless the gasket failed. The stat will stay closed until 170 so it should heat as fast to 170 as the 194. If mine does not set a code in 70F, it should be fine.

phantasms

Has anyone else tried installing an LMR 174 with no tune?

BTW how difficult is it to install and swap these things? Could I simply run the LMR174 during the summer and then throw the stock unit on during the Winter?

I have finally completed all the mods I'm looking to do, however it would be nice to keep that temp down so I get to use all that power more often.

Best,
Gene

onfire

Mine is working great. Without a tune it would cruise at 179 to 184. Idled at 194 with the AC on. Easy mod.

Bob U

I'm surprised that no one is make a high quality drop-in replacement thermostat, 10 and 20 degrees cooler then stock. They would sell quickly.

davepl

What's the point?

I don't mean that facetiously, I mean why would I want a colder T-Stat? Colder temps increase wear and decrease power and mileage (not counting intake air, which you want as cold as possible of course).

If the car can't hold the 195F set point, it can't hold the 170. So you'd only see 170 in cases where the cooling system wasn't stressed and the car would have been running 195. If your car is running 205, it still will.

So I don't fully get it, obviously. What's the goal?