well I did the inline thermostat mod and my temperatures were worse!!! WTF???? I guess I'm going back to a factory 180 thermostat. Any idea

 

It's difficult to bleed the system with the stat located between the bleed valve and rad. Any coolant that needs to reach rad goes through a tiny whole and takes a long time.
......

 

Did you drill the 1/8" hole in the thermostat and make sure it was at the top so the air could bleed through? If you did then next I would make sure that it's opening and closing by boiling it on the stove.

Did you get a high flow thermostat or a standard one? I've heard the high flow ones aren't as good because they actually flow too much and allow a lot of temp variation.

 

ouch! sorry to hear that. When you decided to do the inline thermostat, what was your average temperature readings? Have you had any overheating issues?

 

I did the 1/8ths hole on top, regular stant 180 thermostat and bled the crap out of it. Swapped the bleeder to both locations n still the same temps in the 190's (high side). Checked the thermostat in hot water n it works right and is pointed in proper direction. 1st location
Final placeement

 

Well damn lucky, I have mine set up like your first placement. Works like a champ, temps in the 180's to low 190's. Wonder what it is...

 

I'm gonna give it a few more days before I go back factory. I got 200 degrees with the a/c on and 100 degrees outside yesterday.

 

The bleed valve location is better, but the hole you cut for the thermostat is going to give you some issue. A ton of air is going to get pulled through there instead of your radiator. You need to seal it up somehow and I bet you'll see a little difference.

Is it staying in the 190s or popping down into the 180s sometimes? And what kind of temps were you getting with the factory stat in 100 degree weather with the AC on? I find it hard to believe you never hit 200, though the inline should still keep it cooler than that.

 

I would suggest to check your fan shroud. When you close the hood, it might be pressing on to the hose and stopping the fan. I had that issue before. I just replaced to the 180 thermostat with my recent disco I bought and it averages 187-188 entire time but peaks at 199 during heavy NY traffic with A/C on at 97 degrees outdoor temperature. My auxiliary fan not working.

 

I just worked on a D2 with an inline setup. It was running pretty much in the same temp range as my D2's running the 180F Britpart/OEM thermostat.

We're in the 90's here with 100% humidity and on my D2's I see em start off in the mid 180's in the 35-65MPH range. On I-10 it's 193-206F at 80MPH.

On the D2 with the inline it's pretty much the same thing. They mounted the thermostat in your first location, but they don't have a bleeder and the hose thru the fan shroud is in the OEM config with nothing cut or missing from the shroud.

I verified temps via my ScanGauge II.

I'm gonna leave my OEM setup after seeing the inline mod in person.