Those with LS conversions: What kind a of coolant temperature are you seeing?

[XcYZ]

Sounds like you might have air trapped in the system.

With that identical radiator and fan setup, I see 180* ~ 190* with a 180* thermostat. I have very little fluctuation, even when stuck in stop and go traffic in the heat of summer.

[dhutton]

How did you connect the steam vent? I also remember it took a bit of effort to burp the system the first time I filled it. I disconnected the upper hose from the radiator if I remember right.

Don

[CamaroAJ]

if its a stock stat and the ECM hasn't been tuned to turn the fans on sooner then your right about where it should run at 220*. now if its a 180* stat and the fans are tuned to turn on sooner then you may have an air pocket in the system.

[hifi875]

i am running the dual spal fan controller w/a prc radiator and factory 187degree stat. mine won't get to 200 at all. stays between 180-195

[Jr]

I used fans from a 2000 Camaro. My temp never goes over 198.

[Z06vette]

As mentioned above, it doesnt matter what stat you are running if the fans arent turning on until 220, which is about right for stock ecu setting. I too had trouble with air trapped in the system. If the upper & lower hoses are hot when running engine, air is likely not the problem; at least that has been my experience. With a 187 stat you could maybe set the ecu to turn the fans on at 200 & off at 190. Any lower & the fan will likely just run all the time. Let us know what you find out.
Scott

[69x22]

Mine is 195 to 200 degrees, I tied the steam vent into the top of the water pump where the upper hose comes off the water pump.

[Rybar]

Originally Posted by XcYZ

Sounds like you might have air trapped in the system.

With that identical radiator and fan setup, I see 180* ~ 190* with a 180* thermostat. I have very little fluctuation, even when stuck in stop and go traffic in the heat of summer.

Mine runs similar to Scotts, and I would guess air trapped in the system or replace the t-stat. Running a GM t-stat