Originally Posted by ChicagoX
I believe what you are experiencing is due to the larger volume of liquid acting as a heat sink. It will take longer to heat up, but will also take longer to cool down.
I suggest additional means of extracting heat from the liquid should be employed, such as fans or a larger heat exchanger.
BTW, your insulation job will really help when you run ice in the reservoir by mitigating heat transfer from the motor.
I am running the larger HE from LET - no room to install fans now - It turned out just to be the outside air temp.
This evening after work I went on a "little run" - first south on the highway about 15 miles - nice and easy - then exited Kanan road towards the beach. OAT was 91 deg - got past town - and with no traffic I just got on it hard - I was running around 18-20 PSI and keeping my speed up (no traffic - lots of turns and twists - it was great) to the top of the Santa Monica mountains - IAT peaked at 150Deg - and that's after 7-10 miles of some hard A$$ driving - once at the top, there was a light fog from the Pacific Ocean and the OAT dropped to 70 Deg - so I let off the gas and coasted all the way down to the beach - the IAT dropped quickly to 105 Deg and then after some time got down to 97 Deg.
The IC coolant never gets hotter then 105Deg with this system - I can stick my finger in the coolant at any time - I feel that the actual IC core is only so efficient with the intake air moving so fast.
I enjoyed a little cruz down PCH, then to Malibu Canyon Road and back up to the freeway - where I stopped (I was on empty and sweating it just a bit) and filled up with 100 Octane fuel from the pump. (6.49 Gal) - I'm ready to go again tomorrow after work - then on WED - some Dry Ice testing. This is turning out to be a great mod..
Gotta go check on the status of my headers.....