Water through Intake Manifolds

Well I took *F temps of the I.M. front split (FS) to runners 1&2 and the rear split (RS) to runners 7&8, using an infrared temperature gun, in park with the hood up.
Starting at 9:40 a.m. at idle, choke closed, the FS was 66.5* and RS was 64*.
At 9:45, choke 3/4, idle, FS=69*, RS=65.4*.
At 10:02, choke open, idle, FS=136*, RS=124*.
At 10:07, about 1500rpm, FS=171*, RS=136*.
At 10:14, engine off, FS=161*, RS=149*. End of test.
It pays to measure.

So it looks like there is plenty of heat and I'm glad I blocked off the exhaust port into the I.M.. Like others have said, there's not much need for more heat to the I.M..