This ... auto trans ?? If so what is your convertor stall ? Where is your trans cooler , and do you have an auxiliary cooler also , factory hemi /auto trans cars did .

Also you said 35 total , is that what it runs best at ? I've been watching a lot of auto related tech these days and the 2nd gen hemis are said to not need as much total as a wedge headed engine ???

I don't doubt for a second that you have a coolling problem as it's creeping up and not stopping- I'm not sure why anyone is telling you 200/205 is ok when it's still climbing. sounds like 200/205 just happens to be the point where you have had enough and stop the madness, not a steady running temp for long periods.

However, it's probably worth looking into if your gauge is correct. Clearly it's accurate enough to tell you that a cooling issue exists but as you embark on the journey of thermostats/fans, etc, it's worth having an accurate reading as you will be comparing engine temps to thermostat open temps vs. size of fans and rads. The temp data point should be as accurate as possible.

the factory gauge in my 68 charger decided to be 30 degrees off after sitting for a loooonnngggg time. A gauge I calibrated many moons ago and I know it was correct back then as 230 and climbing triggered my car's gag reflex and she'd spew all over the ground. Old mechanical gauges, old wiring, old mechanical 5v limiter- old cars, man


I've been down this road with a mild big block in my charger. I believe I have finally solved it with high flow 160 thermostat, a very large fluidyne radiator, opened up core support, dual 1300cfm spal fans, flow kooler waterpump. I'm running a sniper efi that controls the fans individually. It will idle at rock steady 168-170 on just one fan with mid 50s ambient. the proof will be in the pudding soon enough.

many years ago before I ran this setup I ran a be cool direct fit which seemed like a joke to me. this was before the web was a good resource and I picked it out of the summitt catalog. very small rad. best results I ever had with that was no clutch, ghetto flex fan, and a cobbled together shroud.

so

Runs

Who, and how , was that timing spec figured out ?

The flowkooler is for sure very different than a stock style pump. Many more smaller straight vanes on it. I chose it because I'm running a serpentine setup that turns the water pump in opposite direction than stock.

if you end going with electric fans, be careful what you choose. Seems like the CFM ratings they claim are optimistic at best. for example, I run spal 12" fans. rated at 1360cfm each. draws 18 amps. Derale makes a 12" 2000 cfm fan that draws 24 amps. then you go look at some other 12" fans that ive never heard of before.... they claim to move 2000 cfm and draw 9 amps? Even if they had some miracle design, I can't see them outflowing mine by 68% at 50% less amp draw... at 40% of the price to boot! come on!

If it was running well at that timing it wouldn't be over heating.

of all the electric fans out there, i choose OEM units every time. they are super reliable, pull fantastic air, and are relatively easy to wire up.
choose one that fits your radiator size, and make sure your wiring system is up to the task and in perfect condition.
don't be afraid to look at all makes and models to choose a fan setup.
just my opinion. your mileage will vary.

[

So

Yes

It's free and only takes a couple of minutes. Why not try it it can't hurt and you may be surprised. Instead of telling evrybody they're wrong and being sarcastic about it.

Note that for fans, there are (2) spec for current draw..
1 is for the Turn-on surge and 1 is for continuous running.
1 thing to keep in mind is the total current draw which often very high that many don't realize the overall battery/electrical system drain.

Just my $0.02...

Sounds like you should be telling us how to cool your car down. Could make for an entertaining thread…

I can only speck to my experience with my hemi. It would start to get hot sitting in traffic fine on road. I changed the timing from 12 idle with advance to 32 locked out and now can sit in traffic all day in 100 degree weather.

Don't you just love guys that have all the answers but can't figure out their problem.

The OP has spent more time on here telling us we are wrong that it would have taken to just check and report back useful data rather than snarky crap.

I say let Mr. Knowitall figure it out on his own,

Don't you just love guys who contribute nothing but take up space. This is a non productive argumentative post that I had hoped to avoid. Reported to administrators but I guess it's there forum, their choice. I got some great suggestions and thanks to those that submitted them. I'm done with this here because of two legged rectums.

Damn