since the rest is just you having hurt feelings, i'll only address whats in red.

the fact that water runs cooler than antifreeze is not opinion. it's fact. less antifreeze = lower temps. this also means less corrosion resistance and lubricity in the cooling system, which are also both factual statements. but just to be redundant, water runs cooler than antifreeze.

 

Welcome to my ignore list ...Mark

 

Pure antifreeze by itself is a poor conductor of heat, and has a lower boiling point than 50/50 - not good for the summer.

Also, it freezes at barely a few degrees below straight water - not good for winter.

It also requires water to activate the corrosion inhibitors.

Not to mention, pure antifreeze is thinner than when mixed with water, and will leak easier. Introducing air, which will eventually lead to corrosion a bit quicker.

The most I would do is 60/40 in deep winter.

Also, the only straight coolant I would run is Evans Waterless, but $$ and availability....

 

Sigh!!!!!!!...Mark

 

During the 1980's Arab Oil Embargo Crisis, I earned much of my living designing run around heat recovery systems, which are basically glycol heat transfer systems. Calculations involve specific heat, which is the amount of heat any given volume of media will hold, viscosity, which determines much of the heat transfer because a more viscous fluid laminates thicker at the transfer surface, where velocity is zero, and insulate it from transfer from the liquid that is moving. More viscosity also causes pumping costs to go up, or velocity to slow down.

The calculate line for any set of circumstances was about 200 characters long. All variables were simple one letter variables to cram it all into a single computer executable line. Input to it included temp, many coil (radiator) characteristics, liquid characteristics, including viscosity and specific heat, circuit diameter and effective length, pump characteristics, etc, etc.

I say all that to state that what Ofelas says in the terms of the vernacular, is exactly correct.

So go ahead and put me on your ignore list also.

 

Not a problem. You're there and I should have put you there the first time that you said "messicans". And just for the record, I didn't deny anything that was said, just that somebody else had beat you to saying what you said, you know dead horse and all? There are now exactly 2 on my ignore list, good ridance...Mark

 

Wow.....why all the hostility. I'm not hear to argue or add fuel to the already fire, but just state that 100% antifreeze is not the best way to go. Although, to each is own so run whatever ya brung is fine with me.

All I really wanted to know more about is j_martin's Mishimoto radiator. Was it really worth it? Was the old radiator in good shape but just not as efficient, or was it clogged up with junk and bent fins? I ask because I'm intrigued by your results, but they're VERY expensive.

That said, I can tow my 14k 5th wheel in 110* weather and the engine temps will generally never crest 215*. Thats certainly not WOT throttle either and I also make sure my EGT's stay under 1200* because EGT's will directly affect the engine temperature in a sustained pull.

 

Stock radiator wasn't plugged, was missing a few fins, but was beginning to leak and was just too far gone to reliably repair. I don't think it was missing much in the cooling department.

Pulling Homestake or McDonald pass in the summer I used to have to pull out about 2/3 of the way up and let things cool down at idle for 20 minutes or so. I no longer stop or pull less than full throttle now.

The other day I ran from Glendo to Casper Wyoming, against 55+ headwinds, pulling the fiver parachute, pretty much floorboarded all the way, and with AC running most of the way. Never overheated. Peeled the 100 mph belly board repair tape I had put on right off.

I would never go back to a stock radiator for over the road long haul operation.

 

Does anybody make an aluminum radiator for the non intercooled trucks that dosent have plastic tanks?

 

What a coincidence. https://www.mishimoto.com/truck-jeep...e-5-9l-cummins

 

Ofelas has a mishimoto in his 91.5 and I know it didn't go in without some hacking on the rad supports. Just an FYI. He posted about it here somewhere

 

Too bad it won't fit the 89-91.5 trucks.

 

Yep, intercooled and non-intercooled are different. This one is for intercooled. The range claimed is wrong.

I did have a warranty issue, which they took care of in a New York Minute. I believe the leak was caused by slightly off upper mounts. I shimmed the replacement.