Hey guys, just reaching out before I start spending some money. I have a 2nd gen dodge 5speed 3.73 gears with mild build. I recently bought a 37’ toy hauler that weighs close to 9,000lbs empty. I live in Colorado and when I tow this thing is usually over some pretty serious passes. As summer is here I’m struggling keeping my engine temps under control. I do have a high flow water pump, new oem replacement radiator and 190* thermostat. While pulling up RIO with my RZR in the trailer I got a little out of control on my temps. Probably 225*. My EGTs were getting a little hot at about 1250. My truck was getting hotter sooner with my antifreeze/water ration about 70/30. I took some advice from my father who ran heavy duty diesels for 20plus years and am running 25/75. As he said it will still get hot but not as quick. He was right. Anyone done anything to their truck to keep the temps down that actually worked while pulling heavy? I’m guessimg my truck and trailer combo was close to 24,000lbs when loaded. 

You guys intrigue me talking about the manipulability of the Quad.....  I really dont want to spend more money and go through another learning curve, but it does sound interesting.

 

That said, I dont believe I have an EGT issue either since I can literally hammer down on some hills with my toy hauler in tow and my EGT's will generally hover no higher than around 1200*.  My eyes peeled to the pyrometer too...until the engine temps start to climb and then I back off.  The idea is I've made it to the top before that happens, which is more often than not.

 

25 minutes ago, KATOOM said:

You guys intrigue me talking about the manipulability of the Quad.....

 

I was the same way back when @Yankneck696 (Ed Grafton) was around. He used to talk about how the Quadzilla did so much. Now that I've been in the Quadzilla now for nearly 3 years. I can say I could not go back to Edge product or any canned tuner. What is so amazing about the VP44 truck there is no set one tune fits all. Like my tune will not work for @Akaiser21 because of injector and turbo differences. So why did people with canned tuners expect the same? Hence why fuel, timing and boost management much simpler and much cleaner than any canned tuner on the market. I'll admit the smarty touch is next in line which will do the same thing but limited to only 60 HP (CANBus fuel only). This is a very complex tuner and does much more than Quadzilla can for CR Engines.

 

As I've learn there was so much myth and mystery to the VP44 and ECM that if you get down to it. VP44 only controls 2 things. Fuel amount (duration) and timing. Nothing more. What makes the Quadzilla easy is most of the sensors are not used. We get right back to simple tuning without the complex figuring for other sensors (fuel temp or IAT). Since the majority of the time the engine is fully warmed 190*F you can adjust timing to meet IAT temps by advance the full table +1 or retard -1 your choice. The actual name of the game is lower EGT's (more fire burned in the combustion chamber), slightly higher coolant temps (from the fire being more in the combustion chamber) and lower boost because less of the expanding gases are pushing past the turbo. When you engine load rises past your cruise limit set then you want just enough retarded timing to spool the turbo to build power back again so you can quickly return to the cruise state which typically is much lower engine load (fuel duration). Typically my 65 MPH cruise engine load is 17-19%, timing is 22-23* BTDC, EGT's 500-550*F, boost typically 1-2 PSI. Out of cruise timing drops to 16-17* and boost jumps right up. My 55 MPH EGT's are very low like 400-450*F.

 

Edited June 25, 20186 yr by Mopar1973Man