So this past weekend - the first mission trip towing in the Appalichian mountains! Last trip blew the head gaskets, blew appart radiator, all sorts of stuff failed, heads warped - it was ugly to say the least.
$11,000 over a few months time (
) and 9 months later (this past July 4th Weekend) I'm reloaded and towing back into the mountains.
This time with gauges! Which was a headache in itself. (the Glowshift gauges I bought - where a headache to get installed - first time the mechanic complained the whole time and never did finish the install - then a great guy from the forum came to my house to help - we determined the EGT was either failed or the probe had the wrong resistance. Ended up being the probe resistance didnt coincide with what Glowshift could read. Then Glowshift promised I'd get my gauge back before I left on my trip. By Thursday night it hadnt arrived so I went to TrickTrucks in Edgewater, MD, and on their shelf was a EGT by Autometer they didnt know they had! They made me a great deal on it and it read the probe I had installed - so I have 1 Autometer EGT and the rest Glowshift. 1/2 way through my trip - the Glowshift Boost gauge failed and wouldnt read boost for no reason! Time to save up some money for better gauges!)
I kept the EGT at 1000 degrees - touched off 1100 a few times. I was pulling roughly 9,000 lbs on the hitch - truck weighs 8,000 - giving a total weight of ... 17,000 pounds. Pulling 2900ft mountain climbs - the truck would slow down to 35mph - 40mph - keeping the 1000* EGT.
(granted when I blew the head gaskets in October 2009 on mission - with simular load - I was pushing the truck to maintain 65-70mph up the mountainsides and did not have gauges at the time. I can only imagine what my EGT's had risen to!!!)
Granted the truck made the trip flawlessly - it seemed a bit slow.
First question - what EGT can I safely run at on extended pulls (up mountainsides) without risk of damage to anything in the engine?
2) Why is it when the transmission (5R110) downgeared (in tow/haul mode) the EGT's decreased while the RPM increased??? I understand the lower gear - higher RPM correlation - but If the RPM increases - wouldnt that mean the engine is working harder? Why did the EGT go down?
3) I've got a 4" turbo back exhaust with kitty delete (diamond Eye exhaust), Banks, and ARP studded engine - what else can I do to pull mountains with better performance without risk of damaging something? The truck has 214,600 miles on it and runs on 35's. I really cant afford to break anything else. I was thinking adding a water/meth kit - I have an AEM kit sitting on a shelf in my house.