So im sure if im expecting more from my setup than whats really there or what but heres the deal.
for those that dont know, truck is a built motor/trans with 45% over injectors, stock twins with a reworked stocker that has been rebuilt, port and polish and batmowheel, dual fuelers, 165 lift pump, killer bee engine oil cooler on the front bumper thats been shrouded in and below the cooling stack, stock intercooler, stock gearing and running 37" tires. the tune i run is guessitmated to be around 550-600rwph but i and steve have tweeked and played with the tune to fine tune it in for me dding, towing, and getting the best mpg i can get.
heres what im seeing. When i towed brians reg cab to ABQ a couple weeks back, outside temp was 113*. we again estimated his weight to around 8k. coming to the first few hills, oil temps were 230* and i was hitting 1200* egts REALLY easy in 5th at 70mph. Coolant stayed at 195. as soon as we started hitting the big hills (5-7 miles long depending on hill at 6% grade with lots of twists and turns) is when i noticed things gettin hot. about half way up the hill in 4th gear speed would drop to 65 and egts would be right around 1250 and climbing so id have to keep getting out of it. all the while, oil temp had hit a peak of 275 and water was at 240. by this time i was down to 3rd gear at 50mph and 2800rpm. Mechanical fan was going full blast. this did this on the last two hills till outside temps came down. soon as it was 100* outside, i could hold 5th gear up just about anything with EGTs never getting over 1100.
now at that time, i had not shrouded the oil cooler into the bumper to help direct air into the cooler.
So fastforward to this past weekend. im hauling my toy hauler up to a camping spot up the same hills i had prior to hauling brians truck. my toy hauler was semi empty as we didnt have the zuk in it and it weights in at 8k without the zuk in it. Now outside temps are 107* or so. Again, same deal up the hills accept oil temps are now hit 260* and wont go higher. EGTs will again hit 1200* super easy and im playing with the throttle the whole way up to keep it right at 1250* and no higher. coolant would rise to 230* and hit 240 a few times at the very tops of the hills. all the while im slowed to about 55mph in 3rd gear.
Now, we hit the last big hill above payson and outside air temps have dropped to 75* (elevation is now 6,000ft and a storm had just rolled through and cooled everything off, we missed the rain though). i pulled that whole hill at 65mph and 1200* with oil temps holding 235* and coolant not moving from 195*.
So what do you guys think? am i racking my brain for nothing and its just fricken hot out and cooling stack is just heat soaked? i have no one to really compare off of and to me, i feel i "should" be able to pull the hills at 65mph with that weight on the back no issue but maybe im expecting too much?
for those that dont know, truck is a built motor/trans with 45% over injectors, stock twins with a reworked stocker that has been rebuilt, port and polish and batmowheel, dual fuelers, 165 lift pump, killer bee engine oil cooler on the front bumper thats been shrouded in and below the cooling stack, stock intercooler, stock gearing and running 37" tires. the tune i run is guessitmated to be around 550-600rwph but i and steve have tweeked and played with the tune to fine tune it in for me dding, towing, and getting the best mpg i can get.
heres what im seeing. When i towed brians reg cab to ABQ a couple weeks back, outside temp was 113*. we again estimated his weight to around 8k. coming to the first few hills, oil temps were 230* and i was hitting 1200* egts REALLY easy in 5th at 70mph. Coolant stayed at 195. as soon as we started hitting the big hills (5-7 miles long depending on hill at 6% grade with lots of twists and turns) is when i noticed things gettin hot. about half way up the hill in 4th gear speed would drop to 65 and egts would be right around 1250 and climbing so id have to keep getting out of it. all the while, oil temp had hit a peak of 275 and water was at 240. by this time i was down to 3rd gear at 50mph and 2800rpm. Mechanical fan was going full blast. this did this on the last two hills till outside temps came down. soon as it was 100* outside, i could hold 5th gear up just about anything with EGTs never getting over 1100.
now at that time, i had not shrouded the oil cooler into the bumper to help direct air into the cooler.
So fastforward to this past weekend. im hauling my toy hauler up to a camping spot up the same hills i had prior to hauling brians truck. my toy hauler was semi empty as we didnt have the zuk in it and it weights in at 8k without the zuk in it. Now outside temps are 107* or so. Again, same deal up the hills accept oil temps are now hit 260* and wont go higher. EGTs will again hit 1200* super easy and im playing with the throttle the whole way up to keep it right at 1250* and no higher. coolant would rise to 230* and hit 240 a few times at the very tops of the hills. all the while im slowed to about 55mph in 3rd gear.
Now, we hit the last big hill above payson and outside air temps have dropped to 75* (elevation is now 6,000ft and a storm had just rolled through and cooled everything off, we missed the rain though). i pulled that whole hill at 65mph and 1200* with oil temps holding 235* and coolant not moving from 195*.
So what do you guys think? am i racking my brain for nothing and its just fricken hot out and cooling stack is just heat soaked? i have no one to really compare off of and to me, i feel i "should" be able to pull the hills at 65mph with that weight on the back no issue but maybe im expecting too much?
