@svsisu what turbo/wastegate setup do you have on your 1HZ? what are your EGT's like?
I have a stock toyota CT26 turbo/wastegate from an HDT, boost is around 10 psi. I have not really had any issues with EGTs, 2.5" short, straight exhaust that exits just in front of right rear tire I feel helps. I have some notes on temps, but not with me just now. Mostly stay in 600-750 F range at 65 mph on flat terrain, 800-900 on moderate hills or strong head winds, and pulling up long hills at speed I've gotten up to 1200 F briefly once or twice, but they drop immediately with backing off on the throttle. I have an alarm set at 1100 F to be sure I'm alerted if not paying attention. Engine and EGTs most happy on interstate at 65-70 mph. I have a H55 5spd with 4:1 reduction gears in t-case, and 4.11 rear,;going over 70 for any length of time is pretty self defeating all the way around.
Where I have run into problems is with cooling temps after having the IP and injectors rebuilt. Before having those worked on temps were fine, would rise slightly in the mountains on long pulls, but come down very quickly. After rebuild, truck ran like a slow, tired dog in hills and coolant temps would shoot up rapidly on moderate to steep inclines. At sea level, and flat ground nothing apparent, but get up in the hills and I would really need to watch coolant temps, even on overpasses at certain elevations. I often travel for the coast (sea level) to Appalachian mountains (2500-3500 ft), which is mostly a long gradual grade to 1000' then the grades increase quickly. The worst temp problems along this route happen in the 300-700' range. I've come to find out that the shop that rebuilt my IP left out some components in the boost compensator and did not have the fueling set correctly. I have auber gauges and probes for EGT, coolant, and boost, and been happy with them so far. I'll send you PM with some more details.
As you've asked and has been covered in earlier posts you may want to revisit exhaust (make less restrictive), timing and fueling on IP and injectors (can't remember if these have been rebuilt or if you have a boost compensator?), ensure entire cooling system is in good working order. So many variables that are inter-related makes it hard to pin down. Fueling/timing and air to fuel ratio plays a very significant role in this. Sorry for your struggles.
