Here’s some tech info.
5th gear
65mph 1840 rpm’s
70mph 2000 rpm’s
My water temp the whole trip never got over 185F even with 90F temps in Central Oregon.
My limiting factor on grades/ inclines is EGT. 5th gear I can get almost 20psi boost but the EGT gets to up to 1250F and have to back off. I’m hoping the HX-30W Super with a functioning wastegate will help psi more heat out the pipe but I’m still learning. Aside from EGT the 4BT is a complete beast. It will roll coal like no other in 5th gear when I punch the pedal to pass. If I’m easy no issues with smoke.
Filled up yesterday before trip up Clackamas River. This was distance from Chemult, down to the Crater Lake property, some backroad exploration, back to property 4,500’, back home and trip down Deschutes River 1,500’, drive up to Timberline 6,000’, back home, 1,300’, drive to work, and trip to town.
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324 miles in 16 gallons = 20.25 mpg. My drive up from Government Camp 4,000’ to Timberline 6,000’ was where I lost some good mpg. It’s a 7% grade with corners and it’s hard to get into 4th gear.
Very impressed with Project Snowball❄