2.5r hsn 3.75 out
lsn 1.5 out
gap ~1mm
3.3 hsn 4.0 out
lsn 1.5 out
gap ~1mm
This will put you within 3 hours in either direction on the hsn and within 2 hours on the lsn
With the rusty you arent really tuning for best performance just for the best running. either engine is overkill on power for the truck
oh forgot to add, if you are running the pro15 (this defys logic) they like it hot,, i am meaning 290 plus. it is completely crazy the temp range they like. I remember back in the day a traxxxas guy was helping me tune one, got it running good, came in to temp and he said "perfect!" so i asked what temp and he said 310. ran like a top at that temp for a good long time too. yeah it was hard to wrap my head around it too.