Hi:
Just back from a 19,000km idi trip to Alaska. 6.9 ran just fine. On the long hard hills it pulled a little hot on the pyro so I had to back off. Has anyone retarded their timing after the hypermax install as per instructions from Hypermax. Pump up 3 flats. It had an 11' slidein camper pushing a lot of wind. 3" exhaust straight thru muffler. c6 3.54
Just back from a 19,000km idi trip to Alaska. 6.9 ran just fine. On the long hard hills it pulled a little hot on the pyro so I had to back off. Has anyone retarded their timing after the hypermax install as per instructions from Hypermax. Pump up 3 flats. It had an 11' slidein camper pushing a lot of wind. 3" exhaust straight thru muffler. c6 3.54