1983 D150 / Slant Six the story Continues
Concerning the cam change, the cam in the motor was a 212 / 206 at .050 that I had custom ground at Oregon. It was a fine match for what I wanted, as that cam was set up to provide HP and TQ at low rpm's. I had no intention of trying to make this 4100 lb D150 a high rpm slant screamer. But I found a cam that looked like it would give a little bit more on the low end and I wanted to try it.
Certainly the replacement cam gives up HP and TQ above 4K RPM, but that is not where I drive this D150 anyway.
A chart plotted from Dyno Sim is posted below. I have a Super Flow 110 flow bench. Using real life values for port flow helps the results to be accurate. I have had the D150 on a chassis dyno and those HP and TQ curves were on line with what Dyno Sim had predicted.
Concerning the cam change, the cam in the motor was a 212 / 206 at .050 that I had custom ground at Oregon. It was a fine match for what I wanted, as that cam was set up to provide HP and TQ at low rpm's. I had no intention of trying to make this 4100 lb D150 a high rpm slant screamer. But I found a cam that looked like it would give a little bit more on the low end and I wanted to try it.
Certainly the replacement cam gives up HP and TQ above 4K RPM, but that is not where I drive this D150 anyway.
A chart plotted from Dyno Sim is posted below. I have a Super Flow 110 flow bench. Using real life values for port flow helps the results to be accurate. I have had the D150 on a chassis dyno and those HP and TQ curves were on line with what Dyno Sim had predicted.