- Apr 24, 2004
Say what now?65-70MPH on a D2 is where the grill opening/radiator surface area reaches the tipping point of where it's no longer effective at keeping the temps stable. Not saying she's gonna blow by any means, but temps will start to creep past those speeds especially on a modified and lifted D2. I can cruise 55-60MPH and never break 193F with the HVAC on full blast, but speed up to 65-75MPH and the temps will go up to 206F range and sometimes 210F depending on the load on the engine (mountains/hills or hauling heavy cargo).
Inline mod makes it act more like a D1 and it certainly can idle for longer periods of time before the temps start to rise.