Assuming you meant Deadly Re-entry, yes there is. Part of the code or DRE caps the maximum temperature to 1600. Seems to halve it in the case of the 280 model though as I got that up to 1800 degrees without blowing up. Took me a while to figure out why I couldn't have the large engines at more than ~45% thrust ^^; Doesn't compensate for engines at all it seems. Anyhow, if anyone is using deadly re-entry, you need to go to your config file and adjust the Heat production to compensate; 248 for the large engines, and possibly 280 for the fmt40 (didn't seem to be behaving that abnormally to me). The tiny engine is perfectly fine though. Mathematically there should be no difference, but it may need a bit of fine tuning