[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
On 23 Jan 2001, at 16:04, Jaranson, John (J.W.) wrote: > I have to disagree with Jim on this one (I can't believe I actually said > that 8^)) sort of. I agree that with engine "generates" the most heat when > it is moving and under load (such as climbing a grade), but it also has the > most help from airflow to remove that heat. I did a bunch of testing in > Arizona a few years ago to look at undercar temperatures. A typical test > location such as a frame crossmember near the exhaust would have a steady > state temperature of 210 F under normal driving (flat, 55 mph), a steady > state temperature of 330 F under heavy load driving (climbing a grade at 35 > mph), and a short duration spike in temperature of 450 F immediately after > the car was stopped and still idling. I agree with this, but what about the fact that there is air being pumped continuously down from above, over our engines, while we're standing still? It just doesn't seem that the heat has much of a chance to work its way upward against this flow, even when we're standing still. The Ford (can't believe I said THAT!) crossmember doesn't have this advantage. - Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------------------------- Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe