MI5 Persecution: BBC+ITN=MI5 23/7/96 (1556)
From : Annonymous
Q: roy wrote but the heat will continue to penetrate the tube heating the air. probably end upat about the same temp as the stock system or darn close to it.. it would have to penetrate at a rate fast enough to heat the air in the time it takes for that air to pass through it. plastic does not conduct heat very well. it takes time. one hour or 5 hours wont make a difference. i dont think you grasp thermal dynamics in heat transfer. what matters is the rate of heat transfer through the tube wall along with the amount of time the air spends in contact with the tube. what i do grasp is that it will make not enough of a difference on a stock truck to justify the cost of it. and once again that would depend on the system. some stock systems are not all that bad and the gains from going to a performance aftermarket one will be minimal to the point of not even being measurable but there are some factory ones that in a word suck and these are the ones that they take their claimed improvements from and where real gains can be seen. -- if at first you dont succeed youre not cut out for skydiving .