Yeh I hear ya re the position Dougal and this too has been the subject of discussion. You are dead correct in what you are saying to gain a true perspective of temps within the engine the probe needs to be pre turbo. To be honest mine is post along with many others just because most aftermarket dump pipes come with a bung prewelded and it is the old human trait of its easier to do there. In saying that I just work on the premise that if the egt gauge shows 550c post turbo it is time to take the foot off a bit. There has also been discussion of backing off at 600-650 post turbo and now in later contemplation this figure is too high for the little ZD30.Quote:
Originally Posted by Dougal
My opinion only of course there will be others who may take theirs to 600-650 but not moir. In relation to the research I did with egr many months ago. At the risk of sounding blase, just search the material from the United States and you will gain an insight. Most Universities have search engines regarding this but even then there are still fans and perhaps this is because of contributing factors of. Cost versus sales and the bottom line, I believe you discussed this anyway and are no doubt correct. My background was in earthmoving machinery and off road vehicle hire and I used keep abreast of developments and I guess I didnt really care in those days about longevity, just reliablity and cost effectiveness as we would just turn the gear over after the money was made and reliabilty became an issue but.............since now directly having to own a vehicle fiited with egr I became very interested in longevity. Hence why I dont like egr. But debatable none the less.
Dougal when you do the research, you may still agree with the concept and most certainly I respect that. Many others concur this in their research.There are authors who back it with their integrity. Mercedes, BMW.I ,mean the list is a whose who. It does the job........but I just think designers and engineers could come up with a better idea. Especially for the vehicles we love, because lets face it we have worked long and hard for them and it is in our interest to keep our 4bys fresh and willing. Let us know what you think because I have enjoyed the discussion as your points have merit,certainly from a cost aspect. Many Many multi billion dollar manufacturing companies utilise egr systems because they had to. Case point they didnt stop selling gear because of egr hey? We just learnt to live with it.
