Quote:
Originally Posted by UFO
I understand about the diesel EGR, it controls NOx emissions, but limits the life and efficiency of the engine. I have removed the EGR in every diesel I've owned. A coolant preheater is a good idea, but I suspect you will not get good performance from a simple coolant coil. I would explore real heat exchangers, I suspect there are some out there specifically for gas-liquid heat transfer in the proper size for your exhaust.
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I'm going to have to weigh out all of the options. I could potentially build the down pipe from steel all the way up to the coiled section which would be v-banded aluminum with aluminum coils to help heat transfer.
On a side note, I figured out a way to use the aluminum spindles. The bodies of the mk5 shocks are 55mm while the mk4 shock bodies are only 50mm but the threads at the top are the same. By using MK5 front coilovers with mk4 bushings, I can physically mount them up, leaving the only challenge to be getting back a 5x100 bolt pattern. I'm sure that my machine shop could mill down and press the mk4 bearings into the mk5 bearing housings for me.
I am also playing with the idea of using a MK5 rear haldex/subframe set-up in order to use an aluminum golf R subframe.. because "F it". I'm going to cut out the floorboards of my MK5 parts car in the rear and keep them just in case.
I wound up having some emergency jobs come up at my shop which meant I didn't get to get much done on the Jetta but I am almost finished with all of the subframe mounts.