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On 31 Dec 2004 at 16:09, Keith Park wrote: > I was unaware that the ID on heater boxes was different over the years... > anyone shed some light on this?? Is this true of the entire tube? I know > that some of the outlet replacements will neck them down. That's my first thought, too. I've never seen any that were actually different inside, although the outside often rusts away leaving the tube thinner, but no different on the inside. A repair end on the pipe WILL be smaller on the ID, but only for an inch or 2. I don't know why they make those SO small inside, as there's no reason for them to be that small, although a slight decrease in the ID of the repair part is necessary. > 60Psi at speed with 10 w40 is good alright, But Id love to know what exaust > valve was in those heads... there are ALOT of cheap ones out there, and Ive > never heard of a VW exaust valve breaking with a new guide. 2110 would have > larger valves so they wouldnt be VW right? Id look at valve quality but I > imagine there a whole slew of things that you would need to be careful of at > that engine size with heat as you have mentioned. Heat is our enemy. Believe it or not, there really is such a thing as too much oil pressure. You just gotta learn to get off the "more is better" train of thought. The late stock 26mm pump is as big as any engine needs. Bigger than that, and you're just wasting HP on pushing the excess oil thru there, and putting more stress on the oil pump shaft. Plus the excessive length pumps have less support for the pump shaft AND they tend to actually be poorer quality pumps. There's a really good section in the Bill Fisher pump on how to make the most of a stock oil pump. It's well worth the read. PLUS, the 25 & 26mm pumps will fit, with any pump cover, including the Berg pressure relief cover, without requiring any modifications to the fan housing. It's a win/win situation. The pressure relief valves in the case release at about 28 psi with warm oil. If you get more than that, it just means that you're overwhelming the system. You may feel better about it, and it may give you some bragging rights, but there really are no advantages that I know of, and plenty of disadvantages. As for removing the stock oil cooler, I've never done it. I'm sure that there are ways that it can be done to some advantage, but I'm also sure that just taking it out and blocking off (or not blocking off) the warm air outlet there will actually get you less cooling somewhere. A lot of research went into the design of those air passages, and just assuming that you can do better by just ripping out the stuff that appears to be in the way is not likely to give the results you hoped for. (Ever wonder why there is that little "barrier" welded to the other side, above 1 & 2?) -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~