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<x-charset iso-8859-1>Hello- > KeithP=> What were your problems with your T4's?? > > The head design is weak, Absolutely false. It uses a cross-flow design, which is superior. It was designed from the start to be "dual port," so the ports are far more direct. It has LOTS of fin area. And, since the exhaust ports are on the bottom, the sides of the heads can actually cool! It has a wider bore spacing, so bigger cylinders AND thicker walls are possible (my 102mm cylinders have a 6.5mm wall on them). > and very few people have a clue as to how to keep > seats in them other than blind luck (and I'm not dealing with amateurs > here). Again, my experience has found this to be absolutely false. FAT, Rimco, Headflow Masters, Boston Engine, etc. ALL know how to do it, and it isn't hard! The factory used cheap sintered metal seats. On the larger-valved T4 engine, this bit them in the butt. First part of the solution: don't use them :-). We use machined metal seats. And, we install them with a good interference fit. This is all common knowledge, and it works. > There are far more complex parts to go south on you, often making > diagnosis difficult. For instance, I was once stuck in the panhandle of > Idaho (America's largest superfund site) for a week till I with some help > figured out the (relatively new) fuel pressure regulator had very slowly > failed, allowing massive overfueling. That's a failure of the D- or L-Jet FI systems (depending on your vehicle), not the T4 engine. Bugs and T3's share the same problems... I'll give you that the design offers > many advantages over our 1940s-style blocks from the '60s, and some people > get lucky, but it did not have anything as like as much time in production > to work out the bugs, Development started in ~1965. Production began in 1968. Production ended in 1983. That's 15 years of production... that's not bad at all. > and probability in my experience is that your cost per > mile with a Type 4 will be substantially higher. It depends how you drive it. The harder you push it, the more and more expensive a T1 becomes. Take care, Shad Laws LN Engineering http://www.LNengineering.com ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/ </x-charset>