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On 12 Sep 2002, at 9:50, Brian wrote: > I have to agree completely with Shad on the semi-hemi issue. It is a > completely wrong design for our combustion chambers! The idea will work, > but if you run semi-hemi heads with 6.9CR and 35+ total advance on a stock > engine you will have a nice 40hp motor. And, under load your interal parts > are going to suffer! I have been around enough bergites that are always > struggling with getting carbs to work, suffering from no power, etc. > Rescently several have gone to traditional chambers and can't believe how > easy it is to tune them, drive them and the extra power they have. Theory > and real world don't agree here. You and Shad seem to be agreeing here, but I was under the impression that he was arguing from the theory side and now you're arguing the opposite. Both of you are in a completely different situation from me. I have no interest in the high performance, big buck end of our spectrum. I just want a dependable, somewhat lively car that I can rely on for 100k+ miles. I would not dare to argue that you two are on the wrong track as far as your interest goes. I accept your claim that the semi-hemi is the wrong way to go for a maximum performance engine, simply because I have absolutely no personal evidence to the contrary. Now I'd like you and Shad to tell me what you know, from your experience, that will work for what I want out of my engines. At this point, I suspect that both of you have opinions, but very little experience. The problem is that the parameter space we're talking about has too many dimensions for any one of us to have examined all of it. We must not let ourselves get complacent and assume that the experience any of us has can be extrapolated into the whole realm and still remain valid. I respect the work and the effort that you, Shad, and others have gone to in approaching your goals, and if I should ever decide to follow in that direction I would surely want to consider those things which you have found to work well. In the meantime, I believe this thread was started by someone who asked about building a somewhat lively engine which would last 100k miles. This is something which I belive I have a lot of experience with. OTOH, I have an engine down the basement which I'm building right now. The heads are done, but I realized at the last minute that I had never gotten around to semi-hemi-ing them. Now I don't know what I should do.... What do you suggest I do to keep the compression ratio down so I don't have to worry about the gas I buy? - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/