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On 30 Mar 2005 at 22:18, AMY RARIG wrote: > I have my square in the garage getting the engine rebuilt . I stopped > by today to see how it's going the man said it would be done friday. > he also told me that he got me lower compression heads for it and I > didn't understand why. what is the difference between lower and > higher? I always thought that the higher the more horses. Any thoughs? You can probably get more horses with higher compression, but with modern low octane gas you are better off with lower compression. The reason he "got you" low compression heads is most likely because this is what he could buy today. The difference is just that the modern heads have a step cut in them that makes the volume in the head slightly larger. All type 3s from '72 on came with this same step. It can be machined away, but that would add to your cost and require higher octane gas. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~