On 9/28/07, Robert Keezer <warmerwagen@yahoo.com> wrote: > > Tiico "buzziness" is not due to the angle the > engine is mounted.
Agreed Vibration is an inherent part of the inline-four > engine design.
Disagree, it's inherent to operation of any reciprocating internal combustion engine... the inline-four layout must be "handled" much more carefully than many other engine layouts at design time because they are one of the most troublesome layouts to compensate for when it comes to vibration. But it is the case that there are inline 4 cylinder engines much smoother than samples of any other engine layout, so it is not inherent to one layout over another alone. It it sets you up for more difficulty in design, but it's the specific design/implementation of the chosen layout that has the largest affect, in addition to the quality of manufacture. Correct me if I'm wrong, but the Tiico is a 1.8 VW block with stoker crank to get the 2.0 liters. It is a custom configuration not produced from a VW/Audi design(and the engine on which it is based is also known for vibration issues). A stroker is begging for trouble when it comes to vibration for one because of the change in rod ratio.. which as you point out helped when the inverse happens as in the vibration improvement from the VW made 1.8 and ABA 2.0, and if the reman 2.0 stroker they build isn't balanced well on top of things it is even more noticeable. When I drove one it had a very steady buzz that seemed more tied to just rpm than load, which is another clue. Jim Akiba |
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