Luck - a Selection Element?

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ianh1968
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Luck - a Selection Element?

Post by ianh1968 »

The following has been shamelessly borrowed from a book by a well-known
engine tuner. This tuner has spent thousands of hours analysing results of
modifications to a large variety of engines...

It's about camshaft selection, but the discussion is equally valid for
virtually any element of engine tuning.
e.g. Ignition timing, needle selection, or general component choice.
David Vizard, in 'Tuning the 'A' Series Engine' wrote:Luck - a Selection Element?
A problem confronting many engine builders is making the best choice of cam
and valve train components for their engine. Picking up a cam catalogue and
browsing through doesn't necessarily help because of the overwhelming choice
of choices possible. On a single page you may see several cam specs given
and many seem like likely candidates.

<SNIP>

Sure you can ask someone what has worked in their motor. Although that may
seem a simple, sure-fire solution let me assure you it can fail all too often to
produce the best results and if you are racing, nothing but the best will do.

Why is this so?
First, ask youself if the person you are seeking advice from has successfully
built an 'A' Series engine like you intend building and secondly, do you intend
to follow closely the specification that was used?
"ianh1968" adds : "Thirdly, you need to decide if the person giving the advice has
any credibility whatsoever and more to the point, can they actually provide some
scientific evidence or theory to support any advice that they are providing."


Mr. V. continues...
David Vizard, in 'Tuning the 'A' Series Engine' wrote:If there is any doubt on either [any] count then you need to be
armed with the relevant information to make your own decision.
This is a fantastic forum and I have learnt a considerable amount from it.
There is an imense range of knowledge here and many posters go into great
detail in order to help others understand complicated concepts. There may
not always be a "right or wrong answer", however...

Some participants go into virtually no detail whatsoever in their posts and expect
members to just categorically believe whatever they say. The same people are
very often critical of those who do try to provide some supporting information.
Fortunately, when I say "people", the actual number is very small, virtually zero,
in fact. Rather like a dripping tap - The amount of "water" coming out is tiny,
but the sound it makes can be extremely irritating.
nifty wrote: :lol: :lol: :lol: :lol: :lol:
(I rest my case...).

My thoughts are these:
1) Don't believe everything you read on the internet as a matter of course (not even this).
2) You have the choice which sources to trust and which to dismiss.
3) If you go with "someone's" advice and it all goes wrong and you end up with
an expensive engine being wrecked, it will be totally and utterly YOUR fault,
not the fault of the person whose advice you followed (blindly or otherwise).
4) If anyone wants to call me an idiot (or worse), please start the sentence:
"I think you are an idiot* BECAUSE..." ( and then explain why).
*amend as appropriate
5) You can have all the "smilycons" you like, but sometimes the intended context and
the interpreted context can be entirely different.
I never intend to make a post that will cause offence - I'm sorry if I've done this.

Ian
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Spider
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Re: Luck - a Selection Element?

Post by Spider »

Ian,

Great posting mate,

But,

at 1) in your list above - I'm shattered. The Internet isn't just true, it's gospel.

Ahmen.

Though, in all seriousness, just as we shouldn't trust the internet, I haven't always taken or found the printed word to be relied upon 100% either, and sometimes from some very well respected pens too.
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