E-Tec problem: OPINION FROM ONE SMALL SAILBOAT DEALER
 

Billgran wrote:
"Del Cecchi" wrote

Why is it that etec needs special rocket science NASA aluminum that is
really really extra strong and tolerates especially high temperatures in
its pistons? Don't they use normal cast or forged aluminum pistons?





Del,

Then if there were only 2 types of pistons, cast or forged, then why have 2?
Why make a motor that has to use a forged piston with different clearances,
even though they are stronger, instead of cast pistons which are cheaper to
produce? Just make 1 model, and only use one aluminum alloy for every
conceivable engine made or in design. :)

This link might give you some more information:

http://www.pacmaterials.com/technology/Technology.htm

Bill Grannis
service manager


I understand the reasons pro and con for forged vrs cast pistons for
automotive applications. It just struck me as a little ironic that
after all the "discussion" over lean burn and detonation and high
temperatures and all that, that this press thing touting the NASA alloy
use came out.

I had a little trouble figuring out how this alloy is different from
other silicon containing aluminum alloys that folks have been making
pistons out of for years. But that is a press release for you. I am
sure there are differences, but it can't be figured out from the press
release.

--
Del Cecchi
"This post is my own and doesn’t necessarily represent IBM’s positions,
strategies or opinions.”

E-Tec problem: OPINION FROM ONE SMALL SAILBOAT DEALER
 

"Del Cecchi" wrote in message
...



I understand the reasons pro and con for forged vrs cast pistons for
automotive applications. It just struck me as a little ironic that after
all the "discussion" over lean burn and detonation and high temperatures
and all that, that this press thing touting the NASA alloy use came out.

I had a little trouble figuring out how this alloy is different from other
silicon containing aluminum alloys that folks have been making pistons out
of for years. But that is a press release for you. I am sure there are
differences, but it can't be figured out from the press release.



The lean burn and the detonation "static" is only from the karen down under,
not from those who are familiar with the engines and work on them on a daily
basis.

You can feel the difference in the NASA alloy compared to an ordinary
piston. It is more dense and scratch resistant and has a different "feel"
when you heft an E-TEC piston. One of the biggest reasons is the more
controlled expansion so the pistons can be fitted tighter in the cylinder
for less "slap" which results in a much quieter motor. That is one of E-TECs
strong points, at cruise and WOT, it is about the same or even quieter in
some cases as a 4-stroke.

Other companies are using the NASA alloy for a number of uses, including
pistons and engine block castings.

Del, you did see that I added a :) to my previous post when I asked why
not have only one type of piston, right?

Bill Grannis
service manager

E-Tec problem: OPINION FROM ONE SMALL SAILBOAT DEALER
 

"Billgran" wrote in message
...

"Del Cecchi" wrote in message
...



I understand the reasons pro and con for forged vrs cast pistons for
automotive applications. It just struck me as a little ironic that
after all the "discussion" over lean burn and detonation and high
temperatures and all that, that this press thing touting the NASA
alloy use came out.

I had a little trouble figuring out how this alloy is different from
other silicon containing aluminum alloys that folks have been making
pistons out of for years. But that is a press release for you. I am
sure there are differences, but it can't be figured out from the press
release.



The lean burn and the detonation "static" is only from the karen down
under, not from those who are familiar with the engines and work on
them on a daily basis.

You can feel the difference in the NASA alloy compared to an ordinary
piston. It is more dense and scratch resistant and has a different
"feel" when you heft an E-TEC piston. One of the biggest reasons is the
more controlled expansion so the pistons can be fitted tighter in the
cylinder for less "slap" which results in a much quieter motor. That is
one of E-TECs strong points, at cruise and WOT, it is about the same or
even quieter in some cases as a 4-stroke.

Other companies are using the NASA alloy for a number of uses,
including pistons and engine block castings.

Del, you did see that I added a :) to my previous post when I asked
why not have only one type of piston, right?

Bill Grannis
service manager

yes I saw it. And you saw i put "discussion" in quotes, eh? But it did
strike me as sort of funny.

And I saw the page about the alloy. Sorry, not being a metallurgist I
can't tell truth from fiction.

del

E-Tec problem: OPINION FROM ONE SMALL SAILBOAT DEALER
 

Harry,
She is definitely beating a dead horse, but ETec has never had as much free
positive publicity as when she makes one of her anti-Etec posts.

The question I have is why is a small sailboat dealer familiar with Etec. I
would not think a small sailboat woiuld need a 40 hp kicker engine.


"Harry Krause" wrote in message
...
trainfan1 wrote:
K. Smith wrote:

FYI

Evinrude ETEC 50 / 60hp: The third generation of OMC’s Ram Ficht 2
stroke technology, now built by Bombardier. Excellent fuel economy and
compact size, but heavy and expensive. There have been so many major
problems with the earlier versions of this technology, that we just aren’t
yet ready to ask our customers to risk seven or eight thousand dollars
on an intriguing but not yet proven technology. As of late 2005, almost
one third of all Evinrude buyers reported a signIficant problem with
their engine in the first 30 days alone!


So now we know where it's from... one freakin' opinion. Puleeease...

Rob

PS FYI:


Smith is beating a dead horse: the one upon which she rode in.