On Apr 29, 6:12 pm, bandit1...@[EMAIL PROTECTED]
wrote:
> On Apr 28, 5:23 am, Buy_Sell <werksp...@[EMAIL PROTECTED]
> wrote:
>
>
>
> > I read somewhere that a turbocharger alone will cut the engine noise
> > by as much as 80 percent. I mentioned this to my neighbor and he
> > showed me that none of his three diesel trucks had any mufflers or
> > catalytic converters. I was surprised that he could run straight
> > pipes on all of these big trucks and no one has noticed any
> > substantial amount of noise from them. So, this seems like a plus all
> > around. Straight pipes will give your engine the best breathing
> > ability and the turbocharger will help give you more of the power that
> > you are looking for. It won't help with pollution control but it
> > should definitely help with fuel mileage.
>
> > On Apr 27, 7:19 am, Ken Roberts <for...@[EMAIL PROTECTED]
> wrote:
>
> > > Finally, the catalytic converter acts somewhat like a muffler. I
want
> > > this craft to be extremely quiet, so I'm going to have both on it.
> > > The muffler will just be a glass pack or similar, because the prop
> > > noise is going to be hard to get rid of. Making the engine quieter
> > > than the prop will help noise figures, but if you spend too much
money
> > > and weight doing that it will no longer matter until you can drop
the
> > > prop noise.- Hide quoted text -
>
> > - Show quoted text -
>
> One reason they don't sound so loud is that the pipes are vertical
> directing the noise up and the other is that diesel combusts different
> than gas and makes a different sound, as far as back pressure goes
> there are several "flow through" mufflers that keep back pressure to a
> minimum, I don't recommend running straight pipes, remember we are
> trying to keep the noise down not make more, straight pipes on a gas
> motor is louder no matter if you run a turbo or not.
> Pat in sw wa
> Ps. I had two semi's and still have my dump truck so I'm babbling from
> experience.
Speaking of straight pipes:
My friend Rick and I went looking for an I-beam this Saturday. Used
first, of course. I want to put together a walking crane/gantry
crane, it would just make my life a lot easier. Anyway, there's this
guy who works on engines (did some work for me) that I know only as
"dragster Bob." Well, Bob had his dragster up on stands and was
trying to start his new engine Saturday. That's the first time I've
ever seen one up close, and definitely the first time I've touched
one. We obviously lost most of a Saturday there.
In some respects, I was amazed how much noise that thing makes. In
other respects, I'm surprised it wasn't more. You don't hear it so
much with your ears as with your chest.
This is not a top-fuel dragster. It's alcohol powered, they said it
got mid 7 seconds or something, around 170 mph in a quarter.
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