Fan noise

[jfriese]

I drive my Amphi at Freeway speeds to get to a local lake. The engine
is very noisy at road speed and that made me wonder about what's
making the noise. I suspect most of the noise is actually the fan,
rather than the engine itself. Some time ago, someone mentioned
putting an electric fan on his Amphi. Has anyone done this and
compared the noise levels under both situations? Or, to put it
another way, would switching to an electric fan cut down a lot of the
high speed engine noise?

John Friese

White 67 (CA, IFLOAT2)
Red 67 (being restored)

 

[ericm_60707]

John;

I'm not really a technical person but I know that when I had Dave
install this sound deadening material in my car the drop in noise
level was pretty amazing. It has the added benefit of keeping the
heat level down when the top is up. The heat would come in through
the back seat.

I drive mine at fairly high speed (for an Amphi). The stuff Dave
used was recommended by Gordons. I'm sure you could get it there.

Eric

--- In amphicar-lovers@y..., "jfriese" <jfriese@m...> wrote:
> I drive my Amphi at Freeway speeds to get to a local lake. The
engine
> is very noisy at road speed and that made me wonder about what's
> making the noise. I suspect most of the noise is actually the fan,
> rather than the engine itself. Some time ago, someone mentioned

 

[jfriese]

Thanks for the feedback guys. I'll have to try to drive one of the
Amphi's that have all the sound deadening material in it. I've always
been a bit wary of that stuff since it would hold moisture against the
inside paint, should it get wet. I don't think I'll try disconnecting
my fan to check the noise that way. Someone told me that the German
club owners sometimes put a shield up along the front of the rear hood
to deflect the noise from coming forward.

John Friese



--- In amphicar-lovers@y..., "jfriese" <jfriese@m...> wrote:
> I drive my Amphi at Freeway speeds to get to a local lake. The
engine
> is very noisy at road speed and that made me wonder about what's
> making the noise. I suspect most of the noise is actually the fan,
> rather than the engine itself. Some time ago, someone mentioned
> putting an electric fan on his Amphi. Has anyone done this and
> compared the noise levels under both situations? Or, to put it
> another way, would switching to an electric fan cut down a lot of
the
> high speed engine noise?
>
> John Friese
>
> White 67 (CA, IFLOAT2)
> Red 67 (being restored)

 

[wcapron2001]

Guys,
The issue of fan noise vs engine cooling has been raised many times.
Many people have talked about electric fans to reduce noise. I think
that they are going about it backwards. Here is my idea. Drive the
alternator/generator with a belt off the crankshaft. Drive the water
pump w/fan with an electric motor mounted on the exhaust bracket and
belt. This allows you to spin the fan at the best speed for airflow.
The fan does not make lots of noise until it is cavitating air. At
this point the efficency drops and the noise goes way up. My guess is
that the best speed for the fan corresponds to engine rpm at 40-45
mph. The fan on the amphicar is sized for cooling to be adaquite at
idle and when swimming while being driven by the engine. At 55-60 mph
the fan rpm is way to high. An added bonus is that the fan uses
probably 5 horsepower at highway speeds. Getting that back is like a
12% increase for climbing hills.
Comments?
Bill Capron

 

[a_colo_native]

What about a fan clutch or the flexible fan blade types? Would they
provide the needed air movement and less noise?

John

PS - Any extra air cleaners out there? (Yes, I saw the one on eBay)

 

[tommyintpa@aol.com]

Re: Re: Fan noise

In a message dated 8/19/02 11:59:00 AM Pacific Daylight Time,
minnow@amphicar.net writes:


> What about a fan clutch or the flexible fan blade types? Would they
> provide the needed air movement and less noise?
>
> John
>
Hi John, Am I missing something here? Can't you just take your fan blades
off, and rebolt the pulley. Get a new style electric fan, they are much
quieter than the older fans. Spal makes fans, they have eight blades that are
shaped like a sword from Ail Baba. They make almost no sound and will blow
your Toupee off. So then you will need a fan shroud, no more than a flat
sheet of metal the size of the radiator with a hole in it the size of the
fan. Attach the pusher fan and space it on top of the radiator as far up from
the radiator as the motor cover will allow. The only thing that is even a
little difficult is you need to move the oil cooler, but you can hang it on
the back of the radiator now that the fan is out of the way. Am I not see'n
this correctly?


> PS - Any extra air cleaners out there? (Yes, I saw the one on ebay)

Hi all, About that air cleaner is it for an Amphicar? What is the hose for? I
thought if you use a flame arrester you used a non-vented oil fill cap and
the rocker arm cover has a hose that connects to the flame arrester. Or like
the early cars that use a vented oil fill cap, no hose at all from the top of
the rocker arm cover and on flame arrester. Neither type uses a hose from the
air filter to anything. Just wondering?
Tommy in Tampa


[Non-text portions of this message have been removed]

 

[jfriese]

Hi Tommy,
There is no hose fitting on the flame arrestor. On cars with a sealed
oil cap, the hose goes from the rocker arm cover to the air cleaner,
outside of the filter material.

John Friese
67 White
67 Red


--- In amphicar-lovers@y..., tommyintpa@a... wrote:
> In a message dated 8/19/02 11:59:00 AM Pacific Daylight Time,
> minnow@a... writes:
>

> Hi all, About that air cleaner is it for an Amphicar? What is the
hose for? I
> thought if you use a flame arrester you used a non-vented oil fill
cap and
> the rocker arm cover has a hose that connects to the flame arrester.
Or like
> the early cars that use a vented oil fill cap, no hose at all from
the top of
> the rocker arm cover and on flame arrester. Neither type uses a hose
from the
> air filter to anything. Just wondering?
> Tommy in Tampa
>
>
> [Non-text portions of this message have been removed]

 

[Bill Norris]

Re: Re: Fan noise

Professor Friese,

What would you think about a simple small fan clutch to simplify the fan
noise and cut HP loss at highway speed but not when engine needed more
cooling? This is what I'm in the process of testing. I've tried the electric
fans and that requires serious modicacations.
I'll let you know what happens after this weekend. I've installed all extra
updates, alt, RPM, water detector, and also in process of having FM99691UE
engine built up for my red 67. That is 79 Spitfire, with a fan clutch on
water pump.
Give me your thoughts

Bill Norris
----- Original Message -----
From: "jfriese" <jfriese@mindspring.com>
To: <amphicar-lovers@yahoogroups.com>
Sent: Tuesday, August 20, 2002 1:07 PM
Subject: [amphicar-lovers] Re: Fan noise


> Hi Tommy,
> There is no hose fitting on the flame arrestor. On cars with a sealed
> oil cap, the hose goes from the rocker arm cover to the air cleaner,
> outside of the filter material.
>
> John Friese
> 67 White
> 67 Red
>
>
> --- In amphicar-lovers@y..., tommyintpa@a... wrote:
> > In a message dated 8/19/02 11:59:00 AM Pacific Daylight Time,
> > minnow@a... writes:
> >
>
> > Hi all, About that air cleaner is it for an Amphicar? What is the
> hose for? I
> > thought if you use a flame arrester you used a non-vented oil fill
> cap and
> > the rocker arm cover has a hose that connects to the flame arrester.
> Or like
> > the early cars that use a vented oil fill cap, no hose at all from
> the top of
> > the rocker arm cover and on flame arrester. Neither type uses a hose
> from the
> > air filter to anything. Just wondering?
> > Tommy in Tampa
> >
> >
> > [Non-text portions of this message have been removed]
>
>
>
> THE AMPHICAR-LOVERS LIST
> ~~~~~~~~~~~~~~~~~~~~~~~
> Before posting requests for information, please check the List
> Archives:
> http://www.escribe.com/automotive/amphicar/search.html
> For more information about this List and other available services
> visit:
> http://groups.yahoo.com/group/amphicar-lovers/
> To UNsubscribe from this List, just send a blank email to:
> amphicar-lovers-unsubscribe@yahoogroups.com
> Any other issues may be addressed to the List owner (Mike Israel) at:
> amphicar770@yahoo.com
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

 

[Michael Echemann]

Re: Re: Fan noise

John:
There are some arrestors with hose fittings while others go to the air
cleaner.
Mike

----- Original Message -----
From: "jfriese" <jfriese@mindspring.com>
To: <amphicar-lovers@yahoogroups.com>
Sent: Tuesday, August 20, 2002 1:07 PM
Subject: [amphicar-lovers] Re: Fan noise


> Hi Tommy,
> There is no hose fitting on the flame arrestor. On cars with a sealed
> oil cap, the hose goes from the rocker arm cover to the air cleaner,
> outside of the filter material.
>
> John Friese
> 67 White
> 67 Red
>
>
> --- In amphicar-lovers@y..., tommyintpa@a... wrote:
> > In a message dated 8/19/02 11:59:00 AM Pacific Daylight Time,
> > minnow@a... writes:
> >
>
> > Hi all, About that air cleaner is it for an Amphicar? What is the
> hose for? I
> > thought if you use a flame arrester you used a non-vented oil fill
> cap and
> > the rocker arm cover has a hose that connects to the flame arrester.
> Or like
> > the early cars that use a vented oil fill cap, no hose at all from
> the top of
> > the rocker arm cover and on flame arrester. Neither type uses a hose
> from the
> > air filter to anything. Just wondering?
> > Tommy in Tampa
> >
> >
> > [Non-text portions of this message have been removed]
>
>
>
> THE AMPHICAR-LOVERS LIST
> ~~~~~~~~~~~~~~~~~~~~~~~
> Before posting requests for information, please check the List
> Archives:
> http://www.escribe.com/automotive/amphicar/search.html
> For more information about this List and other available services
> visit:
> http://groups.yahoo.com/group/amphicar-lovers/
> To UNsubscribe from this List, just send a blank email to:
> amphicar-lovers-unsubscribe@yahoogroups.com
> Any other issues may be addressed to the List owner (Mike Israel) at:
> amphicar770@yahoo.com
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

 

[jfriese]

Hi Bill,
I wasn't aware that any version of the Spitfire engine had a fan
clutch. A fan clutch, that would fit correctly in the existing
shroud, would certainly be the simplest was to get some noise
reduction. Let me know what happens with your tests. Perhaps you
could send me a couple of photos too. That might help me figure out
some fix for any problems that might occur.

John Friese

--- In amphicar-lovers@y..., "Bill Norris" <wnorris@m...> wrote:
> Professor Friese,
>
> What would you think about a simple small fan clutch to simplify the
fan
> noise and cut HP loss at highway speed but not when engine needed
more
> cooling? This is what I'm in the process of testing. I've tried the
electric
> fans and that requires serious modicacations.
> I'll let you know what happens after this weekend. I've installed
all extra
> updates, alt, RPM, water detector, and also in process of having
FM99691UE
> engine built up for my red 67. That is 79 Spitfire, with a fan
clutch on
> water pump.
> Give me your thoughts
>
> Bill Norris
> ----- Original Message -----
> From: "jfriese" <jfriese@m...>
> To: <amphicar-lovers@y...>
> Sent: Tuesday, August 20, 2002 1:07 PM
> Subject: [amphicar-lovers] Re: Fan noise
>
>
> > Hi Tommy,
> > There is no hose fitting on the flame arrestor. On cars with a
sealed
> > oil cap, the hose goes from the rocker arm cover to the air
cleaner,
> > outside of the filter material.
> >
> > John Friese
> > 67 White
> > 67 Red
> >
> >
> > --- In amphicar-lovers@y..., tommyintpa@a... wrote:
> > > In a message dated 8/19/02 11:59:00 AM Pacific Daylight Time,
> > > minnow@a... writes:
> > >
> >
> > > Hi all, About that air cleaner is it for an Amphicar? What is
the
> > hose for? I
> > > thought if you use a flame arrester you used a non-vented oil
fill
> > cap and
> > > the rocker arm cover has a hose that connects to the flame
arrester.
> > Or like
> > > the early cars that use a vented oil fill cap, no hose at all
from
> > the top of
> > > the rocker arm cover and on flame arrester. Neither type uses a
hose
> > from the
> > > air filter to anything. Just wondering?
> > > Tommy in Tampa
> > >
> > >
> > > [Non-text portions of this message have been removed]
> >
> >
> >
> > THE AMPHICAR-LOVERS LIST
> > ~~~~~~~~~~~~~~~~~~~~~~~
> > Before posting requests for information, please check the List
> > Archives:
> > http://www.escribe.com/automotive/amphicar/search.html
> > For more information about this List and other available services
> > visit:
> > http://groups.yahoo.com/group/amphicar-lovers/
> > To UNsubscribe from this List, just send a blank email to:
> > amphicar-lovers-unsubscribe@y...
> > Any other issues may be addressed to the List owner (Mike Israel)
at:
> > amphicar770@y...
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >

 

[jfriese]

Hi Mike,
Thanks for the information. I have never seen that variation. It's
amazing how many variations were produced on such a simple car.

John Friese

--- In amphicar-lovers@y..., "Michael Echemann" <echemike@e...> wrote:
> John:
> There are some arrestors with hose fittings while others go to the
air
> cleaner.
> Mike
>
> ----- Original Message -----
> From: "jfriese" <jfriese@m...>
> To: <amphicar-lovers@y...>
> Sent: Tuesday, August 20, 2002 1:07 PM
> Subject: [amphicar-lovers] Re: Fan noise
>
>
> > Hi Tommy,
> > There is no hose fitting on the flame arrestor. On cars with a
sealed
> > oil cap, the hose goes from the rocker arm cover to the air
cleaner,
> > outside of the filter material.
> >
> > John Friese
> > 67 White
> > 67 Red
> >
> >
> > --- In amphicar-lovers@y..., tommyintpa@a... wrote:
> > > In a message dated 8/19/02 11:59:00 AM Pacific Daylight Time,
> > > minnow@a... writes:
> > >
> >
> > > Hi all, About that air cleaner is it for an Amphicar? What is
the
> > hose for? I
> > > thought if you use a flame arrester you used a non-vented oil
fill
> > cap and
> > > the rocker arm cover has a hose that connects to the flame
arrester.
> > Or like
> > > the early cars that use a vented oil fill cap, no hose at all
from
> > the top of
> > > the rocker arm cover and on flame arrester. Neither type uses a
hose
> > from the
> > > air filter to anything. Just wondering?
> > > Tommy in Tampa
> > >
> > >
> > > [Non-text portions of this message have been removed]
> >
> >
> >
> > THE AMPHICAR-LOVERS LIST
> > ~~~~~~~~~~~~~~~~~~~~~~~
> > Before posting requests for information, please check the List
> > Archives:
> > http://www.escribe.com/automotive/amphicar/search.html
> > For more information about this List and other available services
> > visit:
> > http://groups.yahoo.com/group/amphicar-lovers/
> > To UNsubscribe from this List, just send a blank email to:
> > amphicar-lovers-unsubscribe@y...
> > Any other issues may be addressed to the List owner (Mike Israel)
at:
> > amphicar770@y...
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >

 

[John Friese]

I drive my Amphicar's on the freeways of California and have been
annoyed by the amount of noise coming from the cooling fan when going
over 50 MPH and I run my cars over 70 MPH at times. I found a way to
reduce the problem quite a bit. Simply change the water pump to a
pump from a 74 Triumph Spitfire. This pump is just like the Amphicar
pump but has a larger diameter pulley and the fan speed is slowed down
which dramatically quiets the fan noise down. When you switch the
pump it is also necessary to switch the fan belt. Instead of a (NAPA
or Gates) 7410 belt, use a 7417.

I wondered if this might reduce the cooling so I did some tests. I
took the car up to a desert lake and ran in at varying speeds from
idle to fast cruise and the temperature needle stayed right in the
center. I also checked it during the climb over the mountain to get
to the lake. No problem. Oh, and I'm running a 1300 engine too.

John Friese

White 67
Red 67

 

[amphipoda]

I've often contemplated the fan noise
issue myself. For example, I'll just be
driving along minding my own `bizness'
and low-n-behold I hear the fan noise.
I look around and sure enough, there's
the fan... yet another Amphi fan. I've
also noted while floating in the water
with Amphi's engine off and I can still
hear fan noise. I look around and sure
enough there's the fan... yet another
Amphi fan. Sometimes I hear multiple
fan noises from different directions.
This can be confusing for both Amphi
and I, but is rarely cause for concern.
We've found that fan noise is actually
a good thing, a welcome audible display
of the wonder that Amphi inspires as
we travel the roads and waterways. So
if you are at all concerned your fan noise
seems excessive... fear not my fine finned
friend... Amphi fan noise comes with the
territory and is music to our ears.

Amphipoda
'64 Turquoise
San Diego, CA

 

[Mike @ BPI Group]

RE: Re: Fan Noise

-------------------------
Michael J. May,
-------------------------
BPI Group Ltd.
13 Davis Avenue, Suite 1B
Poughkeepsie, NY 12603-2407

1.845.471.0800


-----Original Message-----
From: amphipoda [mailto:Amphipoda@yahoo.com]
Sent: Thursday, June 26, 2003 6:25 PM
To: amphicar-lovers@yahoogroups.com
Subject: [amphicar-lovers] Re: Fan Noise


I've often contemplated the fan noise
issue myself. For example, I'll just be
driving along minding my own `bizness'
and low-n-behold I hear the fan noise.
I look around and sure enough, there's
the fan... yet another Amphi fan. I've
also noted while floating in the water
with Amphi's engine off and I can still
hear fan noise. I look around and sure
enough there's the fan... yet another
Amphi fan. Sometimes I hear multiple
fan noises from different directions.
This can be confusing for both Amphi
and I, but is rarely cause for concern.
We've found that fan noise is actually
a good thing, a welcome audible display
of the wonder that Amphi inspires as
we travel the roads and waterways. So
if you are at all concerned your fan noise
seems excessive... fear not my fine finned
friend... Amphi fan noise comes with the
territory and is music to our ears.

Amphipoda
'64 Turquoise
San Diego, CA





THE AMPHICAR-LOVERS LIST
~~~~~~~~~~~~~~~~~~~~~~~
Before posting requests for information, please check the List
Archives:
http://www.escribe.com/automotive/amphicar/search.html
For more information about this List and other available services
visit:
http://groups.yahoo.com/group/amphicar-lovers/
To UNsubscribe from this List, just send a blank email to:
amphicar-lovers-unsubscribe@yahoogroups.com
Any other issues may be addressed to the List owner (Mike Israel) at:
amphicar770@yahoo.com
This list is provided as a free service. Please support our sponsors at:
http://www.growerflower.com/default.asp?id=41762


Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/