PT Radiator Air Scoop

[Scott Forman]

There was some talk a while back about fabricating an air scoop for the
radiator grill on a PT to increase air flow through the radiator. Did
anyone install one? Does it seem to make a difference? How did you
build it?

Scott Forman
86 PT38
Memphis

[Gregory OConnor]

Scott, when the engineered systems will no longer control the heat,
there is issue with the systems. to make things run cooler at more
stress, can only prove to allow more stress than engineered. I pust it
to the limits of heat befor I back off stress. A mod to help overcome
ambient temp influence like the radiator evaporative cooler MikeH uses
is one mod I would like to try.

GregoryO'Connor
94ptRomolandCa



--- In WanderlodgeForum@yahoogroups.com, "Scott Forman"
<scottforman75@...> wrote:
>
> There was some talk a while back about fabricating an air scoop for
the
> radiator grill on a PT to increase air flow through the radiator.
Did
> anyone install one? Does it seem to make a difference? How did you
> build it?
>
> Scott Forman
> 86 PT38
> Memphis
>

[Scott Forman]

I do not have a cooling problem, in fact I just re-cored my
radiator. Just wondering if the scoop could give me the 5 degrees I
need to keep the fan from kicking on...which as we all know saps fuel
economy...during hot weather.

Scott

--- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
wrote:
>
> Scott, when the engineered systems will no longer control the heat,
> there is issue with the systems. to make things run cooler at more
> stress, can only prove to allow more stress than engineered. I pust
it
> to the limits of heat befor I back off stress. A mod to help
overcome
> ambient temp influence like the radiator evaporative cooler MikeH
uses
> is one mod I would like to try.
>
> GregoryO'Connor
> 94ptRomolandCa
>
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Scott Forman"
> <scottforman75@> wrote:
> >
> > There was some talk a while back about fabricating an air scoop
for
> the
> > radiator grill on a PT to increase air flow through the
radiator.
> Did
> > anyone install one? Does it seem to make a difference? How did
you
> > build it?
> >
> > Scott Forman
> > 86 PT38
> > Memphis
> >
>

[Richard Hayden]

Scott, My PT had a SS scoop on it when I got it and I haven't the faintest idea when it was installed. Probably quite some time age. I also re-cored last year. Before the re-core the fan would come on quickly when starting to climb but the temp. never got above 190 deg going up our western "hills". I only noticed that I had a problem when I removed the grill to clean the radiator with Simple Green and the hose that the copper was disintegrating. Thus the re-core. After the re-core the fan doesn't come nearly as often and when it does it only stays on for a few minutes. The temp still doesn't get above 190 deg and now will go down to about 180+ deg on the flat and moderate hills.

I have no idea what caused the scoop to be added, maybe just because it looked nice to the then owner. Actually, I'd rather not have it as it is a little hard to see the trailertires with it on but it is there and I probably won't remove it.

The scoop is made of quite heavy SS and it looks for all the world like it belongs there.

Maybe some others will tell of their experiences before and after without a scoop for comparison. I knowthat several have re-cored within this past year or so.

Dick Hayden - '87 PT 38 - Lake Stevens, WA

----- Original Message -----

From: "scottforman75@gmail.com"

To: "WanderlodgeForum@yahoogroups.com"

Sent: Wednesday, August 06, 2008 3:51 PM

Subject: [WanderlodgeForum] PT Radiator Air Scoop

There was some talk a while back about fabricating an air scoop for the
radiator grill on a PT to increase air flow through the radiator. Did
anyone install one? Does it seem to make a difference? How did you
build it?

Scott Forman
86 PT38
Memphis

[Leroy Eckert]

First the scoop will not cool the radiator any quicker or cooler or reduce the fan on off sequence because the water temp is controlled by an instrument *Alarmstat* designated by BB. It the radiator is plugged up it ain't gonna cool, scoop, extra fans or anything else. On most coaches through 1994 there is an Alarmstat which senses the water temp and activates the fan to high mode and back to idle mode constantly if the fan override and the chassis a/c is off. It cycles between -+ 8 degrees. It was specified by BB at 195 degrees. Accordingly, the fan in idle mode spins between 200 and 600 rpm at engine rpm values 800-2100 rpm according to my BB manuals. So, if the radiator is not clean and good massive amounts of air will do not good the result being the fan will cycle more often. In high mode, chassis a/c on; or fan override on; the fan runs at approx. 1800 rpm. The only thing that will stop the fan high/idle mode sequence timing is a new radiator. It makes a lot of sense. Bad radiator, no air flow, no efficient cooling. A scoop is not going to help a bad radiator. It is that simple. Of course it may help for a bit if you remove the Alarmstat, let the fan run constantly and you may see some reduced temps. I have jacked with my bus using VMSpc for quite some time and I cannot prove the old wife's tale that the fan reduces mileage. I have documents with lots of numbers on them that support my opinion. I realize opinions are like a$$holes, everyone has one. However, my numbers prove my statement. I long ago changed my Alarmstat to 190 degrees after talking to BB and Detroit Diesel mechanics. I have seen a 7% decrease in overall temps without a decrease in mileage. I have a good radiator. My conclusion is, the Birds did not have a problem when they were built or there would have been a recall. 15-20 year old radiators need a good going over and all will be well. No scoop needed. Think of an Alarmstat as a forced high temp thermostat, because that is what it is. Leroy Eckert 1990 WB-40 Smoke N Mirrors Dahlonega, GA Royale Conversion --- On Wed, 8/6/08, Scott Forman <scottforman75@...> wrote: From: Scott Forman <scottforman75@...> Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop To: WanderlodgeForum@yahoogroups.com Date: Wednesday, August 6, 2008, 8:07 PM I do not have a cooling problem, in fact I just re-cored my radiator. Just wondering if the scoop could give me the 5 degrees I need to keep the fan from kicking on...which as we all know saps fuel economy...during hot weather. Scott --- In "WanderlodgeForum%40yahoogroups.com", "Gregory OConnor" wrote: > > Scott, when the engineered systems will no longer control the heat, > there is issue with the systems. to make things run cooler at more > stress, can only prove to allow more stress than engineered. I pust it > to the limits of heat befor I back off stress. A mod to help overcome > ambient temp influence like the radiator evaporative cooler MikeH uses > is one mod I would like to try. > > GregoryO'Connor > 94ptRomolandCa > > > > --- In "WanderlodgeForum%40yahoogroups.com", "Scott Forman" > <scottforman75@ > wrote: > > > > There was some talk a while back about fabricating an air scoop for > the > > radiator grill on a PT to increase air flow through the radiator. > Did > > anyone install one? Does it seem to make a difference? How did you > > build it? > > > > Scott Forman > > 86 PT38 > > Memphis > > >

[Scott Forman]

If the scoop pushed more air through the radiator, it could lower
operating temp to the point that the alarmastat doesn't kick in.
More air=cooler, that is the whole point of the fan. I am not
looking for lesson on how the colling system works, and if you payed
attention you would see that I just mentioned that I have a freshly
re-cored (i.e. NOT DIRTY) radiator in my bus. I am looking for
people that have anecdotal stories about scoops, not for people who
are answering every question except the one I asked.

Scott

--- In WanderlodgeForum@yahoogroups.com, Leroy Eckert
wrote:
>
> First the scoop will not cool the radiator any quicker or cooler or
reduce the fan on off sequence because the water temp is controlled
by an instrument *Alarmstat* designated by BB. It the radiator is
plugged up it ain't gonna cool, scoop, extra fans or anything else. 
On most coaches through 1994 there is an Alarmstat which senses the
water temp and activates the fan to high mode and back to idle mode
constantly if the fan override and the chassis a/c is off. It cycles
between -+ 8 degrees. It was specified by BB at 195 degrees.
Accordingly, the fan in idle mode spins between 200 and 600 rpm at
engine rpm values  800-2100 rpm according to my BB manuals. So, if
the radiator is not clean and good massive amounts of air will do not
good the result being the fan will cycle more often. In high mode,
chassis a/c on; or fan override on; the fan runs at approx. 1800 rpm.
The only thing that will stop the fan high/idle mode sequence timing
is a new radiator.
> It makes a lot of sense. Bad radiator, no air flow, no efficient
cooling. A scoop is not going to help a bad radiator. It is that
simple. Of course it may help for a bit if you remove the Alarmstat,
let the fan run constantly and you may see some reduced temps.
> I have jacked with my bus using VMSpc for quite some time and I
cannot prove the old wife's tale that the fan reduces mileage. I have
documents with lots of numbers on them that support my opinion. I
realize opinions are like a$$holes, everyone has one. However, my
numbers prove my statement. I long ago changed my Alarmstat to 190
degrees after talking to BB and Detroit Diesel mechanics. I have seen
a 7% decrease in overall temps without a decrease in mileage. I have
a good radiator.
> My conclusion is, the Birds did not have a problem when they were
built or there would have been a recall. 15-20 year old radiators
need a good going over and all will be well. No scoop needed.
> Think of an Alarmstat as a forced high temp thermostat, because
that is what it is.
>
> Leroy Eckert
> 1990 WB-40 Smoke N Mirrors
> Dahlonega, GA
> Royale Conversion
>
> --- On Wed, 8/6/08, Scott Forman <scottforman75@...> wrote:
> From: Scott Forman <scottforman75@...>
> Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop
> To: WanderlodgeForum@yahoogroups.com
> Date: Wednesday, August 6, 2008, 8:07 PM
>
>
>
>
>
>
>
>
>
>
>
> I do not have a cooling problem, in fact I just re-
cored my
>
> radiator. Just wondering if the scoop could give me the 5 degrees
I
>
> need to keep the fan from kicking on...which as we all know saps
fuel
>
> economy...during hot weather.
>
>
>
> Scott
>
>
>
> --- In WanderlodgeForum@ yahoogroups. com, "Gregory OConnor"
>
> wrote:
>
> >
>
> > Scott, when the engineered systems will no longer control the
heat,
>
> > there is issue with the systems. to make things run cooler at
more
>
> > stress, can only prove to allow more stress than engineered. I
pust
>
> it
>
> > to the limits of heat befor I back off stress. A mod to help
>
> overcome
>
> > ambient temp influence like the radiator evaporative cooler MikeH
>
> uses
>
> > is one mod I would like to try.
>
> >
>
> > GregoryO'Connor
>
> > 94ptRomolandCa
>
> >
>
> >
>
> >
>
> > --- In WanderlodgeForum@ yahoogroups. com, "Scott Forman"
>
> > <scottforman75@ > wrote:
>
> > >
>
> > > There was some talk a while back about fabricating an air scoop
>
> for
>
> > the
>
> > > radiator grill on a PT to increase air flow through the
>
> radiator.
>
> > Did
>
> > > anyone install one? Does it seem to make a difference? How
did
>
> you
>
> > > build it?
>
> > >
>
> > > Scott Forman
>
> > > 86 PT38
>
> > > Memphis
>
> > >
>
> >
>

[Leroy Eckert]

Sorry, do your own testing with a VMSpc and find out for yourself. I don't care what temp it is outside, the fan will cycle as long as you have an Alarmstat. New radiatior or not. Look at you schematics and you will see. If you don't believe it turn your fan override on for 50 miles and see what happens. Over and out. Leroy Eckert 19900WB-40 Smoke N Mirrors Dahlongga, Ga Royale Conversion --- On Wed, 8/6/08, Scott Forman <scottforman75@...> wrote: From: Scott Forman <scottforman75@...> Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop To: WanderlodgeForum@yahoogroups.com Date: Wednesday, August 6, 2008, 10:08 PM If the scoop pushed more air through the radiator, it could lower operating temp to the point that the alarmastat doesn't kick in. More air=cooler, that is the whole point of the fan. I am not looking for lesson on how the colling system works, and if you payed attention you would see that I just mentioned that I have a freshly re-cored (i.e. NOT DIRTY) radiator in my bus. I am looking for people that have anecdotal stories about scoops, not for people who are answering every question except the one I asked. Scott --- In "WanderlodgeForum%40yahoogroups.com", Leroy Eckert wrote: > > First the scoop will not cool the radiator any quicker or cooler or reduce the fan on off sequence because the water temp is controlled by an instrument *Alarmstat* designated by BB. It the radiator is plugged up it ain't gonna cool, scoop, extra fans or anything else. On most coaches through 1994 there is an Alarmstat which senses the water temp and activates the fan to high mode and back to idle mode constantly if the fan override and the chassis a/c is off. It cycles between -+ 8 degrees. It was specified by BB at 195 degrees. Accordingly, the fan in idle mode spins between 200 and 600 rpm at engine rpm values 800-2100 rpm according to my BB manuals. So, if the radiator is not clean and good massive amounts of air will do not good the result being the fan will cycle more often. In high mode, chassis a/c on; or fan override on; the fan runs at approx. 1800 rpm. The only thing that will stop the fan high/idle mode sequence timing is a new radiator. > It makes a lot of sense. Bad radiator, no air flow, no efficient cooling. A scoop is not going to help a bad radiator. It is that simple. Of course it may help for a bit if you remove the Alarmstat, let the fan run constantly and you may see some reduced temps. > I have jacked with my bus using VMSpc for quite some time and I cannot prove the old wife's tale that the fan reduces mileage. I have documents with lots of numbers on them that support my opinion. I realize opinions are like a$$holes, everyone has one. However, my numbers prove my statement. I long ago changed my Alarmstat to 190 degrees after talking to BB and Detroit Diesel mechanics. I have seen a 7% decrease in overall temps without a decrease in mileage. I have a good radiator. > My conclusion is, the Birds did not have a problem when they were built or there would have been a recall. 15-20 year old radiators need a good going over and all will be well. No scoop needed. > Think of an Alarmstat as a forced high temp thermostat, because that is what it is. > > Leroy Eckert > 1990 WB-40 Smoke N Mirrors > Dahlonega, GA > Royale Conversion > > --- On Wed, 8/6/08, Scott Forman <scottforman75@ ...> wrote: > From: Scott Forman <scottforman75@ ...> > Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop > To: "WanderlodgeForum%40yahoogroups.com" > Date: Wednesday, August 6, 2008, 8:07 PM > > > > > > > > > > > > I do not have a cooling problem, in fact I just re- cored my > > radiator. Just wondering if the scoop could give me the 5 degrees I > > need to keep the fan from kicking on...which as we all know saps fuel > > economy...during hot weather. > > > > Scott > > > > --- In WanderlodgeForum@ yahoogroups. com, "Gregory OConnor" > > wrote: > > > > > > Scott, when the engineered systems will no longer control the heat, > > > there is issue with the systems. to make things run cooler at more > > > stress, can only prove to allow more stress than engineered. I pust > > it > > > to the limits of heat befor I back off stress. A mod to help > > overcome > > > ambient temp influence like the radiator evaporative cooler MikeH > > uses > > > is one mod I would like to try. > > > > > > GregoryO'Connor > > > 94ptRomolandCa > > > > > > > > > > > > --- In WanderlodgeForum@ yahoogroups. com, "Scott Forman" > > > <scottforman75@ > wrote: > > > > > > > > There was some talk a while back about fabricating an air scoop > > for > > > the > > > > radiator grill on a PT to increase air flow through the > > radiator. > > > Did > > > > anyone install one? Does it seem to make a difference? How did > > you > > > > build it? > > > > > > > > Scott Forman > > > > 86 PT38 > > > > Memphis > > > > > > > >

[Leroy Eckert]

I am working on a design for mine based on MikeH's water flood system. It will work well but will only be needed climbing mountains in hot weather and has nothing to do with the Alarmstat control or the operation of the hydraulic fan, scoops, external electric fans, hot dogs, cold beer or anything else. Just water flood the fins on the radiator to cool her down under extreme loads while the fan is in high mode. I plan to pump the water out of the pure water holding tank if and or when needed. Leroy Eckert 1990 WB-40 Smoke N Mirrors Dahlonega, GA Royale Conversion --- On Wed, 8/6/08, Gregory OConnor wrote: From: Gregory OConnor Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop To: WanderlodgeForum@yahoogroups.com Date: Wednesday, August 6, 2008, 7:07 PM Scott, when the engineered systems will no longer control the heat, there is issue with the systems. to make things run cooler at more stress, can only prove to allow more stress than engineered. I pust it to the limits of heat befor I back off stress. A mod to help overcome ambient temp influence like the radiator evaporative cooler MikeH uses is one mod I would like to try. GregoryO'Connor 94ptRomolandCa --- In "WanderlodgeForum%40yahoogroups.com", "Scott Forman" <scottforman75@ ...> wrote: > > There was some talk a while back about fabricating an air scoop for the > radiator grill on a PT to increase air flow through the radiator. Did > anyone install one? Does it seem to make a difference? How did you > build it? > > Scott Forman > 86 PT38 > Memphis >

[Gregory OConnor]

Scott, the discussion you started is of interest to me as I have
recent issues with heat and am always looking for a lesson. I
wanted to have input but didnt want to start a thread "Stupid scoop"
or "Scoops are good for Poop" and good thing because my good friend
DickH has one in bright stainless steel that sound like it takes up
the fastlane. Dick is it hard to pay tolls? and get up to the
drivethru windows? does it help with lefthand turns?

you can always just choose what to believe to prove your
hypothesis. everyone else can learn by considering the merits of all
the input. LeroyE, thanks


GregoryO'Connor
94ptRomolandCa



--- In WanderlodgeForum@yahoogroups.com, "Scott Forman"
<scottforman75@...> wrote:
>
> If the scoop pushed more air through the radiator, it could lower
> operating temp to the point that the alarmastat doesn't kick in.
> More air=cooler, that is the whole point of the fan. I am not
> looking for lesson on how the colling system works, and if you
payed
> attention you would see that I just mentioned that I have a
freshly
> re-cored (i.e. NOT DIRTY) radiator in my bus. I am looking for
> people that have anecdotal stories about scoops, not for people
who
> are answering every question except the one I asked.
>
> Scott
>
> --- In WanderlodgeForum@yahoogroups.com, Leroy Eckert
> wrote:
> >
> > First the scoop will not cool the radiator any quicker or cooler
or
> reduce the fan on off sequence because the water temp is
controlled
> by an instrument *Alarmstat* designated by BB. It the radiator is
> plugged up it ain't gonna cool, scoop, extra fans or anything
else. 
> On most coaches through 1994 there is an Alarmstat which senses
the
> water temp and activates the fan to high mode and back to idle
mode
> constantly if the fan override and the chassis a/c is off. It
cycles
> between -+ 8 degrees. It was specified by BB at 195 degrees.
> Accordingly, the fan in idle mode spins between 200 and 600 rpm at
> engine rpm values  800-2100 rpm according to my BB manuals. So, if
> the radiator is not clean and good massive amounts of air will do
not
> good the result being the fan will cycle more often. In high mode,
> chassis a/c on; or fan override on; the fan runs at approx. 1800
rpm.
> The only thing that will stop the fan high/idle mode sequence
timing
> is a new radiator.
> > It makes a lot of sense. Bad radiator, no air flow, no
efficient
> cooling. A scoop is not going to help a bad radiator. It is that
> simple. Of course it may help for a bit if you remove the
Alarmstat,
> let the fan run constantly and you may see some reduced temps.
> > I have jacked with my bus using VMSpc for quite some time and I
> cannot prove the old wife's tale that the fan reduces mileage. I
have
> documents with lots of numbers on them that support my opinion. I
> realize opinions are like a$$holes, everyone has one. However, my
> numbers prove my statement. I long ago changed my Alarmstat to 190
> degrees after talking to BB and Detroit Diesel mechanics. I have
seen
> a 7% decrease in overall temps without a decrease in mileage. I
have
> a good radiator.
> > My conclusion is, the Birds did not have a problem when they
were
> built or there would have been a recall. 15-20 year old radiators
> need a good going over and all will be well. No scoop needed.
> > Think of an Alarmstat as a forced high temp thermostat, because
> that is what it is.
> >
> > Leroy Eckert
> > 1990 WB-40 Smoke N Mirrors
> > Dahlonega, GA
> > Royale Conversion
> >
> > --- On Wed, 8/6/08, Scott Forman <scottforman75@> wrote:
> > From: Scott Forman <scottforman75@>
> > Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop
> > To: WanderlodgeForum@yahoogroups.com
> > Date: Wednesday, August 6, 2008, 8:07 PM
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > I do not have a cooling problem, in fact I just re-
> cored my
> >
> > radiator. Just wondering if the scoop could give me the 5
degrees
> I
> >
> > need to keep the fan from kicking on...which as we all know saps
> fuel
> >
> > economy...during hot weather.
> >
> >
> >
> > Scott
> >
> >
> >
> > --- In WanderlodgeForum@ yahoogroups. com, "Gregory OConnor"
> >
> > wrote:
> >
> > >
> >
> > > Scott, when the engineered systems will no longer control the
> heat,
> >
> > > there is issue with the systems. to make things run cooler at
> more
> >
> > > stress, can only prove to allow more stress than engineered. I
> pust
> >
> > it
> >
> > > to the limits of heat befor I back off stress. A mod to help
> >
> > overcome
> >
> > > ambient temp influence like the radiator evaporative cooler
MikeH
> >
> > uses
> >
> > > is one mod I would like to try.
> >
> > >
> >
> > > GregoryO'Connor
> >
> > > 94ptRomolandCa
> >
> > >
> >
> > >
> >
> > >
> >
> > > --- In WanderlodgeForum@ yahoogroups. com, "Scott Forman"
> >
> > > <scottforman75@ > wrote:
> >
> > > >
> >
> > > > There was some talk a while back about fabricating an air
scoop
> >
> > for
> >
> > > the
> >
> > > > radiator grill on a PT to increase air flow through the
> >
> > radiator.
> >
> > > Did
> >
> > > > anyone install one? Does it seem to make a difference? How
> did
> >
> > you
> >
> > > > build it?
> >
> > > >
> >
> > > > Scott Forman
> >
> > > > 86 PT38
> >
> > > > Memphis
> >
> > > >
> >
> > >
> >
>

[Richard Hayden]

Greg,No problem getting up to the window. But, I take it out upon leaving. Yes, left turns are much easier, just let go of the wheel.

Dick Hayden - '87 PT 38 - Lake Stevens, WA

----- Original Message -----

From: "Gregoryoc@aol.com"

To: "WanderlodgeForum@yahoogroups.com"

Sent: Wednesday, August 06, 2008 9:38 PM

Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop

Scott, the discussion you started is of interest to me as I have
recent issues with heat and am always looking for a lesson. I
wanted to have input but didnt want to start a thread "Stupid scoop"
or "Scoops are good for Poop" and good thing because my good friend
DickH has one in bright stainless steel that sound like it takes up
the fastlane. Dick is it hard to pay tolls? and get up to the
drivethru windows? does it help with lefthand turns?

you can always just choose what to believe to prove your
hypothesis. everyone else can learn by considering the merits of all
the input. LeroyE, thanks

GregoryO'Connor
94ptRomolandCa

--- In "WanderlodgeForum%40yahoogroups.com", "Scott Forman"
<scottforman75@<WBR>...> wrote:
>
> If the scoop pushed more air through the radiator, it could lower
> operating temp to the point that the alarmastat doesn't kick in.
> More air=cooler, that is the whole point of the fan. I am not
> looking for lesson on how the colling system works, and if you
payed
> attention you would see that I just mentioned that I have a
freshly
> re-cored (i.e. NOT DIRTY) radiator in my bus. I am looking for
> people that have anecdotal stories about scoops, not for people
who
> are answering every question except the one I asked.
>
> Scott
>
> --- In "WanderlodgeForum%40yahoogroups.com", Leroy Eckert
> > wrote:
> >
> > First the scoop will not cool the radiator any quicker or cooler
or
> reduce the fan on off sequence because the water temp is
controlled
> by an instrument *Alarmstat* designated by BB. It the radiator is
> plugged up it ain't gonna cool, scoop, extra fans or anything
else.
> On most coaches through 1994 there is an Alarmstat which senses
the
> water temp and activates the fan to high mode and back to idle
mode
> constantly if the fan override and the chassis a/c is off. It
cycles
> between -+ 8 degrees. It was specified by BB at 195 degrees.
> Accordingly, the fan in idle mode spins between 200 and 600 rpm at
> engine rpm values 800-2100 rpm according to my BB manuals. So, if
> the radiator is not clean and good massive amounts of air will do
not
> good the result being the fan will cycle more often. In high mode,
> chassis a/c on; or fan override on; the fan runs at approx. 1800
rpm.
> The only thing that will stop the fan high/idle mode sequence
timing
> is a new radiator.
> > It makes a lot of sense. Bad radiator, no air flow, no
efficient
> cooling. A scoop is not going to help a bad radiator. It is that
> simple. Of course it may help for a bit if you remove the
Alarmstat,
> let the fan run constantly and you may see some reduced temps.
> > I have jacked with my bus using VMSpc for quite some time and I
> cannot prove the old wife's tale that the fan reduces mileage. I
have
> documents with lots of numbers on them that support my opinion. I
> realize opinions are like a$$holes, everyone has one. However, my
> numbers prove my statement. I long ago changed my Alarmstat to 190
> degrees after talking to BB and Detroit Diesel mechanics. I have
seen
> a 7% decrease in overall temps without a decrease in mileage. I
have
> a good radiator.
> > My conclusion is, the Birds did not have a problem when they
were
> built or there would have been a recall. 15-20 year old radiators
> need a good going over and all will be well. No scoop needed.
> > Think of an Alarmstat as a forced high temp thermostat, because
> that is what it is.
> >
> > Leroy Eckert
> > 1990 WB-40 Smoke N Mirrors
> > Dahlonega, GA
> > Royale Conversion
> >
> > --- On Wed, 8/6/08, Scott Forman <scottforman75@<WBR>> wrote:
> > From: Scott Forman <scottforman75@<WBR>>
> > Subject: [WanderlodgeForum] Re: PT Radiator Air Scoop
> > To: "WanderlodgeForum%40yahoogroups.com"
> > Date: Wednesday, August 6, 2008, 8:07 PM
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > I do not have a cooling problem, in fact I just re-
> cored my
> >
> > radiator. Just wondering if the scoop could give me the 5
degrees
> I
> >
> > need to keep the fan from kicking on...which as we all know saps
> fuel
> >
> > economy...during hot weather.
> >
> >
> >
> > Scott
> >
> >
> >
> > --- In WanderlodgeForum@ yahoogroups. com, "Gregory OConnor"
> >
> > wrote:
> >
> > >
> >
> > > Scott, when the engineered systems will no longer control the
> heat,
> >
> > > there is issue with the systems. to make things run cooler at
> more
> >
> > > stress, can only prove to allow more stress than engineered. I
> pust
> >
> > it
> >
> > > to the limits of heat befor I back off stress. A mod to help
> >
> > overcome
> >
> > > ambient temp influence like the radiator evaporative cooler
MikeH
> >
> > uses
> >
> > > is one mod I would like to try.
> >
> > >
> >
> > > GregoryO'Connor
> >
> > > 94ptRomolandCa
> >
> > >
> >
> > >
> >
> > >
> >
> > > --- In WanderlodgeForum@ yahoogroups. com, "Scott Forman"
> >
> > > <scottforman75@ > wrote:
> >
> > > >
> >
> > > > There was some talk a while back about fabricating an air
scoop
> >
> > for
> >
> > > the
> >
> > > > radiator grill on a PT to increase air flow through the
> >
> > radiator.
> >
> > > Did
> >
> > > > anyone install one? Does it seem to make a difference? How
> did
> >
> > you
> >
> > > > build it?
> >
> > > >
> >
> > > > Scott Forman
> >
> > > > 86 PT38
> >
> > > > Memphis
> >
> > > >
> >
> > >
> >
>