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VHS + CD

 

I am ready for production, it may take a week or so to get these out but
i'll get there. I have Pats and Louis address so they get the first ones.

I am compiling the MPEG2 clip now (takes 2-3 hours) and providing it is
under 400MB i'll include it on the disc along with the MPEG1 version. MPEG2
will work on your PC if the software is there, waaaaay better resolution
than MPEG1.

So if you want one send me your address and i'll get them in the mail as
soon as time pernits.

These are free a) because it is my token gesture for the days activities and
b) if you think the thing is a piece of video garbage I won;t be worrying
too much :-)

This offer is open to anyone on the list not just the 'Stuttgart Airforce'.

I am on my way back over to Seattle tomorrow in a vehicle (not the 928
unfortunately but I think she deserves a break) with aircon ooooooohhh
aaaaaggggggh.

Chris


Re: Bracket Drag Pics

 

what is the link for the pictures?
Calvin/90 S4


Re: Help Adam spend core $$$

 

Hi,
IMHO, I'd suggest the Dastek piggyback computer before the chips, but you
need to do something with the exhaust first before anything else will help
much.

Louie


Re: VHS + CD

 

Chris,
Here's my address: Nick Daffern
6299 152nd Ave SE
Bellevue, WA 98006-5335

Thanks for doing this,
Nick


Re: Help Adam spend core $$$

 

Adam,

yes i'll be here, what time are you comingin? i have a great use for
the $300.00. how about my collision deductible? just kidding, i would go
for the cat bypass if it was me. that big V-8 needs a little more breathing
room.


Bobby
'91 GT (big boo-boo)


Re: Hot ride home ....

 

Too many format options !!! Anyway I was going to send everyone a tape and
CD and include MPEG1 and MPEG2 formats. Let me know if you have any luck
with any conversion when you get them (probably next week).

Cheers

Chris

-----Original Message-----
From: rhenson [mailto:rhenson@...]
Sent: Wednesday, June 28, 2000 10:14 AM
To: 'PacNW928@...'
Subject: RE: [PacNW928] Hot ride home ....


Chris,

If you have a pretty decent video editing system you can make VCD's wich
will play on DVD players. But you do have to use the MPEG1 standard (which
you are right, pretty well sucks for anything other than animation). I can
record MPEG2 files to DVD with menu options, so once I get a tape from you I
will play with it. I can also turn the still images into part of the
movies/option menu.

Ray Henson
88' S4 Auto - SandMetallic/Rolls Royce




-----Original Message-----
From: Chris Ford [mailto:chris@...]
Sent: Tuesday, June 27, 2000 9:54 PM
To: PacNW928@...
Subject: RE: [PacNW928] Hot ride home ....


Well the only thing I can think of is that the 91 S4 got the GT exhaust, the
muffler I removed had dual pipes rather than the single oval. Apart from
that all is standard.

Well I just found out that I cannot produce DVD discs as I had thought (told
you this was all new) so I am of to Costco to get a bunch of tapes. Looking
at it using mpeg1 on the computer just doesn't do it justice. Have had some
fun with the editing though, editor is capable of more than I thought (apart
from producing DVD files ....)

My air con is going to get recharged tomorrow, Leif was supposed to do it
when I had my 60K service but I looked through the receipt and I couldn;t
see an item for it. If it was low 18 months ago I am surprised it lasted
this long.

How is the tube or have you been taking a break (no pun intended).

Dave Schmidt from where I used to work who lurks on the PCNW list is of to
Seattle on Friday to hopefully pick up the GT. We may be growing.

Chris


-----Original Message-----
From: Adam Birnbaum [mailto:adamb777@...]
Sent: Tuesday, June 27, 2000 7:30 AM
To: PacNW928@...
Subject: Re: [PacNW928] Hot ride home ....


Hey Chris,

Glad to hear you had a safe, although hot, ride home.

Thanks once again for allowing me to take your shark down the strip.

Once thing I've noticed about your 928, and correct me if I'm wrong, but it
has a very distinct exhaust tone. I noticed it first at the dyno day, and
confirmed it watching the films at Curt's website. I had forgotten about
it, and then noticed it again when I filmed you racing at the strip. It
sounds much more throaty from idle up to about 3K when it then sounds like
the other RMB'd 928's. Am I dreaming here? Next time you watch the drag
race videos, let me know if you hear the same. It's a great tone, I wish I
knew had to duplicate it. My RMB is on the way, so I'll have a similar
exhaust note soon, but I don't think it'll be the same. Do you have any
other exhaust mods?

By the way, in reply to your other post, I would love a CD of those drag
films when you get the chance. Take care, and I'll see at the Showdown.

-Adam

----------
From: Chris Ford <chris@...>
To: PacNW928 <PacNW928@...>
Subject: [PacNW928] Hot ride home ....
Date: Monday, June 26, 2000 1:07 PM

So it seems my aircon decided it was going AWOL yesterday on the way
home,
the rear worked fine but the output is too puny to cool the car and air
from
the front was only marginally cooler than the outside air. I guess it
needs
a recharge but what a day to go south, my daughter was in the back and OK
but we were roasting in the front, well glad to get home.

I had a great time at the strip, thanks for organizing it Adam and apart
from a little sun burn (which got worse on the way home :-( ) I seem to
be
much better for the experience !!!

So Tom how did you get home ???

As for the website which Adam mentioned in his writeup I believe Tom now
has
the (un)official PCNW website.

Hope everyone got home OK and see you all again in person in the fall.

Chris


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Re: Hot ride home ....

David Schmidt
 

I lurk until I can get the right signature here. But if the inspection
looks good and the price is right I hope to get the right sig soon!

David Schmidt
???? <- Insert future shark here.
'98 Subaru GT
'00 Ford Explorer

-----Original Message-----
From: Chris Ford
To: PacNW928@...
Sent: 6/27/00 9:53 PM
Subject: RE: [PacNW928] Hot ride home ....

[...]

Dave Schmidt from where I used to work who lurks on the PCNW list is off
to
Seattle on Friday to hopefully pick up the GT. We may be growing.

Chris


Thanks Rob, but,

 

I had the water pump done with the timing belt as soon as I got it, which was like 6 months ago... could it have gone out?

ugggh! I hope not!

thanks!


your pal

andy


Re: Heat shield

Adam Birnbaum
 

Louie wrote:

Hi Adam,
I'm still pondering what to do. What you suggest would work. Also a
couple of
flush NACA ducts at the rear of the hood on each side of the air box
would
work and not change the appearance much.
I'm wondering about the pressure dynamics of a rear hood inlet. It's my
understanding that a cowl induction hood gets air from the high pressure
front that forms at the windshield. Propping the back of the hood like I'm
proposing raises some questions (that I'm sure would require testing):

1) How high would the rear of the hood have to be propped. A cowl
induction scoop raises about two inches off the hood, is this enough to get
out of the boundary layer?

2) Would propping the rear of the hood have any affect on ground adhesion?
It's seems that it would release a lot of under hood pressure (if there is
any), as well as increase the face area of the hood into the oncoming air.
This would seem to be beneficial.

3) Would NACA ducts mounted at the rear be efficient? It seems that they
would be almost horizontal at that point. I always kind of pictured the
ducts to rely on the ram effect of incoming air.


I hate to cut anything though. I
better get an old "test" hood from somewhere. Anyone make a fiberglass
replacement?
I don't know of any 'glass hoods, but I think I may have a line on a
slightly crunched GT hood. It's Barney Purple, ( Hi Bobby! :0 ) but might
be a nice fashion statement for the Great White Hope (your GT).

-Adam "Does head and shoulders work on aluminum shavings?" Birnbaum










Louie

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Re: Hot ride home ....

rhenson
 

Chris,

If you have a pretty decent video editing system you can make VCD's wich
will play on DVD players. But you do have to use the MPEG1 standard (which
you are right, pretty well sucks for anything other than animation). I can
record MPEG2 files to DVD with menu options, so once I get a tape from you I
will play with it. I can also turn the still images into part of the
movies/option menu.

Ray Henson
88' S4 Auto - SandMetallic/Rolls Royce

-----Original Message-----
From: Chris Ford [mailto:chris@...]
Sent: Tuesday, June 27, 2000 9:54 PM
To: PacNW928@...
Subject: RE: [PacNW928] Hot ride home ....


Well the only thing I can think of is that the 91 S4 got the GT exhaust, the
muffler I removed had dual pipes rather than the single oval. Apart from
that all is standard.

Well I just found out that I cannot produce DVD discs as I had thought (told
you this was all new) so I am of to Costco to get a bunch of tapes. Looking
at it using mpeg1 on the computer just doesn't do it justice. Have had some
fun with the editing though, editor is capable of more than I thought (apart
from producing DVD files ....)

My air con is going to get recharged tomorrow, Leif was supposed to do it
when I had my 60K service but I looked through the receipt and I couldn;t
see an item for it. If it was low 18 months ago I am surprised it lasted
this long.

How is the tube or have you been taking a break (no pun intended).

Dave Schmidt from where I used to work who lurks on the PCNW list is of to
Seattle on Friday to hopefully pick up the GT. We may be growing.

Chris


-----Original Message-----
From: Adam Birnbaum [mailto:adamb777@...]
Sent: Tuesday, June 27, 2000 7:30 AM
To: PacNW928@...
Subject: Re: [PacNW928] Hot ride home ....


Hey Chris,

Glad to hear you had a safe, although hot, ride home.

Thanks once again for allowing me to take your shark down the strip.

Once thing I've noticed about your 928, and correct me if I'm wrong, but it
has a very distinct exhaust tone. I noticed it first at the dyno day, and
confirmed it watching the films at Curt's website. I had forgotten about
it, and then noticed it again when I filmed you racing at the strip. It
sounds much more throaty from idle up to about 3K when it then sounds like
the other RMB'd 928's. Am I dreaming here? Next time you watch the drag
race videos, let me know if you hear the same. It's a great tone, I wish I
knew had to duplicate it. My RMB is on the way, so I'll have a similar
exhaust note soon, but I don't think it'll be the same. Do you have any
other exhaust mods?

By the way, in reply to your other post, I would love a CD of those drag
films when you get the chance. Take care, and I'll see at the Showdown.

-Adam

----------
From: Chris Ford <chris@...>
To: PacNW928 <PacNW928@...>
Subject: [PacNW928] Hot ride home ....
Date: Monday, June 26, 2000 1:07 PM

So it seems my aircon decided it was going AWOL yesterday on the way
home,
the rear worked fine but the output is too puny to cool the car and air
from
the front was only marginally cooler than the outside air. I guess it
needs
a recharge but what a day to go south, my daughter was in the back and OK
but we were roasting in the front, well glad to get home.

I had a great time at the strip, thanks for organizing it Adam and apart
from a little sun burn (which got worse on the way home :-( ) I seem to
be
much better for the experience !!!

So Tom how did you get home ???

As for the website which Adam mentioned in his writeup I believe Tom now
has
the (un)official PCNW website.

Hope everyone got home OK and see you all again in person in the fall.

Chris


------------------------------------------------------------------------
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TT Update, if anyone's interested :)

Adam Birnbaum
 

Well I got the front of the tube mounted last night.

Mark at 928 Int'l confirmed that the front flange was the same on the 5
speed as on the A/T. Needless to say, that was not the news I wanted to
hear.

It was ugly, but desperate times call for desperate measures. All I will
say is that the install required 1) a third floor jack (nice portable with
a carrying case so I can bring it to DE's) 2) two jack handles to use as
pry bars, and yes 3) borrowed dremel tool.

Don't ask, I don't want to talk about it. Were there shavings? Oh yes. The
front is in.

I'm going to review the manuals tonight for the procedure to remove the
converter housing and replacing the bearings and converter seal. I've
never been an A/T kind of guy until I got my shark, and I've heard bad
voodoo things about pulling out converters, but I still want to go for it.

For those of you that inquired, thanks for the support.


-Adam


Re: Hot ride home ....

Curt Nichols
 

Hi, Chris.

> Well I just found out that I cannot produce DVD discs as I had thought
> (told you this was all new) so I am of to Costco to get a bunch of tapes.

Please put me on the list for a tape! (And let me know the cost.) Having
heard reports of the shark drags I'm all the more disappointed that I couldn't
be there Sunday. You guys rock and our cars kick butt! On the other hand, it
was a gorgeous day at Mt. Rainier and Mom didn't even close her eyes on the
drive there. I'll just order Mark A's enduro tape in the meantime.

Moved, back at work, and on email of sorts...

Curt

--- Chris Ford <chris@...> wrote:
Well the only thing I can think of is that the 91 S4 got the GT exhaust, the
muffler I removed had dual pipes rather than the single oval. Apart from
that all is standard.

Well I just found out that I cannot produce DVD discs as I had thought (told
you this was all new) so I am of to Costco to get a bunch of tapes. Looking
at it using mpeg1 on the computer just doesn't do it justice. Have had some
fun with the editing though, editor is capable of more than I thought (apart
from producing DVD files ....)

My air con is going to get recharged tomorrow, Leif was supposed to do it
when I had my 60K service but I looked through the receipt and I couldn;t
see an item for it. If it was low 18 months ago I am surprised it lasted
this long.

How is the tube or have you been taking a break (no pun intended).

Dave Schmidt from where I used to work who lurks on the PCNW list is of to
Seattle on Friday to hopefully pick up the GT. We may be growing.

Chris


-----Original Message-----
From: Adam Birnbaum [mailto:adamb777@...]
Sent: Tuesday, June 27, 2000 7:30 AM
To: PacNW928@...
Subject: Re: [PacNW928] Hot ride home ....


Hey Chris,

Glad to hear you had a safe, although hot, ride home.

Thanks once again for allowing me to take your shark down the strip.

Once thing I've noticed about your 928, and correct me if I'm wrong, but it
has a very distinct exhaust tone. I noticed it first at the dyno day, and
confirmed it watching the films at Curt's website. I had forgotten about
it, and then noticed it again when I filmed you racing at the strip. It
sounds much more throaty from idle up to about 3K when it then sounds like
the other RMB'd 928's. Am I dreaming here? Next time you watch the drag
race videos, let me know if you hear the same. It's a great tone, I wish I
knew had to duplicate it. My RMB is on the way, so I'll have a similar
exhaust note soon, but I don't think it'll be the same. Do you have any
other exhaust mods?

By the way, in reply to your other post, I would love a CD of those drag
films when you get the chance. Take care, and I'll see at the Showdown.

-Adam

----------
From: Chris Ford <chris@...>
To: PacNW928 <PacNW928@...>
Subject: [PacNW928] Hot ride home ....
Date: Monday, June 26, 2000 1:07 PM

So it seems my aircon decided it was going AWOL yesterday on the way
home,
the rear worked fine but the output is too puny to cool the car and air
from
the front was only marginally cooler than the outside air. I guess it
needs
a recharge but what a day to go south, my daughter was in the back and OK
but we were roasting in the front, well glad to get home.

I had a great time at the strip, thanks for organizing it Adam and apart
from a little sun burn (which got worse on the way home :-( ) I seem to
be
much better for the experience !!!

So Tom how did you get home ???

As for the website which Adam mentioned in his writeup I believe Tom now
has
the (un)official PCNW website.

Hope everyone got home OK and see you all again in person in the fall.

Chris


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Re: Hot ride home ....

 

Well the only thing I can think of is that the 91 S4 got the GT exhaust, the
muffler I removed had dual pipes rather than the single oval. Apart from
that all is standard.

Well I just found out that I cannot produce DVD discs as I had thought (told
you this was all new) so I am of to Costco to get a bunch of tapes. Looking
at it using mpeg1 on the computer just doesn't do it justice. Have had some
fun with the editing though, editor is capable of more than I thought (apart
from producing DVD files ....)

My air con is going to get recharged tomorrow, Leif was supposed to do it
when I had my 60K service but I looked through the receipt and I couldn;t
see an item for it. If it was low 18 months ago I am surprised it lasted
this long.

How is the tube or have you been taking a break (no pun intended).

Dave Schmidt from where I used to work who lurks on the PCNW list is of to
Seattle on Friday to hopefully pick up the GT. We may be growing.

Chris

-----Original Message-----
From: Adam Birnbaum [mailto:adamb777@...]
Sent: Tuesday, June 27, 2000 7:30 AM
To: PacNW928@...
Subject: Re: [PacNW928] Hot ride home ....


Hey Chris,

Glad to hear you had a safe, although hot, ride home.

Thanks once again for allowing me to take your shark down the strip.

Once thing I've noticed about your 928, and correct me if I'm wrong, but it
has a very distinct exhaust tone. I noticed it first at the dyno day, and
confirmed it watching the films at Curt's website. I had forgotten about
it, and then noticed it again when I filmed you racing at the strip. It
sounds much more throaty from idle up to about 3K when it then sounds like
the other RMB'd 928's. Am I dreaming here? Next time you watch the drag
race videos, let me know if you hear the same. It's a great tone, I wish I
knew had to duplicate it. My RMB is on the way, so I'll have a similar
exhaust note soon, but I don't think it'll be the same. Do you have any
other exhaust mods?

By the way, in reply to your other post, I would love a CD of those drag
films when you get the chance. Take care, and I'll see at the Showdown.

-Adam

----------
From: Chris Ford <chris@...>
To: PacNW928 <PacNW928@...>
Subject: [PacNW928] Hot ride home ....
Date: Monday, June 26, 2000 1:07 PM

So it seems my aircon decided it was going AWOL yesterday on the way
home,
the rear worked fine but the output is too puny to cool the car and air
from
the front was only marginally cooler than the outside air. I guess it
needs
a recharge but what a day to go south, my daughter was in the back and OK
but we were roasting in the front, well glad to get home.

I had a great time at the strip, thanks for organizing it Adam and apart
from a little sun burn (which got worse on the way home :-( ) I seem to
be
much better for the experience !!!

So Tom how did you get home ???

As for the website which Adam mentioned in his writeup I believe Tom now
has
the (un)official PCNW website.

Hope everyone got home OK and see you all again in person in the fall.

Chris


------------------------------------------------------------------------
Savings + service + convenience = beMANY!

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Re: Heat shield

 

In a message dated 6/27/00 5:16:18 PM Pacific Daylight Time,
adamb777@... writes:

Thanks much for the info. I guess this raises the simple question of why
not use the cowl induction method? It would seem machining some tall shims
on the rear mounts of the hood and modifying the air box cover is all that
it would take. I don't think having an expanding hood seam would be too
unsightly on the 928.

If this isn't a direction you'd be interested in pursuing, let me know and
when I get my shark back together I'll go for it. It definitely poses an
interesting question.
Hi Adam,
I'm still pondering what to do. What you suggest would work. Also a couple of
flush NACA ducts at the rear of the hood on each side of the air box would
work and not change the appearance much. I hate to cut anything though. I
better get an old "test" hood from somewhere. Anyone make a fiberglass
replacement?
Louie


Re: Heat shield

 

In a message dated 6/27/00 1:10:37 PM Pacific Daylight Time,
midlman@... writes:

I was hopeful that your shield would work :-( . I know my car gets
way too hot under the hood, can't even touch the strut bar after a
run on a hot day. I always figured it was my black hood contributing
to the heat, but after your results maybe not. Given that your car
is white it would be less affected by the sun. Maybe if you check
the temps on a black (or darker color) they will be even hotter?


I suppose the only way to get around it is to construct those ducts
in
the hood ( or the Devek route--cowl induction ).

Anyway, thanks for the info and keep up the good work.
Hi Tom,
I bet a black car would be even worse. That's why I did the test after
sundown so the sun wouldn't be a factor.

Get out the sawzall and whack out a big hole in the back of the hood for a
scoop.

Louie


Re: Heat shield

Adam Birnbaum
 

Hey Louie,

Thanks much for the info. I guess this raises the simple question of why
not use the cowl induction method? It would seem machining some tall shims
on the rear mounts of the hood and modifying the air box cover is all that
it would take. I don't think having an expanding hood seam would be too
unsightly on the 928.

If this isn't a direction you'd be interested in pursuing, let me know and
when I get my shark back together I'll go for it. It definitely poses an
interesting question.


-Adam



----------
From: LouisOtt@...
To: PacNW928@...
Subject: [PacNW928] Heat shield
Date: Tuesday, June 27, 2000 9:21 AM

Hi,
At the drags Sunday, some of you noticed that I had a heat shield on top
of
the radiator core to attempt to keep heated air out of the intake ducts.
Last
evening I did some temp tests with an accurate, digital, multi-channel
temp
gauge to see what was really going on with the intake air temps and to
see if
the shield helped.

I found out some interesting stuff. First the heat shield doesn't help at
all. Second the air intake system is bad for keeping the intake air cool.
I
measured ambient air temp, the temp about 2" inside the front of the air
duct, and also in the air box on top of the air cleaner element. The temp
sensors were all in free air, not touching anything. I had the air intake
louvers open (louver motor power plug disconnected) for the test. At
speeds
above 20 mph the air temp at the inlet was 2 degrees F warmer than
ambient
both with and without the heat shield. The air picked up another 8 to 10
degrees between the inlet and the air box. With the louvers operating
normally (louver motor power plug connected) add 10 degrees to each
reading.
I tested at speeds between 20 and 65 mph with results within a degree or
2
regardless of speed. Below 20 the air inlet temp gets progressively
hotter so
that idling for 5 minutes will have both the inlet air temp and the air
box
temp at 130 degrees F. From a 5 minute idle, a fast acceleration to 100
mph
(lots of air going in) only lowered the air box temps down to about 118 F
and
after continuing at 70 - 80 for about a mile brought it down to 105 F.
The
hot air heat soaking the air box at idle is coming from the hot radiator.
After running with the air temps stable, and stopping to idle, I could
see
the air inlet temp rise within a minute or so to 130 with the air box
temp
lagging. Another 2 or 3 minutes had the air box temp equal to the inlet
temp.
Start driving at 35 mph or so and the air inlet temp drops soon, but the
air
box temp remains high for several minutes.

The ambient temp was between 77 and 75 after sunset so no influence of
sun
hitting the hood or in shade.

Insulated air duct tubes like GTS have would probably help some at speed,
but
the rapid heat soaking at idle comes from the air intake being in close
proximity to the radiator.

Just thought I'd throw this out to y'all to confirm once again that these
cars weren't made for hot climates, and if you have intake louvers, keep
them
locked open in the summer.

Louie Ott
'90GT



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Re: Why I helped and saw no one. :(

 

Hi Andy,

I dont want to frighten you or simply state the obvious, but it could very
well be your water pump. Mine was doing the same thing last summer. One day
it was fine, the next day it was over heating. The interesting thing is about
three days later is when it finally started making the typical noises
associated with a bad pump. I hope it is something much simpler than that.

Take care
Rob Fossett


Re: Heat shield

 

Hi Louie,

I was hopeful that your shield would work :-( . I know my car gets
way too hot under the hood, can't even touch the strut bar after a
run on a hot day. I always figured it was my black hood contributing
to the heat, but after your results maybe not. Given that your car
is white it would be less affected by the sun. Maybe if you check
the temps on a black (or darker color) they will be even hotter?


I suppose the only way to get around it is to construct those ducts
in
the hood ( or the Devek route--cowl induction ).

Anyway, thanks for the info and keep up the good work.


Later,
Tom

P.S. Pats pics are up on the web site, check them out.

In the bracket drags section.


Re: Hot ride home ....

Adam Birnbaum
 

Hey Chris,

Glad to hear you had a safe, although hot, ride home.

Thanks once again for allowing me to take your shark down the strip.

Once thing I've noticed about your 928, and correct me if I'm wrong, but it
has a very distinct exhaust tone. I noticed it first at the dyno day, and
confirmed it watching the films at Curt's website. I had forgotten about
it, and then noticed it again when I filmed you racing at the strip. It
sounds much more throaty from idle up to about 3K when it then sounds like
the other RMB'd 928's. Am I dreaming here? Next time you watch the drag
race videos, let me know if you hear the same. It's a great tone, I wish I
knew had to duplicate it. My RMB is on the way, so I'll have a similar
exhaust note soon, but I don't think it'll be the same. Do you have any
other exhaust mods?

By the way, in reply to your other post, I would love a CD of those drag
films when you get the chance. Take care, and I'll see at the Showdown.

-Adam

----------
From: Chris Ford <chris@...>
To: PacNW928 <PacNW928@...>
Subject: [PacNW928] Hot ride home ....
Date: Monday, June 26, 2000 1:07 PM

So it seems my aircon decided it was going AWOL yesterday on the way
home,
the rear worked fine but the output is too puny to cool the car and air
from
the front was only marginally cooler than the outside air. I guess it
needs
a recharge but what a day to go south, my daughter was in the back and OK
but we were roasting in the front, well glad to get home.

I had a great time at the strip, thanks for organizing it Adam and apart
from a little sun burn (which got worse on the way home :-( ) I seem to
be
much better for the experience !!!

So Tom how did you get home ???

As for the website which Adam mentioned in his writeup I believe Tom now
has
the (un)official PCNW website.

Hope everyone got home OK and see you all again in person in the fall.

Chris


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Heat shield

 

Hi,
At the drags Sunday, some of you noticed that I had a heat shield on top of
the radiator core to attempt to keep heated air out of the intake ducts. Last
evening I did some temp tests with an accurate, digital, multi-channel temp
gauge to see what was really going on with the intake air temps and to see if
the shield helped.

I found out some interesting stuff. First the heat shield doesn't help at
all. Second the air intake system is bad for keeping the intake air cool. I
measured ambient air temp, the temp about 2" inside the front of the air
duct, and also in the air box on top of the air cleaner element. The temp
sensors were all in free air, not touching anything. I had the air intake
louvers open (louver motor power plug disconnected) for the test. At speeds
above 20 mph the air temp at the inlet was 2 degrees F warmer than ambient
both with and without the heat shield. The air picked up another 8 to 10
degrees between the inlet and the air box. With the louvers operating
normally (louver motor power plug connected) add 10 degrees to each reading.
I tested at speeds between 20 and 65 mph with results within a degree or 2
regardless of speed. Below 20 the air inlet temp gets progressively hotter so
that idling for 5 minutes will have both the inlet air temp and the air box
temp at 130 degrees F. From a 5 minute idle, a fast acceleration to 100 mph
(lots of air going in) only lowered the air box temps down to about 118 F and
after continuing at 70 - 80 for about a mile brought it down to 105 F. The
hot air heat soaking the air box at idle is coming from the hot radiator.
After running with the air temps stable, and stopping to idle, I could see
the air inlet temp rise within a minute or so to 130 with the air box temp
lagging. Another 2 or 3 minutes had the air box temp equal to the inlet temp.
Start driving at 35 mph or so and the air inlet temp drops soon, but the air
box temp remains high for several minutes.

The ambient temp was between 77 and 75 after sunset so no influence of sun
hitting the hood or in shade.

Insulated air duct tubes like GTS have would probably help some at speed, but
the rapid heat soaking at idle comes from the air intake being in close
proximity to the radiator.

Just thought I'd throw this out to y'all to confirm once again that these
cars weren't made for hot climates, and if you have intake louvers, keep them
locked open in the summer.

Louie Ott
'90GT