[DeTomaso] Gr4 Pantera at Le Mans video
michael frazier
red3644 at hotmail.com
Mon Feb 1 12:22:47 EST 2021
Hi Jack,
I think you’re right. The hood was stock and not vented.
Michael
Sent from my iPhone
On Jan 31, 2021, at 4:51 PM, jderyke at aol.com wrote:
I suspect any small speed increase will be due to smoothed airflow over the top of an unlatched hood and over the roof, not so much from increased airflow thru the grille & radiator, then somehow over the weatherstripped front trunk bulkhead and out the rear of the hood. It may be the reverse with vented Sunbeam Tiger LA front hoods.
Remember those early comments on windshield wiper lift over 140 mph with stock Panteras, and the Gr-3 (& Hall Pantera) anti-lift wiper accessories to prevent this? That same lift-from-air-flow seems to be pulling up on the front hood. Michael, who made your current front hood? Does it have vents?
Curious- J DeRyke
-----Original Message-----
From: michael frazier <red3644 at hotmail.com>
To: Jeff Detrich <jjdetrich at gmail.com>; Mike Drew <mikeldrew at aol.com>
Cc: De Tomaso Forum <detomaso at server.detomasolist.com>
Sent: Sun, Jan 31, 2021 1:48 pm
Subject: Re: [DeTomaso] Gr4 Pantera at Le Mans video
While at the Big Bend Open Road Race I've run with the front hood
latched and unlatched at speeds between
120 and 150mph. Photos show an obvious bow in the hood while latched.
While unlatched, it rose about 2 inches
at speed. The car in the video had a much larger blade type air dam
than mine and I'm sure it put much more air thru the
radiator and under the hood. I'm not sure what speeds he was running,
but I don't think most of it was much higher.
The rear hood also rises smoothly and balances between pressure zones,
probably reducing turbulence inside and
outside the rear of the car.
Jeff, both headlights were up. 😊
Michael
Sent from [1]Mail for Windows 10
From: [2]Jeff Detrich
Sent: Saturday, January 30, 2021 11:38 AM
To: [3]Mike Drew
Cc: [4]De Tomaso Forum
Subject: Re: [DeTomaso] Gr4 Pantera at Le Mans video
OOO-WEE.
just curious, is that the right side headlight bucket sticking up?
Jeff
6559
On Sat, Jan 30, 2021 at 1:23 AM Mike Drew via DeTomaso <
detomaso at server.detomasolist.com<mailto:detomaso at server.detomasolist.com>> wrote:
> Guys,
>
> From Le Mans Classic in 2018, a great video of the ex-Herbert
Muller
> factory Gr4 Pantera. The team forgot to secure the front hood and
it
> floats at speed, which is actually aerodynamically beneficial!
>
> Great sound, great video....
>
> [1]https://youtu.be/OdKqD_NfXFY
>
> Mike
>
> Sent from my iPad
>
> References
>
> 1. [5]https://youtu.be/OdKqD_NfXFY
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5. https://youtu.be/OdKqD_NfXFY
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-------------- next part --------------
Hi Jack,
I think you're right. The hood was stock and not vented.
Michael
Sent from my iPhone
On Jan 31, 2021, at 4:51 PM, jderyke at aol.com wrote:
I suspect any small speed increase will be due to smoothed airflow over
the top of an unlatched hood and over the roof, not so much from
increased airflow thru the grille & radiator, then somehow over the
weatherstripped front trunk bulkhead and out the rear of the hood. It
may be the reverse with vented Sunbeam Tiger LA front hoods.
Remember those early comments on windshield wiper lift over 140 mph
with stock Panteras, and the Gr-3 (& Hall Pantera) anti-lift wiper
accessories to prevent this? That same lift-from-air-flow seems to be
pulling up on the front hood. Michael, who made your current front
hood? Does it have vents?
Curious- J DeRyke
-----Original Message-----
From: michael frazier <red3644 at hotmail.com>
To: Jeff Detrich <jjdetrich at gmail.com>; Mike Drew <mikeldrew at aol.com>
Cc: De Tomaso Forum <detomaso at server.detomasolist.com>
Sent: Sun, Jan 31, 2021 1:48 pm
Subject: Re: [DeTomaso] Gr4 Pantera at Le Mans video
While at the Big Bend Open Road Race I've run with the front hood
latched and unlatched at speeds between
120 and 150mph. Photos show an obvious bow in the hood while
latched.
While unlatched, it rose about 2 inches
at speed. The car in the video had a much larger blade type air dam
than mine and I'm sure it put much more air thru the
radiator and under the hood. I'm not sure what speeds he was
running,
but I don't think most of it was much higher.
The rear hood also rises smoothly and balances between pressure
zones,
probably reducing turbulence inside and
outside the rear of the car.
Jeff, both headlights were up.
Michael
Sent from [1]Mail for Windows 10
From: [2]Jeff Detrich
Sent: Saturday, January 30, 2021 11:38 AM
To: [3]Mike Drew
Cc: [4]De Tomaso Forum
Subject: Re: [DeTomaso] Gr4 Pantera at Le Mans video
OOO-WEE.
just curious, is that the right side headlight bucket sticking up?
Jeff
6559
On Sat, Jan 30, 2021 at 1:23 AM Mike Drew via DeTomaso <
[1]detomaso at server.detomasolist.com> wrote:
> Guys,
>
> From Le Mans Classic in 2018, a great video of the ex-Herbert
Muller
> factory Gr4 Pantera. The team forgot to secure the front hood
and
it
> floats at speed, which is actually aerodynamically beneficial!
>
> Great sound, great video....
>
> [1][2]https://youtu.be/OdKqD_NfXFY
>
> Mike
>
> Sent from my iPad
>
> References
>
> 1. [5][3]https://youtu.be/OdKqD_NfXFY
> _______________________________________________
>
>
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
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> [6][5]http://server.detomasolist.com/mailman/listinfo/detomaso
>
> To manage your subscription (change email address, unsubscribe,
etc.)
use
> the links above.
>
> Members who post to this list grant license to the list to forward
any
> message posted here to all past, current, or future members of the
list.
> They also grant the list owner permission to maintain an archive or
approve
> the archiving of list messages.
References
1. [6]https://go.microsoft.com/fwlink/?LinkId=550986
2. mailto:[7]jjdetrich at gmail.com
3. mailto:[8]mikeldrew at aol.com
4. mailto:[9]detomaso at server.detomasolist.com
5. [10]https://youtu.be/OdKqD_NfXFY
6. [11]http://server.detomasolist.com/mailman/listinfo/detomaso
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References
1. mailto:detomaso at server.detomasolist.com
2. https://youtu.be/OdKqD_NfXFY
3. https://youtu.be/OdKqD_NfXFY
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6. https://go.microsoft.com/fwlink/?LinkId=550986
7. mailto:jjdetrich at gmail.com
8. mailto:mikeldrew at aol.com
9. mailto:detomaso at server.detomasolist.com
10. https://youtu.be/OdKqD_NfXFY
11. http://server.detomasolist.com/mailman/listinfo/detomaso
12. mailto:DeTomaso at server.detomasolist.com
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