Home » Public Forums » GMCnet » Is 142 MPH possible?
| Re: [GMCnet] Is 142 MPH possible? [message #360548 is a reply to message #360545] |
Sat, 05 December 2020 16:01   |
johnd01
Messages: 354
Registered: July 2017
Location: Sacrameot
Karma: -1
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Senior Member |
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What is the top speed for a stock GMC 455 with the stock gearing?
On Sat, Dec 5, 2020 at 1:39 PM James Hupy via Gmclist <
gmclist@list.gmcnet.org> wrote:
> A few years ago, I was in B.C. Canada visiting some of my Canadian GMC
> friends, and we attended a car show at Abbotsford, B.C. You might imagine
> my surprise over walking into the competition car section and almost
> falling over when I encountered a slingshot dragster that I used to pilot
> when it was owned by a car club in Oregon. I always kinda wondered what
> ever became of it. The current owner bought it at a auction, and didn't
> have any history of the car. I filled him in on some of it while I was
> driving it. It was in eventually the same condition as it was when I drove
> it. A blast from the past, for sure. It had an injected DeSoto Hemi for
> power, Ran in the high 140's - low 150's Can't remember the E.T.'s, but it
> was competitive for the time.
> I would guesstimate that for a GMC to run in the 140 mph speed, that
> it would have to sustain 1400 - 1500 horsepower through the measured mile
> at Bonneville. A tall task for an Oldsmobile in my opinion.
> Jim Hupy
> Salem, Oregon
>
> On Sat, Dec 5, 2020, 12:56 PM Larry Nelson via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Jim, when I used the term "slingshot" to my son in law, he looked at me
>> like I had two heads. We were watching NHRA on the tube. I had to
> explain.
>> --
>> Larry Nelson Springfield, MO
>> Ex GMC'er, then GM Busnut
>> now '77 Eleganza ARS WB0JOT
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
*John Phillips*
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Johnd01
John Phillips
Avion A2600 TZE064V101164
Rancho Cordova, CA (Sacramento)
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| Re: [GMCnet] Is 142 MPH possible? [message #360549 is a reply to message #360517] |
Sat, 05 December 2020 16:06 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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This is going to get interesting.
I’ve done 90 in mine. I was not going after anything at that speed. I didn’t have cruise, it was flat pavement and a windless beautiful day, and then I noticed the speedometer was buried. I looked at the GPS before lifting, and it was reporting 90.
There seemed to be a bit more in there, but I was not about to try it then.
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Manny Transmission
“The Aluminum and Fiberglass Mistress”
|[ ]~~~[][ ][] \
"--OO--[]---O-"
> On Dec 5, 2020, at 5:01 PM, John Phillips via Gmclist wrote:
>
> What is the top speed for a stock GMC 455 with the stock gearing?
>
> On Sat, Dec 5, 2020 at 1:39 PM James Hupy via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> A few years ago, I was in B.C. Canada visiting some of my Canadian GMC
>> friends, and we attended a car show at Abbotsford, B.C. You might imagine
>> my surprise over walking into the competition car section and almost
>> falling over when I encountered a slingshot dragster that I used to pilot
>> when it was owned by a car club in Oregon. I always kinda wondered what
>> ever became of it. The current owner bought it at a auction, and didn't
>> have any history of the car. I filled him in on some of it while I was
>> driving it. It was in eventually the same condition as it was when I drove
>> it. A blast from the past, for sure. It had an injected DeSoto Hemi for
>> power, Ran in the high 140's - low 150's Can't remember the E.T.'s, but it
>> was competitive for the time.
>> I would guesstimate that for a GMC to run in the 140 mph speed, that
>> it would have to sustain 1400 - 1500 horsepower through the measured mile
>> at Bonneville. A tall task for an Oldsmobile in my opinion.
>> Jim Hupy
>> Salem, Oregon
>>
>> On Sat, Dec 5, 2020, 12:56 PM Larry Nelson via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>>> Jim, when I used the term "slingshot" to my son in law, he looked at me
>>> like I had two heads. We were watching NHRA on the tube. I had to
>> explain.
>>> --
>>> Larry Nelson Springfield, MO
>>> Ex GMC'er, then GM Busnut
>>> now '77 Eleganza ARS WB0JOT
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
>
> *John Phillips*
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Is 142 MPH possible? [message #360550 is a reply to message #360517] |
Sat, 05 December 2020 16:22 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I have buried the speedometer on numerous occasions. Mine has a 90 mph
clock. Never checked that to be precisely correct. Next time I try, I will
check it with a GPS. It still had some left in it.
Jim Hupy
Salem, Oregon
On Sat, Dec 5, 2020 at 2:06 PM Dolph Santorine via Gmclist <
gmclist@list.gmcnet.org> wrote:
> This is going to get interesting.
>
> I’ve done 90 in mine. I was not going after anything at that speed. I
> didn’t have cruise, it was flat pavement and a windless beautiful day, and
> then I noticed the speedometer was buried. I looked at the GPS before
> lifting, and it was reporting 90.
>
> There seemed to be a bit more in there, but I was not about to try it then.
>
> Dolph
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> Howell EFI & EBL, Reaction Arms, Manny Transmission
>
> “The Aluminum and Fiberglass Mistress”
>
> |[ ]~~~[][ ][] \
> "--OO--[]---O-"
>
>> On Dec 5, 2020, at 5:01 PM, John Phillips via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> What is the top speed for a stock GMC 455 with the stock gearing?
>>
>> On Sat, Dec 5, 2020 at 1:39 PM James Hupy via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>>> A few years ago, I was in B.C. Canada visiting some of my Canadian GMC
>>> friends, and we attended a car show at Abbotsford, B.C. You might
> imagine
>>> my surprise over walking into the competition car section and almost
>>> falling over when I encountered a slingshot dragster that I used to
> pilot
>>> when it was owned by a car club in Oregon. I always kinda wondered what
>>> ever became of it. The current owner bought it at a auction, and didn't
>>> have any history of the car. I filled him in on some of it while I was
>>> driving it. It was in eventually the same condition as it was when I
> drove
>>> it. A blast from the past, for sure. It had an injected DeSoto Hemi for
>>> power, Ran in the high 140's - low 150's Can't remember the E.T.'s, but
> it
>>> was competitive for the time.
>>> I would guesstimate that for a GMC to run in the 140 mph speed, that
>>> it would have to sustain 1400 - 1500 horsepower through the measured
> mile
>>> at Bonneville. A tall task for an Oldsmobile in my opinion.
>>> Jim Hupy
>>> Salem, Oregon
>>>
>>> On Sat, Dec 5, 2020, 12:56 PM Larry Nelson via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>>> Jim, when I used the term "slingshot" to my son in law, he looked at me
>>>> like I had two heads. We were watching NHRA on the tube. I had to
>>> explain.
>>>> --
>>>> Larry Nelson Springfield, MO
>>>> Ex GMC'er, then GM Busnut
>>>> now '77 Eleganza ARS WB0JOT
>>>>
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>>
>> *John Phillips*
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Is 142 MPH possible? [message #360554 is a reply to message #360517] |
Sat, 05 December 2020 18:46 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Nope, mine will not accelerate that quickly, except maybe downhill. A steep
downhill at that.
Jim Hupy
Salem, Oregon
On Sat, Dec 5, 2020, 4:37 PM Jim Kanomata via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Like any of you to get to 100mph in one mile.
> Yes, My Royal with 540 Twin Turbo can go 100 in one mile.
>
> On Sat, Dec 5, 2020 at 2:23 PM James Hupy via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> I have buried the speedometer on numerous occasions. Mine has a 90 mph
>> clock. Never checked that to be precisely correct. Next time I try, I
> will
>> check it with a GPS. It still had some left in it.
>> Jim Hupy
>> Salem, Oregon
>>
>> On Sat, Dec 5, 2020 at 2:06 PM Dolph Santorine via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>>> This is going to get interesting.
>>>
>>> I’ve done 90 in mine. I was not going after anything at that speed. I
>>> didn’t have cruise, it was flat pavement and a windless beautiful day,
>> and
>>> then I noticed the speedometer was buried. I looked at the GPS before
>>> lifting, and it was reporting 90.
>>>
>>> There seemed to be a bit more in there, but I was not about to try it
>> then.
>>>
>>> Dolph
>>>
>>> DE AD0LF
>>>
>>> Wheeling, West Virginia
>>>
>>> 1977 26’ ex-PalmBeach
>>> Howell EFI & EBL, Reaction Arms, Manny Transmission
>>>
>>> “The Aluminum and Fiberglass Mistress”
>>>
>>> |[ ]~~~[][ ][] \
>>> "--OO--[]---O-"
>>>
>>>> On Dec 5, 2020, at 5:01 PM, John Phillips via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>>
>>>> What is the top speed for a stock GMC 455 with the stock gearing?
>>>>
>>>> On Sat, Dec 5, 2020 at 1:39 PM James Hupy via Gmclist >>> gmclist@list.gmcnet.org> wrote:
>>>>
>>>> > A few years ago, I was in B.C. Canada visiting some of my Canadian
> GMC
>>>> > friends, and we attended a car show at Abbotsford, B.C. You might
>>> imagine
>>>> > my surprise over walking into the competition car section and almost
>>>> > falling over when I encountered a slingshot dragster that I used to
>>> pilot
>>>> > when it was owned by a car club in Oregon. I always kinda wondered
>> what
>>>> > ever became of it. The current owner bought it at a auction, and
>> didn't
>>>> > have any history of the car. I filled him in on some of it while I
> was
>>>> > driving it. It was in eventually the same condition as it was when I
>>> drove
>>>> > it. A blast from the past, for sure. It had an injected DeSoto Hemi
>> for
>>>> > power, Ran in the high 140's - low 150's Can't remember the E.T.'s,
>> but
>>> it
>>>> > was competitive for the time.
>>>> > I would guesstimate that for a GMC to run in the 140 mph speed,
>> that
>>>> > it would have to sustain 1400 - 1500 horsepower through the measured
>>> mile
>>>> > at Bonneville. A tall task for an Oldsmobile in my opinion.
>>>> > Jim Hupy
>>>> > Salem, Oregon
>>>> >
>>>> > On Sat, Dec 5, 2020, 12:56 PM Larry Nelson via Gmclist >>> > gmclist@list.gmcnet.org> wrote:
>>>> >
>>>> >> Jim, when I used the term "slingshot" to my son in law, he looked
> at
>> me
>>>> >> like I had two heads. We were watching NHRA on the tube. I had to
>>>> > explain.
>>>> >> --
>>>> >> Larry Nelson Springfield, MO
>>>> >> Ex GMC'er, then GM Busnut
>>>> >> now '77 Eleganza ARS WB0JOT
>>>> >>
>>>> >> _______________________________________________
>>>> >> GMCnet mailing list
>>>> >> Unsubscribe or Change List Options:
>>>> >> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> >>
>>>> > _______________________________________________
>>>> > GMCnet mailing list
>>>> > Unsubscribe or Change List Options:
>>>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> >
>>>>
>>>>
>>>> --
>>>>
>>>> *John Phillips*
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.gmcrvparts.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Is 142 MPH possible? [message #360556 is a reply to message #360550] |
Sat, 05 December 2020 18:36 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
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Like any of you to get to 100mph in one mile.
Yes, My Royal with 540 Twin Turbo can go 100 in one mile.
On Sat, Dec 5, 2020 at 2:23 PM James Hupy via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I have buried the speedometer on numerous occasions. Mine has a 90 mph
> clock. Never checked that to be precisely correct. Next time I try, I will
> check it with a GPS. It still had some left in it.
> Jim Hupy
> Salem, Oregon
>
> On Sat, Dec 5, 2020 at 2:06 PM Dolph Santorine via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> This is going to get interesting.
>>
>> I’ve done 90 in mine. I was not going after anything at that speed. I
>> didn’t have cruise, it was flat pavement and a windless beautiful day,
> and
>> then I noticed the speedometer was buried. I looked at the GPS before
>> lifting, and it was reporting 90.
>>
>> There seemed to be a bit more in there, but I was not about to try it
> then.
>>
>> Dolph
>>
>> DE AD0LF
>>
>> Wheeling, West Virginia
>>
>> 1977 26’ ex-PalmBeach
>> Howell EFI & EBL, Reaction Arms, Manny Transmission
>>
>> “The Aluminum and Fiberglass Mistress”
>>
>> |[ ]~~~[][ ][] \
>> "--OO--[]---O-"
>>
>>> On Dec 5, 2020, at 5:01 PM, John Phillips via Gmclist > gmclist@list.gmcnet.org> wrote:
>>>
>>> What is the top speed for a stock GMC 455 with the stock gearing?
>>>
>>> On Sat, Dec 5, 2020 at 1:39 PM James Hupy via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>>> A few years ago, I was in B.C. Canada visiting some of my Canadian GMC
>>>> friends, and we attended a car show at Abbotsford, B.C. You might
>> imagine
>>>> my surprise over walking into the competition car section and almost
>>>> falling over when I encountered a slingshot dragster that I used to
>> pilot
>>>> when it was owned by a car club in Oregon. I always kinda wondered
> what
>>>> ever became of it. The current owner bought it at a auction, and
> didn't
>>>> have any history of the car. I filled him in on some of it while I was
>>>> driving it. It was in eventually the same condition as it was when I
>> drove
>>>> it. A blast from the past, for sure. It had an injected DeSoto Hemi
> for
>>>> power, Ran in the high 140's - low 150's Can't remember the E.T.'s,
> but
>> it
>>>> was competitive for the time.
>>>> I would guesstimate that for a GMC to run in the 140 mph speed,
> that
>>>> it would have to sustain 1400 - 1500 horsepower through the measured
>> mile
>>>> at Bonneville. A tall task for an Oldsmobile in my opinion.
>>>> Jim Hupy
>>>> Salem, Oregon
>>>>
>>>> On Sat, Dec 5, 2020, 12:56 PM Larry Nelson via Gmclist >>> gmclist@list.gmcnet.org> wrote:
>>>>
>>>> > Jim, when I used the term "slingshot" to my son in law, he looked at
> me
>>>> > like I had two heads. We were watching NHRA on the tube. I had to
>>>> explain.
>>>> > --
>>>> > Larry Nelson Springfield, MO
>>>> > Ex GMC'er, then GM Busnut
>>>> > now '77 Eleganza ARS WB0JOT
>>>> >
>>>> > _______________________________________________
>>>> > GMCnet mailing list
>>>> > Unsubscribe or Change List Options:
>>>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> >
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>>
>>>
>>> --
>>>
>>> *John Phillips*
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Is 142 MPH possible? [message #360560 is a reply to message #360514] |
Sun, 06 December 2020 00:43 |
NextGenGMC
Messages: 146
Registered: December 2017
Location: Washington State
Karma: -1
|
Senior Member |
|
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Fist of all, I do appreciate being reminded that GMC held MH land speed record for 40 years. That is truly a good perspective and something to be proud of.
Second, while the new record holder may contain a bed, I would not call it a Motorhome. The most optimistic description of it is a camper van.
Thirdly, it appears that there is no requirement for the vehicle to maintain original power plant in order to attempt the record. The VW had an engine and a turbo that did not come with it initially.
There are many engines out there that can provide enough power to move a 26' GMC at appropriate speed to attempt the record, but the difficulty seem to be transferring all that power from the engine to the ground, i.e. transmission capability at high speed and with all that power.
With that I'd say - all is fair in love and war... What if we skip 455/TH combination and put in a jet engine in the back. We definitely got enough space for that and you don't have to worry about transmission coming up on its limits. We can leave a kitchen and a bed up in front to make sure it is still a more comfortable Motorhome that the sad little VW...
Vadim Jitkov
'76 Glenbrook 26'
Pullman, WA
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| Re: Is 142 MPH possible? [message #360596 is a reply to message #360514] |
Mon, 07 December 2020 12:24 |
TR 1
Messages: 348
Registered: August 2015
Location: DFW
Karma: -7
|
Senior Member |
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Was reading the other day Rocket Racing has a compacted graphite iron block casting available...
In addition to the CGI, it's supposed to be strengthened in the known weak areas of the Olds block...
https://www.enginelabs.com/engine-tech/big-block-olds-lives-rocket-racings-killer-casting/
Yes you could swap out the motor for something else, but to me it would be a point of pride to set a record using what came with the vehicle as made....
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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