Home » Public Forums » GMCnet » [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum?
| [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105505] |
Tue, 09 November 2010 00:59  |
980
Messages: 192
Registered: July 2010
Location: United States
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Well, the saga continues, but more serious testing reveals that after
about 10-15 miles of warm up, there's a miss. But it's not consistently
on the same cylinders. The miss moves around. We're suspicious of the
intake manifold. Something may have happened to it after we'd gotten
the crud off of the bottom of it and blocked the exhaust crossover. It
worked great for about a day and a half afterwards. Lots of power, felt
great. We took a trip to the coast to get our pumpkin and the next day
started having power issues and pinging.
Here's the question. We have a full-height intake on there now and a
raised section in the floor for it. I wouldn't mind having a flat one.
What are the advantages of a low profile versus a high-profile intake?
Is a new aluminum one, (Rockwell?) a big enough improvement to justify
the $600?
What would you do/have you done?
Thanks,
DC
--
1977 GMC ex-Palm Beach, 26-3
Treasure Island, CA
KC6VHG, KAG0675 "980"
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105542 is a reply to message #105505] |
Tue, 09 November 2010 14:05  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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There were certainly compromises made to get the low-profile manifold, but it works best in our application as the flat floor is a positive.
Since there is no real alternative if you want a new manifold, the aluminum one is the way to go. I do like the ability to add multiport fuel injection to the Rockwell manifold as well if desired. Is it worth the money? I don't think he is getting rich off these, and he deserves something for his efforts to bring this product to market.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105544 is a reply to message #105542] |
Tue, 09 November 2010 14:17 |
980
Messages: 192
Registered: July 2010
Location: United States
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I've got a '77 in California. I need to pass smog still. Is the EGR valve port really missing off of these and is that going to screw me up at the DMV?
DC
On Nov 9, 2010, at 12:05 PM, George Rudawsky wrote:
>
>
> There were certainly compromises made to get the low-profile manifold, but it works best in our application as the flat floor is a positive.
>
> Since there is no real alternative if you want a new manifold, the aluminum one is the way to go. I do like the ability to add multiport fuel injection to the Rockwell manifold as well if desired. Is it worth the money? I don't think he is getting rich off these, and he deserves something for his efforts to bring this product to market.
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
> _______________________________________________
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105546 is a reply to message #105544] |
Tue, 09 November 2010 14:30 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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| 980 wrote on Tue, 09 November 2010 14:17 |
I've got a '77 in California. I need to pass smog still. Is the EGR valve port really missing off of these and is that going to screw me up at the DMV?
DC
|
To my knowledge the GMC never had an EGR or EGR manifold out of the factory. I have a 76 built for California and it does not have an EGR. I have never seen and EGR on a GMC. Ask Jim K. or Miguel for sure.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105547 is a reply to message #105546] |
Tue, 09 November 2010 14:48 |
James Hupy
Messages: 6806
Registered: May 2010
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Desmond, I have never seen, nor does the 77 & 78 Maintenence Manual picture
or describe an 455 or 403 with an EGR valve on a motorhome. Heavy Duty
vehicles, such as trucks and motorhomes, were exempt until I believe 1982 or
so from EGRs. That is not to say that Los Angeles Basin or CARB didn't have
local regulations that required them. It is possible that there were some
car manifolds fitted onto the 403 to replace a cracked intake manifold.
Jim Hupy
Salem, Or
78 Royale 403
On Tue, Nov 9, 2010 at 12:30 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>
> 980 wrote on Tue, 09 November 2010 14:17
> > I've got a '77 in California. I need to pass smog still. Is the EGR
> valve port really missing off of these and is that going to screw me up at
> the DMV?
> >
> > DC
>
> To my knowledge the GMC never had an EGR or EGR manifold out of the
> factory. I have a 76 built for California and it does not have an EGR. I
> have never seen and EGR on a GMC. Ask Jim K. or Miguel for sure.
>
> Ken B.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105554 is a reply to message #105547] |
Tue, 09 November 2010 16:44 |
980
Messages: 192
Registered: July 2010
Location: United States
Karma: -1
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Mine is a 455.
I'm trying to get on the road by the Alameda rally this weekend. So I was going to run to Fremont today, but they say that they don't have any of those new aluminum manifolds in stock.
Anywhere else I can get one reasonably quickly?
DC
On Nov 9, 2010, at 12:48 PM, James Hupy wrote:
> Desmond, I have never seen, nor does the 77 & 78 Maintenence Manual picture
> or describe an 455 or 403 with an EGR valve on a motorhome. Heavy Duty
> vehicles, such as trucks and motorhomes, were exempt until I believe 1982 or
> so from EGRs. That is not to say that Los Angeles Basin or CARB didn't have
> local regulations that required them. It is possible that there were some
> car manifolds fitted onto the 403 to replace a cracked intake manifold.
> Jim Hupy
> Salem, Or
> 78 Royale 403
>
> On Tue, Nov 9, 2010 at 12:30 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>>
>>
>> 980 wrote on Tue, 09 November 2010 14:17
>>> I've got a '77 in California. I need to pass smog still. Is the EGR
>> valve port really missing off of these and is that going to screw me up at
>> the DMV?
>>>
>>> DC
>>
>> To my knowledge the GMC never had an EGR or EGR manifold out of the
>> factory. I have a 76 built for California and it does not have an EGR. I
>> have never seen and EGR on a GMC. Ask Jim K. or Miguel for sure.
>>
>> Ken B.
>> --
>> Ken Burton - N9KB
>> 76 Palm Beach
>> Hebron, Indiana
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105556 is a reply to message #105554] |
Tue, 09 November 2010 17:11 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Try Howell at 1-810 765-5100 & beg for mercy.
Jim Hupy
Salem, Or
78 Royale 403
On Tue, Nov 9, 2010 at 2:44 PM, Desmond <980@opg.org> wrote:
> Mine is a 455.
>
> I'm trying to get on the road by the Alameda rally this weekend. So I was
> going to run to Fremont today, but they say that they don't have any of
> those new aluminum manifolds in stock.
>
> Anywhere else I can get one reasonably quickly?
>
> DC
>
> On Nov 9, 2010, at 12:48 PM, James Hupy wrote:
>
> > Desmond, I have never seen, nor does the 77 & 78 Maintenence Manual
> picture
> > or describe an 455 or 403 with an EGR valve on a motorhome. Heavy Duty
> > vehicles, such as trucks and motorhomes, were exempt until I believe 1982
> or
> > so from EGRs. That is not to say that Los Angeles Basin or CARB didn't
> have
> > local regulations that required them. It is possible that there were some
> > car manifolds fitted onto the 403 to replace a cracked intake manifold.
> > Jim Hupy
> > Salem, Or
> > 78 Royale 403
> >
> > On Tue, Nov 9, 2010 at 12:30 PM, Ken Burton <n9cv@comcast.net> wrote:
> >
> >>
> >>
> >> 980 wrote on Tue, 09 November 2010 14:17
> >>> I've got a '77 in California. I need to pass smog still. Is the EGR
> >> valve port really missing off of these and is that going to screw me up
> at
> >> the DMV?
> >>>
> >>> DC
> >>
> >> To my knowledge the GMC never had an EGR or EGR manifold out of the
> >> factory. I have a 76 built for California and it does not have an EGR.
> I
> >> have never seen and EGR on a GMC. Ask Jim K. or Miguel for sure.
> >>
> >> Ken B.
> >> --
> >> Ken Burton - N9KB
> >> 76 Palm Beach
> >> Hebron, Indiana
> >> _______________________________________________
> >> GMCnet mailing list
> >> List Information and Subscription Options:
> >> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >>
> > _______________________________________________
> > GMCnet mailing list
> > List Information and Subscription Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105570 is a reply to message #105505] |
Tue, 09 November 2010 18:25 |
Gerald Wheeler
Messages: 152
Registered: February 2004
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Desmond writes:
So I was going to run to Fremont today, but they say that they don't have
any of those new aluminum manifolds in stock.
I assume by Fremont you mean Applied GMC. If so, Applied GMC has an
aluminum manifold on Ebay for a "buy it now" for $560; cheaper than
ordering direct from JimK's web site. He must have quick access to some if
he doesn't have them in stock at his Fremont location. What say you
JimK??
JR Wheeler NC/OR
> [Original Message]
> From: Desmond <980@opg.org>
> To: <gmclist@temp.gmcnet.org>
> Date: 11/9/2010 2:44:59 PM
> Subject: Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum?
>
> Mine is a 455.
>
> I'm trying to get on the road by the Alameda rally this weekend. So I
was going to run to Fremont today, but they say that they don't have any of
those new aluminum manifolds in stock.
>
> Anywhere else I can get one reasonably quickly?
>
> DC
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105588 is a reply to message #105554] |
Tue, 09 November 2010 21:22 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| 980 wrote on Tue, 09 November 2010 16:44 |
Mine is a 455.
I'm trying to get on the road by the Alameda rally this weekend. So I was going to run to Fremont today, but they say that they don't have any of those new aluminum manifolds in stock.
Anywhere else I can get one reasonably quickly?
DC
On Nov 9, 2010, at 12:48 PM, James Hupy wrote:
|
Because you are an emailer I can not send you a PM. I also can not see your email address so...
Call Blaine Merrell
look up his phone number here:
http://www.bdub.net/blainemerrell/index.html
He has a bunch of them arriving tomorrow.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105589 is a reply to message #105554] |
Tue, 09 November 2010 22:14 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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I have 5-6 being shipped to us from the machine shop.
To my knowledge,there are none in the West, maybe DJ Eberheart might
have one left.
I just got back from dinner with Gary Rockwell, He had only the few
made this run as I had 6-8 in stock 3 weeks ago.
The New Super Pans are starting to move, they have more oil capacity
and more cooling fins and will not weap like the other trans pan.
Gary will have the New Final drive cover out soon.
On Tue, Nov 9, 2010 at 2:44 PM, Desmond <980@opg.org> wrote:
> Mine is a 455.
>
> I'm trying to get on the road by the Alameda rally this weekend. So I was going to run to Fremont today, but they say that they don't have any of those new aluminum manifolds in stock.
>
> Anywhere else I can get one reasonably quickly?
>
> DC
>
> On Nov 9, 2010, at 12:48 PM, James Hupy wrote:
>
>> Desmond, I have never seen, nor does the 77 & 78 Maintenence Manual picture
>> or describe an 455 or 403 with an EGR valve on a motorhome. Heavy Duty
>> vehicles, such as trucks and motorhomes, were exempt until I believe 1982 or
>> so from EGRs. That is not to say that Los Angeles Basin or CARB didn't have
>> local regulations that required them. It is possible that there were some
>> car manifolds fitted onto the 403 to replace a cracked intake manifold.
>> Jim Hupy
>> Salem, Or
>> 78 Royale 403
>>
>> On Tue, Nov 9, 2010 at 12:30 PM, Ken Burton <n9cv@comcast.net> wrote:
>>
>>>
>>>
>>> 980 wrote on Tue, 09 November 2010 14:17
>>>> I've got a '77 in California. I need to pass smog still. Is the EGR
>>> valve port really missing off of these and is that going to screw me up at
>>> the DMV?
>>>>
>>>> DC
>>>
>>> To my knowledge the GMC never had an EGR or EGR manifold out of the
>>> factory. I have a 76 built for California and it does not have an EGR. I
>>> have never seen and EGR on a GMC. Ask Jim K. or Miguel for sure.
>>>
>>> Ken B.
>>> --
>>> Ken Burton - N9KB
>>> 76 Palm Beach
>>> Hebron, Indiana
>>> _______________________________________________
>>> GMCnet mailing list
>>> List Information and Subscription Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Intake Manifold, Low-profile, Stock, or Aluminum? [message #105595 is a reply to message #105589] |
Tue, 09 November 2010 23:14 |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| jimk wrote on Tue, 09 November 2010 20:14 |
...
The New Super Pans are starting to move, they have more oil capacity
and more cooling fins and will not weap like the other trans pan.
...
|
Is there a difference in ground clearance between the "other trans pan" and the Super Pan?
What is the difference in oil capacity?
Just making my 5 year list....
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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