| Re: [GMCnet] GMC STOCK CAST IRON INTAKE [message #352794] |
Sun, 15 March 2020 23:50 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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On Sun, Mar 15, 2020 at 9:47 PM Jim Kanomata wrote:
> We supply the AL Intake manifold that is custom machined to fit the
> Motorhome a
>
> On Sun, Mar 15, 2020 at 6:51 PM Jon Roche via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> I am no expert, and maybe someone can put the engineering thoughts to
>> the exact number. But my opinion there is very little to gain in
>> performance
>> by switching to any different manifolds. we run lower rpm, so really do
>> not need huge flow. I am sure there is some improvement, but not sure it
>> is worth anything. The reason to change manifolds is all based on other
>> factors.
>>
>>
>> my observations, is that many of the original manifolds are coming up
>> cracked. So the idea of new manifold is appealing. People install block
>> off
>> plates, and also fill the crossover, but if you can buy a new manifold,
>> why not? last year I seen a stack of 7 cracked manifolds, and at that point
>> the GMC'r decided to order up the aluminum one rather then keep trying to
>> see if manifold #8 or 9 was any good.
>>
>> I see many edlebrock performer manifolds installed. I have also seen
>> people machining the carb surface to get it more level and also allow for a
>> little more clearance.
>>
>> if you want to stick with the stock air cleaner, clearance is an issue.
>> The stock manifold and the aluminum one that seems to be now sourced through
>> mondello, keep that profile so you have more clearance and should not
>> need to raise the hatch of a 455 engine coach. Even with my EFI,
>> clearance
>> is very tight to get the remote air cleaner to fit. just having a little
>> thinner adaptor plate made a difference.
>>
>>
>> --
>> Jon Roche
>> 75 palm beach
>> EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
>> St. Cloud, MN
>> http://lqqkatjon.blogspot.com/
>>
>> _______________________________________________
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>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.gmcrvparts.com
> 1-800-752-7502
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.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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