Re: [AMC-list] High Flow Exhaust Manifolds

[John Lunde <lunde@xxxxxxxxxx>]

Thanks to all of you who responded to my question.  It was much appreciated.
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Today's Topics:

   1. Re: High Flow Exhaust Manifolds (Jim Blair)
   2. Re: High Flow Exhaust Manifolds (Sandwich Maker) (John Lunde)
   3. Re: High Flow Exhaust Manifolds (Sandwich Maker) (Sandwich Maker)
   4. AMC Javelin Breedlove MOD roof spoiler (Eddie Stakes)
   5. Len Legere's custom AMC Javelin (Eddie Stakes)
   6. hot rod online newsletter (Eddie Stakes)


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Message: 1
Date: Thu, 26 Jan 2012 12:06:19 -0800
From: Jim Blair <carnuck@xxxxxxxxxxx>
To: <amc-list@xxxxxxxxxxxx>
Subject: Re: [AMC-list] High Flow Exhaust Manifolds
Message-ID: <SNT114-W174CE74B9171F46123E30EAC890@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"

It also allows for misaligned holes from the factory, unlike the later 4 cyls. A LOT of Jeepers have trouble getting the back one started (I put in a threaded stud and STILL had trouble with the rest!)
   I do recall some years having 2 different size bolts though

From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)
To: amc-list@xxxxxxxxxxxx
Subject: Re: [AMC-list] High Flow Exhaust Manifolds
Message-ID: <201201261350.q0QDoSm28204@xxxxxxxxxxxxxxxxx>

" From: lunde@xxxxxxxxxx
"
" I have a pair of high flow AMC exhaust manifolds casting#'s 3210160 and
" 3210159. I plan to put these on my 68 AMX 390 which already has a pair of
" later model dog-leg heads, and was wondering why the mounting holes on the
" manifold are a larger diameter on the outside of the manifold, then the 2
" bolt holes on the inside given that all the bolts on the cylinder head are
" the same diameter? Does anyone know why this is? Seems funny to me that only
" the center holes are responsible for lining up the ports on the head to the
" manifold!

wild guess - maybe it's to allow for expansion when that iron gets red
hot.
________________________________________________________________________
Andrew Hay the genius nature
internet rambler is to see what all have seen
adh@xxxxxxxxxxxxxxxxx and think what none thought

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Message: 2
Date: Thu, 26 Jan 2012 20:36:42 +0000
From: John Lunde <lunde@xxxxxxxxxx>
To: "amc-list@xxxxxxxxxxxxxxxxx" <amc-list@xxxxxxxxxxxxxxxxx>
Subject: Re: [AMC-list] High Flow Exhaust Manifolds (Sandwich Maker)
Message-ID:
        <D90E41D5B51D2148AA42249A67015E5B28B95993@xxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"

Could be for expansion, but why then is there no allowance for expansion in the 2 inner bolt holes?

I guess I'm just used to headers and not aware of this.

Does anyone else have an opinion as I would gladly listen to all theories!?!?

Thanks,

John
*******************
wild guess - maybe it's to allow for expansion when that iron gets red
hot.
*******************

" From: lunde@xxxxxxxxxx(original message)
"
" I have a pair of high flow AMC exhaust manifolds casting#'s 3210160 and
" 3210159. I plan to put these on my 68 AMX 390 which already has a pair of
" later model dog-leg heads, and was wondering why the mounting holes on the
" manifold are a larger diameter on the outside of the manifold, then the 2
" bolt holes on the inside given that all the bolts on the cylinder head are
" the same diameter? Does anyone know why this is? Seems funny to me that only
" the center holes are responsible for lining up the ports on the head to the
" manifold!


------------------------------

Message: 3
Date: Thu, 26 Jan 2012 17:25:30 -0500 (EST)
From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)
To: amc-list@xxxxxxxxxxxxxxxxx
Subject: Re: [AMC-list] High Flow Exhaust Manifolds (Sandwich Maker)
Message-ID: <201201262225.q0QMPUr02714@xxxxxxxxxxxxxxxxx>

" From: John Lunde <lunde@xxxxxxxxxx>
"
" Could be for expansion, but why then is there no allowance for expansion in the 2 inner bolt holes?

not enough expansion across the distance between center holes.  much
more across whole length.

" I guess I'm just used to headers and not aware of this.

headers aren't as rigid and stiff as cast iron manifolds.  and while
the tubes get hot, they don't conduct as much heat to the flange as an
iron manifold does.

there are engines where the exhaust manifold -must-not- be installed
with a gasket, as conducting its heat into the head's water jacket is
intentional and necessary.

" Does anyone else have an opinion as I would gladly listen to all theories!?!?
"
" Thanks,
"
" John
" *******************
" wild guess - maybe it's to allow for expansion when that iron gets red
" hot.
" *******************
"
" " From: lunde@xxxxxxxxxx(original message)
" "
" " I have a pair of high flow AMC exhaust manifolds casting#'s 3210160 and
" " 3210159. I plan to put these on my 68 AMX 390 which already has a pair of
" " later model dog-leg heads, and was wondering why the mounting holes on the
" " manifold are a larger diameter on the outside of the manifold, then the 2
" " bolt holes on the inside given that all the bolts on the cylinder head are
" " the same diameter? Does anyone know why this is? Seems funny to me that only
" " the center holes are responsible for lining up the ports on the head to the
" " manifold!
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought


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