RE: big block exhaust manifolds

[Bill <hemirr@xxxxxxxxxxx>]

I think the 70 E body version changed the "clocking" of the outlet bolt holes compared to the earlier B version, which could be of value where there's a tight fit.  But I've heard that they'll work pretty well in early B's.  Like Steve said, maybe not going to be ideal with that big cam at high RPM. On the FAST guys, I think they have cam choices figured out to keep from breaking the tires loose too easily on launch but add in more and more power once underway.  I'm not sure how though.


Bill & Kathi Parker, South Central Indiana '60 Chrysler Saratoga kustom; '62 Plymouth Max Wedge; '64 Dart convertible; '65 Barracuda \6; '65 Imperial; '68 Barracuda FB 340-S; '69 Barracuda FB now 360; '70 Challenger now 440; '72 Cuda '340


 
> To: 1962to1965mopars@xxxxxxxxxx
> From: stevec@xxxxxxxxxxxxxxxxxxxx
> Subject: RE: big block exhaust manifolds
> Date: Thu, 22 Oct 2009 09:41:45 -0400
> 
> 
> MO,
> Alot of the FAST guys are extrude honing their exhaust manifolds to
> improve flow. They're running low 11's through full exhaust - it might not
> be as bad as you think. Besides, you're not trying to kill a set of clocks
> so although it won't run as well as if you had headers, it'll still make
> plenty of power. Not sure what it costs or where to have it done, but it
> might just be the ticket.
> 
> IMHO 6000 RPM is probably not going to be productive - we did a good
> deal of header testing and we found that the 1 5/8" Schumacher tri-Y headers
> made better power down low than 2" headers, but above 5800 rpm the power
> dropped off so fast that it would unload the suspension on the 1-2 shift (at
> 451ci). It will be less dramatic at less CI and lower compressions. I'm
> guessing manifolds will be a little worse. You might want to tune your
> package to make power down low where the manifolds won't restrict you so
> much.
> 
> SC
> 
> -----Original Message-----
> From: MO ( Steve Mick) [mailto:micher@xxxxxxxxxxxxxxx] 
> Sent: Wednesday, October 21, 2009 8:08 PM
> To: 1962to1965mopars@xxxxxxxxxx
> Subject: Re: big block exhaust manifolds
> 
> 
> I obtained a set of late 60's 383 Magnum- HP 440Exhaust manifolds for my 64
> Dodge440. It looks like they are going to fit real well. 2 1/2 " outlets..I
> wonder how they are going to do with ported heads, large valves, and .500+
> lift cam at 6000 RPM??????.................................MO
> ----- Original Message -----
> From: <moparbikeguy@xxxxxxx>
> To: <1962to1965mopars@xxxxxxxxxx>
> Sent: Wednesday, October 21, 2009 4:38 PM
> Subject: big block exhaust manifolds
> 
> 
> >
> >
> > I know that a lot of guys are using the later model so called high 
> > performance exhaust manifolds on their 440 powered early B bodies. 
> > Which ones fit our cars the best? There seem to be quite a few 
> > different ones. I know that going from my headers to manifolds is 
> > going to cost some power on my stroker, but "street is neat" is the new
> name of the game for me.
> >
> >
> > '65 Coronet 500 stroker
> >
> > [Non-text portions of this message have been removed]
> >
> >
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> >
> > '62 to '65 Mopar Clubhouse Discussion Guidelines:
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> >
> >
> > 
> 
> 
> ----
> Please address private mail -- mail of interest to only one person --
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> topic. Thanks!
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> '62 to '65 Mopar Clubhouse Discussion Guidelines:
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> 
> 
> ----
> Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!
> 
> '62 to '65 Mopar Clubhouse Discussion Guidelines:
> http://www.1962to1965mopar.ornocar.org/mletiq.html. 
> 
> 
> 
 		 	   		  
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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.