RE: big block exhaust manifolds

[Steven Charette <stevec@xxxxxxxxxxxxxxxxxxxx>]

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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> 


----
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. 


----
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.