Re: big block exhaust manifolds

[moparbikeguy@xxxxxxx]

Sounds like '68 '69 B body manifolds are the way to go. This thing has been so much fun, it should be illegal. Now it's time to be on the freeways more. It's got so much torque that choking it back a bit may even help performance.


'65 Coronet 500 stroker


-----Original Message-----
From: Steven Charette <stevec@xxxxxxxxxxxxxxxxxxxx>
To: 1962to1965mopars@xxxxxxxxxx
Sent: Thu, Oct 22, 2009 8:41 am
Subject: RE: big block exhaust manifolds




O,
   Alot of the FAST guys are extrude honing their exhaust manifolds to
mprove flow.  They're running low 11's through full exhaust - it might not
e as bad as you think.  Besides, you're not trying to kill a set of clocks
o although it won't run as well as if you had headers, it'll still make
lenty of power.  Not sure what it costs or where to have it done, but it
ight just be the ticket.
    IMHO 6000 RPM is probably not going to be productive - we did a good
eal of header testing and we found that the 1 5/8" Schumacher tri-Y headers
ade better power down low than 2" headers, but above 5800 rpm the power
ropped off so fast that it would unload the suspension on the 1-2 shift (at
51ci).  It will be less dramatic at less CI and lower compressions.  I'm
uessing manifolds will be a little worse.  You might want to tune your
ackage to make power down low where the manifolds won't restrict you so
uch.
   
C
-----Original Message-----
rom: MO ( Steve Mick) [mailto:micher@xxxxxxxxxxxxxxx] 
ent: Wednesday, October 21, 2009 8:08 PM
o: 1962to1965mopars@xxxxxxxxxx
ubject: Re: big block exhaust manifolds

 obtained a set of late 60's 383 Magnum- HP 440Exhaust manifolds for my 64
odge440. It looks like they are going to fit real well. 2 1/2 " outlets..I
onder how they are going to do with ported heads, large valves, and .500+
ift cam at 6000 RPM??????.................................MO
---- Original Message -----
rom: <moparbikeguy@xxxxxxx>
o: <1962to1965mopars@xxxxxxxxxx>
ent: Wednesday, October 21, 2009 4:38 PM
ubject: 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
ame of the game for me.


 '65 Coronet 500 stroker

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