RE: Headers vs. manifolds

[ledman_70@xxxxxxxxxxx]

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The 426 is actually a bored 413 and will have 413 heads with some port 
work, so I assume most headers will fit. Thanks for the info on 
manifolds, Oh-be-wan!
Jeff
Earl Helm wrote:
> 
> Jeff,
> 
> Ok, that changes things. I would not mess with trying to square your
> headers away. I would just put stock manifolds on and enjoy the car
> while your building your new motor.
> 
> One word of caution with the Wedge thing. When your dealing with
> raised ports, depending on your block, you can run into some serious
> header issues in B bodies. If you run Wedge, or raised port heads on
> a 400 block, then stock 440 height headers will work, but if you run
> Wedge heads on a 440 block, then your going to get into all kinds
> of clearance issues. Not many headers made for this application that
> work well. Make sure you do your home work on the combo you decide
> on. Then double check it.
> 
> Earl
> 
> 
> Engine is totally stock except for cam and headers with over 100k on it,
> 
> heads were redone stock. Carb is original 4bbl. I don't mind spending 
> the money on good gaskets, but only if they will fix the leak. Another 
> issue is this only a temporary engine, as I plan on building a more 
> serious 426w I already have and installing TTI headers with THAT motor, 
> so I don't want to put a lot of money into the 413. Can you mill the 
> flange at home Earl? Thanks.
> Jeff
> Earl Helm wrote:
> > 
> > Jeff,
> > 
> > It depends on your carb. If your running an older Afb or Holly, then 
> > the headers will be very effective. They will be a good increase over 
> > stock manifolds anyway.
> > 
> > One reason headers are so effective with these engines is that the 
> > carbs naturally tend to be on the rich side because they are not the 
> > worlds best technology. So the headers help scavenge quite well and 
> > improve performance in the older engines much more that the new ones.
> > 
> > A couple of suggestions. Take your old headers off and either mill the
> 
> > flange or straighten it. It is not as hard as you think. I would also 
> > suggest investing 30 bucks in Copper gaskets for the headers. They 
> > will last a lifetime, and not leak.
> > 
> > Earl
> > 
> > 
> > 
> > I'd like some opinions on headers vs manifolds on a mild 413 in a 64
> > Polara. I have an old set of headers that I can't get to stop leaking
> at
> > 
> > the head. It's probably a bent center flange, but I've had 4 different
> > sets of gaskets in it, both header and stock steel gaskets. What I'd 
> > like to know is how much performance difference there is between the 
> > two. Right now I have a used 413 4bbl, 509 cam, headers/Flowmasters
> with
> > 
> > an H pipe. I'm considering going back to the stock manifolds from the
> > 413, which is out of a 65 Imperial. What do you guys think? Jeff
> > 
> > 
> 
> 
> 
> Jeff Adams
> 64 Polara
> 
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> 



Jeff Adams
64 Polara

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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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