My Charger had a set of 1-5/8 primary tube headers, but it could have used a
set of 1-3/4 primary tube headers with the 380 magnum crate motor it
had.........it also had 2-1/2 inch mandrel bent
dual exhaust with THRUSH mufflers, THIS CAR MADE 300 FT/LBS AT 1200 RPM, and
the torque remained flat, never dropping below 250 thru the 5,500 redline I
had on it.
My '96 used a set of MOPAR PERF 2.5 magnum headers(very rare and hard to get
kit) that had 1-1/2
primarys and a stock hookup to the front headpipe
it also had a dynomax catback exhaust, it ran very well,.......and better
than stock probably picked up an easy 20hp with everything I did to that
Dak!!
Ron- '01 Dakota Sport 3.9 Supercharged
website: www.scsilverdak.com
e-mail: scsilverdak@hotmail.com
----- Original Message -----
From: "Jon N. Benignus" <blkwidow1@primary.net>
To: <dakota-truck@dakota-truck.net>
Sent: Tuesday, August 20, 2002 3:37 AM
Subject: Re: DML: Re: RE: Re: RE: Header Install
>
> > I've installed headers before on stock engines and have never seen a
> > downside to them.
> Headers CAN hurt performance-if they are the wrong length and diameter.
> Stock to mildly warmed over street engines need small diameter, long tube
> headers to make torque.
> The big diameter only helps for highly modified, high rpm engines that
> really have a lot of volumetric efficiency-they move a lot of air.
> Engines are nothing more than air pumps. I remember from my younger days
the
> hot headers for 318-340 Mopars had 1-5/8 diameter tubes-today, people
would
> say, WHAT? You gotta have 3 to 4 inch pipes! Yup, for sound. Headers
really
> woke up the old 318 2 bbl in a heavy old Charger. But I'd bet the pipes
were
> small and the collectors were real long. Perfect for making torque, which
> those things needed. Just dual exhaust with stock mufflers helped a bunch.
I
> know, I had a few of them. As Scotty would say, "You cannot change the
laws
> of physics."
> A great example is the guy who buys a new Harley. What's the first thing
he
> does? Yup, big diameter straight pipes. Sounds great, but I'll bet he
loses
> 10 hp and a bunch of torque on the bottom end and midrange, and has no top
> end, because the carb is way too lean and the cam too small to make any
> power with the increased flow he got. And Harleys can't afford to lose ANY
> power. But, it sounds better, so it is "faster". Slap some small diameter,
> long pipes on it, and watch the hp and tq jump in the bottom and midrange,
> right where a HD runs. They don't make any power over 5k (stock) anyway,
and
> won't last long there, either.
>
> Jon
> STL MO
>
>
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