re; dual exhaust on a 69 Lebaron. I had a local shop (castlerock, Co) put
duals on my 69 Lebaron several years ago and have had no problems. However for
some reason they didn't put on an H pipe, so I had my local Midas shop add one
and it really improved the sound and the performance. Now I'd like to pick the
brains of any experts on the 69 Imperial.
1. What is the best plug for this 440? ( I'm just not sure about Champions
anymore.
2. Is rebuilding the original Holley the best way to go? I can't get used
to the lack of external float adjustments. The AFB of a few years earlier sure
seemed to deliver trouble free performance.
3. I like to keep things pretty much all Mopar but when it comes to wheels I
confess to using 8" GM truck Ralley (sp?) wheels on my 69 Lebaron. They are a
5 on 5" pattern and have zero offset no scrape, no bind. The only change
needed was to go to a 13/16" lug nut (as opposed to the Mopar 3/4") Results are
better handling, better tire life and the capability to use bigger tires.
According to the Tire manufactures guide the optium size tire for 6" wheels
(that came stock on the 69 Lebaron) is only a 215/75 R 15) In case I should be
more specific my wheels are from an 1984 2whd C10 Suburban. These wheels were
used on 2whd GM half ton (and 3/4 ton vans) from the mid 70s to the late 80s
the pickups changed in 1988 but suburbans,vans and 2whd Blazers/Jimmys remained
until 1992.
4. Did Imperials use the 5 on 5 1/2" in 1966?
I will be very grateful for any and all comments.
Jim 69 Lebaron Coupe
> I have had duals installed by Midas on my 70 Newport and my 72 Imperial
> with no problems at all. No resonators either and I am not sure what the
> noise problem seems to be unless you want whisper quiet. For myself a big
> block Mopar, be it Imperial or otherwise, needs to breathe and express
> itself. Both have H pipes as this is fairly standard for increased torque
> and are 2 1/2 " systems. It is a bit expensive at Midas but they do a good
> job and have good warranty. Single exhaust just chokes that engine,duals are
> one of the simplest mods to increase efficiency.
>
> R. Giesbrecht
>
> ello all;
> This is somewhat of a dumb question but since the fuselage cars can't fit
> a
> dual exhaust easily could one just use a larger diameter single pipe? I
> know
> that the dual pipes are used for cutting down on the back pressure but
> could
> you achieve similar results by using, lets say, a 4''inch single in place
> of
> a 2-1\4'' single? Just speculating, I don't even know if you could get a
> 4''
> pipe or the muffler to fit it.
> Best Regards
> Arran Foster
> 1954 Imperial Newport
> Needing A Left Side Taillight Bezel and other trim parts.
>
> ----- Original Message -----
> From: "Elijah Scott" <imperial1971@xxxxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Friday, January 03, 2003 10:03 AM
> Subject: Re: IML: Exhaust Question....
>
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