Re: Ignition Tuning

[Bill <Y1TopBanana73@xxxxxxxxx>]

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I guess what I'm going on most is past experience. Years ago I put a
Holley 600 and factory cast iron 4 bbl manifold on my 73 Dart Sport w/
a 318 and 2.76 gears. With that change alone, there was a huge
difference it's performance. I guess I figured that with a little bit
of a cam and a 4 bbl with a SLIGHTLY steeper gear, I would see more
increase than I did. I realize it's not gonna run like a stroker or a
big block, but it shouldn't act like a 2bbl under 3500 rpm. The cam is
only a .450" lift, double roller timing chain, & everything else is
bone stock. I'll have to dig up the cam card for specs. It's going to
get new exhaust (has 2" now) and I'm thinking about 3.23's. If I could
find a set of headers cheap I would do 'em too.

Bill M
65 Coronet 500 'vert
http://1962to1965mopar.ornocar.com/mmo62008.html

On Sun, Mar 8, 2009 at 5:54 PM, Herb <zephyr9900@xxxxxxxxxxx> wrote:
>
>
> Bill,
>
> A cruiser, well if you were looking for the cam lope to impress as you
> slowly roll by you have to accept the bad performance or spend the money to
> make it work (Run Good)!  What duration is the cam big duration kills
> lowend?  Your 2.93 is killing you no torque no pull.  When you put a big
> lift & especially big duration cam in you loose low end power and have to
> compensate for it by lowering your rear end gears.    Also you probably have
> a big converter that is killing you also.  You need at minimum to find a
> small factory one out of a performance car, Junkyards should have them
> fairly cheap.  Their are a lot of variables to look at like what kind of
> timing chain & gears did you use as a lot of after market ones need to be
> dialed in with offset keys, what kind of intake are you using because a
> single plain is a torque killer, what kind of headers and exhaust are you
> using because big tubes kill torque, were is your timing set at, jetting on
> the carb and so on.  Changing just a cam almost always or at least 99% of
> the time has the outcome your experiencing.   The cam is down on the list of
> needed parts for performance Enhancers.  List what All you have done to the
> engine and what bolt on power adders you have.  Then we can start you down
> the road to recovery!!  (-;
>
>    
>  Herb
>
> 1959 Coronet 326 Poly
> 1963 Fury 2D/HT 6.1
> 1963 Sport Fury Convertible 361
> 1970 Challenger RT 440
> 1999 Durango SLT 5.9
> 2006 300-C Heritage 5.7
> 2008 SRT-8 Magnum 6.1
> St. Louis, MO.
>
>
> -------Original Message-------
>
> From: Bill
> Date: 03/08/09 15:41:13
> To: 62-65 Mopar List
> Subject: Ignition Tuning
>
> OK...now that I have the cam FINALLY broken in, and a carb kit on the
> way for my AVS, I need to do some fine tuning. When I put my buddies
> Edelbrock carb (box stock and untouched) on the car for break in, it
> seemed to run pretty well. But when we drove it, it didn't seem to
> have much more power than my stock 2bbl setup @ lower rpm's, and it
> wasn't super impressive @ the higher end. I'm guessing tuning the
> distributor is next and I've never messed with ignition curving before
> so I definitely need some help. Besides tuning the distributor and
> some tweaks on the carb, what else can I do to it?
>
> For now I'm be running a Carter AVS, Pertronix electronic ignition,
> .450 lift cam, stock convertor, and 2.93 gears. This car is a cruiser,
> but I want some power ans expected much more from the swap right away.
> Was I Wrong? Suggestions?
>
> Thanks!
> --
> Bill M
> 65 Coronet 500 'vert
> http://1962to1965mopar.ornocar.com/mmo62008.html

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