>mike my idle is rock steady and the car drives like it was just tuned all
>the
>time with this mod.
Just like it would be with a stock ingintion system. Modern ignition
systems do not need to be tuned, just periodic replacment of the distributor
cap, rotor, wires and plugs is needed, just like it will be with an MSD.
if there was away to measure how fast rpms increase
>toward redline,i would bet my life that with my msd it gets there noticibly
>quicker.
There is a device that does just that, a Dynojet chassis dynomometer. The
dynojet measures rate of change when accelerating a drum of a known weight.
I use a dynojet for most of my testing.
also at wot the stock computer slightly richens the mixture to
>combat detonation. msd guarantees than all the fuel will be burned.this is
>a
>good thing!
All the fuel is burned even with a stock ignition. Nissan ECU's richens the
mixture on a GA16 to about 12:1 at wide open throttle. Let me assure you
that this is in no way too rich and there is not extra unburned fuel lying
around waiting to be ignited. Even if the mixture was very rich, like 10:1
then all of the fuel would still burn, just at a lower less efficent
temperature. The Stock GA runs about the leanest of all Nissan with stock
tuning at WOT.
have you ever installed one? this is my fifth.
I use MSD ignitions exclusivly in all highly built cars that I am involved
with. In my opinion MSD is the best when you consider reliability as well
as spark power.
ever get caught in
>the wrong gear and try to accelerate. with the msd you can still muster
>up to speed at a decent rate without bucking the engine.
As will the stock ignition.
>one may argue that it is just compensating for weak ignition components but
>this isnt the case five times over. why do we replace spark plugs and
>wires?
>ill tell you old components have more resistance,therefore a loss of spark
>energy is had across the electrode,resulting in loss of power and a less
>responsive engine.more spark can be
>felt just like a new set of plugs. every engine with any amount of milage
>is
>less than perfect. msd compensates for less than perfect running conditions
>and restores lost power and response.
In the case of worn spark plug electrodes the MSD may perform better, but an
MSD can aggrivate poor running from bad distributor caps and wires by
causing arching. Also the powerful spark from an MSD can cause the
distributor cap and rotor to wear faster and the plug wires to break down
faster if bigger plug gaps are used. Standard plugs also wear faster with
an MSD.
Now people with really built motors don't care because these parts are cheap
and an MSD is the only way to avoid misfire in many cases with highly
modifed motors, so they are willing to accept this minor trade off.
i know youre the man mike but i have
>argued this point many times. youre right about no dyno proven power with
>an
>msd but on the fly responsiveness is another issue.
And I assure you on a bone stock motor, it does not make a difference, nor
will it on a motor with just headers, exhaust and a CAI. If you get cams
big enough to lope at idle, more than 10:1 compression, a turbo or nos, then
an MSD helps or starts to become essential. Your seat of the pants can be
deceving, I don't trust mine as the dyno has proved me wrong plenty of
times.
If you have a near stock motor, you are better off getting a header, a
catback exhaust, a CAI, some UD pulles and cams before you spend the money
on a MSD.
Mike
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