whats the point in an msd box? i was told that those are only good on the old chevy and fords with a carb. you know the ones that take a minute to start while pumping the gas the whole time. as far as i know if you just have a strong battery you don't need one. my truck with the stock battery (600 cold cranking amps) used to have a slow start until i got an everstart maxx with 875CCA and 1000 cranking amps and now it'll really zing that starter and only takes about 1 second to start.

 

and the tb spacer is an awesome mod. its a pretty little 100$ piece of aluminum that ummm... well does nothing for performance.

 

Never heard of that way, I hope there is no capacitors. I think just unhooking the negative and then trying to start the engine clears the PCM just the same.

 

I used to run MSD box on my 77 Ford pickup<- it was highly modified but this is a Dodge forum not a Ford one so we will skip the details, loved the performance gain it gave. On my Dodge I have noticed some level of performance improvement, but lets face it, its a 4x4 big a@# tires not like it a 1/4 mile corner blaster. My reason for installing it on my Dodge is it burns the fuel completly instead of firing through 6 to 7 deg of crank rotation it fires through 20 to 22 deg causing a more complete burn. As most of you know the 5.9 is not know for its fuel economy.

And the TBI plate mainly for low end, nothing on high end and with the recent gear swap haven't noticed anything gained or lost far as fuel delivery or air flow problems. Plus as my kids friends put it "It looks Cool!"

 

No offense, but the TBI plate, spacer, whatever you want to call it, does nothing for our trucks. You don't get any low end out of it, any high end, nothing. Our trucks are not TBI.

 

all you have to do is look at the intake, its a big open space that all the cylinders pull air from, a tbi spacer just gives it two 1/2" by 52mm spaces that add a tiny amount of air space to the intake, which does nothing aside from raising your air box.

 

No offence, but I mis-spoke myself, every parts catalog you look in says TB spacer they don't call them MPI spacers unless you go directly to the ,they quote correctly. While we are on the subject of spacers if they do not improve the low end performance why do they sell them????

Well according to them this is why,

Trans-Dapt Performance Products' TORQUE-CURVE Multi-Port Fuel Injection (MPFI) Throttle Body spacers perform better than any other MPFI Spacer on the market…and quieter too.

HOW DO THEY WORK?
Like a two part epoxy, the air/fuel mixture in your engine needs to be a specific ratio of air to fuel, in order for it to work properly. Your vehicle's EFI system constantly adjusts this ratio to best suite the environmental and driving conditions at any given moment. If your engine needs more air, and your throttle body can't meet that need, your overall performance diminishes.

At partial throttle, a negative pressure zone forms on the upper back side of the throttle blade. Since air will always flow to a low pressure area, incoming air gets drawn to it, like a vacuum. This low pressure condition creates turbulence, which slow down the introduction of air in to your intake manifold. Less available air means, less available power.
Torque-Curve's unique port design affects airflow in your engine's throttle body, by eliminating this low pressure area, and speeding up the introduction of air in to your intake manifold. Ultimately this improves your engine's performance and fuel efficiency. Although we still offer our original "Smooth Bore", and "Wide Open" plenum MPFI spacers, our exclusive Torque-Curve design spacers far surpass all other spacers in both performance and popularity.

 

According to the data put out and by past on hands usage it surpasses your stock spark capabilities increasing them from 6 deg off the crank rotation of spark to 20 to 22 deg of off the crank resulting n a cleaner and longer burn of fuel thus causing more horsepower and torque. this is some of MSD's info:

Spark Energy:
105-115 mJ per spark
Primary Voltage:
450-480 Volts
Secondary Voltage:
45,000 Volts
Spark Series Duration:
20 degree Crankshaft Rotation
RPM Range:
15,000 RPM with 14.4 Volts
Voltage Required:
12-18 Volts, Negative Ground
Current Draw:
1 Amp per 1,000 RPM
Weight and Size
3 lbs.,8"L x 4"W x 2.25"H



There is a coil you can purchase for this set up, but the hold back is you have to modify you existing plug for you stock coil to make it fit you rig. i had a local dodge mech do mine once I purchased the coil. I have a real problem with jury rigging something so I let the professionals take care of it.

Coil Specs
Turns ratio:
70:1
Primary resistance:
1.2 OHMs
Secondary resistance:
13.7K OHMs
Inductance:
3.9mH
Maximum voltage:
40,000


So if you combine your coil/box voltage that 85,000 to the plugs quite a hot burn. If I remember correctly the stock coil is 35k, not sure on that one.

I have noticed a big difference in mid RPM band from about 2000 to 4500 on a hard acceleration and when towing something from a dead still you can tell it made a difference. But other than that, the gas mileage still sucks just have more ability to burn all of that expensive fuel, instead of the catalytic converter getting all the fun.

Don't beat me up over this if I miss quote something.

Hope this helped.

 

Well, came across this old thread.

1. I have quick connects so I can disconnect the box and return to my stock setup as fast as I can disconnect 4 connectors and reinstall them (In case of box failure). I noticed that my truck took about 2-3 turns to startup with the box connected. Without the box connected, I just needed to bump the starter. Makes you think you have a fuel leakdown problem.

2. About using the MSD coil on a 2000-01. If you owned a 1996, like me, you just cut off the coil wire plug (Which fits) and splice in the earlier year coil plug. Same color ignition wires and everything. I have it connected by quick connects. Or you can go to a junkyard and completely ruin a perfectly good engine wiring harness (I did that as well). The junkyard did not even charge me. They said it was "junk"...which is ironic.