i have read about tha highly acclaimed msd ignitions. i was searchin throught posts and to my understanding tha ignition is a tfi...and tha box does a good job stock, so i was wondering (for now) if i would purchase a msd tfi coil, and wires w/ plugs..will this make a difference or do i need tha box as well (dont really have tha money soi was just gunna get tha coil then tha box in a month or so)

also i would like to know what gains i would get if i block tha egr off, tha reason im askin about these realitivly cheap mods is cuz i jus got a new set of 31" bfg all terrains and lost some power and speed.. is there ne other mods i can do thas pretty cheap???

 

The msd box and coil is a nice setup. I did mine a couple of months ago. It can get spendy though. You'd probably get a better return on performance bumping up the rear end ratio. The box makes the difference, that's what provides the multiple spark discharge.

 

Petersons 4wheel and Offroad did a writeup on ignition systems about a year ago. Here's what they found (Mods: if this isn't kosher delete it asap and shoot me off an email):

Test mule: 1973 GMC Jimmy, 53k mile 350 Quadrajet, oldschool Edelbrock Torquer intake and an Accel 71000 Electronic Distributor. Timing was set to factory 12 degrees BTDS. Each box was run 6 times from 20 to 95 mph (2400 to 4700RPM) in second gear. The six pulls were averaged for their final score, but they don't show each run (just the average).

Fire Starter:
Baseline
Box Features:
accel 71000 series electronic distributor used for baseline
Our Notes:
Big Improvement over stock points-type distributor
Allwed for consistency in testing of capacitive discharge boxes
Seat of the Pants:
Average
Max Power:
156.4hp
Cost:
Free


Fire Starter:
Mallory's Hy Fire VIA
Box Features:
125 milliamps secondary current output
520-volt primary output
Digital ignition
18-16 volt operating range
No internal rev limiter
Our Notes:
Small, compact design
No weather-pack connectors
Smaller-than-average gauge wires
Unpotted circuitry
Seat of the Pants:
Similar to MSD
Max Power:
155.8hp
Cost:
$169.95


Fire Starter:
MSD's 6-Off-Road-Box
Box Features:
105-115 millijoules at 460-480 volts
Water and vibration proof housing
Uses weather-pack connectors
12-18 volt operating range
No internal rev limiter
Analog ignition
Our Notes:
Works will all MSD accessories - modular construction
Proven MSD reputation
Black anodized aluminum housing
Industry benchmark
Seat of the Pants:
Similar to Mallory
Max Power:
154.1hp
Cost:
$212.95


Fire Starter:
Holley's Annihilator
Box Features:
135 millijoules at 525 volts
High-performance capacitive discharge
1000 to 9900 rev limiter set with rotary switches
Microprocessor-controlled
Compatible with any 12-,16-,18-, or 24-volt negative ground system
Our Notes:
No noticeable acceleration increase
Smoother idle
Easier starting
Uses weather-pack connectors
Aluminum/stainless steel construction
Seat of the Pants:
Sluggish response
Max Power:
151.3hp
Cost:
$165.95


Fire Starter:
Crane's Fireball HI6R
Box Features:
1200 millijoules/sequence at 450 volts
Fully digital capacitive discharge ignition
600-9900 rpm sequential rev limiter set with rotary switches
Dirt and mousture resistant
0-20 degree adjustable spark retard control
6-18 volts, reverse polarity protected, negative ground
Our Notes:
Noticeable acceleration increase
More power above 4500rpm
Fully modular system
Uses weather-pack connectors
Seat of the Pants:
Quick throttle response and pulls strong at all rpm
Max Power:
157.6hp
Cost:
$249.95


-=Whittey=-

P.S. The text isn't verbatim, but the data is.

 

I've got an MSD6a ignition going on ebay in today tomorrow or saturday.


Primary rig is:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Sunroof, and some 32" BFG Muds .

Pictures are in!!


Then theres:
99' Mustang GT 4.6L
88' F-250 Superduty 4x4 351/c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 with a
3 spd column shifter. Top speed is 65mph, Go Baby Go!