hey thats wierd. they moved the a/c compressor back over to the drivers side again. in my 86 it is the same place as yours but on the 91 it is on the pass side. wierd.Rhino said:
Here's mine, now granted it's just the 6A.. but still.. you get the idea...
Amazing times huh?....all because you used a MSD 6ALi bought mine forever ago(full price)... i have msd 6al, blaster 2 coil, and harness. i need to find a msd dizzy for computer controlled cars. the major thing i noticed about it was 3000+ rpms. i could run it and pull amazing times at the strip... then i could unplug it and it got slow all of a sudden... but that was on my built 4.3... i have a stock 305 now...
You don't understand...an MSD box only does it's "MULTIPLE SPARK" thing below 3K RPM after that it's the same as an HEInah dude, the msd brought out the best in that motor... It wasn't that it caused the times, so to speak, it just made the truck pull ALOT harder afted 3k... That makes a big difference
On an normal (average) car, there's only one spark ignition. MSD takes that one step farther and lights off few sparks per burn stroke. So the theory is that it will give you cleaner and more powerful burn.
That is the theory. But in practice it has not really been proven that it makes a significant difference (in power and MPG). The reason is that once the spark is ignited all the gas around it is already exhausted and buring AWAY from the spark. So the second and subsequent spark really does not much.
Also modern cars run at peak efficiency (stoichiometry) of 14.7 fuel to air ratio. It is already drawing the most energy out of the fuel it can. The only way to really get it burn any better it to let in more air (leaner), but that would make the cylinders dangerously hot (meltdown). MSD does nothing here.
So in reality there only so much that can be done to burn the existing fuel more efficiently.
Most of the testimony are from non-scientific testing source (your brother and my cousins, etc.). The exceptions are the top drag racers where even 1 or 2 percent could mean the difference between winning and losing.
but also it fires a stronger single spark above 3K RPM too, but yet I have to agree with everyone else. It doesn't do much good on stock motors unless it specifically needs a stronger than stock ignition, at least in what i've seen. I had one on my carbd '85 2.8 didn't notice a difference and later it played hell with it because the GM harness they sell for it doesn't work for the vacuum advance distributors on my motor. had to jury rig it half with the gm harness and half with the mag pickup, which the wires started working loose since i only taped them together so i got bad backfires and stalls until i removed it. on my 1/2 ton with the chevy 350 carb setup i noticed it fired up a little easier but again not much performance beyond that. the stronger spark i suspect would work well in forced induction though, but i don't have any of my running cars turboed yetYou don't understand...an MSD box only does it's "MULTIPLE SPARK" thing below 3K RPM after that it's the same as an HEI
Here's a good description...