Low speed miss, Ignition? Options

[Allan]

I just spent yesterday swapping out a set of 46mm carbs for a set of more streetable 40's. One of the problems I had before the swap was a low speed miss. Once it is at 1/3 to wot it is nice and smooth and pulls really hard. One thing I do know is that the motor has what looks like all original plug wires. The metal shielded oem kind. I'm going to replace all the plug/coil wires as well as replace the points, condenser and distributor cap this week.

I guess my question is, could one or more of the above mentioned items cause this symptom?

Tx again...

[J P Stein]

QUOTE (messix @ Dec 18 2005, 08:37 PM)

plug gaps great than .35-.40 will over heat the coil by having to build to hi of voltage to arc the gap. racing coils can do that but only for short periods or are built purposely for such use [very spendy]. check plug wires with a VOM on the ohm setting and compare to each other. you'll probly find one that reads very high. 5 ohm is close to a short. 5m [mega] ohm has some some resistance, 5k [kilo] is very high resistance. i hope this can help. plug wires are cheap and easy.

Don't forget your .0, guys. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

MSD ignition units & coils are are designed to run with these gaps. They also give a multi spark discharge under 3K rpm. They draw about 9 amps directly off the battery.
The coil is under 40 bucks. The Magnecore wires are not cheep at around 130 bucks.....which is less than a set of Berus (sp?) The wires need to carry about 40k volts
so this is not an area to skimp.

Summit Racing has the best prices I've found for the MSD stuff. I've been running this set-up for about 4 years with no failures.....if that means anything.