by spencerforhire » Fri Sep 09, 2016 8:49 pm
Normally, the coil gets power through the resistance wire(white with a braided cotton cover) which supplies 6-8 volts while running. During crank, the extra wire(usually yellow, attached to a terminal marked "I") on the starter bumps that up to 12 volts. With any kind of electronic ignition upgrade(pertronix, Crane, even a GM HEI), the resistance wire is supposed to be replaced with a proper, full voltage wire. I like to pull the bulkhead connector apart at the firewall and replace the resistance wire with a fresh piece of 14ga. wire. Alternately, a new wire can be run in to under the dash and plugged into a spare ignition spade in the fuse box.
On a Vega, full voltage can also be found at the large pink wire on the oil pressure switch.
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....
Visit http://www.spencerforhire.ca