Circle Track digs deep into the state of the art in ignition technology to help you get the most consistent spark in your race car.
From the July, 2012 issue of Circle Track
By Jeff Huneycutt
Photography by Jeff Huneycutt
For most of us at least, when it comes to ignition systems, as long as we are getting spark in all eight cylinders and the engine
isn’t popping and missing, we’re usually pretty happy. Maybe we’ll hook up a timing light every now and then just to make sure the engine timing is still at least close where the engine builder said to put it, but that is probably about it. Read more
Spent yesterday afternoon getting Project Sublime ready for the move to the new shop. I wish I could drive it there, but I am happy to just have it on all four wheels again. One thing I forgot was how much the green pops in the sunlight.
Delphi’s Ionization Current Sensing Ignition Subsystem (Ion Sense) is a technology based on the principle that electrical current flow in an ionized gas (e.g. during combustion) is proportional to the flame electrical conductivity. By placing a direct current bias on the spark plug electrodes, the conductivity can be measured.
Delphi’s Ion Sense Subsystem consists of one ignition coil per cylinder and high-temperature-resistant electronics. Moving parts and high-voltage leads are eliminated to help provide maximum energy supply to the spark plug. In this design, the spark plug not only ignites the air/fuel mixture but also acts as an in-cylinder sensor to monitor the combustion process. The resulting Ion Sense signal contains combustion information. Processing of the signal allows it to be used for engine control features that require knowledge of combustion characteristics. Read more
I wasn’t even aware this was a thing.
A scientific study released by ARCADIS, an international research firm specializing in environment issues, found no evidence that laundered reusable shop towels pose any health risk to workers, refuting claims by the disposables industry. The study refutes previously published reports by the disposables industry used to frighten workers who use shop towels to perform their jobs, claiming that residues imbedded in laundered reusable shop towels pose a health risk despite decades of use without any reported issues. Read more
Before or after an overhaul, 2003 and newer Lincoln LS vehicles equipped with the 5R55S transmission may exhibit a complaint of harsh engagements and/or harsh up-shifts (especially the 1-2), with no codes stored in the PCM. This complaint will typically come into ATSG’s technical hot line as the reason the vehicle came to the shop in the first place. During overhaul the solenoid assembly was replaced and at times a complete valve body yet the problem remained.
The cause may be a PCM that is incorrectly controlling solenoids producing high main line pressure. This style transmission has three pressure control solenoids with which to control shift feel. Pressure Control Solenoids A, B and C otherwise referred to as PCS A, PCS B and PCS C.