A as well general means to diagnose and tune-up a modified or racing engine is by looking the glimmer plug firing tips in that its appearance can admit whether your engine has a dispute that entail correcting. Nevertheless you desideratum to be aware that the duplicate spark plug firing tips appearance can include disparate root causes:
A) Mix or timing misadjustment or other imaginable mechanical troubles.
B) Aerial performance modifications that access the horse-power level, augmenting thence the combustion chambers temperature and stress at flying RPM.
C) Colder racing spark plugs fouling at idle, close and go, and lower speeds.
Unfortunately, for everyone spark plug firing gratuity appearance, the traditional spark plug troubleshooting charts apart are considering as practicable dilemma causes the head document A.
But in eminent performance modified engines and racing applications, the folder B is normally the leading determinant of the higher temperatures in the combustion chambers that generates overheating, pre-ignition and detonation; and the file C is the main foundation of fouled spark plugs that generates misfiring, compacted starting, nigrescent smoke and positive loose of power.
In spite of that fact, carefully march past of nearly all the troubleshooting charts, reveals that the causes of the B and C lists are not included, or at least mentioned. But when talking on the high-reaching performance field, these causes are with carry on closeness the main guilty of most of the troublesome spark plug firing tip appearance.
As backwash of this curtailment of information, never was enough free that the undesirable spark plug firing tip might be attributable to an inappropriate spark plugs heat range. Either never was mentioned strongly sufficiently the transcendent concern that posses to customize the spark plugs heat range, so it was never taken into account.
Forasmuch it should not suprise that much experienced engine builders, modifiers and tuners generally confuse an overheated spark plug caused by the contemporary calm of dynamism at formidable RPM, with a bony compound trouble, since the appearances of its firing tip double o prerrogative the same; creation error diagnostics, and enriching the mixture, instead of customize the heat reach to the engine’s power.
And worst, when the heat excess alike provokes pre-ignition or detonation (which is besides frequent due to the elevated levels of demands that the racing engines are submitted) most of the times the traditional troubleshooting charts are guiding them erroneously to presume that their engines are having some mechanical troubles and ergo they are engaging unnecessarily in repair nonexistent mechanical problems, liking cooling manner failure: or to suppose that it is owed to a alloy or timing misadjustment, consequently enriching the concoction and/or retarding the ignition timing, arriving inclusive to section the boost pressure, the nitrous flow, the compression ratio, etc. losing by this bag tons of power, instead of the singular right, simplest, fastest and cheapest notion that is to customizing the spark plug heat compass to the vast power, stress and heat achieved at great RPM.
Due to the equivalent absence of information, they can not either distinguish when the bloodless racing spark plugs are fouling at idle, brick wall and go, and lower speeds, from when has a gilded mixture, for both hog the alike carbon fouled firing tips appearance; and what is yet worst, they can not either distinguish when the colder racing spark plugs for heavily modified engines are fouling at idle, control and go, and lower speeds, from when the engines has worn-out piston rings and cylinders, thanks to both carry the identical oil fouled firing tips appearance.
Those false diagnostics are important them to bum solutions: trying to adjust unnecessarily the air-fuel assortment when they espy carbon fouled spark plugs, and existence bottled without obligation in overhauling the engine to repair mechanical troubles that achieve not exist, when they contemplate oil fouled spark plugs, instead of avoiding sluggish and lower speeds in engines built for drop at hovering RPM, or to customize the spark plug heat radius for these type of flash off usage.
Also when the traditional spark plug troubleshooting charts mention “wrong heat range” or “check for the fair heat range”, being it is not enough clear, a extravagant majority of they are entirely familiarized with the intellection that “wrong heat range” sole could be a spark plug colorful than the inventory or the suggested by the manufacturers, ignoring that they should switch the spark plug’s heat range. And, as provided was not sufficient with this confusion with the information, until mere short clock did not exist fashion neither stuff to perform the decisive charge of customize the heat gamut of the sparkplug, according to any particular giant performance alteration level, so, the choice of the aftermarket sparkplug that choicest works at any RPM load or stress, was left to the intuition, knowledge and the guideline of each technician, who single had the unfriendly guesswork of never-ending check and mistake proofs, testing contrary spark plug sets, with inexact and dicy results.
But the racing nature is no berth for mistakes.
Is for that intellect that the traditional troubleshooting charts are not the most comprehensive escort to properly and accurately diagnosing your expensive grand performance modified or racing engine, risking you to lose your engine and that is all the more worse, to lose the race.
What is then the good journey to genuine diagnose the spark plugs in the colossal performance field? Be firm that, if you are not having absolute mechanic problems, you must research the heat area of the installed spark plugs, and receive the replacement with the colder heat span finer suited to your genuine big performance adjustment level.
Is it a callous work? It depends. If you are using the condign tool, that allows you to see, confirm, verify, select, and choose the exact heat scope you must install in your gigantic performance modified engine, it is a lot of cake!
Of plan if not….. it could be unending, unfriendly, blind and risky guesswork.