14/06/2022
Every day I spend hours on the phone or email answering questions from perspective buyers, helping with installation enquiries or issues, diagnosing faults or arranging new orders.
Strangely, yesterday and today I've had enquiries about multiple selectable advance curves, fuel consumption and why WEDGETAIL IGNITION SYSTEMS don't make such a thing.
The answer s simple: the Wedgetail ignition system is tailored in two configurations. 1: for bikes with 2 spark plugs (one per cylinder) and 2: for bikes which have been converted to dual plugging (4 plugs , 2 per cylinder) There ae a number of configurations for the hard ware eg: dual switchable processors, dual switchable trigger units or both.
There are certainly ignition setups on the market that offer different switchable ignition curves... usually this is for ease of production for control units (not mounting hardware) to be fitted to various makes and models of bikes...some manufacturers offer 3 or 4 settings to give the owner some "fiddle room" on a particular bike. For obvious reasons this can't be wide ranging for fear of damage to engines.
When we developed the WEDGETAIL IGNITION we spent many months road testing, hours on dyno's and then thousands and thousands of kilometers establishing the correct curves for the two basic configurations (single and dual plugged cylinder heads).
A little known or mentioned fact is that every Air cooled BMW standard production road bike came from the factory with the SAME camshaft specs regardless of the capacity of the engine or the type...90s, S, RS, CS, ST GS and so on and on.. these camshaft specs were chosen by BMW as the best for the wide range of uses their product would be put to....they gave some bikes bigger valves, different compression ratios bigger carbs, different final drive ratios and so on, but the basic engine architecture and especially the camshaft and ignition system was a standard thing from the /5 to the last type 247 boxer engine made....
YES! there were race cams, fast road cams, specialist cams but by and large....the vast majority of production motorcycles from the /5 on had the standard cam. (which has served them very very well)
Taking that on board we spent the development time matching the ignition timing to the valve timing by varying the "advance commence" revs, "the max advance achieved revs" and of course, the "shape" of the curve itself.
On a BMW Airhead, the amount (or number of degrees) of advance is 26 (on standard single plug bikes) when controlled by electronics instead of worn weights and springs and pivots...this can be programmed to begin at any engine revs and top out at any revs IN A 2000 RPM BAND WIDTH (give or take a couple of hundred RPM)
Unlike most aftermarket systems which use 6 plot points in that band, we use 20. This is coupled with some really excellent soft ware to be (eventually) tailored to match the afore mentioned cam timing (lift and duration) perfectly...or as near to as possible given the wear of pre existing components....modifications and the like.
Because we have done all the work FINDING the sweet spot we don't need "gimmicks" like multiple switching of curves over 2000 rpm bands... we would rather use the space to make a second switchable control unit possible for redundancy.
We at WEDGETAIL make no claims for increased power or for magic milage per litre. We offer unprecedented improvement in the riding experience of your Airhead...easier starting, smoother idle, smooth acceleration, better tractability....no pinging under load...
CONCIEVED, DESIGNED, BUILT IN AUSTRALIA, SOLD AROUND THE WORLD. 2 year no quibble warranty, personal customer assistance and product back up...
We at WEDGETAIL IGNITIONS AUSTRALIA back our product with quality design, components and service against all comers.