Timing change....Do it!


Marthy

World Most Bad A$$ 6R
Elite Member

sti491

Member
Offsetting the trigger wheel offset everything... timing and injectors. Unless you told the ECU you moved the trigger wheel LOL
Alright Martin, this deserves more in depth dialog... Let's see if I know what I think I know, or you can school me some more... which you have been very generous doing already!

I'm thinking you are referring to my comment about feeling the timing change more in 3rd, compared to 1st & 2nd(?)... or is it mileage? Let me know what you think of this reasoning:

The two timing guys , Rumpeg and Final Impact I think they were that I relied on as well as you, mentioned the ECU retards the spark in first & second, no matter where you advance the trigger wheel. I thought I still felt it in 1st & 2nd, but opposite from front sprocket that affects all gears, that change seemed to pack the biggest wallop in 1st & 2nd because of the more pronounced wheelie inclination now compared to before. I thought I felt the timing change more in 3rd, or was that psychologically induced because of what I read? The ol' butt dyno can be fooled sometimes!

You really got me thinking about, " the trigger wheel offsets injectors". I did not think this was the case. I thought the trigger change I made was akin to turning the distributor on an old school carbureted car: advance the base timing a bit by twisting it clockwise, idle increases, to a point you get a bit more power, past that pinging. The fuel being metered by the carburetor doesn't change, the spark just happens a fraction earlier for more complete combustion, hence a tad better performance (to a point) and slightly better mileage.

Really old school mechanical distributor motors I remember back when I as teenager, didn't even have any type of advance for higher RPM's other than centrifugal weights with springs that required changing sometimes, or stiffer/looser depending the performance you wanted. But none of this affected fuel delivery, just spark timing.

How does advancing the trigger wheel on the FZ6R change the injector timing? I'm confused on the advantage if the injectors and timing both change at the same time, earlier spark & fuel in the compression stroke = bigger bang??? As opposed to earlier spark same fuel more complete burn? My head is starting to hurt. I need enlightening on this please!
 

Marthy

World Most Bad A$$ 6R
Elite Member

sti491

Member
Interesting, Thanks!

Ever hear of this company? https://ecunleashed.com/product/2010-yamaha-fz6-r-2/

Not cheap. Wonder how well they do changing fuel & ignition? Being already invested in an PC5 and happy with Adv Gear Rev B map, doesn't seem practical for me(?) Wonder what the deal is with this, few seem to be doing it and talking about it?


The ECU used the trigger wheel (crank position sensor) to know when to spark and inject fuel, not like the good old carbs day where you only worry about a distributor to adjust spark timing. The spark advance here is what really counts. The injectors are open about 75% of the time at max load at 12K RPM so +/- 2 or 3 degree won't be a big deal. If there was an ECU flash for the FZ6R it wound be so much better but for a $0.00 mod the return on investment is really good LOL
 

Marthy

World Most Bad A$$ 6R
Elite Member

sti491

Member
Cool, thx.
 

San_Holo

New Member
Hey, bought a 4degree timing wheel for my bike of of ebay, and i have now dynoed it. it made 71.1 whp and 50,5nm of tourqe, vs stock 61,2whp (before 4 degree timing wheel). i only have an exhaust, no juice box or anything. This is an easy 10whp gain, i higly reccomend it. Doing larger intake (of of the FZ6, 32mm to 36mm) and ecu tuning next :D Link to the 4 degree timing wheel, https://www.ebay.com/itm/153461413061?ViewItem=&item=153461413061
 

mjv21

New Member
Hey, bought a 4degree timing wheel for my bike of of ebay, and i have now dynoed it. it made 71.1 whp and 50,5nm of tourqe, vs stock 61,2whp (before 4 degree timing wheel). i only have an exhaust, no juice box or anything. This is an easy 10whp gain, i higly reccomend it. Doing larger intake (of of the FZ6, 32mm to 36mm) and ecu tuning next :D Link to the 4 degree timing wheel, https://www.ebay.com/itm/153461413061?ViewItem=&item=153461413061
Did you just buy this or did you do everything with the micrometer as well?
 



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