Starting the TB sync and A/F mix tune.
Just in preparation, I've been looking through various resources for this process. I did the process according to forum advice in the past.
LT manual V3 has one extra step that I do not understand. It states to wind the balance screw a full turn in, reset the TPS, wind the same screw until TPS is double the baseline value of 3.2. Then reset the TPS and wind out the screw one full turn.
I'm not quite getting it. I've used Brad's procedure with success as well as the procedure in the service manual. Never a mention of producing a double baseline TPS value on the active VDSTS gauges.
If the LT steps don't make sense, it would be dissapointing. The rest of the book is awesome.
i need to get that book.
i just performed the TB sync. or what i think is the TB Sync ( since there are no real guides i was kinda just piecing together concepts from just how TB works... so i THINK i did it right.... lol)
i heard you dont need to do reset the TPS if you havent messed with its change in position so i wasnt going to bother with it.
Brad's method worked fine for my DS a few months ago.
LT has not replied to my email query sent yesterday about the procedure.
I am hoping to hear back from LT, because I felt like I understood the procedure, but LT's book makes me think otherwise.
I mean...they are throttle boddies not goniometers...this should be somewhat staightforward.
He-man, did you use a tube section manometer? Did you do a tune or just balance?
LT's balancing procedure is similar to all others I have read...it's just the TPS reset that is different.
I Used carb sticks that someone here loaned me.
this is basically what i did, from what i read...
- warmed the bike up
-close out the adjuster bolts on the TB which were already closed)
- took off the access bolt on the intake manifold that connects the tb to the head.
- closed out the adjuster bolt on the TB (which was already completely shut)
-fired the bike up
-adjusted the bolts until the carb sticks were even
-called it a day.
not sure if thats correct.
I think that is one way to get a better balance, but without setting the baseline by adjusting the balance screw between the TB's with both bleed screws shut, it could be off. Especially if a midpipe got added as this can change the balance a bit.
Brad's procedure here yielded the best reults for me:
http://www.ducatimonsterforum.org/index.php?topic=53431.0 (http://www.ducatimonsterforum.org/index.php?topic=53431.0)
thats the thread ive been reading for a while.
without resetting the TPS and using a gas analyzer, i can only do part of it.
to my understanding, the S2R1k doesnt have an idle adjuster screw. the idle is controlled by the stepper.
What i dont understand was why the TB sync scews were already fully closed from the factory ( ive enver touched them in the whole 32k my bike has seen). right now, my right side TB has 2 full turns over the left side. the left side is fully closed.
Whoa, thats different bleed settings than my bike. The DS does have a balance screw between the TB'S, I take my oil coooler down to get at it. I have 1/2 turn open on the vert, closed on horiz. I wonder why it differs...tiny seating differences in the valves and piston rings seal...tiny air leaks on the intakes...compression stroke differneces betwen cylinders...?? All deep dark engine talk. As far as I know, accept the difference, correct for baseline vacuum with the balance screw and adjust for mix with the bleeds and reset the baseline if your bleeds are needing huge differences. On our DS, with the hellish aweful *]â,¬\?|£~+~â,¬|â,¬\â,¬|â,¬|!| sncmcjsjâ,¬{â,¬|â,¬ make the beast with two backsing stepper motor, big differences in the vacuum can be an issue and cause idle hunting (my opinion). The baseline needs to respect the mix also, so I monitored the CO while doing the manometer reading with idle bleeds closed. It got me close.
Get the VDST from Chris. It's worth it and it works on most 695's as well (not sure if that matters to you). Wait...we're talking about a TB sync... All the messing with the balance and bleed screws really benefits from a TPS reset.
wait, theres a screw between the TBs? thats the balance screw?
so im taking i need to adjust the balance screw to get in the ball park, and then use the individual adjuster screws to fine tune it?
I wish someone had a diagram of which is what. The S2R1000 manual kinda sucks
I like motors and have a few different kinds I run.
Fueling tuning is gypsy magic.
Vacuum is critical, mix is second. Homogenaity is the unifying factor to a well run engine.
Ducs are new to me.
What I used was a Gunson colortune instead of a digital readout.
It worked fine with my wife's eye judgement as a backup.
The digital would be better.
I'm going fishing tomorrow! Updates on Monday!
Quote from: He Man on April 07, 2012, 02:56:25 PM
wait, theres a screw between the TBs? thats the balance screw?
so im taking i need to adjust the balance screw to get in the ball park, and then use the individual adjuster screws to fine tune it?
I wish someone had a diagram of which is what. The S2R1000 manual kinda sucks
http://www.bikeboy.org/ducati2vthrottleb.html (http://www.bikeboy.org/ducati2vthrottleb.html)
second photo, # 6.
as a general rule most of the closed loop bikes have both air bleeds wound full in ex factory.