The Yo-Yo Chronicles
#426
#427
okeeton said:
regarding ryephix #1is there a down side to leaving the "the plastic linkage from the vacuum actuator" attached and just zip tying it in place? or is this a must remove from the butterfly arm lever...?
regarding ryephix #1is there a down side to leaving the "the plastic linkage from the vacuum actuator" attached and just zip tying it in place? or is this a must remove from the butterfly arm lever...?
Timeline: MINIUSA should be releasing V38 in about one week.
#429
I had V.37 installed on my car today at Rasmussen in Portland. Before making an appointment, I asked Ann, the SA, how many cars they had installed 37 on and how many of those had yo-yo. She reported that they had put 37 on half a dozen or so cars and that they all had yo-yo. Since having the software installed, I have driven about sixty miles. There is a definite difference in the way the car runs - noticeably smooooooother. So far, I have not been able the get it to yo-yo. Just smooth acceleration through my previous yo-yo range of 3000-4000 RPM. Finger crossed and smiling.
JustGo4It, update information for your yo-yo list ..... my car is an '04 MCS built 10/03 vin TD76906
JustGo4It, update information for your yo-yo list ..... my car is an '04 MCS built 10/03 vin TD76906
#430
>>
>>No, leaving the linkage attached shouldn't cause any damage. I removed it to keep the tension off the zip-tie, to ensure the valve stays 100% shut at all times. As long as your zip-tie is sturdy enough, you shouldn't have any problems.
>>
>>Timeline: MINIUSA should be releasing V38 in about one week.
Will be checking with the local service center soon for v.38 as I'm creepin up on the 10000 mile mark and am due for a visit...
Hopefully your Fix will lbe in v38 and they should kick down something to recognize all the effort for you've put into making the yo-yo go bye-bye for the Cooper S community. As I found myself not even thinking about the yo-yo with RyePhix #1 in place!
thanks again Ryan you rock!
-okeetpn
okeeton said:
>>regarding ryephix #1is there a down side to leaving the "the plastic linkage from the vacuum actuator" attached and just zip tying it in place? or is this a must remove from the butterfly arm lever...?
>>regarding ryephix #1is there a down side to leaving the "the plastic linkage from the vacuum actuator" attached and just zip tying it in place? or is this a must remove from the butterfly arm lever...?
>>
>>Timeline: MINIUSA should be releasing V38 in about one week.
Will be checking with the local service center soon for v.38 as I'm creepin up on the 10000 mile mark and am due for a visit...
Hopefully your Fix will lbe in v38 and they should kick down something to recognize all the effort for you've put into making the yo-yo go bye-bye for the Cooper S community. As I found myself not even thinking about the yo-yo with RyePhix #1 in place!
thanks again Ryan you rock!
-okeetpn
#431
Had V37 installed last week. Had a very strong Yo-yo before. I still have it, but it has moved down the RPM band from around 2900 to just above 2000; this is making in-town driving a pain in the A$$. The MINI now also has a hard snapping transition from on throttle to off throttle.
I'm getting to the point that if V.38 doesn't fix this, I'm getting out...My MINI is my daily driver and has always had a strong yo-yo, it's getting to the point that I don't enjoy driving it with these characteristics.
I'm getting to the point that if V.38 doesn't fix this, I'm getting out...My MINI is my daily driver and has always had a strong yo-yo, it's getting to the point that I don't enjoy driving it with these characteristics.
#432
I had V37 downloaded yesterday at Northwest MINI in Tacoma and, while it's still early, the car accelerates much more smoothly now, doesn't hesitate off the line the way it used to, and no longer stutters/flirts with stalling whilst backing out of a parking space, etc. when cold. Thumbs up.
#437
#439
6th Gear
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#440
OK Fellow YoYoers,
Tomorrow is the big day; the end of April! Version 38 should be sailing through the net into your dealers computer systems. Time for everybody to call and find out the availability.
After all, MINI did say the end of April didn't they? I really wasn't paying attention 'cause I was buying this bridge in Manhattan and.....
Theo
Tomorrow is the big day; the end of April! Version 38 should be sailing through the net into your dealers computer systems. Time for everybody to call and find out the availability.
After all, MINI did say the end of April didn't they? I really wasn't paying attention 'cause I was buying this bridge in Manhattan and.....
Theo
#441
i have a relatively new MCS and haven't noticed the yo-yo yet.
but now that i've read all fo these posts i'm probably going to go crazy looking for it and try ng to reproduce it in my car.
i generally accelerate through 2k- 3k rpm at more than 30% throttle so i may not have noticed it. :smile:
i'll post tomorrow and may have to add my name to the list if i have the dreaded yo-yo
but now that i've read all fo these posts i'm probably going to go crazy looking for it and try ng to reproduce it in my car.
i generally accelerate through 2k- 3k rpm at more than 30% throttle so i may not have noticed it. :smile:
i'll post tomorrow and may have to add my name to the list if i have the dreaded yo-yo
#442
#443
>>so the verdict is no yo-yo.
>>
>>however, my saab9-5 wagon does yo-yo during easy acceleration just as you are describing in the forums. i'm going to try some of the things that Ryan has suggested in his posts.
I find this very interesting. I too am seeing the yoyo effect; not in a MCS or a even a SAAB, but in my interstellar space crusier. Once this fix is done, I will probably fix that yoyo in my bicycle and I am pretty sure my toaster has started showing signs of the yoyo as well.
Cheers!
_________________
MCS -- BRG/B, MFSW, sunroof, leatherette, heated seats, DSC, fog lamps, 16" v spoke, JCW, OneClick
>>
>>however, my saab9-5 wagon does yo-yo during easy acceleration just as you are describing in the forums. i'm going to try some of the things that Ryan has suggested in his posts.
I find this very interesting. I too am seeing the yoyo effect; not in a MCS or a even a SAAB, but in my interstellar space crusier. Once this fix is done, I will probably fix that yoyo in my bicycle and I am pretty sure my toaster has started showing signs of the yoyo as well.
Cheers!
_________________
MCS -- BRG/B, MFSW, sunroof, leatherette, heated seats, DSC, fog lamps, 16" v spoke, JCW, OneClick
#444
>...disconnected the vacuum pump linkage from the bypass valve, and then zip-tied the linkage such that the butterfly is permanently closed...No Yo-Yo!...nothing but smooth...acceleration...
Ryephile,
If locking the valve shut is solving the yo-yo/improving acceleration, can you see a reason not to just remove the bypass valve altogether (aside from fuel economy)?
Ryephile,
If locking the valve shut is solving the yo-yo/improving acceleration, can you see a reason not to just remove the bypass valve altogether (aside from fuel economy)?
#445
Following the thread with interest. '04 MCS with 1200 miles, yo-yo present, TD85657.
I'm concerned about the effectiveness of a software fix that attempts to correct what appears to be an underdamped mechanical feedback system. The two mods so far, Rhyfix #1 and #2, implement changes to the operating point of the bypass valve; in one case eliminating its operation, in the other by changing the pressure at which it begins to operate. Has anyone tried increasing the system damping by adding a restriction orifice (and possibly a vacuum chamber) to the pressure source for the bypass valve actuating diaphram? Properly adjusted this would dampen the oscillation but would still provide a reasonable value response time, while maintaing the designed point of operation (in theory anyway). My MCS is a little too fresh for me to attempt mods at this point. The yo-yo is quite annoying though.
I'm concerned about the effectiveness of a software fix that attempts to correct what appears to be an underdamped mechanical feedback system. The two mods so far, Rhyfix #1 and #2, implement changes to the operating point of the bypass valve; in one case eliminating its operation, in the other by changing the pressure at which it begins to operate. Has anyone tried increasing the system damping by adding a restriction orifice (and possibly a vacuum chamber) to the pressure source for the bypass valve actuating diaphram? Properly adjusted this would dampen the oscillation but would still provide a reasonable value response time, while maintaing the designed point of operation (in theory anyway). My MCS is a little too fresh for me to attempt mods at this point. The yo-yo is quite annoying though.
#448
#449
Bradley99 wrote:
That's a good idea. I don't seem to have the yo-yo, but when I installed my boost gauge, it rattled under boost. I installed a small fuel filter in-line between the boost tap and the gauge. It damped the pulses nicely.
Has anyone tried increasing the system damping by adding a restriction orifice (and possibly a vacuum chamber) to the pressure source for the bypass valve actuating diaphram? Properly adjusted this would dampen the oscillation but would still provide a reasonable value response time, while maintaing the designed point of operation (in theory anyway).
#450
THE UPDATE
MINIUSA has leaked that V38 is completed! However (yea yea, here's the "but", the software won't get to dealerships until first thing June. MINI has allowed an accomodation to have me send them my ECU and have it reflashed prior to the dealership release, so I can forward to you if it really works.
Cheers,
Ryan
MINIUSA has leaked that V38 is completed! However (yea yea, here's the "but", the software won't get to dealerships until first thing June. MINI has allowed an accomodation to have me send them my ECU and have it reflashed prior to the dealership release, so I can forward to you if it really works.
Cheers,
Ryan