| Author |
Message |
    
44mag2
| | Posted on Saturday, January 20, 2007 - 12:07 am: | 
|
Murrae,
You have got some mail.
Steve |
L_je
| | Posted on Saturday, January 20, 2007 - 12:03 pm: |
|
Murrae, thanks! I sent you my info!
Hi, my name is J, and I have a pinger.
I usually add 3-6oz of octane booster per tank of 93(R+M)/2 gas. Under hard acceleration, my bike will sometimes ping.
If it does ping, then, like clockwork, my fan will engage within a minute or two. From the fan hysteresis (on at 428F, off at 356F), I'm guessing that my bike pings when the rear cylinder is somewhere above 420F.
After the fan has had a chance to run for a couple of minutes, the ping doesn't come back.
This morning, I filled up with 93 octane gas, but DIDN'T add any additive; it was 33F outside. My bike pinged under spirited acceleration, and did so a couple of times; however, the rear cylinder never got hot enough to engage my fan, which normally eliminates any chance of ping.
So, after much internal debate, I finally had to admit that I have a ping problem. |
Snowscum
| | Posted on Saturday, January 20, 2007 - 01:45 pm: |
|
I had a ping problem before they did the intake seals but its been cool out since then. That was back in September sometime.
I might have to wait till it gets back into the 80's here which will be in 5 months.
Not sure if I should be added yet. |
Alatriste
| | Posted on Saturday, January 20, 2007 - 03:02 pm: |
|
Murrae Thanks very much, I sent my info, the communication with the dealer in Spain is almost impossible, what a pity.
Thanks again - Saludos |
Davo
| | Posted on Saturday, January 20, 2007 - 04:02 pm: |
|
Murrae,
These bikes that clean up after adding boost to 93 octane clearly have the same problem as I do. I know that the factory fix will be expensive if it requires head work so I will add my $0.02 worth, If the factory would create a map that would work with the increased compression it would seem this would be a better solution. Reduce the curve at the mid and top end by 8 degrees and leave the low end, 1500 and less, alone and the problem will go away. Until then I recommend that you retard until the ping goes away.
(Message edited by davo on January 20, 2007)
(Message edited by davo on January 20, 2007) |
44mag2
| | Posted on Monday, January 22, 2007 - 01:38 am: |
|
In addition to sending your info to Murrae, everybody with a ping problem should contact Buell customer service and tell them about it. The number is in the front part of your manual.
This is the only way to get Buell to issue recall or publish a factory approved fix.
They have proven that they will work with us to solve the problem. |
Davo
| | Posted on Thursday, January 25, 2007 - 06:06 pm: |
|
44mag2,
Do you know if you got new heads or did they clean the carbon out of the original heads? I wonder if they cc'd the heads? |
Blake
| | Posted on Monday, February 19, 2007 - 11:06 am: |
|
Steve 44mag2,
In case you didn't see my comments on the board...
RE: http://www.badweatherbikers.com/buell/messages/142 838/258474.html
and
http://www.badweatherbikers.com/buell/messages/142 838/228407.html
Where you stated more specifically that...
"The compression was measured at 170. The spec in the Uly manual is 120. This would cause the pinging. "
You may have been misinformed or possibly misunderstood your mechanic.
The compression spec, verbatim from the service manual, for your Uly engine is as follows:
"Compression is normal if final readings are 120 psi or more."
A reading of 120 psi would be at the extreme low end of allowable compression and would indicate a compression ratio of around 8.2:1. Nominal compression for the 10:1 compression ratio Buell engine should be around 150 psi. A reading of 170 psi is not problematic.
Given the limited information, it seems likely to me that excessive oil in the combustion chamber resulting in carbon deposits which created hot-spots would seem to be the most likely root cause of the pinging issue in this case. So oil in the combustion chamber is the root cause, not elevated out of spec compression.
For instance, my Buell Cyclone tests at 180 psi compression; it does not ping, not even on the hottest of Summer days in Texas.
Interesting discussion. 
It might be helpful if you could have your dealership contact Buell customer service to document this issue.
Would you please clarify who rebuilt your engine? It was your dealership, correct?
Thanks,
Blake |
44mag2
| | Posted on Friday, February 23, 2007 - 05:36 pm: |
|
Blake,
The Dealer told me that 170 and 180 was too high ...they were working with Buell, whom I assumed was apprised of the measurements.
SInce your buell has a 180 compression reading, and it does not ping, I was wondering if the break in procedure published for the 2006 Uly messed up the seating of the rings, which caused the oil consumption and subsequently the carbon and the ping. I wonder if the new break in procedure for 2007's, which is much more aggressive, will remedy the situation.
The dealership rebuilt the engine, per the instructions of Buell. |
Richard_c
| | Posted on Friday, February 23, 2007 - 07:54 pm: |
|
I've got a new 07, with approx 250 miles on it. It's pinged ever since I've had it and the fan does run a lot. I just assumed that it was the muffler making tin can like noises. It's very hard to tell, where it's coming from. What is the chance the exhaust clinging is throwing us off, thinking that it's pinging? |
Blake
| | Posted on Saturday, February 24, 2007 - 05:29 pm: |
|
Steve,
"...they were working with Buell, whom I assumed was apprised of the measurements."
I'm skeptical of that assumption.
Richard,
I doubt you are hearing pinging due to detonation in the engine, especially if you imagined it was emanating from the muffler. |
Richard_c
| | Posted on Sunday, February 25, 2007 - 03:31 am: |
|
I hope your right! I had the dealer change the plugs before I brought it home. It was missing when I test rode the bike. The dealer thought the plugs were fouled due to someone reving up the engine before it was warmed up. I still do get an occasional miss fire but nothing consistant. Other than that, the bike runs great. |
|
