Spaceclam
Cruisin' Guzzisti
So i had a thread on the WG forums, which was posted because of the volume of replies/people. However, it seems that it's run out of steam a little bit. Im looking for suggestions. It has been brought to my attention that all the modern bikes ping a little bit, but i run into many people riding modern carc guzzis who have never had theirs ping, even with stock fueling.
My bike is an 07 griso, but it seems that any information here would apply to any of the modern 2v mills.
The valves are good, the TBs are good, the TPS is good, octane booster doesnt help, no matter how much is used. It's not a lean condition, as the fueling has been corrected. Bedding the temp sensor in thermal mastic doesnt help. Cooler plugs make no difference. Gas brand doesnt make any difference either.
The bike starts fine, and runs great except when it pings. When it does, it's ALWAYS between 4 and 5k rpm, under high loads. It always pings above 80 degrees, but aside from that, sometimes it pings, other times not. It's random. Everything points to a hot spot, espeically since pulling it hard once seems to increase the likelyhood of it beginning to ping.
the rev range at which it pings coincides with a NOTICEABLE drop in the engine's torque, pinging or not. It's much stronger after the fueling corrections, but it has to be a good 3 or 4 ft lbs.
I have yet to do a leakdown test or pull the heads to inspect things with my own eyes, but im running out of other options. ECU is getting swapped just to check.
Does anyone have any ideas? I am considering a thermal coat on the head portion of the combustion chamber, since as we all know, hemis get hot. Does anyone have experience with coatings?
Im also considering some head work including oversized valves, since if it's a hot spot, better flow should help reduce heat as well (of course, i wouldnt mind the extra power). I would even consider swapping the engine for a 1200 sport engine, with some cash to compensate. Any interest?
It's not that another engine wont ping, because it might. But everyone else's engines run fine after fueling corrections, and mine does not. So the point in swapping the engine would be to make the problem more correctable.
Anything i havent thought of?
My bike is an 07 griso, but it seems that any information here would apply to any of the modern 2v mills.
The valves are good, the TBs are good, the TPS is good, octane booster doesnt help, no matter how much is used. It's not a lean condition, as the fueling has been corrected. Bedding the temp sensor in thermal mastic doesnt help. Cooler plugs make no difference. Gas brand doesnt make any difference either.
The bike starts fine, and runs great except when it pings. When it does, it's ALWAYS between 4 and 5k rpm, under high loads. It always pings above 80 degrees, but aside from that, sometimes it pings, other times not. It's random. Everything points to a hot spot, espeically since pulling it hard once seems to increase the likelyhood of it beginning to ping.
the rev range at which it pings coincides with a NOTICEABLE drop in the engine's torque, pinging or not. It's much stronger after the fueling corrections, but it has to be a good 3 or 4 ft lbs.
I have yet to do a leakdown test or pull the heads to inspect things with my own eyes, but im running out of other options. ECU is getting swapped just to check.
Does anyone have any ideas? I am considering a thermal coat on the head portion of the combustion chamber, since as we all know, hemis get hot. Does anyone have experience with coatings?
Im also considering some head work including oversized valves, since if it's a hot spot, better flow should help reduce heat as well (of course, i wouldnt mind the extra power). I would even consider swapping the engine for a 1200 sport engine, with some cash to compensate. Any interest?
It's not that another engine wont ping, because it might. But everyone else's engines run fine after fueling corrections, and mine does not. So the point in swapping the engine would be to make the problem more correctable.
Anything i havent thought of?