Sands Posted September 9, 2011 Author Report Share Posted September 9, 2011 First run. Quote Link to comment Share on other sites More sharing options...
Sands Posted September 9, 2011 Author Report Share Posted September 9, 2011 Two movies. Can you detect detonation by the sound of the engine? 15-35 gearing. Quote Link to comment Share on other sites More sharing options...
252wheelieking Posted September 9, 2011 Report Share Posted September 9, 2011 (edited) I have heard that you can hear detonation but I don't know what it sounds like. Pro's describe to us what detonation sound like. I need to know this. Edited September 9, 2011 by 252wheelieking Quote Link to comment Share on other sites More sharing options...
EvilBanshee Posted September 9, 2011 Report Share Posted September 9, 2011 I have heard that you can hear detonation but I don't know what it sounds like. Pro's describe to us what detonation sound like. I need to know this. Yes you can hear detonation. Its a PING-ING sound. It has a different pitch to it. Its a different sounding ping then a regular 2 stroke pipe sound. Quote Link to comment Share on other sites More sharing options...
dcalsv02 Posted September 9, 2011 Report Share Posted September 9, 2011 i read that post and it says the crank let go the heavy damage is from the debris hitting the dome/ piston.. i have never seen heavy pits and impressions from deto alone. its ALWAYS been something in the motor failing from the deto and smashing in between the piston and the dome. talk about stress on a crank after that.. i've seen a bunch of toasted car pistons from massive deto and they are burnt up not damaged.. maybe i am wrong just what i have seen when there is damage like that its time for a teardown. if you put that thing backtogether whatever is weak int he bottom end is going to take the cyl with it.. i'd love to see a detonation only post made up?? maybe HQ needs a engine technical area? i think i have some various domes with deto only and some heads with debris damage as well as deto. i could post them up.. Bump for the engine technical area. I have a dome with some deto i think as well as damage from the bottom end rod bearings having a dance party on top of my piston. Quote Link to comment Share on other sites More sharing options...
Sands Posted September 9, 2011 Author Report Share Posted September 9, 2011 Bump for the engine technical area. I have a dome with some deto i think as well as damage from the bottom end rod bearings having a dance party on top of my piston. Can you show pictures of your damage? Quote Link to comment Share on other sites More sharing options...
LS3 Machine Posted September 10, 2011 Report Share Posted September 10, 2011 Can you show pictures of your damage? 1st post in the thread. Quote Link to comment Share on other sites More sharing options...
252wheelieking Posted September 10, 2011 Report Share Posted September 10, 2011 LS3, Sands is the guy that started this thread & wants to see pics of decalv02 engine damage from detonation. Quote Link to comment Share on other sites More sharing options...
Pasi S. Posted September 10, 2011 Report Share Posted September 10, 2011 After looking your vid´s... I´m not a pro or anything, but the sound is rich IMO. I´m not 100% sure but is your clutch slipping? Why does it not lift the front end up anywhere? -Pasi S. Quote Link to comment Share on other sites More sharing options...
camatv Posted September 10, 2011 Report Share Posted September 10, 2011 easy way to describe deto is. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkcccccccccccccccccccccccccccccccckkkkkkkkkkkkkkkkkkkkkkkkkkkkkcccccccccccc it will usually do this at full throttle. a Lean hang or lean out on alky deto sounds a lil differnt. usually if your bike wont come right back to idle after a long run its fuel starved at the end it will go burr burrr burr burr buuuuuurrrrrrrrrrrrrrrrrrrrrrr Quote Link to comment Share on other sites More sharing options...
georgie Posted September 10, 2011 Report Share Posted September 10, 2011 After looking your vid´s... I´m not a pro or anything, but the sound is rich IMO. I´m not 100% sure but is your clutch slipping? Why does it not lift the front end up anywhere? -Pasi S. Looks like you have a slipping clutch. You should be able to stretch the gears longer, your front should come up ( even a little ) with that short swing arm you have. Run a lock up with stock springs or heavy duty clutch Quote Link to comment Share on other sites More sharing options...
Sands Posted September 10, 2011 Author Report Share Posted September 10, 2011 The clutch doesn't slip. It's hard to believe but this asphalt is very bad. I have a +2 inches swingarm. Quote Link to comment Share on other sites More sharing options...
camatv Posted September 11, 2011 Report Share Posted September 11, 2011 that sucka has a ton of compression.. Quote Link to comment Share on other sites More sharing options...
LS3 Machine Posted September 12, 2011 Report Share Posted September 12, 2011 LS3, Sands is the guy that started this thread & wants to see pics of decalv02 engine damage from detonation. Oops. Thanks. When I had my bottom end too lean (pilot jets), it made a popping sound when rolling on the throttle at the beginning of 1st gear. It might be better if you zip tied the camera on the bike, but IDK if it would pick up too much wind noise that way. Quote Link to comment Share on other sites More sharing options...
LS3 Machine Posted September 12, 2011 Report Share Posted September 12, 2011 It shouldn't be... I think that they couldn't sell 98 octans if the fuel doesn't have it. If you ordered your parts from a US Shop, and told them to set you up for 98 Octane, they set you up for a US based Octane of 98. The European Octane Rating of 98 is about the US Octane Rating of 91 or 92. I know this for a fact, Im not guessing. I have lived for years on both sides of the pond. If this is what happened, it is 100% the reason you have the bad damage to your pistons. You will need to rebuild, and when you rebuild the engiine, if you use parts from a US shop, tell them 92 Octane (unless you are wealthy and just like rebuilding engines). Research Octane Number (RON)The most common type of octane rating is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane. (USA uses RON divided by MON - Tim) Motor Octane Number (MON)There is another type of octane rating, called Motor Octane Number (MON), or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load, as it is determined at 900 rpm engine speed, instead of the 600 rpm for RON.[2][3] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON, however there is no direct link between RON and MON. Normally, fuel specifications require both a minimum RON and a minimum MON. Anti-Knock Index (AKI)In most countries, including Australia and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States and some other countries, like Brazil, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI, and often written on pumps as (R+M)/2). It may also sometimes be called the Pump Octane Number (PON). Quote Link to comment Share on other sites More sharing options...
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