When you remove the tensioner, count how many "clicks" the tensioner is out, if I remember right anything more than 12 clicks and it is time to replace the cam chain. it is not the tensioner itself that will go bad...it is the cam chain that will strecth past its limit. although if you are showing alot of wear on your cam chain guides, I would replace them as well.
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734 09 Raptor
Meglodon by Bo,KW springs, Web 4 Cam, 54mm TB, 105.5mm CP cylinder, 12:1 CP, Barkers Inframe, Dynatek Coil, PC V, Dynatek Programable ignition
CCP stabilizer,+5 swinger,Boss Noss Sys, Direct Drive Lock-up, KDS Evac valve,HID Light conversion,SPAL fan
Tuned by EHS Racing 73hp 51Tq
07 LT-R450
Athena 500cc Kit
Porting by Bo
DMC Pro Comp 4
PCIII
Trinity intake
ATP intake Cam
Boss Noss
Tuned by EHS 50hp 34Tq
I dont even run 91 oct in my quad sometime 87 and my quad hardly ever ping unless im under speed on 5th gear and WOT it will bog down and make some ping sound or if I ride 2 and I climb a very steep hill on second or third WOT meaning about 400 pounds on the bike
and been running with this ping for 2 years and zero lost of peformance or engine faillure
and Im running the shit on the rev limiter 24h7 all I do is beat the shit out of it never been trail ridden only pit ridden
anyways I think its a ping sound, its coming out of the engine and sounds like metal rattling very fast on metal like ting ting ting, when the engine is at full load and in a gear to high for its demand
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Speed Limiter (bypass and grounded)
11,5 cp tech piston
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Last edited by Max9string; 09-30-2012 at 06:47 PM.
I still got the ping i noticed it really well while in a wheelie in 3rd and the went to 4th and the it pinged wice, what exactly does detonation sound like i have been told marbles in a tin can but mine bike will make a metallic ping then abot a second later again it seems to have a slow pattern not like shaking marbles in a tin can?
My quad is having an identical issue, and we have similar builds. It was trying to ping when gassing it yesterday. Running at the Oregon Dunes. Running Pump clear gas there, I believe it's 94. I was told to mix it with 110 by the builder. I had a Tech 11.5:1 piston, +3 TB, HC3 cam with no head work, new timing chain, new tensioner, new oil pump, new +5 balanced, trued, welded crank. CP gave a corrected deck height to have the piston milled to in order to maintain pump gas with the crank.. But obviously that didn't help.
Oh yeah, I also have a full FCI, and Dynatek programable with DL's curves, and a PC5... Haven't put the mix gas in it to see if it solved the problem, it's with the builder right now being checked out.. .Will let you know what he finds..
And yes mine has lived on the dyno lately LOL 67.02 HP with 51.31 TQ, Map is almost perfectly straight Just slightly below the optimal line...
Running at the Oregon Dunes. Running Pump clear gas there, I believe it's 94. I was told to mix it with 110 by the builder. I had a Tech 11.5:1 piston, new +5. CP gave a corrected deck height to have the piston milled to in order to maintain pump gas with the crank.. But obviously that didn't help.
Oh yeah, I also have a full FCI, and Dynatek programable with DL's curves, and a PC5... Haven't put the mix gas in it to see if it solved the problem, it's with the builder right now being checked out.
Why haven't you run the 110 gas, straight or mixed? You are close to 12:1. Milling the piston 'dome' won't change the deck height. Cylinder height variations and gasket thickness will. How much did CP say to take off the piston. .030-.040 sound right? You should check with DL700 for correct amount, at sea level, in Ore dunes. Wet sand requires lots of power and will increase the chance of pinging.
Decide on your octain and let DL700 help you.
I'd even put you over the 12:1 compression with that crankshaft. I would stop mixing and run straight race fuel.
I was going to say over12:1, but it sounds like the piston dome was cut. Just don't know how much. Yes, run race fuel. There is a big difference why they are called 'gas' and 'fuel'. If you want pump gas and not mix, you NEED your piston cut.
My quad is having an identical issue, and we have similar builds. It was trying to ping when gassing it yesterday. Running at the Oregon Dunes. Running Pump clear gas there, I believe it's 94. I was told to mix it with 110 by the builder. I had a Tech 11.5:1 piston, +3 TB, HC3 cam with no head work, new timing chain, new tensioner, new oil pump, new +5 balanced, trued, welded crank. CP gave a corrected deck height to have the piston milled to in order to maintain pump gas with the crank.. But obviously that didn't help.
Oh yeah, I also have a full FCI, and Dynatek programable with DL's curves, and a PC5... Haven't put the mix gas in it to see if it solved the problem, it's with the builder right now being checked out.. .Will let you know what he finds..
And yes mine has lived on the dyno lately LOL 67.02 HP with 51.31 TQ, Map is almost perfectly straight Just slightly below the optimal line...
Disclaimer: My advice is information only and in no way a challange to race or have a measuring contest with anyone , there builder , tuner , best friend , Or guy with super high post count and his dog.
If you are pinging have you checked your air fuel ratio's or puled the timing back to stock?
If you had a true 11.5 to 1 static compression lets say you were at Coo's right now. Based on the weather conditions right now. Your dynamic compression would be 8.40 to 1 with your set up. All based if cam timimg is correct. Will with in pump gas specs.
Possible problem is how your quad was tuned in the first place. The raptor run's in a open loop with no knock sensors.
If it was tuned on a non load dyno it can possibly going lean as soon as you hit sand.
And with a TPS based tune no load given and the qaud's ECU not being able sample wide and or narrow O2's .Nor not even knowing if its pinging.
Then ad more timing to the mix and you will have a possable problem and not even know it.
Modern engine's require less timing then the old counter parts did. Stock Raptor timing is 27degs at WOT with everything set up and tuned correct you might be able to run it up to 29 to 30 degs on pump gas and gain a little.
The gain will look much better on a none load dyno.
Advice if your not good or comfortable reading spark plugs then invest in a wide band O2 set up.
Ride the quad and see when you hear the ping see if it's going lean. Around 11.3 to 11.8 a/f under load is good and up to 12.5 a/f cruising is good. And will like the coulpe extra degree's of timing.
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i didnt read the entire threead since im on my phone, so may have been said but the compression probably isnt the whole issue. i would say the timing is the problem. im at sea level with great air here and havent had much issue with 5mm and tech 11.5. but with 3 degrees of timing have huge issues. thats why 90% of what i do now is 11:1 instead of 11.5 and i still tell customers i dont recommend adding timing
LOL 67.02 HP with 51.31 TQ, Map is almost perfectly straight Just slightly below the optimal line...
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