what color should a piston be?
09-16-2007, 07:00 PM
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what color should a piston be?
here is a picture of my os.18tm's piston [link=http://i220.photobucket.com/albums/dd297/bigblock400/MyPictures0002.jpg]picture[/link] it is black what does that mean. here is a pic of the head [link=http://i220.photobucket.com/albums/dd297/bigblock400/MyPictures0001.jpg]picture[/link]
the temps were kinda high. this is with 2 gallons of 10% top fuel and almost 1 gallon of the 20%.
the temps were kinda high. this is with 2 gallons of 10% top fuel and almost 1 gallon of the 20%.
09-16-2007, 07:22 PM
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RE: what color should a piston be?
wow, i don't really know what to tell you on that but on my 3.3 engine i just took it apart last week to clean it after 3 gallons and it was not even a little black.. shinny chrome/silver.
Im sure someone help you out a little better
Im sure someone help you out a little better
09-16-2007, 09:36 PM
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RE: what color should a piston be?
ORIGINAL: RCCanuck
thats burnt synthec oil and additives that are in the Traxxas fuel...get some Odonnels or some sidewinder 20%...
thats burnt synthec oil and additives that are in the Traxxas fuel...get some Odonnels or some sidewinder 20%...
09-16-2007, 10:09 PM
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RE: what color should a piston be?
^^its actually burnt castor oil^^
well heres my pro.15 after 9 years of using byrons. you guys must run yours dangerously lean and i dont run mine rich like many of you may think. usually lean til it doesnt run hot (280+).
well heres my pro.15 after 9 years of using byrons. you guys must run yours dangerously lean and i dont run mine rich like many of you may think. usually lean til it doesnt run hot (280+).
09-18-2007, 10:28 AM
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RE: what color should a piston be?
can the glow plug back out and if it can what can i do to stop it. and it is the stock os.18tm glow plug. ran kinda hot. but it is still hard when the piston was out to make it touch the top.
09-18-2007, 11:42 AM
#12
RE: what color should a piston be?
ORIGINAL: bigblock572
can the glow plug back out and if it can what can i do to stop it. and it is the stock os.18tm glow plug. ran kinda hot. but it is still hard when the piston was out to make it touch the top.
can the glow plug back out and if it can what can i do to stop it. and it is the stock os.18tm glow plug. ran kinda hot. but it is still hard when the piston was out to make it touch the top.
Traxxas fuel has Castor oil in it...a GOOD thing for bashing and general messin' around. When an engine gets real hot, the Castor will continue to provide protection long after most (all but the extremely expensive ) synthetic oils have burned off.
Those deposits aren't too bad considering almost 3 gal. through a small engine like that...and they are caused by the Castor getting very hot and forming varnish and a little carbon. A little varnish is not necessarily a bad thing...it will help seal a slightly loose piston/cylinder fit (for one thing ) and provide an extreme pressure/temp lube effect if the engine gets waaayyy too hot.
If you go to the RB Concept forums, you'll see that Castor is highly recommended...
If the engine still has a bit of "pinch" at TDC when you turn it over slowly (w/o plug ) then it should be o.k.
When you put the head back on, don't over torque the head bolts. After you just "bring them down" just enough to keep the sleeve from popping up when you turn the crank, turn it over to get a feel for the piston/sleeve fit or "pinch"...then gently torque the head bolts in an X pattern in at least 3 steps...feeling the "pinch" at each step.
09-19-2007, 01:56 PM
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RE: what color should a piston be?
ORIGINAL: proptop
If the plug backs out, then yes, the engine will run hot...
Traxxas fuel has Castor oil in it...a GOOD thing for bashing and general messin' around. When an engine gets real hot, the Castor will continue to provide protection long after most (all but the extremely expensive ) synthetic oils have burned off.
Those deposits aren't too bad considering almost 3 gal. through a small engine like that...and they are caused by the Castor getting very hot and forming varnish and a little carbon. A little varnish is not necessarily a bad thing...it will help seal a slightly loose piston/cylinder fit (for one thing ) and provide an extreme pressure/temp lube effect if the engine gets waaayyy too hot.
If you go to the RB Concept forums, you'll see that Castor is highly recommended...
If the engine still has a bit of "pinch" at TDC when you turn it over slowly (w/o plug ) then it should be o.k.
When you put the head back on, don't over torque the head bolts. After you just "bring them down" just enough to keep the sleeve from popping up when you turn the crank, turn it over to get a feel for the piston/sleeve fit or "pinch"...then gently torque the head bolts in an X pattern in at least 3 steps...feeling the "pinch" at each step.
ORIGINAL: bigblock572
can the glow plug back out and if it can what can i do to stop it. and it is the stock os.18tm glow plug. ran kinda hot. but it is still hard when the piston was out to make it touch the top.
can the glow plug back out and if it can what can i do to stop it. and it is the stock os.18tm glow plug. ran kinda hot. but it is still hard when the piston was out to make it touch the top.
Traxxas fuel has Castor oil in it...a GOOD thing for bashing and general messin' around. When an engine gets real hot, the Castor will continue to provide protection long after most (all but the extremely expensive ) synthetic oils have burned off.
Those deposits aren't too bad considering almost 3 gal. through a small engine like that...and they are caused by the Castor getting very hot and forming varnish and a little carbon. A little varnish is not necessarily a bad thing...it will help seal a slightly loose piston/cylinder fit (for one thing ) and provide an extreme pressure/temp lube effect if the engine gets waaayyy too hot.
If you go to the RB Concept forums, you'll see that Castor is highly recommended...
If the engine still has a bit of "pinch" at TDC when you turn it over slowly (w/o plug ) then it should be o.k.
When you put the head back on, don't over torque the head bolts. After you just "bring them down" just enough to keep the sleeve from popping up when you turn the crank, turn it over to get a feel for the piston/sleeve fit or "pinch"...then gently torque the head bolts in an X pattern in at least 3 steps...feeling the "pinch" at each step.
i heard traxxas has synthetic...but it doesnt realy matter it still isnt the greatest (smells good though)
09-19-2007, 02:02 PM
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RE: what color should a piston be?
ORIGINAL: jkdv8
they use a blend of both. and to much at that.
they use a blend of both. and to much at that.
yea...i tried to say something to traxxass before, and to kinda sum it up they said its a bashing fuel made to keep your engine alive longer...although after seeing some engines run on bryons i realy dont see much of a difference
09-19-2007, 02:16 PM
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RE: what color should a piston be?
ORIGINAL: jatoracing33
although after seeing some engines run on bryons i realy dont see much of a difference
although after seeing some engines run on bryons i realy dont see much of a difference
09-19-2007, 03:58 PM
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RE: what color should a piston be?
sorry...what i had meant is that the extra oil doesnt make a difference...i didnt mean that bryons doesnt make a difference...my fualt for not clearly stating that
09-20-2007, 01:58 PM
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RE: what color should a piston be?
ORIGINAL: jkdv8
i apologize jato. no pun intended.
got to love the smell of nitro in the morning. even if the neighbors dont.[sm=tongue_smile.gif]
i apologize jato. no pun intended.
got to love the smell of nitro in the morning. even if the neighbors dont.[sm=tongue_smile.gif]
no biggy
09-20-2007, 06:43 PM
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RE: what color should a piston be?
^^its actually burnt castor oil^^
well heres my pro.15 after 9 years of using byrons. you guys must run yours dangerously lean and i dont run mine rich like many of you may think. usually lean til it doesnt run hot (280+).
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well heres my pro.15 after 9 years of using byrons. you guys must run yours dangerously lean and i dont run mine rich like many of you may think. usually lean til it doesnt run hot (280+).
Attachments
Click for fullsize
Click for fullsize
