Teminology: four corner scoring on piston
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Teminology: four corner scoring on piston
I've wanted to ask this since you first posted this. "How did you get corners on a round cylinder and piston?"
Mod: This is split from another thread. We have strong discussion on validity it's name, and some technical info.
-- Couple thoughts --
Googling the term does give hits as posters have suggested. In a general sense, we should have a piston failures wiki topic. We could add local information (wikispredia) and links to cover this term.
What is the definition of four corner scoring?
Has this faiure gone by other names in the past?
What are its causes and mitgations?
Mod: This is split from another thread. We have strong discussion on validity it's name, and some technical info.
-- Couple thoughts --
Googling the term does give hits as posters have suggested. In a general sense, we should have a piston failures wiki topic. We could add local information (wikispredia) and links to cover this term.
What is the definition of four corner scoring?
Has this faiure gone by other names in the past?
What are its causes and mitgations?
Terminology discussion: four corner scoring on piston
Bear45-70 wrote:I've wanted to ask this since you first posted this. "How did you get corners on a round cylinder and piston?"guen84 wrote:i recently took my 51mm mini stroke top end apart, found major four corner scoring and carbon build up on under side of piston. .....................................................
simple geometry my grizzly, when it comes to a piston it would be the four sides next to the wrist pin since they are the thickest part of the piston they will hold heat longer than any other part of the piston.... so what do i owe the honor of the (great)bear45-70 and the (great)maddog too both nit pick my post.. bear your lucky i gave you the answer poor maddog still trying to find out what a dictionary is.. SO TO BOTH OF YOU TRY GOOGLE'IN YOUR STUPID QUESTIONS BEFORE YOU TRY AND START A FIGHT.. CAUSE THATS ALL BOTH OF YOU GUYS DO ON THIS SITE!!!! baka knew exactly what i was talking about did he google it or humm maybe he knows what his s***???
2001 Elite,50mm bbk, 44.1 mm mini stroker
28mm oko carb, no restriction air filter, ct intake
zx clutch, polini for ruckus vari, pg long, 7.7 gears
1999 Elite 51mm bbk, oko vari, sef ramp plate, 8.44 gears
28mm oko carb, no restriction air filter, ct intake
zx clutch, polini for ruckus vari, pg long, 7.7 gears
1999 Elite 51mm bbk, oko vari, sef ramp plate, 8.44 gears
Re: four corner scoring on piston
thats why i have been saying on the taiwan bores you need to run a flex hone through it and round the edges on the piston and put a angle around the edges of the skirt and and straight edge on the piston so it can grab oil. also if using pump gas you need to lower the compression to lower the compression ratio to be stable for pump gas,if not its going to run hot and no matter if there is oil getting between the piston from shamfering the piston. it will still seize as the temp of aluminum melting will be reached.
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Re: four corner scoring on piston
You can spout all the BS you want, but around object do not now or never will have corners. Oh, in simple or complex geometry round objects still don't have corners. Education system fail again.guen84 wrote:Bear45-70 wrote:I've wanted to ask this since you first posted this. "How did you get corners on a round cylinder and piston?"guen84 wrote:i recently took my 51mm mini stroke top end apart, found major four corner scoring and carbon build up on under side of piston. .....................................................
simple geometry my grizzly, when it comes to a piston it would be the four sides next to the wrist pin since they are the thickest part of the piston they will hold heat longer than any other part of the piston.... so what do i owe the honor of the (great)bear45-70 and the (great)maddog too both nit pick my post.. bear your lucky i gave you the answer poor maddog still trying to find out what a dictionary is.. SO TO BOTH OF YOU TRY GOOGLE'IN YOUR STUPID QUESTIONS BEFORE YOU TRY AND START A FIGHT.. CAUSE THATS ALL BOTH OF YOU GUYS DO ON THIS SITE!!!! baka knew exactly what i was talking about did he google it or humm maybe he knows what his s***???
Bear 45/70
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Re: four corner scoring on piston
You can spout all the BS you want, but around object do not now or never will have corners. Oh, in simple or complex geometry round objects still don't have corners. Education system fail again.[/quote]
I guess Bear requests quadrants there can be be corners if a circle is divided into them. Geez, take it easy guys this is a forum not a classroom. Calm down read this http://www.mathwords.com/q/quadrants.htm lol
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Re: four corner scoring on piston
I guess Bear requests quadrants there can be be corners if a circle is divided into them. Geez, take it easy guys this is a forum not a classroom. Calm down read this http://www.mathwords.com/q/quadrants.htm lol[/quote]deuce217 wrote:
You can spout all the BS you want, but around object do not now or never will have corners. Oh, in simple or complex geometry round objects still don't have corners. Education system fail again.
I require simple logic and a circle does not now and never will have corners. *, look up the definition of a corner and then explain how a circle can have one much less four corners.
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Re: four corner scoring on piston
I require simple logic and a circle does not now and never will have corners. *, look up the definition of a corner and then explain how a circle can have one much less four corners.[/quote]Bear45-70 wrote:I guess Bear requests quadrants there can be be corners if a circle is divided into them. Geez, take it easy guys this is a forum not a classroom. Calm down read this http://www.mathwords.com/q/quadrants.htm loldeuce217 wrote:
You can spout all the BS you want, but around object do not now or never will have corners. Oh, in simple or complex geometry round objects still don't have corners. Education system fail again.
I will not argue that Bear, Im just saying most fellas don't talk about these subjects on the same level as a mechanical engineer or a machinist.
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
Re: four corner scoring on piston
I will not argue that Bear, Im just saying most fellas don't talk about these subjects on the same level as a mechanical engineer or a machinist.[/quote]deuce217 wrote:I require simple logic and a circle does not now and never will have corners. *, look up the definition of a corner and then explain how a circle can have one much less four corners.Bear45-70 wrote:I guess Bear requests quadrants there can be be corners if a circle is divided into them. Geez, take it easy guys this is a forum not a classroom. Calm down read this http://www.mathwords.com/q/quadrants.htm loldeuce217 wrote:
You can spout all the BS you want, but around object do not now or never will have corners. Oh, in simple or complex geometry round objects still don't have corners. Education system fail again.
I'm neither of those and would never claim to be. But I know that a corner has a sharp point to be a corner and circles do not.
Bear 45/70
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Re: four corner scoring on piston
Bear45-70 wrote:I'm neither of those and would never claim to be. But I know that a corner has a sharp point to be a corner and circles do not.
But you sure have alot to say about something you now nothing about!
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66cc bbk
118jet/Pre-Mix32:1
1"uni-filter,Keli 9g
1k center,8.44 gears,ZX Trans
V8 Pipe,IRC MB38 80/90 tires
H4 H.I.D
94 elite 50sr
-----
50mm BBK,105jet
1" Uni-Filter,8:44gears
Re: four corner scoring on piston
Wrong dogbreath, but I took Algebra in the last century and guess what, corners were pointie even back then. Crap, dealing with those that were sent to a failed education system that thinks failing to understand is OK makes teaching them impossible. Thanks liberal educators of America.ZMUD wrote:Bear45-70 wrote:I'm neither of those and would never claim to be. But I know that a corner has a sharp point to be a corner and circles do not.
But you sure have alot to say about something you now nothing about!
Bear 45/70
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- Wheelman-111
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Re: four corner scoring on piston
Greetings:
I think he means the edges of the cutouts in the piston below the wrist pin.
So, yes a cylinder has no corners. Unless you cut an arch into it... Sheesh, what are y'all in Kindergarten?
Zee-Mud, I need a close-up of your avatar for um... scientific research. Yeah, that's it! Science!!
I think he means the edges of the cutouts in the piston below the wrist pin.
So, yes a cylinder has no corners. Unless you cut an arch into it... Sheesh, what are y'all in Kindergarten?
Zee-Mud, I need a close-up of your avatar for um... scientific research. Yeah, that's it! Science!!
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Re: four corner scoring on piston
http://i145.photobucket.com/albums/r206 ... 9Adams.gifWheelman-111 wrote:Greetings:
I think he means the edges of the cutouts in the piston below the wrist pin.
So, yes a cylinder has no corners. Unless you cut an arch into it... Sheesh, what are y'all in Kindergarten?
Zee-Mud, I need a close-up of your avatar for um... scientific research. Yeah, that's it! Science!!
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
Re: four corner scoring on piston
deuce217 wrote:Wheelman-111 wrote:Greetings:
I think he means the edges of the cutouts in the piston below the wrist pin.
So, yes a cylinder has no corners. Unless you cut an arch into it... Sheesh, what are y'all in Kindergarten?
Zee-Mud, I need a close-up of your avatar for um... scientific research. Yeah, that's it! Science!!
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
Re: four corner scoring on piston
bear Google 4 corner seizers, then talk s***. ill make sue I post some pics when I get a chance. so then maybe u will under stand the point. of the. thread.
2001 Elite,50mm bbk, 44.1 mm mini stroker
28mm oko carb, no restriction air filter, ct intake
zx clutch, polini for ruckus vari, pg long, 7.7 gears
1999 Elite 51mm bbk, oko vari, sef ramp plate, 8.44 gears
28mm oko carb, no restriction air filter, ct intake
zx clutch, polini for ruckus vari, pg long, 7.7 gears
1999 Elite 51mm bbk, oko vari, sef ramp plate, 8.44 gears
Re: four corner scoring on piston
Just because the world is full of morons that post BS on the net, does not now and never will make a round object have corners. Or are you really so dense you can't figure that out? Hummmmm......maybe your are.guen84 wrote:bear Google 4 corner seizers, then talk s***. ill make sue I post some pics when I get a chance. so then maybe u will under stand the point. of the. thread.
Bear 45/70
'83 Aero 80 X 3
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'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree