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Re: Piston pin "buttons" ... ?
[Re: CJK440]
#633425
03/09/10 10:14 AM
03/09/10 10:14 AM
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Anonymous
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Anonymous
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Quote:
What is the failure rate of a double spirolock?
almost never when properly installed. i use single spirolocks (.073) frequently as well as buttons for higher end stuff that'll see more frequent freshen-ups.
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Re: Piston pin "buttons" ... ?
[Re: CJK440]
#633426
03/09/10 01:26 PM
03/09/10 01:26 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Quote:
What is the failure rate of a double spirolock?
Not about failure for me. For the same, or even a little more money, I use buttons for ease of installation and simplicity. A double spiro-lock won't come out, if they are the right size and installed properly, but they are a major pain in the a$$ and that is enough for me to do something else.
Monte
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Re: Piston pin "buttons" ... ?
[Re: Monte_Smith]
#633427
03/09/10 03:09 PM
03/09/10 03:09 PM
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Anonymous
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Anonymous
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i agree, double sirolocks are a pain, not so much to get them in, but to have to take them out on freshen-ups. that's why i typically use the wider singles or buttons if the customer will pay the little bit extra for them. (spirolocks are usually included with the price of the pistons) here's a picture of some buttons with over 1000 passes on them. the oil ring actually holds these in place. when that's not the case, they are cam ground to go in only one way.
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Re: Piston pin "buttons" ... ?
#633428
03/09/10 03:11 PM
03/09/10 03:11 PM
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Anonymous
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Anonymous
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another, can't get much easier than that.
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Re: Piston pin "buttons" ... ?
#633430
03/09/10 04:20 PM
03/09/10 04:20 PM
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Joined: Feb 2004
Posts: 3,441 Mo.
supercomp
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master
Joined: Feb 2004
Posts: 3,441
Mo.
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Quote:
i agree, double sirolocks are a pain, not so much to get them in, but to have to take them out on freshen-ups. that's why i typically use the wider singles or buttons if the customer will pay the little bit extra for them. (spirolocks are usually included with the price of the pistons) here's a picture of some buttons with over 1000 passes on them. the oil ring actually holds these in place. when that's not the case, they are cam ground to go in only one way.
How much more are we talking about Dan?
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Re: Piston pin "buttons" ... ?
[Re: jamesc]
#633431
03/09/10 04:28 PM
03/09/10 04:28 PM
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Anonymous
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Anonymous
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this is just my opinion, but buttons are better suited to the race motors and not your average daily driver. like i said before, they're better for combo's that require more frequent freshen-ups as opposed to motors that will likely not be torn down for many years or 50,000 miles.
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Re: Piston pin "buttons" ... ?
[Re: blownEFI]
#633433
03/10/10 12:57 AM
03/10/10 12:57 AM
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Joined: Jul 2008
Posts: 30,460 Florida STAYcation
dOc !
OP
The village idiot's idiot
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OP
The village idiot's idiot
Joined: Jul 2008
Posts: 30,460
Florida STAYcation
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THX furr all the chit-chat guys ... it has been a long, LONG time since I have put together a "floater" piston motor. That - JUST ONE - was a 440 I picked up in-a-basket off of Tradin' Times(weekly classified ad newspaper) in the Detroit area. MT pistons with the big-ole pop-ups AND Dykes rings .... THAT had the spiril locks and what a PITA ... but that motor FLEW. 119 mph through the muffs ...spinning the tires. OK now .... makes a lot of sense to go to the piston manufacturer for buttons .. but HOW ABOUT these old-school TRW's ? ..... dHam or M S ...whatcha' got ?
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