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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,122
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Teflon Piston Pin Retainers
I have not seen this discussion here..
What's your experience ? I have used these Teflon buttons on various applications. But some will say these are not so good . AFAIK some high-end builders use these , Some custom pistons come made for these only. I would like to know what the brain trust thinks here.
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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02-08-2016, 01:55 PM
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Parrothead member
Join Date: Jul 2003
Location: Monmouth county, NJ USA
Posts: 13,853
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I've always used them with full floating pins. Never had an issue with them.
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Vinny Red '86 944, 05 Ford Super Duty Dually '02 Ram 3500 Diesel 4x4 Dually, '07Jeep Wrangler '62 Mercury Meteor '90 Harley 1200 XL "Live your Life in such a way that the Westboro Baptist Church will want to picket your funeral." |
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02-08-2016, 04:38 PM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,122
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Thanx
With a bit of research here I feel OK I had a so called expert tell me they are no good. People are slow to change . Even Catapiller uses them in some of their BIG diesels .
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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02-08-2016, 08:30 PM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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Technology / engineering in engine rotating assemblies have come a long way in recent years. I believe that Teflon buttons were used in place of or in addition to light weight pin cir-clips. The first I had seen were in fuel drag race engines where running time was extremely short and rapid rotating service was necessary between rounds.
Two of the largest sources of any engine drag when running is 1) Ring stack 2) Pistons. As technology in materials improved ring tension (against the cylinder wall), thickness even shape all play a part in sealing with the least amount of drag. Piston designs have also progressed where the stability in the bore is much better, expansion rates are a lot closer even under extreme heat, have much shorter skirts, pin off-sets that in most cases neutral and lastly incorporating the Teflon buttons as part of the design rather than just a a safety feature in case a cir clip dislodged.
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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02-09-2016, 06:45 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,122
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Yes, I agree.
I have been researching a little more . There is just no end to schooling . The naysayers are just the bar room knockers wit no experience, and, of course, know everything !. I have been reading information from everywhere. One would be surprised (maybe) at the STUPID ) stuff written by idiots . All said and done the answer is - USE THEM !
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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02-09-2016, 06:52 AM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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Further info as I understand it, the buttons are incorporated to control side-to-side movement so to then enhance the piston design; reducing drag
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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02-09-2016, 07:02 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,122
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And to minimize rocking back and fourth .
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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02-09-2016, 07:15 AM
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