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Floating pins....Is this correct?? #884828 12/20/10 11:20 PM 12/20/10 11:20 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer OP master
Bob_Coomer OP master Joined: Nov 2003 Posts: 6,293 Rock Springs	Picked up a set of pistons and rods. The pistons are TRW 2295's anyways they have stock "LY" rods that have been converted to floating pins. But the small end of the rods is NOT bushed. Looks like its just been bored/honed for pin fit. The wrist pins look good no wear, but I was thinking you really didnt want to run steel on steel like that. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Floating pins....Is this correct?? [Re: Bob_Coomer] #884829 12/20/10 11:24 PM 12/20/10 11:24 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I've seen that a few times... never had any pin issues

Re: Floating pins....Is this correct?? [Re: MR_P_BODY] #884830 12/20/10 11:27 PM 12/20/10 11:27 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer OP master
Bob_Coomer OP master Joined: Nov 2003 Posts: 6,293 Rock Springs	Quote: I've seen that a few times... never had any pin issues Think they will be OK Mr-P? Given clearance is correct? Clearance is correct on these BTW... Anyone else run them like this? [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Floating pins....Is this correct?? [Re: Bob_Coomer] #884831 12/20/10 11:42 PM 12/20/10 11:42 PM
Joined: May 2007 Posts: 174 Oklahoma H hemiiroc member
hemiiroc member H Joined: May 2007 Posts: 174 Oklahoma	People used to to it all the time.

Re: Floating pins....Is this correct?? [Re: Bob_Coomer] #884832 12/20/10 11:48 PM 12/20/10 11:48 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: I've seen that a few times... never had any pin issues Think they will be OK Mr-P? Given clearance is correct? Clearance is correct on these BTW... Anyone else run them like this? I bought a engine and thats the way it was set up... I ran it for 3 years then sold the car

Re: Floating pins....Is this correct?? [Re: hemiiroc] #884833 12/20/10 11:50 PM 12/20/10 11:50 PM
Joined: Nov 2009 Posts: 3,410 Belpre,Ohio C CHAPPER master
CHAPPER master C Joined: Nov 2009 Posts: 3,410 Belpre,Ohio	Are the pin bosses on the pistons drilled for oil entrance? If not,,should be. I have done this in the 'past',,with no problems. If you like drag racing, support your local track.

Re: Floating pins....Is this correct?? [Re: CHAPPER] #884834 12/20/10 11:54 PM 12/20/10 11:54 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Are the pin bosses on the pistons drilled for oil entrance? If not,,should be. I have done this in the 'past',,with no problems. Also see if the rod has a oil hole on the top

Re: Floating pins....Is this correct?? [Re: MR_P_BODY] #884835 12/21/10 12:05 AM 12/21/10 12:05 AM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	I would either DLC or casadium coat them if there is no bushing. BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Floating pins....Is this correct?? [Re: MR_P_BODY] #884836 12/21/10 12:07 AM 12/21/10 12:07 AM
Joined: Feb 2004 Posts: 622 ct jkgtx mopar
jkgtx mopar Joined: Feb 2004 Posts: 622 ct	have a 440 i built 20= years ago small end honed and drilled did lots bracket racing no problems running high elevens [b] [color:"red"] 67 GTX 440 twin turbo efi 10.72 128 3900lb 3.55

Re: Floating pins....Is this correct?? [Re: Bob_Coomer] #884837 12/21/10 12:08 AM 12/21/10 12:08 AM
Joined: Nov 2004 Posts: 3,544 Syracuse,NY CompWedgeEngines master
CompWedgeEngines master Joined: Nov 2004 Posts: 3,544 Syracuse,NY	They will be fine. Same deal we did for years with stock small block rods. As long as your not running high rpms, it works just fine. Cant hurt to add a chamfered oil hole from the top of the small rod end into the pin hole. RIP Monte Smith Your work is a reflection of yourself, autograph it with quality. WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.

Re: Floating pins....Is this correct?? [Re: jkgtx] #884838 12/21/10 12:11 AM 12/21/10 12:11 AM
Joined: Aug 2006 Posts: 614 Michigan G Get-X mopar
Get-X mopar G Joined: Aug 2006 Posts: 614 Michigan	Done it many times, never had a problem. '65 Belvedere '68 GTX '57 Dodge pickup

Re: Floating pins....Is this correct?? [Re: Get-X] #884839 12/21/10 12:17 AM 12/21/10 12:17 AM
Joined: Dec 2008 Posts: 1,285 okla. sam64 pro stock
sam64 pro stock Joined: Dec 2008 Posts: 1,285 okla.	i have set like this also,if the pin does bind-hangup whats the difference from it being pressed fit in the rod.what i do know is those pistons and pins are very heavy.

Re: Floating pins....Is this correct?? [Re: sam64] #884840 12/21/10 12:40 AM 12/21/10 12:40 AM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer OP master
Bob_Coomer OP master Joined: Nov 2003 Posts: 6,293 Rock Springs	No oil holes on the pistons bottom on the area of the wrist pin boss. The rod does have a oil hole on top through to the pin area. Thanks Guys This is going in a daily driver BTW. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Floating pins....Is this correct?? [Re: sam64] #884841 12/21/10 12:43 AM 12/21/10 12:43 AM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: i have set like this also,if the pin does bind-hangup whats the difference from it being pressed fit in the rod. the difference is when you use a pressed wrist pin you don't use pin locks. But hey I just offer correct advice BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Floating pins....Is this correct?? [Re: bigtimeauto] #884842 12/21/10 12:44 AM 12/21/10 12:44 AM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Why don't you just have them bushed if your on a budget? BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Floating pins....Is this correct?? [Re: Bob_Coomer] #884843 12/21/10 12:45 AM 12/21/10 12:45 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: No oil holes on the pistons bottom on the area of the wrist pin boss. The rod does have a oil hole on top through to the pin area. Thanks Guys This is going in a daily driver BTW. I just had the hole in the rod... you should be fine with the proper clearance

Re: Floating pins....Is this correct?? [Re: bigtimeauto] #884844 12/21/10 01:46 AM 12/21/10 01:46 AM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer OP master
Bob_Coomer OP master Joined: Nov 2003 Posts: 6,293 Rock Springs	Quote: Why don't you just have them bushed if your on a budget? well If I was on a true budget, and the current setup was insufficient, I would simply ditch the whole floating pin and just use a nice set of stock pressed rods I have available. Simple is best in this case, no keepers or locks to come loose etc. Which these aren't the spiral locks Im use too these are double snap ring type keepers. What would be the gains of a floating pins vs pressed in a set up such as this? Id say Zilch, but I'm a glass half empty kinda guy, I suppose. I actually thought about drilling a 1/8-3/16 inch hole in the piston wrist pin boss area (each side) on the bottom, wouldn't cost much, I suppose enough oil fly's up top at idle in certain condition's to keep everything happy. Opinions? [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Floating pins....Is this correct?? [Re: Bob_Coomer] #884845 12/21/10 01:54 AM 12/21/10 01:54 AM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	there is no gain in this app so then just press a pin in another rod and have at it. But i would not take a chance of steel to steel with locks on the pistons for the price of bushings or coating. I guess me being a buisness and having to stand behind everything makes me stay on the careful side. BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Floating pins....Is this correct?? [Re: bigtimeauto] #884846 12/21/10 01:09 PM 12/21/10 01:09 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	i've run no bushing before, and no oil hole. no problem at all. 8000 rpm small block chevy that saw some street duty, so it was subjected to a rainbow of operating regimes. that thing was hella fast, and hella reliable. for a chevy. for what is the good life if not doing things thoughtfully?

Re: Floating pins....Is this correct?? [Re: maximum entropy] #884847 12/21/10 01:57 PM 12/21/10 01:57 PM
Joined: Jan 2003 Posts: 3,575 The Netherlands BigBlockMopar master
BigBlockMopar master Joined: Jan 2003 Posts: 3,575 The Netherlands	The friction of steel-vs-steel is most likely greater then steel-vs-aluminium so the pin probably won't move much in the rod itself anyway. Even more so because there's probably more friction-pressure on the area of the pin where the rod is located while that same pressure is divided over the 2 piston holes areas, limiting pin-movement and rotation in the rod even more. BigBlockMopar.com

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