confused on pistons and rods

chris01 · April 9th, 2011, 08:59 PM

i got my block back from being bored and im looking for new pistons but the ones i find are floating wrist pins. I'm getting the trickflow engine kit and im reusing the crank and the rods. my stock old pistons are still on the rod and i sure the wrist pin is .912 but not completely sure. Can i use my old rod with the new floating piston?

Probe Pistons 14777-030 - Probe SRS Forged Pistons - Overview - SummitRacing.com

horsepowerjunkie · April 10th, 2011, 12:12 AM

You are going to want Probe 14844. They have vavle releifs for the Twisted Wedge head. And yes, they can be used with your stock rods.
14844 - Ford 302/393W -3.0cc Flat Top SRS Pistons

chris01 · April 10th, 2011, 12:02 PM

That's the same piston but I'm going to get it off of summit.. I know I need a piston for the head clearance but can I use a floating piston on my old press fit rod. They have both the same size wrist pins

fogged306 · April 10th, 2011, 12:58 PM

Those are different. The one you posted looks like it's for an inline valve head. The one horsepowerjunkie posted is for a Twisted Wedge head. If you use pistons with inline valve reliefs you may end up with PTV issues depending on what cam you use.

chris01 · April 10th, 2011, 01:15 PM

They say there made for the tw heads but ok say I do get the other ones how will it work with my old rods sence my rods were press and the piston is floating... Or will I not have a problem.

fogged306 · April 10th, 2011, 01:37 PM

I couldn't answer that and be certain. I was under the impression that you couldn't do it that way because of lack of pin oiling, but I could be wrong.

horsepowerjunkie · April 10th, 2011, 03:50 PM

floating pistons will work on a press on rod. They press into the rod, not the piston. Just press them on and leave out the spirolocks!

This is the piston you would need with Twisted Wedge heads from Summit.
http://www.summitracing.com/parts/PBP-14844-030/

chris01 · April 10th, 2011, 05:47 PM

ok thanks

fogged306 · April 10th, 2011, 07:42 PM

Originally Posted by horsepowerjunkie

floating pistons will work on a press on rod. They press into the rod, not the piston. Just press them on and leave out the spirolocks!

This is the piston you would need with Twisted Wedge heads from Summit.
Probe Pistons 14844-030 - Probe SRS Forged Pistons - Overview - SummitRacing.com

I got ya. So you're basically making it a press pin with no need for oiling holes or bushings.

chris01 · April 10th, 2011, 09:07 PM

I learn something new every day

April 9th, 2011, 08:59 PM	#1
chris01 Regular 1992 5.0 hatch, 2001 v6 slow and slower Join Date: Jan 2009 Location: Louisiana, River ridge Posts: 76 iTrader: 0 reviews	confused on pistons and rods i got my block back from being bored and im looking for new pistons but the ones i find are floating wrist pins. I'm getting the trickflow engine kit and im reusing the crank and the rods. my stock old pistons are still on the rod and i sure the wrist pin is .912 but not completely sure. Can i use my old rod with the new floating piston? Probe Pistons 14777-030 - Probe SRS Forged Pistons - Overview - SummitRacing.com __________________ 2001 mustang v6 1992 5.0 hatchback

April 10th, 2011, 12:12 AM	#2
horsepowerjunkie Hardcore Enthusiast 1989 Black LX---Turbo Join Date: Jun 2010 Location: just outside Minot, ND Posts: 1,153 iTrader: 0 reviews	You are going to want Probe 14844. They have vavle releifs for the Twisted Wedge head. And yes, they can be used with your stock rods. 14844 - Ford 302/393W -3.0cc Flat Top SRS Pistons __________________ 89 LX Black, Boss 331, C4,T76BB, FAST EFI 82 Capri RS,89 5.0 HO,Comp XE266,TW 170,T5,etc. 73 Dart Sport 340, 410ci Bracket Brawler 72 Demon 340 4-speed 1 of 1667 01 Ram Quad Cab 03 Grizzley 660

April 10th, 2011, 12:02 PM	#3
chris01 Regular 1992 5.0 hatch, 2001 v6 slow and slower Join Date: Jan 2009 Location: Louisiana, River ridge Posts: 76 iTrader: 0 reviews	That's the same piston but I'm going to get it off of summit.. I know I need a piston for the head clearance but can I use a floating piston on my old press fit rod. They have both the same size wrist pins __________________ 2001 mustang v6 1992 5.0 hatchback

April 10th, 2011, 01:15 PM	#5
chris01 Regular 1992 5.0 hatch, 2001 v6 slow and slower Join Date: Jan 2009 Location: Louisiana, River ridge Posts: 76 iTrader: 0 reviews	They say there made for the tw heads but ok say I do get the other ones how will it work with my old rods sence my rods were press and the piston is floating... Or will I not have a problem. __________________ 2001 mustang v6 1992 5.0 hatchback

April 10th, 2011, 03:50 PM	#7
horsepowerjunkie Hardcore Enthusiast 1989 Black LX---Turbo Join Date: Jun 2010 Location: just outside Minot, ND Posts: 1,153 iTrader: 0 reviews	floating pistons will work on a press on rod. They press into the rod, not the piston. Just press them on and leave out the spirolocks! This is the piston you would need with Twisted Wedge heads from Summit. http://www.summitracing.com/parts/PBP-14844-030/ __________________ 89 LX Black, Boss 331, C4,T76BB, FAST EFI 82 Capri RS,89 5.0 HO,Comp XE266,TW 170,T5,etc. 73 Dart Sport 340, 410ci Bracket Brawler 72 Demon 340 4-speed 1 of 1667 01 Ram Quad Cab 03 Grizzley 660

April 10th, 2011, 12:58 PM	#4
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Those are different. The one you posted looks like it's for an inline valve head. The one horsepowerjunkie posted is for a Twisted Wedge head. If you use pistons with inline valve reliefs you may end up with PTV issues depending on what cam you use.

April 10th, 2011, 01:37 PM	#6
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	I couldn't answer that and be certain. I was under the impression that you couldn't do it that way because of lack of pin oiling, but I could be wrong.

April 10th, 2011, 05:47 PM	#8
chris01 Regular 1992 5.0 hatch, 2001 v6 slow and slower Join Date: Jan 2009 Location: Louisiana, River ridge Posts: 76 iTrader: 0 reviews	ok thanks __________________ 2001 mustang v6 1992 5.0 hatchback

April 10th, 2011, 09:07 PM	#10
chris01 Regular 1992 5.0 hatch, 2001 v6 slow and slower Join Date: Jan 2009 Location: Louisiana, River ridge Posts: 76 iTrader: 0 reviews	I learn something new every day __________________ 2001 mustang v6 1992 5.0 hatchback

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