Pressed pin to floating pin..
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Pressed pin to floating pin..
I`ve got a set of TRW-2349F30 pistons and they are(i belive) made for a pressed pin.Can you make a floating pin of these? Is it possible to cut a track in them for the locks?
:cheers:
:cheers:
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Pressed pin to floating pin.. (BB wowbagger)
From everything I have read the only real adv of floating over pressed is you can change the pistons or rods without having to press the pin out. There is a minute amount of friction saved but no real big deal for a street eng.
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Re: Pressed pin to floating pin.. (Fevre)
Ok,the reason i`m asking is because all the rods i`ve looked at says its for floating pin.
How about changing a rod from floating to pressed?Is it doable and worth the job?
The rods i`ve been looking at is Scat and Eagle H beam. :smash: :cheers:
How about changing a rod from floating to pressed?Is it doable and worth the job?
The rods i`ve been looking at is Scat and Eagle H beam. :smash: :cheers:
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Pressed pin to floating pin.. (BB wowbagger)
How much horse you looking to run? The Eagle SIR are rated to 700 for BB:
"SIR" Lightweight Connecting Rods Feature:
NEW Forged 5140 Steel Rod
ARP 7/16 Wave-Lok bolts with 12 pt. nuts
Choice of press fit or bushed for floating pins
Each forging is x-rayed, sonic tested & magnafluxed
Shot peened to stress relieve surfaces
Packaged in weight matched sets +/- 2 grams
Perfect choice for Pro-Street, IMCA and classes requiring a "Stock Appearing Rod"
Big block rated to 700 horsepower
[Modified by Fevre, 3:07 PM 8/6/2003]
[Modified by Fevre, 3:07 PM 8/6/2003]
"SIR" Lightweight Connecting Rods Feature:
NEW Forged 5140 Steel Rod
ARP 7/16 Wave-Lok bolts with 12 pt. nuts
Choice of press fit or bushed for floating pins
Each forging is x-rayed, sonic tested & magnafluxed
Shot peened to stress relieve surfaces
Packaged in weight matched sets +/- 2 grams
Perfect choice for Pro-Street, IMCA and classes requiring a "Stock Appearing Rod"
Big block rated to 700 horsepower
[Modified by Fevre, 3:07 PM 8/6/2003]
[Modified by Fevre, 3:07 PM 8/6/2003]
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Re: Pressed pin to floating pin.. (Fevre)
As for power the engine will put out somewhere in the 580-600`s and a torque about 500 (thats the plan anyway).The thing is i want something that can handle 7000 rpm without trouble.Possibly a liiiiittle squirt of Naws :lolg: in the future :smash: :cheers:
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Re: Pressed pin to floating pin.. (BB wowbagger)
I have run into problems with pressed pins. In my last nitrous motor 3 or 4 of the pins were seizing in the pistons. This was at a routine tear down inspection at about 5000 miles. The motor did turn regularly to 7500.
I know run floating pins with double oil holes.
I know run floating pins with double oil holes.
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Race Director
Joined: Nov 2000
Posts: 11,872
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From: Waterloo ontario Canada
Re: Pressed pin to floating pin.. (BB wowbagger)
GM for years said to put a 1/8th hole in the rod small end, in the front in the 6 o clock position. Then they changed it to the very top of the rod, in the center of the small end, then it was back to the front in the 6 ocklock positon. 30 years ago I ran a small home business machining race parts and I did them both ways then ended up putting both oil holes in. I have examples of broken rods but NEVER a piston pin seized in the bore.
So I like to do both holes . I don't drill holes in the pistons. just deburr them and polish the domes.
So I like to do both holes . I don't drill holes in the pistons. just deburr them and polish the domes.
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Re: Pressed pin to floating pin.. (norvalwilhelm)
Hmm...Ok,that sounds like a good idea :thumbs: ,but that operation wouldn`t work out so very well on a pressed pin rod :smash: :cheers:
Do you know if theres a possibility to rebuild a Floating pin rod,to a pressed? :cheers:
Do you know if theres a possibility to rebuild a Floating pin rod,to a pressed? :cheers:
