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240 rods the good ones???

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161henry
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240 rods the good ones???

Post #1 by 161henry » Tue Jan 23, 2018 7:28 am

http://www.rockauto.com/en/catalog/ford ... g+rod,5276

These are the ones with .912 wrist pin and no oil hole correct?

pmuller9
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Re: 240 rods the good ones???

Post #2 by pmuller9 » Tue Jan 23, 2018 9:22 am

Yes
As the picture shows some of the rods may have nicks and bruises.
You may have to order more than six to get six good rods.

161henry
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Re: 240 rods the good ones???

Post #3 by 161henry » Tue Jan 23, 2018 9:56 am

Ill give 6 a try. They have 30 day return so if I don't like some I'll send some back. Or maybe all of them..

n8in8or
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Re: 240 rods the good ones???

Post #4 by n8in8or » Tue Jan 30, 2018 5:43 pm

This seemed like a good deal and I noticed it was a wholesale closeout so who knows when the supply will dry up so I bought some. I ordered 12 to see what would happen. I ended up with 9 good ones.

1 had a knick in the beam
A84961E3-D37C-4F1F-A642-A45917B09A2B.jpeg


1 one was too short (wrong casting C5TE - 300 rod?)
C7BCFFE9-A9FA-4E60-BBFE-6933E52F6697.jpeg


1 the casting was a little thin on the beam so I decided to reject it
2ED54668-E568-4BDB-ABC0-2D8CCFE7FC5C.jpeg
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1994 F150 4x4, 4.9 E4OD. EFI turbo build in progress....

CNC-Dude
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Re: 240 rods the good ones???

Post #5 by CNC-Dude » Tue Jan 30, 2018 5:53 pm

Now see if you can get 6 of them to be close enough weight-wise to make a set.
Image

pmuller9
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Re: 240 rods the good ones???

Post #6 by pmuller9 » Tue Jan 30, 2018 10:26 pm

Polish the beams and have the rods shot peened?
Custom pistons?

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old28racer
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Re: 240 rods the good ones???

Post #7 by old28racer » Tue Jan 30, 2018 11:46 pm

If you are going to balance a set of 6 rods would you balance after shot peening or before?
Bad Day Racing Is Better Than A Day In The Stands :mrgreen:

pmuller9
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Re: 240 rods the good ones???

Post #8 by pmuller9 » Wed Jan 31, 2018 12:26 am

Balancing is the last operation, so after shot peening.

n8in8or
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Re: 240 rods the good ones???

Post #9 by n8in8or » Thu Feb 01, 2018 6:34 pm

pmuller9 wrote:Polish the beams and have the rods shot peened?
Custom pistons?


I'm considering it. It sounded like the rods were getting harder and harder to come across so it I decided to get them while I could. If it makes sense at the time the engine actually comes together than I'll go that route. Otherwise I'll just hang onto them for a someday thing or try to sell them. But I hate selling stuff soo......
1994 F150 4x4, 4.9 E4OD. EFI turbo build in progress....

n8in8or
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Re: 240 rods the good ones???

Post #10 by n8in8or » Thu Feb 01, 2018 6:35 pm

CNC-Dude wrote:Now see if you can get 6 of them to be close enough weight-wise to make a set.


I noticed that the boss at the top of the rods was way different on each rod. It seemed like there was a lot to work with there to try to come up with a balanced set.
1994 F150 4x4, 4.9 E4OD. EFI turbo build in progress....

n8in8or
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Re: 240 rods the good ones???

Post #11 by n8in8or » Thu Feb 01, 2018 6:38 pm

pmuller9 wrote:Polish the beams and have the rods shot peened?

Question about shot peening: if the journals (is that the right term?) are already machined, what do you do about that and shot peening? Does the place doing the shot peening mask the journals off? Or do you have to get the rods re-machined? It would be a shame to have to get these re-machined since they're already done.
1994 F150 4x4, 4.9 E4OD. EFI turbo build in progress....

CNC-Dude
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Re: 240 rods the good ones???

Post #12 by CNC-Dude » Thu Feb 01, 2018 7:22 pm

Typically, I like to remove the rod bolts and polish the beams. Then shotpeen, cut the rod caps and deburr the parting line on the caps and rods. Then install new rod bolts, preferably ARP and torque to specs. Then balance and side clearance the rods, and then recondition as the last step.
Image

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old28racer
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Re: 240 rods the good ones???

Post #13 by old28racer » Thu Feb 01, 2018 11:20 pm

161henry-- thanks for letting me ask about balancing on your rod thread.
Bad Day Racing Is Better Than A Day In The Stands :mrgreen:

n8in8or
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Re: 240 rods the good ones???

Post #14 by n8in8or » Fri Feb 02, 2018 7:17 am

CNC-Dude wrote:Typically, I like to remove the rod bolts and polish the beams. Then shotpeen, cut the rod caps and deburr the parting line on the caps and rods. Then install new rod bolts, preferably ARP and torque to specs. Then balance and side clearance the rods, and then recondition as the last step.


That makes sense to me. So it sounds like my options are either: 1. polish the beams and lighten/balance the big and small ends or 2. use them as cores for a full rework.
1994 F150 4x4, 4.9 E4OD. EFI turbo build in progress....

pmuller9
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Re: 240 rods the good ones???

Post #15 by pmuller9 » Fri Feb 02, 2018 1:31 pm

These rods are typically used for high rpm naturally aspirated applications where ARP rod bolts are recommended.
The rod bolts that came with these rods may be questionable?
I would say cores for total rebuild.
The other thing that I found with 240 rods from different engines or batches is the rod center to centers can vary as much as .004"
That needs to be checked and corrected in the resizing process.

I still recommend shorter rods for turbo application where the piston can have longer skirts with more room for wider ring lands and keep the piston pin low enough so it is not behind the oil ring.
https://www.dropbox.com/s/0a5olnskn79m1 ... 2.JPG?dl=0
There is also more room under the piston head for a "D" dish that will have enough volume to work with lower compression high boost.
Either reworked 300 rods or Molnar 6.385" long rods #CH6385NTB8-A
https://www.dropbox.com/s/dwdhm0yxuqrs5 ... 1.jpg?dl=0

n8in8or
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Re: 240 rods the good ones???

Post #16 by n8in8or » Fri Feb 02, 2018 2:56 pm

Hmmm, ok. Sounds like maybe these rods have no value to me and I should just return them.
1994 F150 4x4, 4.9 E4OD. EFI turbo build in progress....

161henry
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Re: 240 rods the good ones???

Post #17 by 161henry » Fri Feb 02, 2018 6:29 pm

old28racer wrote:161henry-- thanks for letting me ask about balancing on your rod thread.

No problem I learn from every question asked

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