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View Full Version : Messed up rods?

ZX2guy19
07-25-2008, 12:20 PM
Alright, so where the rod seperates for the bearings and such, the surface should be complete smooth and flat, right? The SVT rods I got are like all jagged and shit. The pictures you see where it looks like there are chips, there are. Are these bad?

http://i6.photobucket.com/albums/y225/chopperman19/001.jpg
http://i6.photobucket.com/albums/y225/chopperman19/002-1.jpg
ZX2guy19
07-25-2008, 12:21 PM
In those pictures, the surface that I am taking a picture of is really jagged and stuff, like they broke or something. When they are bolted on they are fine, they just aren't smooth.
CT9A
07-25-2008, 12:29 PM
Those pictures are way to blurry see what you are talking about. From those it just looks like a rod with what looks like half the main bearing still in it to me. I see nothing wrong
ZX2guy19
07-25-2008, 12:36 PM
You don't really need the pics I guess lol. My question is, the surface where the two connecting areas go to is really jaggy and almost looks chipped and stuff.
2000ZxT
07-25-2008, 01:35 PM
Noooo they are fine.

That's that way the SVT rods are, you must keep each bottom half with the according half.

The problem with your rods is that one of them spun a bearing. You should have a machine shop oversize that one and buy the bearing from rockauto that I showed you to match it.

I know what your talking about with the jagged part (you need to turn on macro on the camera to show what your talking about). Rest assure that is normal. It's forged as one piece and then they break it apart resulting in the jagged edges.
JohnP
07-25-2008, 01:38 PM
Just clean up the edges , don't take anything off the flat surface or inside the bore , If you do the rods will have to be re-sized . The rods are made in one piece , then split/cracked , then bored and honed to size .
Escort Pimp
07-25-2008, 01:57 PM
Yeah, like JohnP said the rods are one piece and broken into two. The stock rods are the same way. Noob
ZX2guy19
07-25-2008, 01:59 PM
John says that these are no good for boost.
JohnP
07-25-2008, 02:02 PM
The pistons are cast not for a lot of boost , the rods are forged they should be fine.
Escort Pimp
07-25-2008, 02:10 PM
The svt pistons are Hypereutectic which are more resistant to heat than regular cast pistons. They're nothing like forged, but better than your average cast piston
4U2QUIK
07-25-2008, 03:56 PM
a whole lot better than a cast piston.
JohnP
07-25-2008, 04:15 PM
Hyer's are a lot better then the stock , but are more brittle and can't take a lot of detonation . Check behind the ring lands , theres not a lot of support , under heavy loads you can have skirt failure. For high cylinder pressures forged will hold up were others won't .
2000ZxT
07-25-2008, 06:11 PM
The SVT pistons hold up to a good amount of detonation. Not brittle.

A magazine editor had a boosted Focus SVT he drove to shit. When they finally tore it apart for a rebuild the pistons was halfway melted and the thing still ran.
CT9A
07-25-2008, 06:46 PM
half melted is not a good thing....and just because he drove it to shit doesn't mean it wasn't well tuned to prevent detonation. John knows what hes talking about. better then stock though
inis
07-25-2008, 06:53 PM
dont grind anything down on them. They're made that way. I wouldn't boost them more then 14 psi if I we're you. Thats if you want reliability.

Also you need a good tune to go with them.
mechtech
07-25-2008, 10:27 PM
Stock rods are sintered, not cast.
They are broken [not machined] at the joint for a perfect, superior mating surface.
2000ZxT
07-25-2008, 11:56 PM
Talking about what Brad showed a picture of is not the issue. The issue is not the 'rough edges'. Flaunting your e-knowledge is not the issue, either, while it is rampid in this thread.

The real issue is that one of the rods had previously spun a bearing.

*shrug*
inis
07-26-2008, 01:24 PM
Talking about what Brad showed a picture of is not the issue. The issue is not the 'rough edges'. Flaunting your e-knowledge is not the issue, either, while it is rampid in this thread.

The real issue is that one of the rods had previously spun a bearing.

*shrug*


I didn't see that mentioned.
2000ZxT
07-26-2008, 01:32 PM
The problem with your rods is that one of them spun a bearing. You should have a machine shop oversize that one and buy the bearing from rockauto that I showed you to match it.
.
Escort Pimp
07-26-2008, 01:36 PM
How do you know it spun a bearing? And who is flaunting e-knowledge? We answered the question HE asked.
2000ZxT
07-26-2008, 01:38 PM
Because I am the one who found him these rods.
inis
07-26-2008, 01:49 PM
Because I am the one who found him these rods.

have you seen these in person?
2000ZxT
07-26-2008, 01:50 PM
Not this set.

SVT rods and pistons yes, I owned a set (out of my SVT engine) till I decided to go with Diamond pistons.
ZX2guy19
07-26-2008, 02:19 PM
It spun a rod. I have them checked by a mechanic.
2000ZxT
07-26-2008, 02:56 PM
It spun a rod? That must have been hell on the poor engine ; )
1turbofocus
08-23-2008, 05:47 AM
These "Fractured" rods cannot be remachined , In the machining process the rod is now bigger (spinning the bearing makes the hole bigger) so to resize them you have to cut the part (fractured area) to make the hole smaller and this cannot be done with these rods and they work correctly again

The SVT Focus Pistons ARE NOT hyperetectic they are a plain cast piston

Tom