looking at the installed rods - tech question.
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
looking at the installed rods - tech question.
I don't know how to explain in simple words...
I try...
Which side of the rods should be near the counterweight of the crank and wich side near the adjacent rod?
I'm speaking of the big end of the rod linked to the crank journal.
Yesterday i was under the engine with the pan removed.
I noticed that looking at the bottom side of the rods , these rods (eagle SIR 'I' beam) are not symmetrical.
One side (the one near the counterweight or the one near the other rod ..I don't remember I'll check this evening) has more meat. ...It's more thick. You can see by eye.
So now the question is: " Which side of the rods should be near the counterweight of the crank (the thick or the tinner?..) and which side near the adjacent rod?
Thanks
-Beppe-
I try...
Which side of the rods should be near the counterweight of the crank and wich side near the adjacent rod?
I'm speaking of the big end of the rod linked to the crank journal.
Yesterday i was under the engine with the pan removed.
I noticed that looking at the bottom side of the rods , these rods (eagle SIR 'I' beam) are not symmetrical.
One side (the one near the counterweight or the one near the other rod ..I don't remember I'll check this evening) has more meat. ...It's more thick. You can see by eye.
So now the question is: " Which side of the rods should be near the counterweight of the crank (the thick or the tinner?..) and which side near the adjacent rod?
Thanks
-Beppe-
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
It is hard to tell from your description. If there is an oil squirt hole, it goes to the in (cam) side. If the bore that the rod bearing fits into has a larger chamfer on one side than the other, the larger chamfer goes toward the outside (crank counter weight). Larger, flatter, cheeks make for a better thrust surface and should face each other, rod to rod. In case of multiple conditions, I've listed them in the order of importance. I would contact Eagle if you have any doubt.
RACE ON!!!
RACE ON!!!
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Originally Posted by CFI-EFI
It is hard to tell from your description. If there is an oil squirt hole, it goes to the in (cam) side. If the bore that the rod bearing fits into has a larger chamfer on one side than the other, the larger chamfer goes toward the outside (crank counter weight). Larger, flatter, cheeks make for a better thrust surface and should face each other, rod to rod. In case of multiple conditions, I've listed them in the order of importance. I would contact Eagle if you have any doubt.
RACE ON!!!
RACE ON!!!
I never received a reply from Eagle, and I don't expect to recive it for this ...
This evening I'll check again uder the engine.
It seems that this NOT SYMMETRY can lead to a "not centered" piston in the bore so i think it's impossible to do it in the wrong way...
...mmmm I said a stupid thing... the rods are floating pin style... so there is the possibility that the axle of the rod is not in the center of the 4.030 bore... and that the force applied is not in the center of the wrist pin...
-Beppe-
Burning Brakes
Joined: Jun 2005
Posts: 1,191
Likes: 15
From: Wallingford Vermont
Just read this last night. Chamfered side to the crank cheek.
http://popularhotrodding.com/enginem...tallation.html
http://popularhotrodding.com/enginem...tallation.html
