Rod weights

House of Darts · 01-03-2019, 11:35 AM

Anyone know where I can find SB mopar factory rod weights? I thought that the Eagle SIR rod was legal for SB. Only CAT for stock?

Myron Piatek · 01-03-2019, 01:09 PM

Log in and look up the specs for the engine you need. http://www.classracerinfo.com/
All the approved Mopar small block rods seem the same, even for a 273. SIR isn't legal and is lighter than the 755g minimum anyway. But I think they weigh the rod, piston, rings & bearings as an assembly with the minimum weights added together.

Eagle H-beam is probably the most common. Can't one polish down OEM rods to save weight? Lighter 273/318 & the standard 318/340/360 rods?

dartman · 01-03-2019, 01:59 PM

http://promod.nhra.com/userfiles/fil...edProducts.pdf

rod weight is 655 on page 15 and 16

there is only one accepted rod crs-6123 page 38

House of Darts · 01-03-2019, 02:57 PM

I've looked at those specs for some time now and never saw it. Always went directly to superseded part weight. Aren't the factory 318 rods post 1976... lighter and stronger than the older ones? I also thought that the later 318 internally balanced cast cranks lighter and stronger?

01-03-2019, 11:35 AM	#1
House of Darts Member Join Date: Mar 2007 Posts: 346 Likes: 19 Liked 20 Times in 15 Posts	Rod weights Anyone know where I can find SB mopar factory rod weights? I thought that the Eagle SIR rod was legal for SB. Only CAT for stock?

01-03-2019, 01:09 PM	#2
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,538 Likes: 34 Liked 132 Times in 48 Posts	Re: Rod weights Log in and look up the specs for the engine you need. http://www.classracerinfo.com/ All the approved Mopar small block rods seem the same, even for a 273. SIR isn't legal and is lighter than the 755g minimum anyway. But I think they weigh the rod, piston, rings & bearings as an assembly with the minimum weights added together. Eagle H-beam is probably the most common. Can't one polish down OEM rods to save weight? Lighter 273/318 & the standard 318/340/360 rods? __________________ LOCOMOTION Racing

01-03-2019, 01:59 PM	#3
dartman Member Join Date: Oct 2005 Location: N.S. CANADA Posts: 498 Likes: 155 Liked 68 Times in 41 Posts	Re: Rod weights http://promod.nhra.com/userfiles/fil...edProducts.pdf rod weight is 655 on page 15 and 16 there is only one accepted rod crs-6123 page 38 __________________ 1231 FS/D Drag Pak 1231 E/SA 71 Demon Kelly MacKay Last edited by dartman; 01-03-2019 at 03:17 PM.

01-03-2019, 02:57 PM	#4
House of Darts Member Join Date: Mar 2007 Posts: 346 Likes: 19 Liked 20 Times in 15 Posts	Re: Rod weights I've looked at those specs for some time now and never saw it. Always went directly to superseded part weight. Aren't the factory 318 rods post 1976... lighter and stronger than the older ones? I also thought that the later 318 internally balanced cast cranks lighter and stronger?