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Author Topic:   How do I determine how light of a rod to use?
posted September 26, 2003 04:19 PM
I am going to be using a crank that has a bob weight of 1600g, pistons that weigh around 450g and rod journals that are 2.0. How can I determine what weight the rod should be to get this assembly to balance easily? By looking in several different catalogs, my choices seem to be anywhere from 600g (big$$$) to 690g (less$$$).

Can anyone help?

posted September 26, 2003 05:32 PM
If your using a crank that is designed for a 1600 gram bob weight , then you will need the lighter rods .


Hendren Racing Engines
Rutherfordton , NC

posted September 26, 2003 10:15 PM
560g from competition products.

4340 i beam

430.00 cant beat that

xx RACER 96
posted September 27, 2003 02:29 AM
I think hes wanting to be close to 1600 bobweight..

which will be hard with those pistons they are pretty heavy probably going to end up low 1700.

posted September 30, 2003 11:25 AM
Does anyone know anything about RPM rods? Are they good rods? I have heard that CAT rods aren't worth a darn. I ask because Comp Products has 6.0 581g rods and I thought about using them.

Any thoughts?

posted September 30, 2003 04:11 PM
are you talking the 429 ones if so I had them they are really nice..

posted September 30, 2003 04:53 PM
Yeah, that's them. The $429 ones. How many races do you suppose you have on them?

posted September 30, 2003 09:24 PM
100 lap mains at least 25. though I dont see any relevance to how many races I have on them.
I may run diff rpm, less or more compression, lighter pistons, perfect timing, a oil cooler etc.

they are made in usa 4340 and really nice and only 430 bucks.

posted September 30, 2003 10:06 PM
I have a set of carrillo h beam 6" rods. small journal, force pin oiling, carr bolts. These rods have dyno time on them only and not used winston cup stuff.

the rods weigh 545 grams


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