How much can the stock rods take if going with 10:25/1 cr should I replace them and if so with what?

 

IMO, stck rods are fine to 6,000 rpm and 400 HP. Unless you have a big cam and head work, you should be OK. Just recondition them, replace the bolts, and loosen up the clearance to .0020-.0025. Balance the rotating assembly, too. Very few aftermarket options.

 

I have a 280h cam sp flat tops 7a heads 2.02 1.60 valves 7111 intake 200r4 with 3:73s I'm trying to get this combo togather ind can't find much in the way of rods without donating a kidney and having them made. Will they hold up in this combo?

 

From what I've read,all olds rods are forged...but they are soft.
I would invest in a new set...


http://www.amazon.com/Eagle-Specialt.../dp/B002R66G4E

 

Those are big block rods. Stock rods for this application are fine. Use a light piston and they're even better.

 

I used stock rods in quite a few of my builds. They were winged to 6200 all the time. I sold a few sets of rods to local mud packers in my area a few years back. The hot set up was run 6" Olds rods in their SBCs and used a .030 under bearing and I assume a bushed small end. Because the Olds rods were stronger than the Chubby's and got a 6" rod for a 5.7".

 

Rolds72 your set up is identical to mine minus the trans. I runa th400. The stock stuff has held for me great even the used cast flat tops.

 

Seems like whenever we try to build something other than a Chevy,we pay out the nose.
Sorry about the above recommendation..ebay lists the 6.7 rod for both the 350 and 455,...I now realize the 350 uses a 6 inch rod.
If you start buying custom rods and pistons,and turning the crank...your better off just going with a 455...more options.
I chose to keep my bottom end stock and just go with a big cam and have some fun.
I have all summer off and I'm going racing...I'm gonna see just how much abuse my 35 year old motor can take.

 

mondello offers small block rods, $499...

i've often wondered about cryo treating rods, i wonder if that would toughen them up?

 

I have a 362 Olds and love my SBO.
Enclosed is a pic of a set of Mondello MR710 rods that have polished beams, shot peened with good bolts for pressed pins.
Next to the MR710 is Mondello's new 6" olds I beam rod good for 850 hp, floating pins.
I searched high and low and those are your only options for a direct fit replacement rod without cutting your crank or using crazy Chebby pistons.
The MR 710 rods are for sale if your interested.

 

Sorry there is no pic as promised.
I guess I am still a newbie here and can not post yet.
There is a pic on Mondello's home page of the new 6" rods.
They are the same price as their MR710 rods $499.

 

Well a few years ago I bought a set of 6" rods from Mondildo, trying to save time. Had to replace 5 bolts, resize two rods and one my machinest couldn't save and had to redo one of the old rods. That is the last thing I will ever buy from them.

 

My buddies have competition rock crawlers and everything is cryoed it does work and it's fairly inexpensive he's had the same third member for 6 years and hasn't come apart yet!!!

 

"I" beam rods good to 850 HP? Really?? For $500?

 

You can also take the stock rods and polish the beams and have them shot peened, that helps a lot. IMHO with the build you have I wouldn't worry.