Ive decided to go with an Eagle Rotating assembly but can't decide on whether to get H beam or I beam rods. Which one is stronger? This isn't a high HP setup that I'll be running. I'll be shooting for 400 on motor but planing to run a 150+ shot.

 

400HP on motor is nothing. Go with the i-beams. FWIW I'm putting out close to 575fwhp with Scat forged i-beams. H-beams are stronger but more expensive. Some of them also require more clearancing.

 

Should I even mess with getting different than stock spec pistons? I'd like to raise the CR to 11:1, or should I just get the heads worked?

 

Alright, I've decided to build a 355 that is stock spec but forged pistons and rods. Thanks for the input on rods man.

 

Don't forget it's not just the pistons that affect compression. Combustion chamber volume, deck height, and gasket thickness all play a part.

If you bore the cylinders (recommended) you're going to need oversized pistons anyway, so you might as well upgrade to a forged slug.

DEFINITELY DEFINITELY DEFINITELY get the heads ported (I recommend AI if you can afford it). That's where your power will be made along with a match spec'd cam.

11:1 is nice, but you can easily go a full point higher without a problem. 11.8:1 is a nice compression for a street motor.

 

Be careful as to which eagle I beam it comes with!!! But, The Scat pro I beam with 7/16 arp capscrews is the strong one.

 

Could you kindly post a part number please?

 

part number for which one? The scat number is 2-ICR6000-7/16

 

i would probably trust a set of factory powder rods over the china stuff. same goes for the crank. it has worked well for me so far.

 

I will do H/C and a 150 shot. What about pistons? Should I get forged aluminum or OE. Also, if I did go back with OE crank and rods I should replace everything with ARP bolts right?

 

balancing with arp rod bolts would be good to do. for pistons, you could run stockers or a lightweight forged piston. dont put some heavy ******* in there, and you dont need "nitrous pistons" for a 150 shot.
put it together correctly and dont spin the doo-doo out of it.

 

Well, what would it take to safely spin it past like 6000rpm? I just want some extra security.

 

a billet crank, carrillo rods, and some BME pistons would add some security above 6000 rpms.

 

Thanks for all the help guys. I've decided to keep the stock crank and just upgrade the rods pistons and bolts. Thanks for all the input.