OK guys my setup in my sig is good for about 400-415hp and I am wanting to add a 125 shot to this. My 350 has an overbore of .040" with 4 bolt mains. I will be adding an eagle crankshaft with eagle rods as well. WHat I need to know is are the any GOOD forged pistons that will take a 125shot for say around $400??? If there is can you direct me to them.Thanks

 

A cast piston will handle a 125 hp shot with no problem.

Don't need to over build.

You will need t ensure that you feed it a steady supply of fuel. (enough volume at the rated pressure) at 10.3:1 I'd recomend 94 octane pump gas.
You must avoid detonation while using Nitrous. It eats pistons wether cast or forged.
retard the timing about 4 degrees.
Use a spark plug about 2 heat ranges cooler.
a forged piston will just withstand the detonation a little longer.

Concentrate on the fuel side of your nitrous system and you'll be fine with cast pistons at 125hp.

 

i had the motor rebuilt about 4 months ago with HYPER PISTONS. But thanks for the info

 

a forged piston will warp and deform if you have detonation, a hyper piston will fracture/break. just listen to what fbird said and you'll be good.

 

Hyper pistons are the same as a cast piston only stronger.
more silicon content. they are not "brittle" just harder.

You can spend $1000's on forged this and forged that and still scatter it. Or you can spend about $150 doing the fuel system right the first time and sleep at night.

they only thing critical on hypers is the top ring gap. with nitrous bigger is better.

 

OK thanks F bird'88 As for the stock bottem end will it handle around 420hp total horsepower plus 125 with NOS

 

yes just go easy on the timing and feed it lots of high octane fuel.

if you want to get much beyond a 200hp shot then you need to get into the race bottom end.

 

Nah I think I will stay between 100-125 shot. F-bird'88 I appreciate all the help:yourock: