Help me pick the right pistons. 78 440

Went to freshen up my 1978 440 before slapping on the new trick flow heads and found a cracked ring land. Engine builder has retired and pistons don't have part numbers stamped, so might as well do a set. Current set up with stock heads and cast crank was supposed to have a 9.5 CR (bore:4.350, stroke: 3.75, chamber volume: 92 cc, deck height: 0.10, comp height: 1.988, weight: 860 g, weight with pin: 1122 g). Biggest change will be the 78 cc chamber on the TF heads. My understanding is the aluminum heads would handle the higher comp ratio if I stuck to the same size piston. So hypereutectic or forged? How close to weight do I have to get? For example I found a forged set that weighs 1072 grams with pin. Thanks guys

The Sealed Power 2355's would be a good place to start. Small valve reliefs, though....

Your old compression ratio was closer to 8.5:1

A 2.06" CD piston with 5 cc valve relief will be 10.3:1 with your TFs.

You'll need to get the weight closer than that.

The 2355 is your best shot at getting the weight right. Everything else will be too light, unless you're willing to rebalance.

You're right. I ran those number through a CR calculator and I don't know how he thought it came to 9.5! Valve relief would be a good idea, and 10.3 would be a good number to shoot for.

you might get a 10.3 number with Icon 836's and take some weight off.

my first look would be the SRP pistons, are you trying to get away without rebalancing?

http://www.jepistons.com/Catalogs/SRP/Mopar/400-440_flat.aspx

Local shop that can balance is back up weeks, if not months. Finding a set that balances would save some headache. Thanks

I'm a fan of Racetec/Autotec... they will build anything you want at good prices...2618 or 4032. All forged.

Lighter pistons are better than heavier and I think I read that 10 grams +/- would work but all have to be equal weight.The crank should have a balance weight mark on it saying what weight.

Especially if you're putting decent heads on it later, just bite the bullet now and get modern pistons and a rebalance.

I like the Icon stuff for reasonably priced pistons. You can lose over 200 gms per piston over the stock junk; that alone will be like a new engine, and the bearings and block will thank you. S/F....Ken M

Call Glen at Icon pistons, 1-800-648-7970. ext. 159. Icon----United Engine & Machine has been making pistons since 1923.