If that's with labor, that's the going rate here in Chicago. It's kinda a PITA to put heavy metal in right. S/F....Ken M

Thats the price I paid installed... had 3 chunks
put in.. always from the sides

I put a 440 crank in a 383 25 years ago. I had the counters turned down to clear the pistons and the block. I used beam polished 383 rods and modified TRW pistons. This was before cheap stroker kits were on the market.

I cut .175" off the top of the piston and trimmed the bottom of the pin bosses. It shaved about 200 grams off each piston.

The TRW l2315f-30 slug still had well over .2" of material in the center and thickened up considerably as you moved out towards the ring lands. In fact, the centering hole in the middle of the head on the forging used to mount the piston on the lathe was still visible.

The crank took at least six slugs of mallory and over $1k to finish and balance.

Just sayin' save a little on the pistons and rods now may cost you more in the long run when it's time to balance.

...

That shows a 1.5 compression height, THe pistons diamond makes, and the one I listed is wrong.

I posted the wrong number before....

Fits: Big Block, 383 w/440 Rod

Bore (in): 4.280

Stroke (in): 3.750

Rod Length (in): 6.768

Piston Material: Forged aluminum

Piston Style: Flat Top

Compression Distance (in): 1.320

Dish Volume (cc): -4.0

Pin: .990 x 2.930

Piston Ring Grooves: 1/16" x 1/16" x 3/16"

Quantity: Sold as a set of 8

that puts me at .025 in the hole

I have to do the math , it shouldn't be that deep , have you had the block squared yet ? If not do it FIRST , order piston in the bore size you need and tweak the CH

The block is at the shop waiting on pistons. He is squaring the block, and also checking counter weight clearance. Some take shaving and some don't I guess so he is checking that as well.

I repeat: Complaining about 20 grams in an engine that came stock with piston/pin assemblies that were over 1000 grams is hilarious.

Yes I know the generally accepted balancing formula for V8s. Take 40 grams off the piston/pin and the 20 grams goes away, IF the extra weight is concentrated at the big end. If it's the result of a slightly heavier than stock rod beam then it'll be less than 20 grams. Lightening the rod journal would be my fix, like Chrysler did on the 340.

Suggesting someone will need Mallory because of an extra 20 grams in connecting rod weight is pure and simple "putting up a straw man to knock it down". That doesn't fly at the debate club and not here, either.

R.

As for the Chinese lying about metal composition, if they are indeed trying to do that, it's why we aren't buying directly from them. The middlemen, i.e. the Eagles, Scats, 440Sources, RPMs, Hughes, etc are doing the due diligence. They have to keep tabs on the product or else go out of business. That shouldn't be too hard to understand.

My block is decked, and he went to a 9.865, and with the piston we decided on that puts me .0010 in the hole.

So Im pretty good with that.

9.865 most likely a typo
9.965?

nope. He took .015 off one side and .018 off the other side.

For your sake I hope its not 9.865

why? it comes out to .010 in the hole.

Because 9.865 is .115 short of blueprint deck height (9.98)

IDK I just know what he told me, and the block had factory stamps on it, so I don't think its been super decked. Ill call him Monday to double check.

Aren't you an engineering professor? A data driven field where ASSumptions can yield catastrophic results?
How do you know what bobweight his current crank was balanced at?
Yes the rod is 20 grams heavier total, it also has a .104 smaller wrist pin bore, who is to say the rod is not 85 grams heavier than a stock rod on the big end?
My point is no one in this thread has the data to determine if the crank will balance out fine or need mallory and no need to call in the debate team

For reference. I'm putting a 452 together right now using a factory 3.75 440 crank. Because I have parts laying about. I took .120 off the counterweights with a lathe, and still had to heavily bevel the edges and grind the block for clearance.

Using a 1.12 CH Icon piston(IC827-granted, super light) and a Manley 6.965 hemi rod(heavy thing like 960 gms IIRC), the bobweight is just over 2320grams, I have to take over 180 gms off the crank on both ends still.

A 1.200 inch piece(what commonly fits in BB cranks) of 1 inch diameter Mallory adds something like 120gms gain to a crank. I'm at home of else I'd actually look. 6 pieces is roughly +300gms on either end. I find that incredibly hard to believe on a wedge build...any wedge build.

I think you got sodomized by the guy balancing that crank, or maybe they went crazy when turning the CW's. S/F....Ken M

I think you got sodomized by the guy balancing that crank, or maybe they went crazy when turning the CW's. S/F....Ken M

Probably both. I counted the sticks. Never again. I was just a wee pup back then and didn't know no better. I be a whittle smarter now.

We figured were gonna have to take .150 to clear. I sure hope cause Im having a hard time finding a machinist who wants to do it. They all seem scared to make the cut. I told them all its no big deal, I wish I had a lathe good enough cause I would do it myself but the one I have access to is way to outa spec and would sing like a canary if I chucked it up.