[Johnny406]

Some of you may recall that I had a bit of misfortune a few weeks ago when I started assembling my new 428 build. I was using some old Venolia supercharger pistons and I had them balanced along with my 990 forged crank and Eagle ESP rods. When assembling it, I discovered that my pistons were a good .047 in the hole. In the end, I decided it was better to order new pistons over milling the block.

With that said, I spoke with the real nice folks at Race Tec pistons and they offered to make me a custom set with a higher compression height, .990 pin and standard (not metric) ring grooves.

The pistons showed up today and they are certainly beautiful. The problem is that they are substantially lighter than the estimate as they were "supposto" be within 5 grams of the current pistons. Though I knew the pins would be lighter because they are the 2.500 length over the 3.00 of the Venolia pistons, I was told that as long as I could get the piston, pin, ring combo within 15-20 grams, I wouldn't need to get my assembly rebalanced.

The Race Tec pistons are 37 grams lighter than the Venolia 528/566
The Race Tec pins are 46 grams lighter 128/174

It's 83-84 grams lighter would be great if I hadn't already spent the $250 to get it balanced.

Though I hope I'm wrong, I really see no other choice than to re-balance it again, correct?