13qtr

Only thing I've found is 125 grams...is this right. Short story...I had a stroker built....I asked for internal balanced engine. After installing a neutral flywheel it shakes. Called builder and they said they balanced it to stock lt1 specs. My flywheel came with a bolt on weight. Before all of this I had it checked..the shop had to take off 6 grams and got it to within 0.61 grams..without the weight. I just checked the bolt on weight and it's bolts..it comes to 185 grams.
Last year for curiosity, I had 3 flywheels checked. A fidanza came out to 81.32 and 2 cast advance brands came out to 92.91 and 92.90.
So what is correct?