CLASS RACER FORUM - View Single Post - Have a question for the J througm M cars running small block

James L Miller · 02-16-2018, 01:16 AM

I never thought the center drilling would help much since the moments of inertia are the highest on the outer diameter. Same for strength, it's on the OD. So you save mostly dead weight not so much on the inertia. If I remember correctly, both strength and moment of inertia is the fourth power of diameter.

Maybe you could run an aluminum spool with the 273? Lighten a steel spool and ring gear might be better options. I bought a Mittler Brothers spool with lightening holes in it last year for about $70. They had a sale, so I thought I'd take a chance with them.

02-16-2018, 01:16 AM	#7
James L Miller Member Join Date: Apr 2005 Posts: 494 Likes: 6 Liked 25 Times in 16 Posts	Re: Have a question for the J througm M cars running small b I never thought the center drilling would help much since the moments of inertia are the highest on the outer diameter. Same for strength, it's on the OD. So you save mostly dead weight not so much on the inertia. If I remember correctly, both strength and moment of inertia is the fourth power of diameter. Maybe you could run an aluminum spool with the 273? Lighten a steel spool and ring gear might be better options. I bought a Mittler Brothers spool with lightening holes in it last year for about $70. They had a sale, so I thought I'd take a chance with them. __________________ Mopar 2 Ya!