carbuff
12-07-2010, 03:14 PM
I am going to run a T56 Magnum behind my 402ci LS2 engine, and I'm trying to decide which rear gear I want to use. I'll be using the 2.66 1st gear / 0.62 6th gear Magnum.
My primary interest in selecting my rear gear is performance on the road course during HPDE's and possibly an occasional autox. I was planning to run the 3.89's, but with the closer ratios of the 2.66 1st gear Magnum, I'm leaning more towards the 4.11's.
My last T56 experience with a 2.97 1st gear, 0.50 6th gear, and I ran that one with 4.56's. Of course, that engine was designed to spin decidedly higher rpms than this one. :) This engine was built to peak around 6200-6300, so I won't spin it much past 6500. And I'll be using either a 315/30/18 or a 335/30/18 rear tire which comes out to about a 25" or 26" diameter tire...
Any thoughts are welcome... I know several people here are running similar setups, so I'd love to hear about your combination and your thoughts on your gear selection.
My primary interest in selecting my rear gear is performance on the road course during HPDE's and possibly an occasional autox. I was planning to run the 3.89's, but with the closer ratios of the 2.66 1st gear Magnum, I'm leaning more towards the 4.11's.
My last T56 experience with a 2.97 1st gear, 0.50 6th gear, and I ran that one with 4.56's. Of course, that engine was designed to spin decidedly higher rpms than this one. :) This engine was built to peak around 6200-6300, so I won't spin it much past 6500. And I'll be using either a 315/30/18 or a 335/30/18 rear tire which comes out to about a 25" or 26" diameter tire...
Any thoughts are welcome... I know several people here are running similar setups, so I'd love to hear about your combination and your thoughts on your gear selection.