rear gear for t56 magnum wide ratio
 

Wondering what gear you guys with the t56s(2.97 first- fifth .74 and sixth .5 OD) are running? do you think 3.90s are to much. mostly street some road course, ls7 katech cam. like to hear your ideas? Thanks Rich

Hey Rich! Rupp is running a Viper T56 (or was last I checked) that probably has a similar gear ratios w 3.89s. That car's a little zippy :lol:

I'm running the closer ratio (2.66 first/.62 sixth) and 3.70s on my LS7. Not on the road yet, but I think sixth will be mostly useless below 80 on 26" rear tires.

Edit: There's a number of calculators out there:
http://www.5speedtransmissions.com/gear_calculator.html

Thanks Ron- Im thinking I might have a better chance of using 6th with the 3.90s. With the tko600 I have 2.87 first gear and the 3.90s feel real good and it moves out quick. I figure 2.97 isn't much more.

In my last car, I had the same engine, cam, trans, and a 3.70 rear. I loved it. At 70mph, I turned 1650rpm and could drive in 6th all the way down to 1200rpm.

Really it comes down to the overall intent of the car. Mine was mostly street driven and I really liked the combo. My previous car had a LS1 with a maggie on it with 4.10's and the .5 t56. I had 410 ft/lbs at 2000rpm and I liked that setup also.

With these cars, it really comes down to getting a really good tune, after that, they like almost any gear you put in it!

I have the T56 with 2.97-1st and .50-6th gear and I run 4.11 with 295/35-18's out bact. On the freeway cruising around 80 mph it's at +-2,100 rpms.

At the autocrosses it seems to be fine for most of the tracks.