[HWYSTR455]

I'm not sure what cam you're running, but if it's a drag car, I would agree 3.00s are no where near steep enough. You're going to want somewhat of a tall tire for a better contact patch especially with big power, so I would think you want something like 4.11, 4.33, 4.56, or maybe even bigger.

With a 7500 rpm, 29" tire, 3.73s, and a .75 OD, you're at a top speed of around 235mph.

4.11 = 210mph
4.33 = 200mph
4.56 = 190mph

Figure out what your power band is, peak RPM, and tire height is before you decide on a gear.

With a tall soft-sidewall tire, anything over 160 is a handful. 200 and you have to have a chute. It's a rule, but you need it to help keep you straight as you slow down too.

When I was doing my 2nd gen boosted build for ECTA and standing mile, I did calculations on 7200-7500 rpm, 3.25 rear, .82 OD, with a 26" tire. I didn't care about 1/4 mile, and knew it would just blow the tire off if I tried, but my calculated top speeds were in the 220 mph range. My goal was the 200mph club.

If you're over 1200hp, I hope your trans is fully built, and if you plan on lockup under full throttle, you need a stout converter, like a 3 disc billet unit.

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