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Old 02-27-2004, 08:17 PM
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Optimum gear ratio

Chevelle 3400lbs
406 sbc 470HP 470lbs torque
TH350 automatic
26-27 inch tall tires

I would like to keep the RPM’s around 5500, but get down the ¼ mile as quick as I can.
I am thinking 3.55 or 3.73 gears will get me to the end of the ¼ mile in about 12 seconds, at about 120 MPH and keep my RPM’s where I want them, does this sound correct???

Any and all opinions are welcome.

406chevelle

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Old 02-27-2004, 08:25 PM
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I would go with the 3.73's. I consider that an ideal street and strip gear. Do you plan on doing a lot of street or highway driving? If so the small amount of track time you lose with the 3.55's could be worth the lower cruising rpm. Either way you going to be running in the 12's.

Whats stall speed are have you got?

Mike
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Old 02-27-2004, 08:38 PM
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I will be driving a bit on the street probably not at all on the highway, and at the track every chance I get.

I do not have a stall converter yet, but thinking a 2400 stall.

406chevelle
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Old 02-27-2004, 08:45 PM
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Do you know what your power band on your cam is?
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Old 02-27-2004, 09:12 PM
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Comp Cam XE274H-10

Power band is 2000-5500 RPM

406chevelle
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Old 02-29-2004, 08:24 AM
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For the best track time and still being easily streetable get the 3.73 gears, that will help out the TH350's high first gear, but consider a 2800 stall speed, it will still be very streetable with the 3.73s because of the higher cruising rpm.

second

I know you don't plan on using this as a mostly street car but I put this in here just incase you change your mind. You could go with 3.55's you could still run the 2800 stall, but you'd probably be happier with 3.55's and 2600 or 2400.

Some may disagree about what stall speed can be driven on the street for long periods of time, and you probably could get away with a 3000-3200 stall speed with the 3.73's, but I don't think you'll need it.

Hope this helps

Mike
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Old 02-29-2004, 08:13 PM
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Ghetto Jet I appreciate the responses.

I am leaning towards the 3.73 gears, and have been considering a bigger stall, your comment about more stall sounds good, but I wouldn’t good any more than 2800.

406chevelle
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