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04-02-2006, 12:46 AM
#4
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forget 3k too small 3,500-4,000 is the usual range. 4,000+ is usually used for all out racing/trying to get the best times out of a stock set up. If you look and see posts that are titled "Fastest bolt on car" "Fastest cam only car" threads most go with a 4,200 or a 4,400 to get every last bit of power out of their combo for bragging rights. A 4,400 stall would get you better times in the the 1/4 even on stock setup but the gain would be something to the tune of .10 or so. You have to seriously think of what you want to do with the car. Is it a daily driver or a tack only car. If its a daily driver a 4,400 will cause driving issues(too loose) as well as a good hit to the gas milage and all for what .10 at the track...
04-02-2006, 09:42 AM
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Selection of the right stall speed for your vehicle should be matched to the engines peak torque; engines torque curve, and vehicle weight. In general, the desired stall speed would be 500-700 RPM below the engine RPM at peak torque. The speed allows a margin for application of the torque reserve on takeoff.
When selecting stall speed without having an accurate and precise engine peak torque rating, it is better to conservatively estimate the engine torque than it is to over estimate it. If you over estimate the torque output, the resulting stall speed will be lower than intended and is likely to make the vehicle slow off the line, increasing your ET.
When selecting stall speed without having an accurate and precise engine peak torque rating, it is better to conservatively estimate the engine torque than it is to over estimate it. If you over estimate the torque output, the resulting stall speed will be lower than intended and is likely to make the vehicle slow off the line, increasing your ET.