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Post by warrick on Dec 12, 2012 13:39:46 GMT -5
When dad ran his 40 Chevy he used a three speed truck transmission. He would leave the line in second gear and just shifted in to high gear I have been told, i can remember it leaving packing the front wheels off the line and winning his fair share of races. I was young and don't care much about tech things just I was having time of my life at the strip. Dad has passed on about ten years ago so i cant find out what gear his was running under it to be able to do that. Anyone know just how low of a gear one would have to go to make it work.
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Post by 1946austin on Dec 13, 2012 11:35:13 GMT -5
Depends on the engine and tire he was running. I'd guess most well built SBC would be built to spin 7,000 or maybe more, and with a 28"-30" rear tire they would run something in the 4.86 to 5.13 range with a 2 speed trans. 2nd gear ratios will require something low geared, but you don't want to run out of rpm's before tripping the lights at the end of the 1/4 mile.
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Post by warrick on Dec 13, 2012 23:36:16 GMT -5
I have found out that the second gear in most inline 6s 3 speeds of that time ran around 1.86 and most V8s 3 speeds were a little higher, and that mom said she know that the engine was a 30 over 283 fuel injected with a mag.{her job was shoot fuel in injectors and crank the mag back until it fired then crank it back against the stop that dad made and tighten the wing nut.}thinking about trying it in my car to see if i can get close .As a friend said whats the worst that could happen blow some thing up. I have a 4.56 on the shelf.
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