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Wallace Racing - Starting Line Ratio Calculator
http://www.wallaceracing.com/calc-slr.php
A 9-10-11 range SLR is desirable. The SLR of New Tire is what the SLR would be if. taking the different tire diameter were taken into account. (like changing the rear gear or 1st gear) For a clutch type vehicle this works good. Some racing automatics, the torque converter has an effect on the ratio.
Starting line ratio | Yellow Bullet Forums
https://www.yellowbullet.com/threads/starting-line-ratio.2114186/
In a 3 speed automatic you can usually only choose 1st and 2nd gear ratio, often they are locked together (cant mix and match) so you need to balance starting line ratio with shift drop rpm. In my experience engines with larger power curves are less sensitive to the 1-2 drop then narrow power band pieces.
Drag Racing Traction: Making a Pass - CarTechBooks
https://www.cartechbooks.com/blogs/techtips/drag-racing-traction-making-a-pass/
Starting-Line Ratio = First-Gear Ratio x Rear-Axle Gear Ratio For example, if your car’s trans-mission has a 2.48:1 first-gear ratio and a 4.10:1 rear-axle gear ratio, the starting-line ratio is 10.168:1. How do you correct your start-ing-line ratio? First, it is not impossible to make the above scenario work, but to do so you have to some-how remove power from the car at the starting …
Drag race timing system - Lsleds
https://lsleds.com/drag-race-timing-system/
What is a good starting line ratio? If you have a 3,000-pound car with a 3.50-inch crankshaft stroke, the ideal starting-line ratio is 8. Your car’s starting-line ratio is too high, and will likely cause problems. The car won’t be consistent. How do you read a time slip in drag racing? How is reaction time measured in drag racing?
Drag Racing Traction: Suggestions for a More Consistent …
https://www.musclecardiy.com/performance/drag-racing-traction-suggestions-for-a-more-consistent-and-winning-car/
However, when we take my first-gear ratio of 2.48:1 and multiply it by the rear-end ratio of 4.10, we get 10.17:1 for a starting-line ratio. To correct the situation, I can change the rear-end gear ratio to something around 3.59:1 since 8.9 ÷ 2.48 = 3.59.
Starting Line Ratio - The BangShift.com Forums
https://bangshift.com/forum/forum/bangshift/unofficial-hot-rod-drag-week-board/937401-starting-line-ratio/page2
These are two pages from Dick Miller's How to Hook and Launch. Starting Line Ratio based on stroke and weight and yields the recommended SLR. The second shows ideal 60 ft. times vs. ET. This is a measure of efficiency. Drag Week 2006 & 2012 - Winner Street Race Big Block Naturally Aspirated - R/U 2007 Broke DW '05 and Drag Weekend '15 ...
Starting Line / Launch Ratio based on what tire size? - Hot Rod …
https://www.hotrodders.com/threads/starting-line-launch-ratio-based-on-what-tire-size.431442/
Those are basic guide line numbers to start with on SLR. Many variables as mentioned. 1/8 mile or 1/4 mile. HP of the engine, weight, tire size (width and height), radial , slick A racer , I have been working on his powerglide, runs a 1.69 first gear in the glide. 3.70 rear end gear. Tire size I do not know, it is a big drag slick. SLR is around 6.25
Starting Line Ratio - The BangShift.com Forums
https://bangshift.com/forum/forum/bangshift/unofficial-hot-rod-drag-week-board/937401-starting-line-ratio
Well, calculating it is easy, (1st gear ratio x rear end ratio), but what is a good ball park number to shoot for? I have read that the 9-10 range might be about right, but idk. C6 1st gear = 2.46. Diff ratio = 3.55. SLR = 8.73. Thinking of going to a …
Drag Performance Calculator - Assassin Racing
https://assassinracing.com/tech/drag_calc.html
Drag Performance CalculatorBy AssassinRacing.com. Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches.
Starting line calculator vs trap rpm - Don Terrill’s Speed-Talk
https://www.speed-talk.com/forum/viewtopic.php?t=50814
Re: Starting line calculator vs trap rpm. Post. by John Wallace » Sat Sep 02, 2017 9:23 pm. If you are geared to cross the finish line at your RPM you want, don't change it. If the SLR is high, you need to change the 1st gear ratio as said. Generally this would make for spinning or inconsistent short times.
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