need help with gear ratios, stock final gear ratio's not spaced out evenly - why? |
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need help with gear ratios, stock final gear ratio's not spaced out evenly - why? |
jimkelly |
Jun 22 2011, 04:13 PM
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#1
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
for me - chevy v8 - stock 2nd is fine as a first gear, but it winds out fast, as does stock 3rd, as does stock 4th, and 5th is fine, but taller would get rev's down for highway cruise-ing ( 3000 rpm at 65 +- ) on 195x60x15 tires.
my question is why are stock final ratio's not spaced out evenly? stock 3.091 1.889 1.261 0.926 0.710 3.091 x .61 = 1.889 1.889 x .66 = 1.261 1.261 x .68 = .926 0.926 x .77 = .710 evenly would be ... 3.091 2.496 1.901 1.306 0.710 for my v8, i am thinking of course to delete cantilevered first - thus i can use a beat up slider ; ) stock 2nd 1.889 ?? 3rd - i need the right gear for inbetween stock 1.889 and 0.710 4th - use stock 5th ZD 0.710 5th - use flipped H 0.59 as an overdrive gear. how the hell do i calculate the correct final gear ratio for my 3rd gear? looks like an R (1.080) 25:27 - or - a flipped V 27:25 - is about right ?? jim Attached thumbnail(s) |
jimkelly |
Jun 23 2011, 05:45 AM
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#2
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
i have an H gear - so i only need to determine the best 3rd - to fall between F and ZD - so that i would have a 3 spd plus overdrive : )
or i could try to make a 4spd with the correct 3rd and 4th to fit between F and flipped H. but this is more money as i would likely have to buy 2 gear sets. doc - i think a flipped V might be right - pls let me know what you think. at some point - i will need two transes built this way. thanks! jim |
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