should a 6 speed dyno in 5th instead of 4th?
04-29-2010, 10:24 AM
#1
should a 6 speed dyno in 5th instead of 4th?
Ratios (:1)
Automatic Automatic Manual
1st gear 2.563.........3.933
2nd gear 1.552 ........2.478
3rd gear 1.021 ........1.700
4th gear 0.653 .........1.250
5th gear 0.470 .........0.976
6th gear - - 0.771
Reverse 1.846 1.846 4.008
Final Drive Ratio 4.428 4.428 3.286
Automatic Automatic Manual
1st gear 2.563.........3.933
2nd gear 1.552 ........2.478
3rd gear 1.021 ........1.700
4th gear 0.653 .........1.250
5th gear 0.470 .........0.976
6th gear - - 0.771
Reverse 1.846 1.846 4.008
Final Drive Ratio 4.428 4.428 3.286
04-29-2010, 10:57 AM
#3
4th
the dyno shop will know and may run it in a few gears for comparision
phee: I was only poking fun in brake thread-
the dyno shop will know and may run it in a few gears for comparision
phee: I was only poking fun in brake thread-
04-29-2010, 12:58 PM
#4
אני עומד עם ישראל
4th
04-29-2010, 07:02 PM
#6
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^because 5th gear is an overdrive gear. The load you are putting on the engine will not be as accurate as in the lower gears compared to actual load you see on the street.
Plus its a really LONG gear....you'll just be spinning things faster causing your car to work harder to make the power.
Plus its a really LONG gear....you'll just be spinning things faster causing your car to work harder to make the power.
Last edited by flowgoode; 04-29-2010 at 07:04 PM.
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04-30-2010, 06:48 AM
#8
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ok well maybe its not an "overdrive gear" but like I said before it is a long gear, and you'll just be making your car work harder to get the power.
Do the dyno in 5th gear if you want to, see if it makes a difference. Be a guinea pig.
Do the dyno in 5th gear if you want to, see if it makes a difference. Be a guinea pig.
04-30-2010, 07:00 AM
#9
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To be honest, I didn't even look closely at the ratio chart you had up there...I was basing my overdrive gear statement on the T56 transmission I am familiar with that 5th and 6th gears are both overdrive gears and 4th gear is 1:1 ratio.
Like I said...be a guinea pig, see if you can yield better results in 5th than 4th.
Like I said...be a guinea pig, see if you can yield better results in 5th than 4th.
04-30-2010, 07:35 AM
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I always thought that for accurate results, not better results, you should be using the gear closest to 1:1...but I could be off as I'm no professional.
Use quarter mile times to compare your car, dynos are so variable IMHO.
Use quarter mile times to compare your car, dynos are so variable IMHO.
04-30-2010, 12:55 PM
#11
yes close to but not below 1 to 1....
.9 is less than 1 and that is considered overdrive or underdrive depending on where you are from
closest without going under the actual retail price !!
.9 is less than 1 and that is considered overdrive or underdrive depending on where you are from
closest without going under the actual retail price !!
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