OverDrive, What gears are you running and How do you like it?
#1
OverDrive, What gears are you running and How do you like it?
Im running a 4L60E and 411 gears with 29in tall tires.
Down low im going to need track bite and slicks to hook.
On the freeway its not horrible, but id like it to be a little more calm. (Lower RPMS)
Im thinking of 373s, I know Trev is running 330s, how do you like those?
Down low im going to need track bite and slicks to hook.
On the freeway its not horrible, but id like it to be a little more calm. (Lower RPMS)
Im thinking of 373s, I know Trev is running 330s, how do you like those?
#2
I don't have things running yet but with the lentech I am planning on and the .67 overdrive gear with 4.10's and 275/60r15's on the back of my 68 Nova I should be about as seen below (depending on torque converter slippage):
50MPH ~1650
60MPH ~2000
70MPH ~2310
80MPH ~2640
90MPH ~2970
100MPH ~3300
Bruce
50MPH ~1650
60MPH ~2000
70MPH ~2310
80MPH ~2640
90MPH ~2970
100MPH ~3300
Bruce
#3
I don't have things running yet but with the lentech I am planning on and the .67 overdrive gear with 4.10's and 275/60r15's on the back of my 68 Nova I should be about as seen below (depending on torque converter slippage):
50MPH ~1650
60MPH ~2000
70MPH ~2310
80MPH ~2640
90MPH ~2970
100MPH ~3300
Bruce
50MPH ~1650
60MPH ~2000
70MPH ~2310
80MPH ~2640
90MPH ~2970
100MPH ~3300
Bruce
#4
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I used to have an 80' Z-28 with 275-50-15's on rear limited/posi 3.42 a built 700 using the check ball for convert control . locked up in 4th at 2500r's 85 mph . If You were going say 60 and nailed it , it would unlock n downshift to third and it would hit 100 in about 6 seconds . I liked those gears alot , oh ya the tires were 26"
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#8
8 Second Club
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TKO 600 .64 OD gear, 4.56's in the diff, 28" tires. I am not 100% certain, but I think its at 2500 at 65mph. I had 4.10's in it before, and it reved a bit lower, 2200ish.
I prefer the 4.56's all around.
How tall you can gear it will depend at what rpm your cam is happy, and if you care about take off performance/60ft times/ET - I went 4.56 for ET
Barrett
I prefer the 4.56's all around.
How tall you can gear it will depend at what rpm your cam is happy, and if you care about take off performance/60ft times/ET - I went 4.56 for ET
Barrett
#9
TECH Junkie
iTrader: (1)
Try this.. http://www.buyrcars.com/jag.htm
Scroll down near the bottom for explanation & photos
Courtesy of FastKat/Dave
#11
Maybe you need a tach booster circuit??
Try this.. http://www.buyrcars.com/jag.htm
Scroll down near the bottom for explanation & photos
Courtesy of FastKat/Dave
Try this.. http://www.buyrcars.com/jag.htm
Scroll down near the bottom for explanation & photos
Courtesy of FastKat/Dave
#14
I have been using http://www.wallaceracing.com/gear-speed.php to mess around. The thing I like about this calculator is it gives you from 1000 to 8000 RPM in 500 RPM increments.
Worth playing around.
Bruce
Worth playing around.
Bruce
#16
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I have been using http://www.wallaceracing.com/gear-speed.php to mess around. The thing I like about this calculator is it gives you from 1000 to 8000 RPM in 500 RPM increments.
Worth playing around.
Bruce
Worth playing around.
Bruce
I have been playing around with this one
http://www.angelfire.com/fl/procrastination/rear.html does it sort of the opposite from the one you posted. you put in a target RPM and it gives MPH for different rear end ratios.
i have used it a fair bit recently. My build is nearing completion and with the original intention of 24.5" tall tires I changed my gear ratio from 4.11 down to 3.08 for good intrastate manners (LQ4 +4l80e). However, now the rear tire has changed to a 335/30/19 which is right at 27" tall and I am wishing I went with 3.42 gears or 3.55.
#17
I have been playing around with this one
http://www.angelfire.com/fl/procrastination/rear.html does it sort of the opposite from the one you posted. you put in a target RPM and it gives MPH for different rear end ratios.
i have used it a fair bit recently. My build is nearing completion and with the original intention of 24.5" tall tires I changed my gear ratio from 4.11 down to 3.08 for good intrastate manners (LQ4 +4l80e). However, now the rear tire has changed to a 335/30/19 which is right at 27" tall and I am wishing I went with 3.42 gears or 3.55.
http://www.angelfire.com/fl/procrastination/rear.html does it sort of the opposite from the one you posted. you put in a target RPM and it gives MPH for different rear end ratios.
i have used it a fair bit recently. My build is nearing completion and with the original intention of 24.5" tall tires I changed my gear ratio from 4.11 down to 3.08 for good intrastate manners (LQ4 +4l80e). However, now the rear tire has changed to a 335/30/19 which is right at 27" tall and I am wishing I went with 3.42 gears or 3.55.
Pick a gear is all about compromises. Also up here in Canada the limit is 100 KPH or about 60 MPH on major highways and 80 KMH or 50 MPH on the rest till in town. I don't see cruzing much over 65MPH as the local enforcement will be sure to pull me over at bar minimum to look at the car.
Bruce
#19
Does anyone regret putting too (numerically) high a rear gear in their car? I've got a 4l80e with 40R17s, 4l80e and 3.42s. I hope it will be a daily driver, but with the .75 OD gear, it will be doing 2500 at 75 mph. In my 2.73 rear '99 trans am w/ 4l60e it will do 75 at well below 2k, but still has serious *****. With 400rwhp I'm assuming that street tires would make first gear here completely useless, even with posi. I do drive on the highway every day. Is 3.42 a decent gear? What is the (numerically) lowest gear I can get in a 3 series carrier?
#20
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Does anyone regret putting too (numerically) high a rear gear in their car? I've got a 4l80e with 40R17s, 4l80e and 3.42s. I hope it will be a daily driver, but with the .75 OD gear, it will be doing 2500 at 75 mph. In my 2.73 rear '99 trans am w/ 4l60e it will do 75 at well below 2k, but still has serious *****. With 400rwhp I'm assuming that street tires would make first gear here completely useless, even with posi. I do drive on the highway every day. Is 3.42 a decent gear? What is the (numerically) lowest gear I can get in a 3 series carrier?
3.08:1
3.42:1
3.55:1
3.73:1
3.90:1
4.10:1
4.56:1
4.88:1