Gears? 3.73 v. 3.55
05-13-2012, 09:32 PM
#23
maybe this will help...?
https://vimeo.com/42096122
Though I hate the ashtray gauges... i really need to change that.
05-13-2012, 10:43 PM
#24
TECH Fanatic
Thread Starter
woot... partial CS kit is on the way..
4 weeks for DSS to fab up my drive shaft and axles.. i got the built outer CVs since i'm providing the diff
sounds like a leer jet
4 weeks for DSS to fab up my drive shaft and axles.. i got the built outer CVs since i'm providing the diffLOL, though, that does sound like fun...
maybe this will help...?
https://vimeo.com/42096122
Though I hate the ashtray gauges... i really need to change that.
maybe this will help...?
https://vimeo.com/42096122
Though I hate the ashtray gauges... i really need to change that.
sounds like a leer jet
02-06-2019, 08:38 AM
#26
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Ls1 t56 pt88 Are 3.55 good for my setup I have a ls1 forged piston rods prc 243 fast 92mm pt88 cam motion cam 236/232 117+6 10.3.1 compression . Just want to know if 3.55 would be good for my setup and what tire size .
02-06-2019, 02:00 PM
#27
If your ultimate goal is lower drag times, a lower gear is what you'll want to use to get off the line faster. 3.55 would not be a good choice there. 4.10s or deeper is recommended. Tire height can be chosen to with a gear calculator to find the ideal gear & RPM you cross the 1/4mi finish line in. http://www.tremec.com/calculadora.php
If you do mixed daily driving in the car and also like to hot rod it a bit (clearly, based on your engine) a 3.73 is a good compromise of both low end and reasonable highway cruising RPMs.
If your car sees a majority of highway miles but you like accelerating through long sweeping curves and rarely do any actual racing, then a 3.55 is a good choice.
02-06-2019, 03:20 PM
#28
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Your gearing choice has less to do with your engine and more to do with how you intend to use the car.
If your ultimate goal is lower drag times, a lower gear is what you'll want to use to get off the line faster. 3.55 would not be a good choice there. 4.10s or deeper is recommended. Tire height can be chosen to with a gear calculator to find the ideal gear & RPM you cross the 1/4mi finish line in. http://www.tremec.com/calculadora.php
If you do mixed daily driving in the car and also like to hot rod it a bit (clearly, based on your engine) a 3.73 is a good compromise of both low end and reasonable highway cruising RPMs.
If your car sees a majority of highway miles but you like accelerating through long sweeping curves and rarely do any actual racing, then a 3.55 is a good choice.
If your ultimate goal is lower drag times, a lower gear is what you'll want to use to get off the line faster. 3.55 would not be a good choice there. 4.10s or deeper is recommended. Tire height can be chosen to with a gear calculator to find the ideal gear & RPM you cross the 1/4mi finish line in. http://www.tremec.com/calculadora.php
If you do mixed daily driving in the car and also like to hot rod it a bit (clearly, based on your engine) a 3.73 is a good compromise of both low end and reasonable highway cruising RPMs.
If your car sees a majority of highway miles but you like accelerating through long sweeping curves and rarely do any actual racing, then a 3.55 is a good choice.
02-06-2019, 05:04 PM
#29
If you’re drag racing you need to figure out your trap speed and final gear. If a longer (3.55) rear can save you that last shift that can help your decision. A shorter gear (4.10) might help you accelerate quicker on paper but it could cause you to spin easier and also need an extra shift before you clear the traps
02-07-2019, 04:38 PM
#30
I've been very happy sticking with 3.73s in my setup with 28" tires. I've been 164mph in the 1/4 so far, going through the traps around 7400 rpm. I'm willing to spin it upwards of 8,000 before changing the gearing, we'll see if it wont go 170mph this year. I couldn't justify going to a 3.55 until making 1500whp or so.
02-07-2019, 05:23 PM
#31
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I've been very happy sticking with 3.73s in my setup with 28" tires. I've been 164mph in the 1/4 so far, going through the traps around 7400 rpm. I'm willing to spin it upwards of 8,000 before changing the gearing, we'll see if it wont go 170mph this year. I couldn't justify going to a 3.55 until making 1500whp or so.
02-08-2019, 03:19 PM
#33
I've been very happy sticking with 3.73s in my setup with 28" tires. I've been 164mph in the 1/4 so far, going through the traps around 7400 rpm. I'm willing to spin it upwards of 8,000 before changing the gearing, we'll see if it wont go 170mph this year. I couldn't justify going to a 3.55 until making 1500whp or so.
