stock converter, 2.73 gears...how to launch?
10-15-2011, 12:04 PM
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stock converter, 2.73 gears...how to launch? What kind of 60fts are you guys getting with 2.73's and stock converter?
I CANNOT figure out how to launch this thing. 2.0 is my best 2.1 most of the time. and im on drag radials.
Ive tried easing in to it, but it just comes off the line so slow. Stalling it up and mashing it?
I gotta think sub 2.0's are possible for sure...but 2.73's do suck....
I CANNOT figure out how to launch this thing. 2.0 is my best 2.1 most of the time. and im on drag radials.
Ive tried easing in to it, but it just comes off the line so slow. Stalling it up and mashing it?
I gotta think sub 2.0's are possible for sure...but 2.73's do suck....
10-15-2011, 12:44 PM
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What mods do you have? I think the best I ever got on 2.73's and stock converter was a 1.9X on street tires. Usually it would run 2.0X on street tires, never ran that combo on a DR. It's been awhile but I think I tried everything from off of idle to stalling it up a bit. Practice with different methods.
10-15-2011, 01:10 PM
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If you aren't spinning then you probably have met the limits of the 2.73s with a stock stall. I ran a best of 1.92 on the stock stall with street tires but I had 3.23s.
10-15-2011, 03:38 PM
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Don't worry about the gears, get a stall if you want a significantly better launch.
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10-16-2011, 04:22 AM
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Why would you think that? Once you have a 3500+ stall, the gains from going to shorter gears (say 3.42 or 3.73) will be limited to about one tenth of ET reduction.
The 4L60E trans has a very aggressive internal 1st gear ratio (as compared to the older TH350/400 & 200/2004R) that doesn't need a ton of gear to get a light F-body launched.
I think you are placing too much concern on gears. Even if you had a 3.23 car, you wouldn't be able to launch much harder than you are now (I've had two 3.23 LS1s and two 2.73 LS1s, the difference in launch isn't very much). The item that is holding you back most in this department is the stock TC. If you want to see real reduction in your 60 foot time, do a 3500+ stall and find tires that will hold it. Even if you go up to a 3.73 or 4.10 you will never come close to attaining the full potential of your car's launching ability with that stock TC.
The 4L60E trans has a very aggressive internal 1st gear ratio (as compared to the older TH350/400 & 200/2004R) that doesn't need a ton of gear to get a light F-body launched.
I think you are placing too much concern on gears. Even if you had a 3.23 car, you wouldn't be able to launch much harder than you are now (I've had two 3.23 LS1s and two 2.73 LS1s, the difference in launch isn't very much). The item that is holding you back most in this department is the stock TC. If you want to see real reduction in your 60 foot time, do a 3500+ stall and find tires that will hold it. Even if you go up to a 3.73 or 4.10 you will never come close to attaining the full potential of your car's launching ability with that stock TC.
10-16-2011, 06:44 AM
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I've tried the foot-brake thing and it really hasn't worked that good for me. Now flashing the stock TC has been alot better for me. I've never been below 2.0 foot-braking it and went 1.96 flashing it.
10-16-2011, 07:37 PM
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best i cut was a 1.9 with lca's street tires holding rpms at 1100 . Stock stall and 2.73s are a dog out of the hole. Honestly there isn't a perfect rpm to launch at. A stall is awesome and really made the car feel like a animal, but in the meantime just try different ways to launch and see what works best for you, the car, and track.
10-16-2011, 07:50 PM
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To answer the question of this thread just brake stall it, the best I could do on stock converter was a 2.1, so I would say you are maxing your launch with your current setup. If I remember correctly, being that the stall is so small, footbraking just bogs it down because you can't get it up really enough to gain any real advantage at leaving at a better rpm. I think I could get it to 1200 footbraking and 1800 by flashing it so no real clear advantage imo. I remember I NEVER spun trying to do either one.
I have recently went to a 3600 and can just about get 1.7 60' but I am struggling with traction by footbraking it. Flashing it, I have some spin, but not near as much.
I have recently went to a 3600 and can just about get 1.7 60' but I am struggling with traction by footbraking it. Flashing it, I have some spin, but not near as much.
10-17-2011, 09:26 PM
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How the hell do you stall it above 1200rpms. Even when I go around the waterbox and warm up the street tires,I get to about 900-1000rpms and my car start to lite up the tires. Also if I stall the stock tc it will bog instead of launching. My opinion is do both and see what's better.
10-18-2011, 05:40 PM
#20
How the hell do you stall it above 1200rpms. Even when I go around the waterbox and warm up the street tires,I get to about 900-1000rpms and my car start to lite up the tires. Also if I stall the stock tc it will bog instead of launching. My opinion is do both and see what's better.