2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

auto vs manual

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Old May 19, 2007 | 08:21 PM
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auto vs manual

how much slower is the auto? i cant seem to find any tests on an ss auto.
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Old May 19, 2007 | 08:36 PM
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It's .6-.7 sec. slower in the 1/4 stock, buy it will get within .2-.3 sec. of the 5spd. with a tranny tune.

EDIT: This assumes a highly skilled driver of the 5spd. It's much easier to launch an auto.
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Old May 19, 2007 | 08:54 PM
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yeah like he said it depends on the driver. i have an g5 gt auto and i took three sc off the line by 1 to 2 cars. but i got my ass handed to me when i raced this skilled driver in a sc. he took me by 2 cars right away so i think it depends on the driver.
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Old May 19, 2007 | 09:51 PM
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Too weird... was having this conversation today with my roommate. He never thought it was worthwhile to do any work to anything but a manual.
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Old May 19, 2007 | 10:05 PM
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stock vs. stock someone needs to race and get it on video, because my stock auto sedan ran a best of 15.78 two weekends ago in the 1/4, i have seen 5 speed 2.4s with higher times than that. last weekend, we modded the airbox, put in a k&n, welded on a maganoflow muffler, and did a hp tuners motor and tranny tune and ran a 15.45 best. which is pretty good for 230.00 bucks worth of mods. ($50 k&n, $130 magnaflow, $50 tune) oh and the track is only a few hundred feet above sea level. (times are correct)
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Old May 19, 2007 | 10:17 PM
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Originally Posted by jeweler54
stock vs. stock someone needs to race and get it on video, because my stock auto sedan ran a best of 15.78 two weekends ago in the 1/4, i have seen 5 speed 2.4s with higher times than that. last weekend, we modded the airbox, put in a k&n, welded on a maganoflow muffler, and did a hp tuners motor and tranny tune and ran a 15.45 best. which is pretty good for 230.00 bucks worth of mods. ($50 k&n, $130 magnaflow, $50 tune) oh and the track is only a few hundred feet above sea level. (times are correct)
Ok so noob question time. What exactly is involved in a tranny tune? Where can I go to get this done and what result would it have on a stock LT?
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Old May 19, 2007 | 10:32 PM
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only for the 2.4 as far as i know, i dont believe they have any tranny tuning for the 2.2 yet??????? i dont know bro, check in the 2.2 section, cause im not sure. but hp tuners is a good choice. find someone that has some, just buy a credit. thats what i did
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Old May 19, 2007 | 10:36 PM
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No tuning yet for the 2.2. If you do a search there's an individual with a HPtuners set up that attempted this on a 2.2 with no luck. Only time will tell....
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Old May 20, 2007 | 05:32 PM
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manual all the way dude. id say its just a hare faster than auto. depends on whos driving i guess. and mods... but if you have an auto good workin on it then.

ryan.
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Old May 20, 2007 | 07:17 PM
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An auto stock for stock is slower than a manual for a group of reasons and this is totally undeniable, i don't care who you beat, it was their driving.
-Automatics put less power to the ground than a manual due to higher drivetrain power loss because of the torque converter, and other heavier/more moving parts.
-Auto's can not launch as hard in stock form.
-The auto in your car has one less gear than the manual (4 speed vs 5 speed) which in turn gives you a talller effective gear ratio.
-Shift firmness. The auto's kinda glide into gear stock. This is for comfortability, while a manual can slam it into gear and get that power down instantly.
-Less control

Mind you, much of this can be changed in the auto, and a properly built automatic will outrun a manual of equal power. A torque converter change can allow you to launch harder, a tranny tune can increase your shift firmness, and enhance your shift points, etc. Neither is really "better." It depends what you want to use it for. Both are worth modding.

Originally Posted by rlinden86
manual all the way dude. id say its just a hare faster than auto. depends on whos driving i guess. and mods... but if you have an auto good workin on it then.

ryan.
dude is that seriously a quote from one of the fast and the furious movies in your sig?

Last edited by 8cd03gro; May 20, 2007 at 07:17 PM. Reason: Automerged Doublepost
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Old May 20, 2007 | 07:54 PM
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yup its from the 1st fast and the furious. when loni i think her name is says to that guy shes racing at race wars and puts up her money. good line i like it.

ryan.
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Old May 20, 2007 | 07:56 PM
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I test drove an auto and it felt slow compared to my manual, mainly because of the different gearing, but when you have to take into consideration the launch and all, the difference might not be that big, but the 5speed sure feels better to drive IMHO!
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Old May 21, 2007 | 11:36 AM
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I have owned both manual and auto 2.4L SS cars. The only on the board to do so.

I have raced both cars. The only differnece is the 5 speed was a coupe and the auto is a 4 door. 75lbs differnce in weight. The weight gain might make 0.1 sec.

best time for the 5 speed 2dr was 16.2@85 mph (STOCK)

best time to date for the auto 4 dr is 17.0@80 mph (STOCK)

Both were riun on hot nights

MINUS 1 SEC to get your sea-level times
(the air qaulity on a summer friday night is nearly always close to or more then 5000ft! Unless we hava freakishly cool day)

I might go back a try agian in the 4dr but even if it does go a touch quickers...were only talking a tenth or two. I'll be sure to post new info.

I am sure some genius will dispute my facts

Oh and the 2.4L auto is pathetic off the line! I got 2.6 60 ft times! Jeykl in his old S/C got 2.1 I beleive. SO much for th 2.4L being faster off the line!
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Old May 21, 2007 | 11:51 AM
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Originally Posted by 8cd03gro
An auto stock for stock is slower than a manual for a group of reasons and this is totally undeniable, i don't care who you beat, it was their driving.
-Automatics put less power to the ground than a manual due to higher drivetrain power loss because of the torque converter, and other heavier/more moving parts.
-Auto's can not launch as hard in stock form.
-The auto in your car has one less gear than the manual (4 speed vs 5 speed) which in turn gives you a talller effective gear ratio.
-Shift firmness. The auto's kinda glide into gear stock. This is for comfortability, while a manual can slam it into gear and get that power down instantly.
-Less control

Mind you, much of this can be changed in the auto, and a properly built automatic will outrun a manual of equal power. A torque converter change can allow you to launch harder, a tranny tune can increase your shift firmness, and enhance your shift points, etc. Neither is really "better." It depends what you want to use it for. Both are worth modding.



dude is that seriously a quote from one of the fast and the furious movies in your sig?
Good post. Rep added.
But you forgot one important advantage.
Auto tranny = no missed shifts. You'll pretty much get the same performance time after time. So if some Civic SI pounds you into the dirt, it's because you're car is slower, not because you boffed between 2nd and 3rd.
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Old May 21, 2007 | 12:48 PM
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Originally Posted by monkeiboy
Good post. Rep added.
But you forgot one important advantage.
Auto tranny = no missed shifts. You'll pretty much get the same performance time after time. So if some Civic SI pounds you into the dirt, it's because you're car is slower, not because you boffed between 2nd and 3rd.

i usually have lots of problems with getting it into 2nd on my 2.4 manual. that gear is tight as hell. it grinds only when 1st is at 7k then slammin it in 2nd. only sometimes if i wait just a split second at 7k itl slide right into 2nd around 6800. but thats why im getting a new shifter for smoother shifts.

ryan.
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Old May 21, 2007 | 12:54 PM
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With the trans tune you can do to the automatic it shifts faster and harder then a manual ever could! You never miss a shift either.

Factory the 5spd is a tad faster by a few tenths, but with the tune we can get it puts us about one tenth behind the best 5spd driver. So if we're .1 behind someone at their vry best and we can run it all the time the chances of us winning go WAY up.
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Old May 21, 2007 | 12:59 PM
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Originally Posted by Jackalope
With the trans tune you can do to the automatic it shifts faster and harder then a manual ever could! You never miss a shift either.

Factory the 5spd is a tad faster by a few tenths, but with the tune we can get it puts us about one tenth behind the best 5spd driver. So if we're .1 behind someone at their vry best and we can run it all the time the chances of us winning go WAY up.
well im pretty good at my car now i know its limits and what the best rpm for drag is. about 4k is the limit i think is good thats the max tourque b4 the wheels start hop or spinning.

ryan.
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Old May 21, 2007 | 04:07 PM
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Originally Posted by Jackalope
With the trans tune you can do to the automatic it shifts faster and harder then a manual ever could! You never miss a shift either.

Factory the 5spd is a tad faster by a few tenths, but with the tune we can get it puts us about one tenth behind the best 5spd driver. So if we're .1 behind someone at their vry best and we can run it all the time the chances of us winning go WAY up.
well sort of. With a tranny tune, you can increase the firmness, but it will never be able to shift as "hard" as a manual can. The speed will be there though, that you are correct on. What you guys have to keep in mind though this is not a high performance auto tranny. It is an economy based 4 speed. To keep up with a properly driven manual with the same mods, you are going to need extensive tranny work, not just a tune.
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Old May 21, 2007 | 04:10 PM
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Originally Posted by 8cd03gro
well sort of. With a tranny tune, you can increase the firmness, but it will never be able to shift as "hard" as a manual can. The speed will be there though, that you are correct on. What you guys have to keep in mind though this is not a high performance auto tranny. It is an economy based 4 speed. To keep up with a properly driven manual with the same mods, you are going to need extensive tranny work, not just a tune.
Well thats weird. When I had the tune on my car it would chirp 2nd and 3rd when I was on it hard. *shrug* I thought it shifted hard enough.
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Old May 21, 2007 | 04:24 PM
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Originally Posted by Jackalope
Well thats weird. When I had the tune on my car it would chirp 2nd and 3rd when I was on it hard. *shrug* I thought it shifted hard enough.
hard enough is fine, but it's not harder. When you shift in a manual car you are transferring mechanical engergy through a solid clutch. Torque converter = not so much.
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Old May 21, 2007 | 04:26 PM
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Originally Posted by 8cd03gro
hard enough is fine, but it's not harder. When you shift in a manual car you are transferring mechanical engergy through a solid clutch. Torque converter = not so much.
Ok I got what your saying now. I was refering to the quickness and firmess of how the shifts felt not the transfer of mechanical energy Mr. Lets Get All Technical!
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Old May 21, 2007 | 06:57 PM
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a tranny tune cuts off about a half second in the 1/4 mile. with that said this car has some ***** for an auto 4 cylinder.
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