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Automatic Sti's and Modding
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Old 08-07-12, 03:54 PM   #31
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Default Re: Automatic Sti's and Modding

IIRC the auto STi (not offered in the states) is a true dual clutch ie; DSG like what's found in the EVO MR, GT-R and many other cars. It is certainly NOT a traditional auto transmission like what most of us are familiar with. For the most part it is a dual clutch auto shifting transmission, not a slushbox. I would jump on one of those all day long, they shift faster than you can manually and if you go into 'manual mode' and use the paddles the shifting is very precise and controllable!
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Old 08-07-12, 03:55 PM   #32
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Default Re: Automatic Sti's and Modding

never drove a manual nor cared to try it out

all my friends who own a manual car drive their cars once or twice a week due to the heavy traffic and own other cars

my car will be a semi daily driver
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Old 08-07-12, 06:44 PM   #33
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Default Re: Automatic Sti's and Modding

Quote:
Originally Posted by killerbmotorsport View Post
IIRC the auto STi (not offered in the states) is a true dual clutch ie; DSG like what's found in the EVO MR, GT-R and many other cars. It is certainly NOT a traditional auto transmission like what most of us are familiar with. For the most part it is a dual clutch auto shifting transmission, not a slushbox. I would jump on one of those all day long, they shift faster than you can manually and if you go into 'manual mode' and use the paddles the shifting is very precise and controllable!
Nope. 5 speed slushbox.

Subaru WRX STI gets five-speed automatic option... Down Under
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Old 08-07-12, 07:09 PM   #34
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Default Re: Automatic Sti's and Modding

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Oh this is new to me and...
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Old 08-08-12, 06:38 PM   #35
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Default Re: Automatic Sti's and Modding

It is true that the transmission isn't as fast. And that it does limit the power. On one of the local shops here with a low reading dyno (dynojet, around ~30whp less of a dynapack) The baseline dyno of the A-Line was at 196whp, I currently forget the torque figures. And even with a full exhaust, intake, and ebs, it doesn't hit 300whp. And the torque reads less.
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Old 08-08-12, 08:49 PM   #36
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Default Re: Automatic Sti's and Modding

It makes sense there's more loss with a slushbox auto. It's always been that way. The torque converter causes loss in the form of heat. The engine also has to drive a pump (driven by a shaft attached to the input side of the torque converter) to supply hydraulic pressure and keep the clutch packs pressed together. Then there's the losses due to all gears always taking torque and pushing on each other (in different configurations of course, however all gears are always a part of what's going on) it creates tons of loss. That added with AWD loss anyway makes for some nasty drivetrain losses.

No slushboxes for me, thanks.
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Old 08-08-12, 09:42 PM   #37
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Default Re: Automatic Sti's and Modding

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It makes sense there's more loss with a slushbox auto. It's always been that way. The torque converter causes loss in the form of heat. The engine also has to drive a pump (driven by a shaft attached to the input side of the torque converter) to supply hydraulic pressure and keep the clutch packs pressed together. Then there's the losses due to all gears always taking torque and pushing on each other (in different configurations of course, however all gears are always a part of what's going on) it creates tons of loss. That added with AWD loss anyway makes for some nasty drivetrain losses.

No slushboxes for me, thanks.
Thanks for the information. I understand some of your dislike for the auto tranny, but it still does its job with decent power. At the end of the day, it's still an STI.
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Old 08-08-12, 10:23 PM   #38
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Default Re: Automatic Sti's and Modding

still trying to figure out why you still want to get and mod an sti if you say the traffic is so terrible??? If the traffic is so bad then what would really be the point? IMO with all the drive train power loss it would make more sense to get something cheaper that has more aftermarket support in your area.
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Old 08-09-12, 01:42 AM   #39
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Default Re: Automatic Sti's and Modding

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still trying to figure out why you still want to get and mod an sti if you say the traffic is so terrible??? If the traffic is so bad then what would really be the point? IMO with all the drive train power loss it would make more sense to get something cheaper that has more aftermarket support in your area.
The traffic of daily commute may be horrible. But weekend drives with the highways and some mountain roads are quite fun. I mean, there are some powerful cars in the country. I believe those are just weekend cars as compared to an auto sti that can do both. Considering the great handling our cars have, with decent power, it's pretty fun.

Don't get me wrong, I really enjoy driving manual - Had an Impreza '08 2.0L m/t, but for other reasons, I got an auto. And it's still a fun car.
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Old 08-09-12, 09:10 AM   #40
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Default Re: Automatic Sti's and Modding

Again get what you want but I agree that shifting is part of the fun of driving the STI.

I always laugh at people that rationalize servo shifting manuals because they shift faster as if they're doing timed laps at the Nurburgring testing for Subaru.
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