WRX 6MT Swap -- Part 2
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From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
Originally posted by Drewski
A measly 26? Sheesh - I wish my mileage was that measly! I feel lucky if I can get out of the teens on my 52 mile-per-day highway commute!
A measly 26? Sheesh - I wish my mileage was that measly! I feel lucky if I can get out of the teens on my 52 mile-per-day highway commute!
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Nope, it's my 5 speed '01 RS. Wagons have taller gears than sedans, and WRXs have taller gears than the RS. So, the difference seems about right. Oh, and you are correct about the 6MT, it's 6th gear is shorter than even my 5th.
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So the 6MT is heavier, reqires an extra shift in a 0-60 launch, has worse fuel economy at higway speeds, and all it brings to the car is a smoother shift and rugged durabillity?
Yeeesh.. Now I know why Subaru didn't put it in the 02's.. I should be able to trade my 5MT to a 6MT owner at a profit!
Yeeesh.. Now I know why Subaru didn't put it in the 02's.. I should be able to trade my 5MT to a 6MT owner at a profit!
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Originally posted by 420wrx
So the 6MT is heavier, reqires an extra shift in a 0-60 launch, has worse fuel economy at higway speeds, and all it brings to the car is a smoother shift and rugged durabillity?
Yeeesh.. Now I know why Subaru didn't put it in the 02's.. I should be able to trade my 5MT to a 6MT owner at a profit!
So the 6MT is heavier, reqires an extra shift in a 0-60 launch, has worse fuel economy at higway speeds, and all it brings to the car is a smoother shift and rugged durabillity?
Yeeesh.. Now I know why Subaru didn't put it in the 02's.. I should be able to trade my 5MT to a 6MT owner at a profit!
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Originally posted by 420wrx
So the 6MT is heavier, reqires an extra shift in a 0-60 launch, has worse fuel economy at higway speeds, and all it brings to the car is a smoother shift and rugged durabillity?
Yeeesh.. Now I know why Subaru didn't put it in the 02's.. I should be able to trade my 5MT to a 6MT owner at a profit!
So the 6MT is heavier, reqires an extra shift in a 0-60 launch, has worse fuel economy at higway speeds, and all it brings to the car is a smoother shift and rugged durabillity?
Yeeesh.. Now I know why Subaru didn't put it in the 02's.. I should be able to trade my 5MT to a 6MT owner at a profit!
That's why every new Sti comes with a six speed.
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Car Info: 02 Impreza WRX sedan
Originally posted by 420wrx
So the 6MT is heavier, requires an extra shift in a 0-60 launch, has worse fuel economy at highway speeds, and all it brings to the car is a smoother shift and rugged durability?
<snip..>
I don't think we can assume two shifts to 60 mph as opposed to one for the 5MT. Ideally for standing starts, a transmission gear ratio spread can be greater in the lower gears where torque multiplication is greater and wind resistance is minimal, but geared closer as vehicle speed increases in the higher gears.
All else being equal, a 5MT-equipped car may be slightly quicker down the quarter-mile compared with a 6MT, due to less rotating mass and inertia inside of the transmission. Maybe.
--
^ww^
"...axles of evil..." - George W. Bush
So the 6MT is heavier, requires an extra shift in a 0-60 launch, has worse fuel economy at highway speeds, and all it brings to the car is a smoother shift and rugged durability?
<snip..>
I don't think we can assume two shifts to 60 mph as opposed to one for the 5MT. Ideally for standing starts, a transmission gear ratio spread can be greater in the lower gears where torque multiplication is greater and wind resistance is minimal, but geared closer as vehicle speed increases in the higher gears.
All else being equal, a 5MT-equipped car may be slightly quicker down the quarter-mile compared with a 6MT, due to less rotating mass and inertia inside of the transmission. Maybe.
--
^ww^
"...axles of evil..." - George W. Bush
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You don't own a 5MT I assume? The 5MT is a 2 shift 0-60MPH (1st gear will get you to 60KPH just before the rev limiter), so I'm assuming that the 6MT would be 3 shifts in a 0-60MPH sprint.
Lets not forget the extra weight of the transmission and all the required matching components... Even without the extra shift, this tranny is only going to be tempting to people making enough power to require a stronger trans and can excuse the extra weight as neccessary.
Lets not forget the extra weight of the transmission and all the required matching components... Even without the extra shift, this tranny is only going to be tempting to people making enough power to require a stronger trans and can excuse the extra weight as neccessary.
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From: South Carolina
Car Info: 02 WRX
Originally posted by 420wrx
You don't own a 5MT I assume? The 5MT is a 2 shift 0-60MPH (1st gear will get you to 60KPH just before the rev limiter), so I'm assuming that the 6MT would be 3 shifts in a 0-60MPH sprint.
Lets not forget the extra weight of the transmission and all the required matching components... Even without the extra shift, this tranny is only going to be tempting to people making enough power to require a stronger trans and can excuse the extra weight as neccessary.
You don't own a 5MT I assume? The 5MT is a 2 shift 0-60MPH (1st gear will get you to 60KPH just before the rev limiter), so I'm assuming that the 6MT would be 3 shifts in a 0-60MPH sprint.
Lets not forget the extra weight of the transmission and all the required matching components... Even without the extra shift, this tranny is only going to be tempting to people making enough power to require a stronger trans and can excuse the extra weight as neccessary.
ARE YOU HIGH?
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Car Info: 02 Impreza WRX sedan
Originally posted by 420wrx
You don't own a 5MT I assume? The 5MT is a 2 shift 0-60MPH (1st gear will get you to 60KPH just before the rev limiter), so I'm assuming that the 6MT would be 3 shifts in a 0-60MPH sprint.
You lost me. I do have a 5MT but I only shift once to get to 60 mph. This is the 1st to 2nd gear shift. Even the factory owner's manual states that maximum speed in 2nd gear is 61 mph, so I don't need to shift into 3rd to get to 60 mph.
--
^ww^
"...axles of evil..." - George W. Bush
You don't own a 5MT I assume? The 5MT is a 2 shift 0-60MPH (1st gear will get you to 60KPH just before the rev limiter), so I'm assuming that the 6MT would be 3 shifts in a 0-60MPH sprint.
You lost me. I do have a 5MT but I only shift once to get to 60 mph. This is the 1st to 2nd gear shift. Even the factory owner's manual states that maximum speed in 2nd gear is 61 mph, so I don't need to shift into 3rd to get to 60 mph.
--
^ww^
"...axles of evil..." - George W. Bush
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Yeah your right you only shift once and use 2 gears.. I was thinking gears and saying shifts, must be the drugs.
Really, the point is that you have to shift more in a sprint with a 6-Speed. The added weight isn't just the tranny, it's the rest of the heavier/stronger components required to mate the trans with the car.
Those two items have got to account for fair ammount of performance loss. But as I said, once you reach a power output where you *need* stronger components, the issue of performance isn't up for debate.
Really, the point is that you have to shift more in a sprint with a 6-Speed. The added weight isn't just the tranny, it's the rest of the heavier/stronger components required to mate the trans with the car.
Those two items have got to account for fair ammount of performance loss. But as I said, once you reach a power output where you *need* stronger components, the issue of performance isn't up for debate.
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6MT in SVX?
I know this is sorta off topic but it is a 6mt swap question so bear with me for a minute.
Just bought 2 SVX's, and if you thought the wrx had tranny problems...at a minimum one of them is getting a MT swap, probably going to order the kit from www.smallcar.com, they makes a 5 speed swap using a WRX tranny. Now my question is this. Supposing money wasn't the driving factor how much harder would it be to use an STI 6speed tranny. Can it be done without major fabrication? Ny assumption is that if you can put a WRX 5speed in then you can put a STI 6speed in. Just wondering how much harder that would be?
Just bought 2 SVX's, and if you thought the wrx had tranny problems...at a minimum one of them is getting a MT swap, probably going to order the kit from www.smallcar.com, they makes a 5 speed swap using a WRX tranny. Now my question is this. Supposing money wasn't the driving factor how much harder would it be to use an STI 6speed tranny. Can it be done without major fabrication? Ny assumption is that if you can put a WRX 5speed in then you can put a STI 6speed in. Just wondering how much harder that would be?
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There's already a small amount of alteration in putting an STi tranny in a WRX, like the backwards clutch actuator, but I doubt there's anything that's any more complicated or involved than what you'll be doing by swapping an auto for a stick anyway. You'd have legions of fans if you dropped the 6MT in an SVX though, and then boosted it!