[bmwm3redblack]

Hi Guys i've got quick question,i've heard that Manual transmition usually show more power on a dyno vs auto cars because of less drivetrain loss is this true???

[secretsquirrel]

I would guess that the MT will slow slightly more HP on a dyne, but the differences should be only a few HP. The flip side is that the AT is faster.

[The Ghost]

Please note the already lengthy thread a few below yours:
http://www.e90post.com/forums/showthread.php?t=555987

[tibra1]

Def manual..

1) Manual gear box is lighter..
2) U wont experience exhaust drone when u do DPs and exhaust
3) AT heats up waaaaaay more than a Manual
4) Easier and cheaper to service (clutch vs rebuilt AT)

The car has to labor more putting power thru an AT..manual will allow u take full advantage of the cars performance ..especially if ur tuned.

[Beemw335]

Lets see at is faster, unleas you go past 510whp at is better since it can handle it vs changing your clutch on a manual. At is leas kf a hassle during daily driving, at holf boost when you shift so no bog on shifts.
Wastegate rattle is 10 times worse on mt cars then at(confirmed by both my sa and tech at bmw)

[bmwm3redblack]

Thank you guys!!!

[caradd]

Wastegate rattle is 10 times worse on mt cars then at(confirmed by both my sa and tech at bmw)

Huh, why is that? These parts have nothing to do with the type of tranny.

[caradd]

Originally Posted by bmwm3redblack

Hi Guys i've got quick question,i've heard that Manual transmition usually show more power on a dyno vs auto cars because of less drivetrain loss is this true???

Yes that is true. The tranny in the 335i still uses a Torque Convertor. It's a nice tranny but not as good as a double clutch setup like the DCT.

[bmwm3redblack]

Originally Posted by caradd

Yes that is true. The tranny in the 335i still uses a Torque Convertor. It's a nice tranny but not as good as a double clutch setup like the DCT.

So Manual tranny would do a bit higher hp on a dyno?

[caradd]

Originally Posted by bmwm3redblack

So Manual tranny would do a bit higher hp on a dyno?

Yes a little take a look at Cobb's dyno for various cars. This question was asked to them and they confirmed the manuals dyno'ed a little higher.

I would not make a decision on which tranny to get based on dynos though.

[Brey335i]

Tranny choice on the 335i is subjective. You don't really gain or lose much with either

[Beemw335]

An mt might put down a bit more power, but an at would win in a race. So pock what you want bragging about your dyno sheet or winning the race.

Oh ueah and the thing I sai about wg rattle is true dont ask me qhy but you can hear it mich more on anmt for some reason and this was confirmed by a tech and sa.

[lamia2super]

Originally Posted by tibra1

Def manual..

1) Manual gear box is lighter..
2) U wont experience exhaust drone when u do DPs and exhaust
3) AT heats up waaaaaay more than a Manual
4) Easier and cheaper to service (clutch vs rebuilt AT)

The car has to labor more putting power thru an AT..manual will allow u take full advantage of the cars performance ..especially if ur tuned.

dont forget a MT can hold more power. also the diff on a MT has smaller gears then one with a AT

get the DCT! I saw a 335is the other day with a DCT and it was pretty badass and i rode in a DCT GTR and that was really badass

[SSIMPS]

Originally Posted by Beemw335

Wastegate rattle is 10 times worse on mt cars then at(confirmed by both my sa and tech at bmw)

because clearly everything the dealership tells us is true

fwiw I am mt and have no wastegate rattle at all

[N54bimmer]

Originally Posted by 330iSB

because clearly everything the dealership tells us is true

fwiw I am mt and have no wastegate rattle at all

I was told the same thing...
My dealership services 150 to 200 cars per day, Im pretty sure they would have a good idea on how many people come in complaning about wg rattle and they also told me that most of the time its mt owners..and its a big difference he told me.

[N54bimmer]

Oh and let me say a few things here:
DCT's are weak...they slip with just a tune LOL FAIL
At is geared to allow it to hit a higher top speed(like 5kph more lol but still)
AT shifts faster than even the best driver
AT hold boost when you shift
and uh....at is faster LOL so u win the race duhhh isnt that the point of modding

[tunachris]

A MT is a whole lot more fun to drive!

[caradd]

Originally Posted by N54bimmer

I was told the same thing...
My dealership services 150 to 200 cars per day, Im pretty sure they would have a good idea on how many people come in complaning about wg rattle and they also told me that most of the time its mt owners..and its a big difference he told me.

Here is a theory for you:

Most people that own bmw's don't know jack about cars and are just badge hors. Most of these people own automatics.

Manual drivers are more likely to be car enthusiast thus are more likely to notice such things as rattles.

And as mentioned before, dealers are always talking out of their asses.

[caradd]

Originally Posted by N54bimmer

Oh and let me say a few things here:
DCT's are weak...they slip with just a tune LOL FAIL
At is geared to allow it to hit a higher top speed(like 5kph more lol but still)
AT shifts faster than even the best driver
AT hold boost when you shift
and uh....at is faster LOL so u win the race duhhh isnt that the point of modding

I just looked at the specs for the 335i the auto is not geared for higher top speed it is the opposite.

Also the Automatic is listed as 2/10 slower then the manual.

If a car is geared toward having a higher top speed then it will not be geared to be quicker in the low end. You cannot have it both ways.

I agree some of the autos shift faster, the problem is sometimes the f**&* tranny does not know when to shift thus making the fast shift pointless. I've experienced this first hand with my R32 (DSG) I use to own. God damn thing had a mind of its own.

[mase]

Originally Posted by tunachris

A MT is a whole lot more fun to drive!

[M340i Pride]

usually, MT will put down more power because like OP stated it will have less drivetrain loss. and in those cars with traditional AT will be slower than MT.

but our specific ZF 6 speed AT in 335i is a bit different than those AT's. (say like, camry).
it has the ability to lock up torque converter immidiately under manual settings (and in hard driving) that it essentially becomes MT in a sense, resulting in a immidiate and direct transfer of engine's output to the wheels like MT. it is an heck of a AT.
Ive seen AT being clocked actually FASTER than MT in case of our cars in magazine testing.
the key to that is it will shift faster than any human hand can...

so in case of 335i AT, I dont think dyno will be that much different, if not altogether same.

[Blue Streak]

These are very good points and accurate.

I only got to drive a 335i with AT during my first test drive, so I didn't ever hammer it or drive hard enough to notice. I searched far and wide and ended up ordering a 6MT. Since then, all the loaners I've driven have been 328i with AT. I was not very impressed with that tranny, so I presume they are different and that's also what I've read.

Originally Posted by bmwpride335i

usually, MT will put down more power because like OP stated it will have less drivetrain loss. and in those cars with traditional AT will be slower than MT.

but our specific ZF 6 speed AT in 335i is a bit different than those AT's. (say like, camry).
it has the ability to lock up torque converter immidiately under manual settings (and in hard driving) that it essentially becomes MT in a sense, resulting in a immidiate and direct transfer of engine's output to the wheels like MT. it is an heck of a AT.
Ive seen AT being clocked actually FASTER than MT in case of our cars in magazine testing.
the key to that is it will shift faster than any human hand can...

so in case of 335i AT, I dont think dyno will be that much different, if not altogether same.