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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Calm before the storm



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      08-08-2007, 08:54 AM   #67
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Has anybody installed this on a sedan yet???

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      08-08-2007, 09:48 AM   #68
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Quote:
Originally Posted by 533ogetnom View Post
i would still rather have the torque available and learn to master it then have it limited
Nah, I'm talking about road course. And while I'm not often at 2k on a road course, a power curve that increases at a slower rate as I increase revs is not ideal for road course.

Take a look at the curves on the M3, M5 or any Forumula 1 car for that matter. They are what V2 will strive to be and that's a good thing.

PS - 533, do you do road course a lot? It seems like all the guys on the board who do road courses and all the engineers who build cars for road courses seem to agree that a rising, linear power band is good, but you disagree. Maybe you know something we don't. I'm always open for suggestions.
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      08-08-2007, 10:14 AM   #69
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Wider power range is better than peaky, meaning that "horisontally linear" power band is better than "increasing linear". Having max power available at all the revs would certainly be fast. In a road course you would not be in the limited part of the torque range in any case.

For me it's not a big deal. I would not use the low end max torque, so I don't care if it is there or not. I also believe that occasional use of max torque could be ok longevity wise for the drivetrain. Still my reason for avoiding the use of Max tq would be partly based on avoiding the longevity problems, and partly for that fact that there is no need for using the max torque.
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      08-08-2007, 11:14 AM   #70
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Quote:
Originally Posted by bnj View Post
Wider power range is better than peaky, meaning that "horisontally linear" power band is better than "increasing linear". Having max power available at all the revs would certainly be fast. In a road course you would not be in the limited part of the torque range in any case.

For me it's not a big deal. I would not use the low end max torque, so I don't care if it is there or not. I also believe that occasional use of max torque could be ok longevity wise for the drivetrain. Still my reason for avoiding the use of Max tq would be partly based on avoiding the longevity problems, and partly for that fact that there is no need for using the max torque.

Hey man, I think we are saying the same thing, but we are using different terminology - perhaps because I'm American and we like to come up with our own words and measurements.

For me, POWER = Horsepower. I think you are using power to mean torque, in which case I fully agree.
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      08-08-2007, 12:09 PM   #71
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Quote:
Originally Posted by leftcoastman View Post
Yup, all hail to slovakian drivers - you guys rock. If I had to drive Skodas until 1989 - I'd be as good as you too!

That said, there's a reason why cars designed for track use try to have power curves that build toward redline.

That's why I am glad Shiv is making V2 more suitable for us track junkies.
Well, thx for reminding me, I've almost forgotten
At least the Skodas were good to teach us to drive the rwd cars with engines in the rear. Does it remind U anything? Like a Porsche, just a few 100s of HP missing

Nothing against U, but for sure, if track = drag, I feel a lilbit sorry U have to suffer with such a curvy curve. On the road course U'll get used to it sooner or later. It is possible, look at Marcus Grönholm

Anyway, I fully agree with U, but I always say - a good player plays the cards he has, not the cards he doesn't. So if V2 cures your track junkie problem, good for U. If not, get an M3. I believe it will have a more N/A-like power curve.
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      08-08-2007, 12:13 PM   #72
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Quote:
Originally Posted by judec View Post
Well, thx for reminding me, I've almost forgotten
At least the Skodas were good to teach us to drive the rwd cars with engines in the rear. Does it remind U anything? Like a Porsche, just a few 100s of HP missing

Nothing against U, but for sure, if track = drag, I feel a lilbit sorry U have to suffer with such a curvy curve. On the road course U'll get used to it sooner or later. It is possible, look at Marcus Grönholm

Anyway, I fully agree with U, but I always say - a good player plays the cards he has, not the cards he doesn't. So if V2 cures your track junkie problem, good for U. If not, get an M3. I believe it will have a more N/A-like power curve.
I think we are on the same page then. Except while I play with the cards I have, I'm always looking to improve my cards.
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      08-08-2007, 12:51 PM   #73
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Quote:
Originally Posted by stefano7171 View Post
You are not disappointing me. I know AT is more prone to failure... and on my car I have a 6MT!
I was guessing if I should get the full torque map or if the Vishnu's concerns are limited to the AT.
After all the same 6MT in the US is mounted on the M5, that has around 390 lbs/ft torque stock and I assume therefore that the gearbox can handle more.
6MT owners can therefore choose a full torque map with little risk IMHO!
oh no sorry the dissapoint thing was for judec, he wanted me to not write about the benefits of a manual over an auto
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      08-08-2007, 01:07 PM   #74
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Quote:
Originally Posted by leftcoastman View Post
Nah, I'm talking about road course. And while I'm not often at 2k on a road course, a power curve that increases at a slower rate as I increase revs is not ideal for road course.

Take a look at the curves on the M3, M5 or any Forumula 1 car for that matter. They are what V2 will strive to be and that's a good thing.

PS - 533, do you do road course a lot? It seems like all the guys on the board who do road courses and all the engineers who build cars for road courses seem to agree that a rising, linear power band is good, but you disagree. Maybe you know something we don't. I'm always open for suggestions.
i think your very confused all the cars u mentioned are similar after 3k (like i said)

the reason NA engines build torque as they move up in rev ranges is NOT because the engineers decided it would be good for the track, its because thats a characteristic of NA engines, as the revs increase more air is sucked into the cylinder than at lower revs due to the increased velocity of the intake flow (air is actually still flowing in even after the cylinder starts moving up might not make sense to you but thats how it works) provided everything is wide enough torque and hp can build to redline

if the engineers or trackers could, they would take that torque along the full rev range, you would be an idiot not to,

and "take a look at any formula 1 car" are you joking? f1 cars WERE turbo charged until the FIA banned them as one of their speed reducing saftey and cost cutting measures, in addition most racing series that allow turbos all the cars opt in for them

i do agree that sudden heavy peaky power is bad though, but as i said its not problem in the 335 because that peak is at 2k and if your worried about it during off to on throttle V2 isnt going to fix that.

and i dont agree, and no one in their right mind would, that you should limit your torque in lower revs so that you have an upsloping curve so you can more easily race around the track, thats just dumb
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      08-08-2007, 04:19 PM   #75
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Its smart of Shiv to keep it simple. the K.I.S.S. method. With just using his Catback and Proceed, we get a positive result for the 335i's. No guessing.

400wrtq sounds awfully inviting! lol.

I cant wait to get my 335i,,, even thou Im going to miss the little Evo box.
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      08-08-2007, 04:25 PM   #76
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Quote:
Originally Posted by 533ogetnom View Post
i think your very confused all the cars u mentioned are similar after 3k (like i said)

the reason NA engines build torque as they move up in rev ranges is NOT because the engineers decided it would be good for the track, its because thats a characteristic of NA engines, as the revs increase more air is sucked into the cylinder than at lower revs due to the increased velocity of the intake flow (air is actually still flowing in even after the cylinder starts moving up might not make sense to you but thats how it works) provided everything is wide enough torque and hp can build to redline

if the engineers or trackers could, they would take that torque along the full rev range, you would be an idiot not to,

and "take a look at any formula 1 car" are you joking? f1 cars WERE turbo charged until the FIA banned them as one of their speed reducing saftey and cost cutting measures, in addition most racing series that allow turbos all the cars opt in for them

i do agree that sudden heavy peaky power is bad though, but as i said its not problem in the 335 because that peak is at 2k and if your worried about it during off to on throttle V2 isnt going to fix that.

and i dont agree, and no one in their right mind would, that you should limit your torque in lower revs so that you have an upsloping curve so you can more easily race around the track, thats just dumb
OK my man, you've gone to personal insults. I'm not getting sucked in.

Have a good one.
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      08-08-2007, 04:26 PM   #77
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Quote:
Originally Posted by silvrevo View Post
Its smart of Shiv to keep it simple. the K.I.S.S. method. With just using his Catback and Proceed, we get a positive result for the 335i's. No guessing.

400wrtq sounds awfully inviting! lol.

I cant wait to get my 335i,,, even thou Im going to miss the little Evo box.
Don't look back! the 335 is much smoother.
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      08-08-2007, 04:38 PM   #78
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I would also like to know if the slight torque reduction in mapping is intended for protection of the Steptronic, the manual, or both.
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      08-08-2007, 04:39 PM   #79
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I am psyched. I have had 4 major concerns about getting PROcede:
1) cost (great value -- I just never seem to have a spare 1.3k around...)
2) warranty
3) getting rest of the car set up to handle the additional power -- LSD, suspension, wheels/tires
4) power band -- the 2-3k peak in the V1.x was not what I was hoping for. V2 seems much more precise and controllable, more NA like, especially with the high end. This looks really good!

I just have to suck it up for #1&2
#3 is getting there
and now #4 seems to be taken care of. Woohoo! Does make you wonder why BMW AG did not do this in the first place...
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      08-08-2007, 06:16 PM   #80
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Why do people keep re-asking the same questions RE STEP vs MANUAL.

Shiv has said on at least 4 seperate occasions that he "knows" the Auto is good enough and not to worry.

if you trust him enough to bolt the gadget on, why don't you trust his info/judgment on the AT ?

SJ
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      08-08-2007, 06:43 PM   #81
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any updates on the dyno graphs?
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      08-08-2007, 06:47 PM   #82
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Quote:
Originally Posted by Serjames View Post
Why do people keep re-asking the same questions RE STEP vs MANUAL.

Shiv has said on at least 4 seperate occasions that he "knows" the Auto is good enough and not to worry.

if you trust him enough to bolt the gadget on, why don't you trust his info/judgment on the AT ?

SJ
+1

It's just simple psychology:
"I have MT, so there's no way AT could be better. It has_to_be/is slower/weaker/heavier/less_reliable/worse_at_all/whatever no matter what!"
or
"I have AT, so there's no way MT could be better. It has_to_be/is slower/weaker/heavier/less_reliable/worse_at_all/whatever no matter what!"
(check all that apply in your case)

At the end it does not really matter, what is the casus belli - AT/MT, Procede/TT/AA/RD, Borla/Eisenmann/RD/.../..., OZ/iForged/BBS/.../.../..., GoodYear/Michelin/Kumho/.../.../... or else, it's just a good guise to start the pissing contest and to ventilate some personal issues. There's no winner at the end, but someone is too simple to understand.

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      08-08-2007, 11:22 PM   #83
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Well this thread sure took a turn. Thanks for the update Shiv!!
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      08-09-2007, 12:10 AM   #84
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This thread made a wrong turn again.

Shiv, was supposed to post some information yesterday...i guess he is busy...
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      08-09-2007, 09:33 AM   #85
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Quote:
Originally Posted by heartpumper View Post
Has anybody installed this on a sedan yet???

Michael
The mods on the market now work with both 335i flavors: sedans and coupes. No difference.
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      08-09-2007, 10:00 AM   #86
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Quote:
Originally Posted by Serjames View Post
Why do people keep re-asking the same questions RE STEP vs MANUAL.

Shiv has said on at least 4 seperate occasions that he "knows" the Auto is good enough and not to worry.

if you trust him enough to bolt the gadget on, why don't you trust his info/judgment on the AT ?

SJ

Because of this from post 2.

Quote:
Originally Posted by shiv@vishnu View Post
Due to everyone's concerns with transmission longevity, we purposely limited torque to 380-390lbft although it would have happily made 400+lbft.
My car is ordered, but isn't scheduled for manufacturing in Germany until the end of the month, so I can make changes to it still. If there is a reason for concern regarding one transmission over the other when modifications continue to pile on, I would rather go with the unit that will be more robust in the long term.

All I want to know is which of the two transmissions he was referring to.
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      08-09-2007, 11:51 AM   #87
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Quote:
Originally Posted by shiv@vishnu View Post
Due to everyone's concerns with transmission longevity, we purposely limited torque to 380-390lbft although it would have happily made 400+lbft.
are we talking about WHEEL torque??
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      08-09-2007, 12:09 PM   #88
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Quote:
Originally Posted by Noize View Post
Because of this from post 2.



My car is ordered, but isn't scheduled for manufacturing in Germany until the end of the month, so I can make changes to it still. If there is a reason for concern regarding one transmission over the other when modifications continue to pile on, I would rather go with the unit that will be more robust in the long term.

All I want to know is which of the two transmissions he was referring to.
the manual is stronger, but hes not talking about either, hes talking about peoples concerns, if i were you i would go with wha you originally ordered and not worry about it, your going to trade it in in a few years anyway right

Quote:
Originally Posted by Panoz View Post
are we talking about WHEEL torque??
yea, better hold on to your ass
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