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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > The truth about the N55 engine begins to surface ?



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      01-25-2010, 12:47 AM   #23
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you guys are complaining about a little turbo lag...my shit spools at 5000 RPM...LOL
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      01-25-2010, 08:11 AM   #24
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Question

Will the Procede work with the new 335is?
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      01-25-2010, 08:34 AM   #25
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Quote:
Originally Posted by AltecBX View Post
Will the Procede work with the new 335is?
It would be very dangerous because of the overboost function. If the stock tune is boosting 14.5 psi for the 7 seconds, imagine what a Procede map value of +5psi would do to your car...

Your best bet for 335is would be something like JB+ turned to a maximum of 2psi (in order for the boost to never cross the 16.5psi barrier).
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      01-25-2010, 08:38 AM   #26
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Quote:
Originally Posted by cstavaru View Post
It would be very dangerous because of the overboost function. If the stock tune is boosting 14.5 psi for the 7 seconds, imagine what a Procede map value of +5psi would do to your car...

Your best bet for 335is would be something like JB+ turned to a maximum of 2psi (in order for the boost to never cross the 16.5psi barrier).
I am sure Shiv and Terry will find a way to compensate for this but they have their work cut out for them....They also have their work cutout for them with the N55 platform which I heard Terry has already ordered the 2011 with the N55 engine...
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      01-25-2010, 08:39 AM   #27
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Quote:
Originally Posted by cstavaru View Post
It would be very dangerous because of the overboost function. If the stock tune is boosting 14.5 psi for the 7 seconds, imagine what a Procede map value of +5psi would do to your car...

Your best bet for 335is would be something like JB+ turned to a maximum of 2psi (in order for the boost to never cross the 16.5psi barrier).
But with the Procede reading data from the canbus, wouldn't it determine what pressure to boost too if the car is making a certain boost to begin with. And ain't the 335is making higher boost just at launch?
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      01-25-2010, 09:09 AM   #28
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Quote:
Originally Posted by cn555ic View Post
I am sure Shiv and Terry will find a way to compensate for this but they have their work cut out for them....They also have their work cutout for them with the N55 platform which I heard Terry has already ordered the 2011 with the N55 engine...
Of course, if they choose to tune the 335iS platform probably both tunes would work with special maps and care from the tuners I was referring to the actual form of the tunes, because I am in the same situation, I have the Power Kit installed and would like to try the JB3. I have asked for some tuner support but they just say "it should work"...what I expect is special maps which would make the car behave identical to stock + JB3 instead of adding boost over the Power Kit boost and making things dangerous.

But it's all about profitability. Is there a market for tuning cars with Power Kit or 335iS cars ? Are there enough cars sold ?

If you ask me, I am reluctant to say if the tuners would see a market for factory-modified N54 engines. They will concentrate on the N55 instead, because many more N55-based cars will be sold compared to N54-based.

The alternative to lack of piggyback support is to just wipe the factory tune and replace it with GIAC or some other flash...which is what I might do at some point since my (2-year only) warranty runs out this autumn.

Last edited by cstavaru; 01-25-2010 at 09:38 AM.
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      01-25-2010, 09:12 AM   #29
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Quote:
Originally Posted by cstavaru View Post
Of course, if they choose to tune the 335iS platform probably both tunes would work with special maps and care from the tuners I was referring to the actual form of the tunes, because I am in the same situation, I have the Power Kit installed and would like to try the JB3. I have asked for some tuner support but they just say "it should work"...what I expect is special maps which would make the car behave identical to stock + JB3 instead of adding boost over the Power Kit boost and making things dangerous.

But it's all about profitability. Is there a market for tuning cars with Power Kit or 335iS cars ? Are there enough cars sold ?

If you ask me, I am reluctant to say if the tuners would see a market
I don't see why it wouldn't work in your car with the power kit...what does the kit add to the performance other than upgraded oil filter? Does it reflash the ECU, if not you should have no problems IMO
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      01-25-2010, 09:39 AM   #30
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Quote:
Originally Posted by cn555ic View Post
I don't see why it wouldn't work in your car with the power kit...what does the kit add to the performance other than upgraded oil filter? Does it reflash the ECU, if not you should have no problems IMO
Yes, the power kit reflashes the ECU and adds about 1 psi of boost.
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      01-25-2010, 09:53 AM   #31
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Quote:
Originally Posted by cstavaru View Post
Yes, the power kit reflashes the ECU and adds about 1 psi of boost.
If it only adds one psi of boost, I know Procede will allow you to dial in the targeted boost levels that you want to see, so I don't see why it wouldn't work...With the Jb3 tune I am not sure if this is possible to set a certain targeted boost level using the software provided to do at home
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      01-25-2010, 12:17 PM   #32
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it seems following this article that the N55 is there only for pollution bulshit:
http://www.germancarzone.com/5-serie...reviews-7.html
3.0-LITER, DIRECT-INJECTION TURBO SIX

The new 5 Series Gran Turismo marks the first application of BMW's new single turbo, direct-injection, 3.0-liter straight six with Valvetronic variable valve timing. The engine has 3.53-inch bore and a 3.31-inch stroke and a 10.2:1 compression ratio. It develops 300 horsepower at 5800 to 6250 rpm, and 300 pound-feet of torque between 1200 and 6000 rpm. The decision to go to a single, twin-scroll turbocharger was driven by the need to meet forthcoming Euro6 and American SULEV emissions while retaining the responsiveness of a twin-turbo setup. The single-turbo layout allows closer placement of the catalytic converter for faster light-off. (The tough new Euro6 test means the catalytic converter has to be hot enough to be scrubbing exhaust emissions just seven seconds after the engine is started; BMW also utilizes a dual-wall exhaust manifold for maximum heat retention.) The twin-scroll layout funnels the exhaust gases from cylinders one through three and four through six to two separate turbines, ensuring an exhaust pulse hits each every 120 degrees of crankshaft rotation, as in a twin turbo setup, minimizing pulse interference and maximizing the energy transfer.
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      01-25-2010, 12:21 PM   #33
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and YES they finally did white led angel eyes

Was it so difficult for bmw to understand that we need this for a fresh hi tech design
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      01-25-2010, 12:35 PM   #34
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Quote:
Originally Posted by cn555ic View Post
If it only adds one psi of boost, I know Procede will allow you to dial in the targeted boost levels that you want to see, so I don't see why it wouldn't work...With the Jb3 tune I am not sure if this is possible to set a certain targeted boost level using the software provided to do at home
The problem is, the boost is not added in a linear fashion (stock + 1psi), but only in some areas of the RPM band...
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      01-25-2010, 12:58 PM   #35
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Quote:
Originally Posted by supracg View Post
If the n55 can create more power at the high rpms, why does the iS essentially have the n54 engine?
I have to agree with this statement. BMW is trying to minimize the tuning of the 335's by slapping a new engine in there that includes valvtronic, which from what i've heard can make tuning the car more difficult. And from one of the tuners, I have also heard that we will most likely not see massive gains from the N55 like we are seeing in the N54.
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      01-25-2010, 01:54 PM   #36
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Terry has already ordered a N55 135i
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      01-25-2010, 03:59 PM   #37
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Quote:
Originally Posted by Sniz View Post
I would expect the n55 to have a little less low end grunt, but be surperior up top where it really helps for performance reasons.

a n54 powered vehicle can certainly pull my M3 on low end rpm pulls, but once i'm spooled, good bye.

same idea but the n55 wont be as laggy as a larger turbo for many reasons, twin scroll and valvetronic being 2 of the main ones.
Really? Didn't feel like it to me. Your M3 had thew sledgehammer effect I have not felt with any 335, even taking off onto the highway. I could be wrong but it sure did not feel like any 335 was going to pull you in the low end.
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      01-25-2010, 04:54 PM   #38
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"But the benefits of twin-scroll design don’t end there. With its greater volumetric efficiency and stronger scavenging effect, higher ignition delay can be used, which helps keep peak temperature in the cylinders down."

Is this a key to the n55 engine? We all know the n54 tends to run hot and have major heat issue when pushed. Would the twin-scroll reduce the number of heat related "limp mode" problems?

What I wonder is if the n55 is really 300hp. Everything I have seen, including my own experience, says the n54 is more like 325-330hp. So a 300hp may be a 25-30hp decrease?

Either way, I am going to take good care of my n54 335i.
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      01-25-2010, 04:59 PM   #39
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Quote:
Originally Posted by vase330 View Post
Really? Didn't feel like it to me. Your M3 had thew sledgehammer effect I have not felt with any 335, even taking off onto the highway. I could be wrong but it sure did not feel like any 335 was going to pull you in the low end.
hey man, by low end I mean 2,000 to 2,800rpms.....after that I'm spooled and you know what happens
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