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      11-18-2007, 01:48 PM   #1
mkiiieustyle
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how far has the 3.5 turbo been pushed?

does anyone know how much boost these motors can take without crackin the motor open. also how fast are they with mods?
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      11-18-2007, 01:55 PM   #2
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Well - it's a 3.0L, not a 3.5L (see the N54 sticky on this forum) and you might want to go to the e90 website to see what folks have done with their 335i coupes/sedans. There are folks that contribute to this site that own 335i coupes, I'd suspect than can contribute a bit to this.
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      11-18-2007, 03:59 PM   #3
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Some people have hit 400 rwhp with stock turbos and fuel (Just software tuning and basic breathing mods.)

Similar to a Toyota 2JZ-GTE engine in what it can do without getting your hands too dirty.
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      11-19-2007, 09:56 AM   #4
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3.5?? that would be sweet!!!! LMAO!!!!
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      11-20-2007, 09:23 PM   #5
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3.5? I want another 50 hp out of it then.
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      11-20-2007, 09:55 PM   #6
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my bad i have tirrets.....ah SHIT
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      11-21-2007, 02:38 AM   #7
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it's okay I am dyslexic
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      11-21-2007, 10:35 AM   #8
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And for the record...

128/238/528 are not 2.8's, they are also 3.0's...

Not sure about the e60 525, but the e90 325i (2006 only) was also a 3.0...

Just over 400hp on 98 octane is all I've seen from the 3.0 TT on e90post.com...
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      11-21-2007, 07:46 PM   #9
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damn is that all..... guess it's not been long enough for a large aftermarket support group yet. i guess when the 1'er is released there should more of an influx of mods.
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      11-21-2007, 08:02 PM   #10
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i Cant wait till they swap a GT35R on it lol. Now then will see some power. Enough to play with HorsepowerFreakes Turbo E46 M3. HEHEHEHE
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      11-21-2007, 11:18 PM   #11
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Quote:
Originally Posted by mkiiieustyle View Post
damn is that all..... guess it's not been long enough for a large aftermarket support group yet. i guess when the 1'er is released there should more of an influx of mods.
Thats on stock turbos...

Just intake/exhaust/tune and 98 octane I think but I didnt read the whole thread...
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      11-22-2007, 05:21 AM   #12
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lol i cant wait untill someone puts 600whp to that engine and still keep the look of the car stock lol so people shit bricks when u go flying off da line lol
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      11-22-2007, 10:52 AM   #13
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Quote:
Originally Posted by imola.zhp View Post
Thats on stock turbos...

Just intake/exhaust/tune and 98 octane I think but I didnt read the whole thread...

damn that's kinda crappy in my oppinoin i thought all you needed was an exhaust and computer to put atleast 400 to the wheels, i'm going from what i have seen on the vishnu website. the reason why i'm soo disappointed i guess is because i know for a fact the a twin turbo supra can put out 550-600 whp on stock turbo's....... how big are the turbo's anyway? i'm guessing there gonna be pretty small concidering the torque curve i've seen for this motor, starts at like 15-1800 rpms.
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      11-22-2007, 11:18 AM   #14
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Quote:
Originally Posted by imola.zhp View Post
Just over 400hp on 98 octane is all I've seen from the 3.0 TT on e90post.com...
Quote:
Originally Posted by mkiiieustyle
damn that's kinda crappy in my oppinoin i thought all you needed was an exhaust and computer to put atleast 400 to the wheels,
Imola, don't forget that that was 400 to the wheels. Vishnu's PROCede, some exhaust mods and 98 octane.

And of course it's "kinda crappy" but the limits they are finding are caused by the same reason this engine has so many excellent reviews. The small turbos keep the N54 feeling like a BMW and not a Supra.

Quote:
Originally Posted by everybody
turbo's
Stop the apostrophe abuse.
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      11-22-2007, 11:33 AM   #15
mkiiieustyle
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yeah but i'm not gonna keep it "feeling like a BMW" i want the car faster. have you ever drivin/modded a supra with stock turbos? it spools up really well especially if you have opened up the exhaust and intake, it's the gearing on the supra that keeps it from pulling like it should, it's best on the highways/straights of a long track, i just was expecting more i guess, 400 with just ecu and exhaust is good but i was expecting more power to have been put down by now, the 335i has been out for what a year now i was expecting a tuner company to have takin it alittle further than 400 at the wheels.
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      11-22-2007, 11:44 AM   #16
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Quote:
Originally Posted by mkiiieustyle View Post
i was expecting more power to have been put down by now, the 335i has been out for what a year now i was expecting a tuner company to have takin it alittle further than 400 at the wheels.
I mentioned in another thread the issue with the N54 and its minuscule turbos. They are small for two reasons: first, because BMW wanted the engine to behave in a certain way, second, because there just isn't that much room. People are investigating what they can do within the confines of the stock housings, because cramming larger turbos under the hood has been shown to be difficult.

Go read up on http://www.e90post.com/forums/forumdisplay.php?f=58 People are doing everything they can to get the most out of this engine which clearly has a lot of potential.
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      11-22-2007, 01:08 PM   #17
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Yes, 400 rwhp, which is somewhere around 450 HP at the crank.
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      11-22-2007, 03:39 PM   #18
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Quote:
Originally Posted by mkiiieustyle View Post
yeah but i'm not gonna keep it "feeling like a BMW" i want the car faster. have you ever drivin/modded a supra with stock turbos? it spools up really well especially if you have opened up the exhaust and intake, it's the gearing on the supra that keeps it from pulling like it should, it's best on the highways/straights of a long track, i just was expecting more i guess, 400 with just ecu and exhaust is good but i was expecting more power to have been put down by now, the 335i has been out for what a year now i was expecting a tuner company to have takin it alittle further than 400 at the wheels.
Keep in mind the N54 is direct injection which makes fueling MUCH more difficult then popping in 1000cc injectors. Also, the Supra has two larger turbos in a sequential setup instead of parallel. This gives the Supra alot more top end. Finally, the 2JZ is an iron block w/ strong internals that can take more boost and HP than the N54 ever will be able to.

VF Engineering has been working on a turbo kit for the N54. Almost no information is available about it and it is probably a year or so away. They will probably have a kit to push stock internals to the safe limit as well as a kit w/ upgraded internals.
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      11-22-2007, 08:23 PM   #19
mkiiieustyle
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direct injection has been out for a little while also VW has had it on the mkv's for a while but yet still manage to pull more power from there 2.0t, i know fully what the supra motor is and it's setup, i just test fit a 2jz into a 96 240sx ( just after fitting my buddies rb25 into his 91 240sx), i didn't know that space was really an issue with these vehicle's...... like i said before i guess when the 1er is released there will hopefully more companies wanting to make parts for performance,
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      11-28-2007, 09:31 PM   #20
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Shiv over at vishnu, who was the first to tune the 335, has gotten over 400whp. This is with his V2 tune, which is still in beta testing and few people have it. There are issues with this tune right now though. IIRC it is supposed to operate at 13-15psi, but people with boost guages have seen spike of up to 22psi, which is far from healthy for the baby turbo's. Many of the beta testers are very unhappy with this, but I am sure it is being cleaned up. I doubt the final production V2 tune will produce 400whp, but maybe very close. The problem with the N54 is the fueling. With the V2 it is running at approx. 80-85% load, which is not good for every day. There are other tunes which dont increase the hp as much, but still make a noticeable difference (40-50whp for the 379$ juicebox which will fit the 135i). If you want the big numbers then a turbo swap will be necessary. With a turbo swap you will need a new fuel injectors.
There is a lot of information for the n54 over at www.e90post.com regarding the tuning capabilities.
Just to give you an idea of how small the turbo's are...
http://www.e90post.com/forums/showthread.php?t=78155
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      11-29-2007, 12:02 AM   #21
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Quote:
Originally Posted by acrain View Post
Shiv over at vishnu, who was the first to tune the 335, has gotten over 400whp. This is with his V2 tune, which is still in beta testing and few people have it. There are issues with this tune right now though. IIRC it is supposed to operate at 13-15psi, but people with boost guages have seen spike of up to 22psi, which is far from healthy for the baby turbo's. Many of the beta testers are very unhappy with this, but I am sure it is being cleaned up. I doubt the final production V2 tune will produce 400whp, but maybe very close. The problem with the N54 is the fueling. With the V2 it is running at approx. 80-85% load, which is not good for every day. There are other tunes which dont increase the hp as much, but still make a noticeable difference (40-50whp for the 379$ juicebox which will fit the 135i). If you want the big numbers then a turbo swap will be necessary. With a turbo swap you will need a new fuel injectors.
There is a lot of information for the n54 over at www.e90post.com regarding the tuning capabilities.
Just to give you an idea of how small the turbo's are...
http://www.e90post.com/forums/showthread.php?t=78155

cool man thanks, i really thought that the turbo's would have been bigger, but let's just hope that they can be hybrided, i know when i had my 626 turbo they came stock with a IHI RHB25 turbo, what most people did was just use the compressor wheel and housing from a bigger IHI turbo and kept it at 3-5psi above stock but because the new setup pushed more CFM's there were damn good gains.
thanks for the post it really helped alot.
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      11-29-2007, 01:39 AM   #22
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Quote:
Originally Posted by mkiiieustyle View Post
cool man thanks, i really thought that the turbo's would have been bigger, but let's just hope that they can be hybrided, i know when i had my 626 turbo they came stock with a IHI RHB25 turbo, what most people did was just use the compressor wheel and housing from a bigger IHI turbo and kept it at 3-5psi above stock but because the new setup pushed more CFM's there were damn good gains.
thanks for the post it really helped alot.

0~60mph in 4.0 seconds is pretty good for a stock motor with a piggyback. How much more faster do you need it for the need to be upgrading the turbos...? Unless "draging" is a hobby or spoty for you, id say PROcede/Dinan type mods, along with tyres and suspension is perfect.

Why mess with a 4 seconds engine..?
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