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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 > [[[[[[[[[ JB3 1.4 tune of the gods ]]]]]



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      09-05-2009, 10:29 AM   #45
SuPaSkillz
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Originally Posted by 1clean335i View Post
1.4 is definately nice.... I love the little vtec kick that comes in somewhere in the upper rpm range just before redline
I know im being picky...but around what rpm after 6k would you say it kicks in? Btw....your car is on point, you have very good taste.
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      09-05-2009, 06:36 PM   #46
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If 335 Had V-tec.. It would truly be impressive.
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      09-07-2009, 02:01 AM   #47
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isnt VANOS something like V-tec?
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      09-07-2009, 03:10 AM   #48
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Originally Posted by enrita View Post
isnt VANOS something like V-tec?
vtec was variable valve timing.

Originally 2 step (hence the 'kicks in' - you feel the switch over from low rpm appropriate timing to high rpm appropriate timing)

Now I believe it's continuous.

And I beleive the bmw style is also continuous.



I thought VANOS was something different - like it got rid of the throttle and just used valves alone to control air intake.

(correct me if I'm wrong... not like I looked into this stuff)

-scheherazade
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      09-10-2009, 01:01 PM   #49
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hey NOSS//M do you have Kelvin's info, I need him to burn my jb3 chip to the latest map
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      09-10-2009, 01:55 PM   #50
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Quote:
Originally Posted by scheherazade View Post
vtec was variable valve timing.

Originally 2 step (hence the 'kicks in' - you feel the switch over from low rpm appropriate timing to high rpm appropriate timing)

Now I believe it's continuous.

And I beleive the bmw style is also continuous.



I thought VANOS was something different - like it got rid of the throttle and just used valves alone to control air intake.

(correct me if I'm wrong... not like I looked into this stuff)

-scheherazade
Since u insisted correction. VANOS is the technology BMW uses to control both camshafts for better exhaust and intake efficiency. Better idles, more torque and power, etc. Valvetronic is what you mixed up with VANOS which is where BMW is able to control valves precisely enough to eliminate any need for butterfly valves in the throttle.
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      09-10-2009, 02:13 PM   #51
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Quote:
Originally Posted by scheherazade View Post
vtec was variable valve timing.

Originally 2 step (hence the 'kicks in' - you feel the switch over from low rpm appropriate timing to high rpm appropriate timing)

Now I believe it's continuous.

And I beleive the bmw style is also continuous.



I thought VANOS was something different - like it got rid of the throttle and just used valves alone to control air intake.

(correct me if I'm wrong... not like I looked into this stuff)

-scheherazade
VTEC is variable valve timing and lift control and yes, it was a 2 stage method. At a certain RPM, a pin would lock the main rocker to another, via oil pressure controlled by a solenoid, which was following completely different, and hotter, lobe profile. As shown below, you can see it occuring at 4800 RPM and was felt on the road.

i-VTEC was later added to many models which includes continous valriable valve timing. But the change in the lift still occurs as mentioned above.

VANOS is a continuous control of the valve timing only. BMW's Valvetronic uses continuously variable valve lift, from abotu 1mm to about 10mm and anywhere in between.

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      09-10-2009, 05:24 PM   #52
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hey NOSS//M do you have Kelvin's info, I need him to burn my jb3 chip to the latest map
yeap i have his cell phone, si vas al meet hoy puedes ver como se siente yo lo tengo en mi carro
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      09-10-2009, 05:47 PM   #53
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Originally Posted by //NOSS-M View Post
yeap i have his cell phone, si vas al meet hoy puedes ver como se siente yo lo tengo en mi carro
Are you going to FUDD's tonight or Tropical?
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      09-10-2009, 06:57 PM   #54
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Are you going to FUDD's tonight or Tropical?
fudd's
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      09-10-2009, 09:11 PM   #55
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Steve, is this your old SC'd CLS?
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      09-10-2009, 11:01 PM   #56
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Not much to add except that there is no Valvetronic on the N54. It is on the N52 though and it will be in the N55.

All have double VANOS.
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      09-11-2009, 08:20 AM   #57
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Steve, is this your old SC'd CLS?
Yep, Run 5 was before I designed and made the Liquid/Air IC. Run 27 was with the IC but through the stock exhaust. Run 29 had the exhaust cutout open. Pretty predictable power curve and semi-useful with the short gearing the 6MT had. Unfortunately it was tied to the wrong end of the car and chassis.

If only Honda/Acura would make a proper RWD vehicle (with more seats than the S2000) as they can make a fine engine and manual tarnsmission.
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