VANOS/double VANOS, VTEC/i-VTEC

[Han]

ahh... good point, josh.
but those motors have better intake systems (individual throttles)
and bmw is known for developing very good exhaust systems.
but that doesn't have anything to do with cams.
i'd say that if you put a VTEC system in those motors (theoretically, of course) they'd be putting out more power.

[Alex Mc]

Vanos does have some qualities smoothing the torque curve, etc.. but bottom line is you wouldn't even notice it hardly if it was removed, maybe on the S54 it has greater benefits, but the kick in the pants VTEC delivers on the hi-po motors is unmatched.

[Rob ITR1035]

so you're suggesting the difference in hp is based ONLY on the fact the NSX has vtec and the BMW motors have VANOS? good call man

they are completely different motors with a lot more differences than just the vvt system

[scottycs]

Why don't you compare them to US numbers?

Originally posted by Josh
With that said, I am going to play devil's advocate here, putting the merrits of both systems aside. If infact, VTEC is the better system, why is it out matched by BMW's Vanos equipped S50B32 and S54 motors with similar displacement as the NSX motor by a 30 to nearly 50 horsepower margin? Is there still advantage to the NSX motor over the two BMW motors mentioned?

[Josh]

Originally posted by Rob ITR1035
so you're suggesting the difference in hp is based ONLY on the fact the NSX has vtec and the BMW motors have VANOS? good call man

they are completely different motors with a lot more differences than just the vvt system

No. If you read what I wrote carefully you would see that I am asking if there are any other attributes and that also that I am making a broad generalization by playing an advocate.
If I were to make a conclusion, I would say, VTEC and Vanos aside, the real difference is BMW's ability to build a superior motor, which is undisputable. Although, certian technologies found in other make's motors may infact be better, it is apparent that there are more variables.

Let's keep this civilized, for your benefit.


scottycs, not that it matters as we are talking about engine differences, not nation boundaries, but is infact, the S54 found in US spec E46 M3's?

[Rob ITR1035]

Originally posted by Josh



No. If you read what I wrote carefully you would see that I am asking if there are any other attributes and that also that I am making a broad generalization by playing an advocate.
If I were to make a conclusion, I would say, VTEC and Vanos aside, the real difference is BMW's ability to build a superior motor, which is undisputable. Although, certian technologies found in other make's motors may infact be better, it is apparent that there are more variables.

fair enough, maybe BMW does in fact make 'superior' motors, but that is a seperate issue. This thread started out as a discussion between VANOS and VTEC, and frankly, i think thats been beaten to death. I definately think you would agree with me when I say that VTEC or VANOS or whatever is simply one aspect of a particular car, and that the entire package itself is more important that just what the valvecover says.


cool?

[Josh]

Originally posted by Rob ITR1035



.....the entire package itself is more important that just what the valvecover says.

[scottycs]

The s54 is, but what about the other 3.2 lacking 50 hp from the nsx??

Originally posted by Josh
scottycs, not that it matters as we are talking about engine differences, not nation boundaries, but is infact, the S54 found in US spec E46 M3's?

[AKUFC]

Vtec and Vanos are two different systems and ways of using VVT.

To those saying its a BMW its better cause it costs more.

I hope your joking a price tag doesnt mean shit it can have more powerful engine but you are talking about one particular system not the package so dont bring that up in a discussion about a system.

If we go by popularity than VTEC is better how often do you see other ricers slapping on Vanos on their Fords, cavaliers etc....

That is the same strength of a arguement as the price tag.

Price of a car doesnt mean everything is superior to a lesser priced car.

[/end rant]

[scottycs]

HAHA! Where can I get my VANOS DOHC sticker at???

Originally posted by AKUFC

If we go by popularity than VTEC is better how often do you see other ricers slapping on Vanos on their Fords, cavaliers etc....

[Han]

Originally posted by scottycs
The s54 is, but what about the other 3.2 lacking 50 hp from the nsx??

i think he was talking about the 321 hp 3.2 from the euro e36 m3 evo.

[Matt]

They're nearly the same, the s54 and the evo's s52. Both are dual VANOS, just like my mom's car

too bad the similarities end there.

[M3PiNoYdRiVeR]

Doesn't VANOS and VTEC just shoot up more fuel???

[Rob ITR1035]

Originally posted by M3PiNoYdRiVeR
Doesn't VANOS and VTEC just shoot up more fuel???

definately not. theres a good thread here explaining it. VANOS/double VANOS, VTEC/i-VTEC

[Matt]

LOL!