secondary technology

[Isaac]

Ok, maybe in wrong thread...if so move....BUT
I am curious as to if there are any engines that have been made with technology that "opens" a "secondary" set of air intake devices (besides the GEN 1/2/3 SHOs). I am not a motorhead (and quite mechanically uninclined) so maybe what I am talking about exists in other guises soooooooo....... It's just that I never saw anything like my 94 under the hood and it seems so intelligent I was wondering.......

 

[twr]

Yes - there are quite a few now that use it.

 

[Isaac]

Ok, more questions...
1.) like who???

2.) Was Yamaha first???

3.) Only possible with fuel injection???
(this might betray how much I really don't know)

 

[twr]

Mitsubishi, Honda, and a lot more.

Not sure if Yamaha was the first or not - Think so.

Not practicle on a carburatored engine.

 

[Isaac]

Hey, thanks alot!!
I LOVE 4,000RPM!!!
I taught my wife how to
listen for it when she
drives and she said she
never heard it...I was freakin
out until I drove with her next
day and showed her what I meant
and she said "Oh, I never go that
high..." I'm thinkin' Oh, I'm
not suprised...

 

[SHOZ123]

Almsot all the newer Ford motors use this. Yamaha held the original patents though IIRC.

 

[luigisho]

BMW is coming out with adjustable length intakes-adjusts while you're driving.

 

[jelloslug]

The Chrysler 2.7L V6 has adjustable length runners. It works fairly well but it doesn not had as much torque as the Yamaha (or HP eather 200HP, 195 ft/lb)

 

[TVSHO]

Isaac...keep in mind Yamaha designed our V6 15 yrs ago and many technological advancements have happened since. Keep an eye on any manufacturer who races F1; Ford, Ferrari, BMW, MB, Honda, Toyota, and others. They leverage a lot of interesting performance advancements into their street cars.

Tom
'94 ATX

 

[Emerald94]

I drove an Intrepid for a month when my baby was in the body shop and it sure as **** didn't feel like 200 hp! You had to rev the bejesus out of it to get decent momentum, kind of like a Honda motor!

jelloslug:
The Chrysler 2.7L V6 has adjustable length runners. It works fairly well but it doesn not had as much torque as the Yamaha (or HP eather 200HP, 195 ft/lb)

 

[SHOLOVER]

Many companys now use variable intakes I believe bmw has quite a bit of adjustability and it occurs with out the driver noticing the new focus svt uses one it looks like a snail when viewed from the side. fo racing applications it is sometimes considered a bit useless in engines that are going to operate at extreme rpms were the designers would the tune the manifold for that rpm by the way did you guys hear bmw f1 motor broke the 18k rpm barrier now thats what i call spinin eek! burn_out

 

[RI-SHO]

Speaking of technology does anyone know where to get articles about "New Technology", I remember reading a few months back an article about cam-less engines. Where the opening/closing of the valves will be controlled by magnets and have a starte-less system where the ECU remembers what piston fires last and completes the order when it needs to start again. Pretty cool stuff but it seems like upper class cars like BMW Mercedes will introduce this to there high class models first then move down, just think duration/lift can all be adjusted electronically burn_out .

 

[jelloslug]

I drove an Intrepid for a month when my baby was in the body shop and it sure as **** didn't feel like 200 hp! You had to rev the bejesus out of it to get decent momentum, kind of like a Honda motor!

Its the base engine in the Intrepid. Try it in a Stratus R/T w/ a 5 speed, its a bit different. I can imagine that Intrepid you drove would be a bit like the SHO V6 in a Crown Vic.

<small>[ October 01, 2002, 02:40 PM: Message edited by: jelloslug ]</small>

 

[Isaac]

1.) RI-SHO if you can dig that up I would LOVE to see how that camless engine would be set up. I would need visuals to picture that... eek!

2.) Soooooooooooo........we all drive a engine that debuted technology years ago that these days is common place......D**m I feel pretty special....I'm gonna broadcast that fact TO EVERYONE who has the misfortune to ask about my car...(and there are some).......

 

[RI-SHO]

Theres a 1.5MB PDF I found going through about Varible Valve timing to camless now I lost i'll find it again and post the link.

Meanwhile here is a screen shot I took from one of the images in the PDF model:

There also a diesel version with hydralic actuaters already being tested, article here: http://www.dieselnet.com/news/0004navistar.html

<small>[ October 01, 2002, 03:42 PM: Message edited by: RI-SHO ]</small>

 

[shojuan]

Porsche has been doing it for a while. They call their system Varioram. Not to be confused with Variocam which is variable valve timing.

Rick

 

[RI-SHO]

shojuan:
Porsche has been doing it for a while. They call their system Varioram. Not to be confused with Variocam which is variable valve timing.

Rick

You sure its camless? Because it seems from everywhere I read its a new radical idea. Not saying your wrong just wanted to know where you got your info.

 

[shojuan]

Oops. eek! I was talking about dual induction systems like our SHO. Sorry about the confusion. WRT to the camless valves, I wouldn't want that in my car until it's been proven on the streets for 10 years. Of course it will be well tested for reliability in house before a street car uses it, but stuff has a way of popping up in the real world, in the hands of consumers. It's a neat idea though. Hope it can be developed into something with rock solid reliability. Sure would be neat to be able to change your valve profile with software.

Rick

 

[pete c]

pneumatic valve springs are another idea that is being played with. This would allow for varying the pressure and therefore spring tension with revs. Electromagnetic control of valves is also being developed. It will allow the driver to go from full race cam to daily driver at the push of a button or stomp of the throttle. This should allow for great gas mileage and huge performance gains. Whether or not this system can be made reliable is another question.

 

[RI-SHO]

Its already being tested on Internation Diseal engines, some advantage they mention is 40% more torque right at clutch engagement, less noise with the quieter method that is used to open/close the valves and a more efficent engine compared to older mechanical technology.