DELPHI-Variable Cam Phaser

[ARG3DOHC]

God I hope someone has done this.
DELPHI makes the Variable Cam Phaser actuators for GM ,See;

http://delphi.com/manufacturers/auto/powertrain/gas/valvetrain/vcp/

Has anyone converted a 3.4DOHC to use thise system on the CAMS ?
TTHis might make for a very interesting perf upgrade to a 3.4 .
Cheers...Rich

[pocket-rocket]

That's a neat idea, but no one has done it. Besides, it's on the 3.6 DOHC in the Cadi's and new Camaro (and probably various other cars- in fact, I think that pic of it is from the 3.6 DOHC) already, and if you did do it, how would you control it on the fly?

[ARG3DOHC]

That's a neat idea, but no one has done it. Besides, it's on the 3.6 DOHC in the Cadi's and new Camaro (and probably various other cars- in fact, I think that pic of it is from the 3.6 DOHC) already, and if you did do it, how would you control it on the fly?

HI Pocket Rocket;
I read the spec sheets from DELPHI's web site , they where off course typically unhelpfull in thier email response , indicating I should talk to my vehicles manufacturer.
Like thats going to get me anywhere.
ANyway , according to what could glean from the spec sheets, the CAM Phaser's use a PWM amplifier control system that gets the info from an ODB spec engine management.
By the looks of it its using a control pulse from the CAM sensor and crank sensor to determine cam position , then uses the control set within ints controller to change cam dwell on the fly. According to DELPHI's sitte that also have a new ECM that is usable on 4,6 or 8 cylinder engines and as far as I can tell is fully programmable.
DELPHI told me that none of this stuff is available as aftermarket , I told them they would sell a hell of a lot more and have better development feedback if they did.
But what do I know right Im just a backyard mechanic.
There is a British Company that custom makes Variable valve trains and controllers , mostly for racing , but they serious coin for thier system .

[ARG3DOHC]

Maybe at this point it would more valuable to just go find a new CADI 3.6 and drive train and replace the 3.4 in my GTP until I win the lottery and have the money to properly rebuild the 3.4 . LOL

[ARG3DOHC]

THe more I search the web the more interesting stuff comes up.
For example check this out from Borg Warner;

http://www.atzonline.com/index.php;do=show/site=a4e/sid=17202958754d597d425a564749004735/alloc=1/id=9243

[ARG3DOHC]

THe more I search the web the more interesting stuff comes up.
For example check this out from Borg Warner;
http://www.atzonline.com/index.php;d...lloc=1/id=9243

OH man, I found another one . THis is a patent for a magnetically controlled valve actuator.
I thought of this about 20 yrs ago . to bad I didn't patent it. :-{
Here's a link to the patent document thats recently been ;

http://www.google.com/patents?id=Y3KBAAAAEBAJ&printsec=abstract&zoom=4&source=gbs_overview_r&cad=0#v=onepage&q&f=false

Yep engines are going to radically change in the not too distant future.....SAY goodbye to your cams .
Regards...Rich

[Jonpro03]

FWIW, the Megasquirt community is working on code for the variable cam phaser found on 3500s and 3900s. It's a couple of months off though.

[Dave96z34]

I toyed with the idea but there no real good way to drill the cam for oil passages and also get the oil pressure to the 2 oil passages. If it were to be done you would have to make a new cam carriers and cams to go with the rotary actuators. Be cheaper just to go boosted.

[Joseph Upson]

OH man, I found another one . THis is a patent for a magnetically controlled valve actuator.
I thought of this about 20 yrs ago . to bad I didn't patent it. :-{
Here's a link to the patent document thats recently been ;

http://www.google.com/patents?id=Y3KBAAAAEBAJ&printsec=abstract&zoom=4&source=gbs_overview_r&cad=0#v=onepage&q&f=false

Yep engines are going to radically change in the not too distant future.....SAY goodbye to your cams .
Regards...Rich

You would have still been too late, as it was around that time or earlier that I recall an inventor suing one of the automakers over his variable valve lift mechanism which he demonstrated on television and I do believe it was electric. Perhaps that caused some of the hold up for its appearance in domestic vehicles.

The available systems are far too complicated to retrofit to the 3.4L, GM had some problems with the first design motors and chain stretch then there's the oiling system that has to be a pretty efficient/consistent design to help maintain VVT calibration. Something as simple as valve spring changes and oil wt can affect it. It definately needs the OE PCM for control and in my experience with the motor, it should probably have a PCM for each cylinder bank because sometimes it seems the single PCM can't keep up (a hiccup nearly got me run down pulling on to the interestate).

Auto diagnostics is a good field to be in now days if you can actually keep up with the learning curve the increasing technology demands.

[pocket-rocket]

I remember in the mid 90's being in high school and reading in Popular Mechanics how Mercedes was developing a system that used solenoids to control the valves.