SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
|
#1
|
|||
|
|||
Limitations of the hydraulic valvetrain
Hello people,
I've been around for a while now, read a lot of threads but I am not much of a poster. I have a curious question for the mechanical gurus, what do you think is the limitation of the hydraulic system? do you think that with the correct springs, it can hold around 10.5~11mm of valve lift? awaiting for your replies, thanks. E.
__________________
The SVX expansion goes two ways: 1. Horizontal expansion: Multi SVXi 2. Vertical expansion: Fun max from one SVX |
#2
|
||||
|
||||
Re: Limitations of the hydraulic valvetrain
Quote:
Tom |
#3
|
|||
|
|||
Re: Limitations of the hydraulic valvetrain
springs coilbind matter resolved.
what do I need to do with the valves? new taller ones? E.
__________________
The SVX expansion goes two ways: 1. Horizontal expansion: Multi SVXi 2. Vertical expansion: Fun max from one SVX |
#4
|
|||
|
|||
Re: Limitations of the hydraulic valvetrain
Quote:
i only ask this as a person seeking info, not as someone trying to cause problems.
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin blk 92' LSL w/ average mods pics here http://s306.photobucket.com/albums/nn277/yourconfused/ Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person." |
#5
|
|||
|
|||
Re: Limitations of the hydraulic valvetrain
Quote:
i have access to many springs sizes, mostly beehive. i can get the valve length easily no problem. the thing is the svx valvetrain i have no experience in. my original question was to know what you folks think as experts in this car. i am aiming to a very high valve lift in my turbo setup. i just want to know what to look at inside the valvetrain. doesn't valve length affect the cam lift? meaning with taller valves, i cannot lengthen the lobes anymore? wow, too late here, need to sleep, gn!
__________________
The SVX expansion goes two ways: 1. Horizontal expansion: Multi SVXi 2. Vertical expansion: Fun max from one SVX Last edited by Giugiaro; 05-13-2009 at 01:59 AM. |
#6
|
||||
|
||||
Re: Limitations of the hydraulic valvetrain
The issue with running taller valves is you'll either need to gut the hydraulics and convert to solid followers, or shorten the base circle of the camshafts appreciably. A smaller overall lobe will have greater stresses imparted to it and to the cam followers.
If you are going with much higher lift than stock, then presumably the shape of the lobe is far more aggressive. A more aggressive lobe *may* run into problems with the hydraulic adjusters. There's a lot of mass there for the lobe to toss around, so you may in fact encounter some issues with valve float that you wouldn't see with a stock cam profile. Strictly speculation on my part, but be aware you may be doing a lot of R & D to find out! |
|
|