Hey guys,

I was looking around and found this site. Www.hotrocker.com
What do you guys think?

It looks cheesy to me but the idea is a good one. Vette magazine is going to test them out and publish the results.

It looks good and stuff. It costs 1000 bucks.

Just letting you know.
:lala: :lala: :lala:

 

that system is variable lift, not timing.

but it is still pretty cool stuff, i saw an article about them about a year or two ago.

 

Variable ratio would be a better term maybe, it will affect the timing of the opening and closing events a bit. I've been waiting for someone to review it.

 

I've got to tell you, that setup doesn't seem like a winner. I used to have a 300ZX with variable valve timing. It had four cams, all variable (rather than VTEC, Variable Timed Exhaust Cam). The way this works is that at high RPM, the cams completely change shape, this is done with a cam with progressive grinds that moves in and out. What you're looking at would only vary the rocker ratio (if it even works), but I can't see why you would even want the smaller end, why not just swich rockers to a bigger, fixed ratio? What I'm saying is, if this technology is so great, why aren't Crane and Comp offering it?

 

Its making the cam act smaller therefore making it less radical at idle / low rpm. In theory it could take a car that idles at 8" of vacuum and make it idle at like 11 or 12... also giving you back some lost low end torque so the car would pull harder below the 3000-4500 rpm point where a motor like this would normally start pulling. Probably get you some better gas mileage as well. It's allowing someone to run a bigger cam w/o sacrificing as much.

I think the theory is sound and I'm sure it works but the packaging is a bit awkward and I'd question durability.

 

I thought VTEC stood for Variable Timing Electronically Controlled?

 

yeah

 

I cant wait for electronicly controlled valves (no valvetrain)

 

I think vtec has a cam shaft. IT just turn oer to eletronicly controled at high rpms.

 

why who said it didnt?

 

when I read it then the comment below I thought that is what was ment.

 

i remember reading about ferarri's new "variable balistic valve" somehow they found a way to use valve float in their favor.

 

last thing i read about VTEC is this:

its a 2 rocker arm per intake valve setup. 1 rocker is low lift, the other is high lift. simple. the computer just switches over to the second rocker at higher rpms to give the extra life/duration the engine needs. the cam only has 2 lobes however, the computer just uses some sort of hydroulic mechanism to switch rockers. I've never seen this in person, I just read about it in some mag and could be WAyyyyy off. just thought i would let everyone know what I read. sounds like it works too.

 

Humm I might be willing to give it a shot anyway.

 

I say go for it! "its only metal..."

 

Actually Jesel makes a kit like that for SBCs. IIRC, it's about $700.

CHP did a test on it and they said it's great. Of course I'm sure $$$ had some say in that test.

I'll look in my past issues and see if I can find it. It may take me a day or two though.

AJ