lsx rockers on vortecs?

6

68steiny

Member
Wondering if anyone knows anything about this? I saw a previous post on here were someone had a picture of a possible running setup....











Everything "appeared" to bolt up fine, but there was left to right play on the LSx rocker. I don't know if that is normal.

Seems like a cheap way to gain some lift.
 
T

TurboSBC

New member
Re: lsx rockers on vortecs?

Those look like my stock Vortec rockers :dunno:



472417_10151457721519389_1764606404_o.jpg
 
6

68steiny

Member
Re: lsx rockers on vortecs?

Cool, I have some of those also. The 4.3 vortec cam seems like it would be a good fit for this setup with the 1.7 lifters and the wide LSA.

I'd like to figure this out, anyone to talk to on this subject?

Thanks
 
Priceless

Priceless

New member
Re: lsx rockers on vortecs?

This is actually quite interesting. I have a bunch of those Lifters laying around from my last build. One thing to remember about them is the trunion is considered the weak point and most change them out with the comp trunion lit.

Heres a list of camshafts:

http://www.syty.net/forums/showthread.php?t=15850

And here is a math equation i found:

Easy math can be used to find out

Rated liff / 1.5 = lobe lift x new rocker ratio = gross lift

Most all sbc cams are listed with 1.5 ratio rockers

So say if your cam says .470" lift / 1.5 = .313 lobe lift x 1.6 = .501"

Duration will not be changed with the rockers!!
 
TrendSetter

TrendSetter

Organ donor in training
Re: lsx rockers on vortecs?

the advertised duration does not change but the 050 will and the valve will be opened more aggressively with the higher ratio rocker. more area under the curve which is a good thing. just make sure your valvesprings are up to the task.

the pictures make it look like it will work. what you can do is color the valve tip with a black sharpie, then install the rocker and turn the motor over a couple times to see where the contact is. you want it narrow and right in the middle. if its off a pushrod length adjustment may get it right. it looks a little on the outside from the pictures.
the other area i would check very closely is the pushrod where it passes through the head, it should be closer to the fulcrum of the rocker which could cause it to crash into the head.
 
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