the reason im asking is i just bought a set of lt4 roller rockers, and there good up to .575 lift, and i think that would be my lift, i think ill be fine because it says there good as long as you dont exceed .575 lift.
anyone else running this setup?

 

.544/.576 w/1.6 rockers

to calculate take the stated lift...divide by 1.5 then multiply by 1.6

 

Lift with 1.5 rockers, divide by 1.5, multiply by 1.6.

Example: .500 / 1.5 = .333 lobe lift, x 1.6 = .533

 

well put the rockers on everything seems good, anyone else useing lt4 rockers?

 

you say don't exceed .575...the 306 is .576 w/1.6 rockers...I realize it is only .001...but I don't like being that close to the limits.

 

agreed

 

yeah the summit tech line says it will be fine as long as the clearance is good, there should be at least .020 between the base of the nut and the body of the rocker at max lift and i have .030,

 

Would just like to mention that over the years I have read where some guys shy away from those rockers, once their in the size cam range that you are using. Could be internet BS, then again, maybe not. Take it for what it's worth.

 

I have Crane aluminum rockers on my race motor: ~0.700" lift and 7,500rpm with some fairly heavy valves and stiff srpings.

Rich

 

I bet those aren't self aligns, at hi lift the self aligns slide off the side

 

Originally Posted by Z-RATED94
Would just like to mention that over the years I have read where some guys shy away from those rockers, once their in the size cam range that you are using. Could be internet BS, then again, maybe not. Take it for what it's worth.


yeah i wouldnt go any bigger than what i have with them but im not going to be changeing my setup, and the clearance is there so i dont see the problem,

 

Right, I didn't realize he was referring to SA, just the Crane rockers in general.

Rich

 

yeah i have spun the motor to 7k with no problems with my old proform rockers,

 

they where SA,

 

I don't think you quite understand, do you see how the rocker aligns? at the higher lift do you see how it has less side to side support? Take alook at everything and try to understand it....

I'm not trying to tell you anything bad but I have had one fly off at 6k plus and I was lucky

this is all I had