max lift with 440 rocker arms?

[440B5CHALLENGER]

i’m doing a mild build to a motor home 440, what’s the max lift I can use with the stock rocker arms? Thanks

 

[Chryco Psycho]

It should be Ok into the ..525 lift range but there are a lot of factors , cam lobe ramp speed , spring pressure needed ,
Lunati makes a number of Voodoo grinds in the .480+ range with good street manors

 

[dadeo1852]

.506/.524 on mine with no issues for years now.
Andy

 

[440B5CHALLENGER]

Thanks for the replies.

 

[Darter6]

Same here I ran the Purple Shaft .509 with stock rockers.

 

[Xcudame]

Really unless you just have to have the exact 1.5 rocker arm ratio (stamped rockers are ~1.45), the factory stamped rockers are hard to beat for lifts under . 525" like the great minds have posted. They retain oil in the bottom of each rocker after shut down, so each time you fire your engine, the valve train is pre-lubed! Ingenious those Chrysler engineers!

 

[Darter6]

Check them for wear. I have seen them start to egg shape after awhile.

 

[Cratos]

how do you check for wear on the rockers and shafts? (on a 50 year old motor)
I see Mancie make new arms and shafts. just running a sixpack cam nothing big. not sure of the wear in the arms and shafts.

 

[Chryco Psycho]

Where the rocker rides on the shaft generally you only see wear on the shaft , the tip of the rocker can have ridges from the valve tip riding in one spot .
If you go to a higher lift cam with used rockers you can get a clicking as the ridge rides onto the valve tip .

 

[moparleo]

Don't forget it depends on what type spring you run and the valve guide height.