[80ta]

Checked the cam ( comp xe268h) on my 454 while doing the bottom end, and found some more than expected wear. Will be replacing it with a lunati 60203. About the same duration but more lift. Was hoping to use the old springs which are comp 911-16. How much lift can these springs handle.

They are a single spring, anything that will help the cam breakin.

Comp @50:
intake lift/dur .515, 224
exhuast lift/dur .520, 230

Lunati @50
intake lift/dur .542,227
exhaust lift,dur .554,233

thanks

[DoubleVision]

Just to be on the safe side you are using oil with ZDDP in it I hope?

[68NovaSS]

On those springs the installed height is 1.9", open height is 1.4" and coil bind is 1.2". Get your rocker ratio and do the math or get the info you need from Lunati. BTW, the spring rate is 373#'s and open pressure is 309, pretty stiff to be considered "break-in" springs. A good move with double springs is to remove the inner spring for break-in. Lunati has their own requirements for warranty, check it out.

[80ta]

I always use oil additives for the cam. Sounds like I need to use a different spring for breakin.

Thanks

[6426yy]

Use some OLD stock springs.

[cobalt327]

Originally Posted by 80ta

anything that will help the cam breakin.

Comp @50:
intake lift/dur .515, 224
exhuast lift/dur .520, 230

Lunati @50
intake lift/dur .542,227
exhaust lift,dur .554,233

thanks

More on cam break in here.