I need to know what the max lift is for 4.8 valve springs.

 

Valve lifts in the 4.8L are .480", so I'm assuming max lift is around .550"

 

From what I've been told, the stock springs aren't good for more than the stock cam basically, right around .500 lift max...

If you're putting an upgraded cam in any GENIII engine, springs are a must...which springs depends on the lift and aggressiveness of the cam lobes. A mild cam with lazy lobes can survive fine with inexpensive (less than $70 I believe) LS6 springs...

 

No, slap yourself.

Lunati's dual kit is made by PAC. Not only does Lunati work directly with PAC and they openly admit this, one of the sales reps said the LS duals are made at a "facility" in MI. Ironically PACs facility is in MI.

 

Stock? I think that it's a little under .500, they're basically only good for the stock cam, if you're planning any sort of aftermarket cam swap you're going to need some sort of adequate springs

 

Patriot Golds

 

Comp.921

 

PAC 1521's!!!!!

 

Any update on the Comp 26918's? Are they still having problems or did they get it fixed? I am also looking for either the 26918's or 1518's. Any of our friends to the right stock either of them?

 

seen a guy on ls1truck broke one just the other day...