How do I know if my valves will be smashed?

[The Fox]

I'm getting some afr 165s with the upgraded springs. I've got 1.7rrs and a cam with 544 intake lift. I'm not hitting the valves now so will I be alright after the heads? My engine is an 87 and my cars an 88. What should I do? Thanks

Anthony

 

[Stang8URMPRT]

Duration has more to do with p/v clearance then lift does. Max lift happens when the pistons way down in the cylinder, so it doesn't matter what the max lift is. AFR recommends staying under 230 degrees duration @ .050. I ran a XE274E Comp (over 230 degrees, don't remember the exact numbers), and it didn't hit. Would have been best to check with clay before you bolted everything up. Good luck!

 

[MarSaleenMustan]

check with clay, that way you dont mess up your valvetrain/pistons. cheap insurance and save your self headaches, money. good luck

 

[The Fox]

Thanks guys, but how exactly do I use clay and how exactly should I perform the clean up process???

Anthony

 

[OneBad93Z]

My cam is .512/.531 with 228/232 @ .050 and no issues on the AFR's