Alrighty i just bought a ms4 cam from a member on here it was brand new and i got to looking on the the cam box and the specs were. .651 intake. .608 exhaust on a 111.5 lsa it says right on the box ls1-ms4. i just dont understand why the specs are different than a normal ms4. And also will i still be able to run this cam in my car stock bottom end ls1 with stage 1 prc heads with patriot gold. 650 springs. Just very leary on the specs. Hopefully someone can help me.

 

It is not different. See when a cam is ground it doesn't come out exactly like advertised numbers. Usually up to 2% variance is acceptable.
As for ptv etc... MEASURE

 

I would use .660 or .675 Dual Springs.

 

Has anyone had any experience with this cam at this high of a lift on stock ls1 pistons and ls6 heads?

 

that setup has been used a million different time man. do a quick search and you should easily find your answer if someone doesnt chime in.

 

Yeah i know its a popular cam but i donr really hear or see anyone with this cam with a. .651lift. Thats my only concern about it

 

It's .002 more than advertised. Also, lift has very little to do with ptv clearance. Duration is what will get you.

Measure to be sure.

 

Well running LSK lifts on stock heads is pointless anyways and lifts @ .050 have nothing to do with PTV

 

i just ordered an ms4 from tsp on a 110 and it says the same .651 lift but i got .675 springs with it. all other numbers are correct. should be good to go then right?

 

Your springs our a little weak for that cam. If you had the patriot extreme's you would be good. But the gold's are only made for .650 lift.

 

so the prc's .675 from texas are too weak?

 

Sorry I meant the OP springs were too weak. If they are rated for .675 lift you will be okay.

 

sweet...ready to do my first cam swap and ported 799's. should get up and go

 

My MS4s cam card said 651 608 to.

 

Stop giving advice before you give somebody even less clueless then you are bad information. The lift a spring is rated to has absolutely zero to do with how weak or strong a spring is.

The TSP EHT .675 springs are extremely stout for a stock pocket spring, you won't have any issues as they are almost 500 pounds open at your lift.

 

 

My cam card was .651/.609, and I have ran both sets of springs mentioned in this thread, without any issues on stock pistons.

 

what push rods will you use ?if the push rod is heavy will it require more spring pressure ?

 

If you think I only look at springs by their max lift rating then you don't quite have me figured out dude. Not sure why you want to just call me clueless when you do not know anything about me. Now I have never put a tsp valve spring on my spring tester before so I do not know much about it. So lift numbers are all I have to go by. However, I was trying to tell the OP that his Pat Gold springs would be too weak for that cam because they are only 375 pounds at open load. But I guess I am clueless about that one too aren't I?

 

Let me quote your ignorant statement.