What's the difference?

I'm looking at 1.7 non self aligning rockers. What's the difference between these and self aligning ones?

I mean besides not having to use guide plates.

 

In my opinion if the cam selected is a low lift cam meaning gross lift (below .580) and the car is not going to be taken tp high rpms them self aligning are the way to go. Non self aligning in my opinion stablize the valve train better. But in differences the rocker tips are designed different

 

It's not just guideplates, you'll need hardened pushrods too.

Self-aligning versions are easier to bolt on, since no other changes need to be made. Non-aligning versions are typically quieter, more stable, and are usually recommended on engines with over 0.550" valve lift or high-rpm operation.

 

I will have .595 lift actually.

 

NSA, like it says, don't control any alignment of the rocker arm. It is done by pushrod guideplates. Rocker arm centering is therefore done before any motion ever gets to the rocker arm. Noted to be very stable, because any motion is controlled at the point of origin.

SA- alignment is controlled by small tabs on the valve contact end of the rocker arm that keep the rocker centered on the top of the valve stem. Rocker arm centering is done at the last possible place it could be-at the valve stem.

 

Thanx I knew that part.

I was just wondering what the advantages were to going with non-self aligning basically. I guess I'm wondering which would be better with my setup.

XE230/236 cam with 1.7 rockers = .595 lift.

 

I think NSA may be a bit stronger.

 

The more the lift, the more stability you need. Being that the NSA's are more stable, the answer should be fairly obvious.

 

Thanx guys.

So I guess the next question is: What is the part # for the guideplates that I would need.

 

GM guideplate p/n 14011051. You will need 8.

 

Thank you sir!