I planned on getting a set of the Comp Cams Gold Race Roller Rockers but was not sure on what size the stock 95Z28 rockers were? Also, i didnt know about the right size to get 1.5 or 1.6? Non self-aligning or self aligning, whats the difference and does one make more power than the other? I think i would need new springs too? Whats the best spring out there?

Thanks

 

Stock 1.5. The non-selfs are supposed to be quieter, but you need quide plates and hardened plush rods (don't know if you have them or not).

I have no problems with my self aligned on my 97.

As far as springs, if you plan on a cam in the future, I'd get springs that will match the Cam Card specs (if you know which cam).

The seats will only accept a certain size dia.so you need to check the seat dia. If you get dual springs you might have to get the heads machined to accept the larger dia.

There are lots of good springs out there. I've only heard once that K-Motions weren't that good. But I can't swear to that. I have REVs on my small cam.

Check with some head builders and see which springs they use. E.g., CNC, Lingenfelter, etc.JMHO

 

I don't think you'll realize any performance gain with the 1.5. Get 1.6 SA and go with LT4 valve springs if you don't want to change the cam, or as said above if you plan to change the cam down the line get the proper valve springs for that cam.

 

The stock rockers use a 3/8" stud, are self aligning, and have a 1.5 ratio.

You can replace with any SBC rocker for a 3/8" stud. If you use self aligning, then you don't need guideplates. If you use the non self-aligning, you have to use guideplates and hardened pushrods. Don't use guideplates and self-aligning rockers together. Some of the earlier cars came stock with hardened pushrods. The non-self aligning setup with guideplates is said to be more stable at higher lifts and higher RPM.

If you go with 1.6 ratio rockers, you WILL need new springs. The stock springs will be close to binding (i.e. the coils stack one atop the other and won't open any more). When that happens, things tend to break. There are literally hundreds of different springs out there. Talk to someone experienced to decide on the right ones. If you are planning to do a cam swap, it won't hurt to put bigger springs on now.

 

So the 1.6 rockers it is! When people say the non self-aligning are not as quiet, do they mean it is an annoying noise or more like a noise that says "Look Out"? Thanks. I was also thinking about a cam down the line, however, i still want the car to get somewhat decent gas mileage, while at the same time pushing some serious horsepower. Thanks again

 

NSA rockers along with guideplates help to minimize valve float...whereas the SA rockers have a greater chance of causing valve float...

3/8 stud is stock. It's better to step up to a 7/16 stud over the 3/8...

 

use 7/16 non self aligning rocker arms.....