hey guys i have world product s/r torquer 305 heads and i was using self aligning stock ratio rockers and pushrods, i installed 1.6 ratio roller tip rockers that arent self aligning, the hads have the small hole for the pushrod, well after a short time i looked under the covers and a couple of the push rods are wearing through the hole in the head and the rocker is starting to come off the valve stem, what the hell is going on here?

 

read what you just typed you answered your own question, you mixed parts

 

no i didnt, the heads have the small hole to guide the pushrod, but it also had stock self aligning rockers and no wear.

i put non self aligning rockers on it and it is wearing the pushrod guide holes out.

now when i did a search everyone states that you can use non self aligning rockers with the small pushrod holes.

am i missing something here?

 

you need to use self aligning rockers

you can't mix parts that aren't ment to be mixed.

please tell me you are atleast using guideplates

 

no i'm not using guide plates, i guess theres some bad information here...

There are 3 systems available to locate the rockers on the valves. One, and only one, must be in effect at any one time.

narrow slots in the heads that fit tight to the push rods, no guide plates, and non-SA rockers;
big holes in the heads for the push rods, guide plates, and non-SA rockers; or
big holes in the heads, no guide plates, and SA rockers.
SA rockers were introduced on the SBC in 87. Before that, from 55 to 86, nearly all SBCs had method #1. For racing, method #2 is more stable, since the guide point is moved much closer to the end of the push rod, therefore the push rod can't bend and allow the rocker to move around to somewhere it's not supposed to.

Look at the heads. If they have little slotsfor the push rods that only clear the rods by .015" or less, then you must not use self-aligning rockers. If you have the big holes, but your heads have guide plates, then you must not use SA rockers either. If your heads have big holes but no guide plates, then you must use SA rockers.

The year of the block does not matter. Whether it has the factory roller setup (or the original, correct, roller design either) does not matter. The year of the heads does matter, because they changed to SA rockers in 87; they quit using the narrow slot and went to the big holes.

 

Sorry, to jack this thread, but what does a 1.6 roller rocker do compared to a stock rocker on a 305 TBI?

 

gives the valve more lift.

 

heres a pic

 

For starters, you were doing what you shouldn't.....self aligning rockers with heads that have the slots for the pushrods. Are you sure the SA rockers didn't cause a couple of the pushrods to enlarge the hole as in your pic?

 

i'm positive, now i'm just looking for a fix

 

Either drill out all the guide slots and put guide plates on them, or try plan B.

Get guide plates, and modify them to use them only on the slots that are messed up. I would cut the guide part off for the other pushrod so it only guides the f*p up one. This would also required hardened pushrods, just get an entire set and replace them all. The right way would be at the least pulling the intake and drilling out all the guide slot holes and hopefully being careful to not get any metal in the engine (pulling the heads would be better but thats a lot of work) and then putting guide plates on them all.

 

i was reading a comp cams instruction or crane cams, one or the other

i'm going to pull the intake, drill out all guide holes a 1/2" and buy some comp cams magnum 1.6 ratio self align rockers,

sound good?

 

That should solve your problems. Just be careful when drilling to not get any shavings in the engine.

 

by giving it more lift... what does that do? assuming more lift means it pushes the valve open more. it flows in more air/fuel... and flows out more exhaust?

 

Exactly. A .450" lift cam with 1.5 rockers becomes a .480" lift cam with 1.6 rockers. As long as it doesn't exceed the flow limits of the heads or the coil bind limit of the valve springs, more air in = more power.