how do you sleeve pshrod holes?

[abdywgn]

what tubing size do you use? what reamer size? I'm interested in doing a pair of 587's if for no other reason to say I did...and hopefully it works. Thanks! Bob

 

[valiant1966]

I'm curious. Why would one sleeve a pushrod hole? Most people are opening them up for 1:6 rockers and stuff. Has it been opened up to a point that it breaks thru into the runner area? Or maybe porting? Curious minds need to know. Thanks.

 

[abdywgn]

porting

 

[airwoofer]

My alum eddy heads have sleeves put in where the porter got into the runners. No big deal. I have seen copper and alum tubing used.

 

[IQ52]

Sleeving the pushrod holes in the 587 head will yield no significant change until the most extreme upper lifts and flows. By this I mean, until you are in the 280-300 cfm range and .600"-.700" lifts in those heads, you will reap no benefit. Then you might see 4-5 cfm gain if you are fortunate.

The pushrod pinch area of the 587 head, without sleeving it, is capable of 292 & 298 cfm at .600" & .700" lift.

A-n-y-w-a-y. You can use a 9/16" X .014" wall brass tubing, ream the pushrod hole to 9/16", coat the tube with Loctite Sleeve Retainer and press the tubing into the reamed hole.

 

[abdywgn]

Thank-you IQ52! both for the sizes and the flow numbers. time appears to be better spent elsewhere at this point. Thanks again! Bob