<VV> Roller tip rockers...I know it's been covered before

[M Stevens]

Thanks Seth for ALL the good info. I am leaning toward the Comp Cams 1431 roller tips. I will do the required rework, to have them usable on my Corvair. Thanks again.

-m


Sent from my putt putt phone...

<div>-------- Original message --------</div><div>From: Sethracer--- via VirtualVairs <virtualvairs at corvair.org> </div><div>Date:08/07/2014  8:33 PM  (GMT-08:00) </div><div>To: virtualvairs at corvair.org </div><div>Subject: Re: <VV> Roller tip rockers...I know it's been covered before </div><div>
</div>I sent this to Mike. I guess I should have included VV. 

There is plenty of debate on use of the ball-stud roller tip rockers from  
Comp Cams. The ones that are closest to the Corvair rocker in design are the 
1.6  non-rail Ford rockers, not Chevy 1.6 rockers. Non-rail means they need 
pushrod  guide plates, like the stock Corvair rockers do. In my opinion, 
there are three  mods needed to run these successfully on a Corvair. The 
Corvair valve train is  not oiled through the tip of the pushrod (except for some 
oil in the matching  depression in the rocker arm. The Corvair ball stud is 
oiled through the  small hole in the side of the pushrod. Since the rocker 
is mounted upside down -  from the V8 position - oil cannot drain down from 
the original hole in the  rocker to the ball stud. The Corvair squirts a 
little through a hole in the  flank of the rocker. The Ford rockers do not have 
this hole, it must be added.  Hard drilling! Carbide tip. Since the Corvair 
doesn't use the hole in the  rocker tip, it should be closed off. I TIG 
welded the hole shut, from the  top-side of the rocker. Finally, the rockers on 
the Corvair, with it's splayed  valve design, have to lean over to the side 
a bit to allow all three  items, pushrod tip, ball stud and roller tip to 
stay in alignment during  travel. The Ford rocker, like the small block 
Chevy, does not lean in  original use, so it has a narrow slot. The slot must be 
opened up on the side  (see the Corvair rocker for an example) to clear the 
rocker stud. Intakes  and exhaust lean in opposite directions, so if you 
grind only one  side to retain a little extra strength, the rockers become 
unique, a left  and a right. I mis-installed a pair on my motor and it sounded 
like a threshing  machine. (Ventura 2008) When I pulled them off, the rocker 
studs were  highly polished on that side. 

I am using the Harland Sharp rockers (via SC Performance) on my  current 
race motor. Why? Because I had them on the shelf. They are pretty, but  make 
valve adjustment a pain.

Remember, Mike, opinions are like belly buttons. Everybody has  one! 

-Seth Emerson




In a message dated 8/7/2014 10:14:09 A.M. Pacific Daylight Time,  
virtualvairs at corvair.org writes:

Hello  guys, I'm new here so.. Please be kind. I have been tossing the idea 
in my  head lately, of rocker arms. I have read posts here and there about 
Comp Cams  1450's(1.7)  Has anyone had any experience with 1.6 ratio Comp Cam
s  roller tips? I know they need some customization to have them work in a  
Corvair, and I'm willing to get it done. Just asking for  opinions.

Thanks,
Mike

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