with the heads on ???? only want to know if there is a hope for not taking apart.
I mesure for the new cam before it arrives and got .600 lift + leaving the .060 safety factor =.660 and right there it touch the oil seal :mad: ,any hope ..... :confused:

Yes,

You can install valve locks that will raise the retainer usually .050". I know Comp Cams sells them...about $35. just have to make sure your spring pressure is still in the acceptable range.

it also depends on the cam is it solid or hydraulic? if it is solid cam then the .600 lift is only acheived by zero lash.........you subtract the lash of the advertise lift to get net lift.

Tom ,I verify the .050 + retainers at Competition Products they got a few comp cam .050 + = for $23.95 set and vto .030 + for $14.95 set ,but how they fit ,do they put the retainers more close to the top of the valve ,and how about the roller ,This is got to be mesured to be sure if the retainer stay low and do not hit the roller ? may be a little grind on the roller will work if this is the case . let me take one problem at a time ,I would like to have everything clear went the cam arrives ,sorry for all the ?????? :confused:
Dennis it is a solid cam 402A3LUN .585/.600 LIFT

Yes, they move the retainer closer to the valve tip. You'll have to check rocker to retainer clearance once you've done that. I installed isky +.060" retainers on my valves and have no clearance issues...

Then you can add a shims/locators/cups to get your installed height where you want it.

CASEY ,IT IS NESESARY to change the retainer too or just the locks like Tom said

Yes,

as Casey said. I used them a few years ago, checked the roller tip contact points on the valve stems about 4 times to be sure they stayed on the center of the stem.

I didn't have to change retainers. I don't see where you would have to in a typical application

As long as they're the same pitch as your existing retainers (either 7°, or 10°, usually) you don't have to change anything.

The only thing you have to be careful of is clearance between the outer edge of the retainer and the area of the rockers near the pivot. Moving the retainer up on the valve stem may allow it to hit the rockers. If so, get .050" longer push rods. If you have a big enough cam that the retainer-to-guide clearance is an issue, you probably need longer push rods anyway.

Add .050" of shim under each valve spring to put the spring installed height back where it was.

OK ,i understand that but ,but this locks give me more installed height and I can fix that with shims ,but the as the retainer comes up the locks do to OR THEY stay pass down the retainers and will still give me the same mesure between the locks retainers and valve guide .I call at summit to order them fast and the said this is a good thing to do went you want more installed height ,or maybe they did not understand .
the cam will got a valve lash of .026 IN. AND .030 EX. ,IT is not even .050 what I need maybe .025 + valve lash to be safe .

Hss nothing to do with the lash.... the valve stem stays in the same place, just the retainer is moved up the stem .050" closer to the tip.

THAT WAS what I was worry about .
since it eems I GOT TO TAKE THE HEADS OFF
I got another topic almost related about AN rectangular port heads that a friend want to trade ,please look for the post OVALS TO RECT PORT ,THANKS graemlins/thumbsup.gif

Originally posted by rcatala:
with the heads on ???? only want to know if there is a hope for not taking apart.
I mesure for the new cam before it arrives and got .600 lift + leaving the .060 safety factor =.660 and right there it touch the oil seal :mad: ,any hope ..... :confused: you have enough clearence rest assured........your cam is an advertised .600 lift subtract the lash say even tight .020" you only have a .580 lift max.......so now you have .080" clearence more then enough.............

why are you stressing over something like this...............????????????