Roller Rocker Clearance Issues!!!!

ChromdOutDubs

Member

Sep 1, 2005

268

1

18

Tavares, Florida

Aug 21, 2007

#1

• Aug 21, 2007

• #1

Well i was testing my starter the other day and made a video of it, as i was watchin the video, i noticed that my rocker studs were bending when the cam reached full lift (.620 in/ex). I went back out and checked it out. This is what i found!!!! Im machining the rockers right now so clearance them, bu ti was just wondering has anyone else ever seen this issue before? Thanks.




-AJ

 

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Black1987Stang

Active Member

Aug 22, 2004

1,422

0

37

Jersey Shore

Aug 21, 2007

#2

• Aug 21, 2007

• #2

All I gotta say is DAMN that's a big cam (assuming you mean at .050)

What preload are they adjusted at?
correct size pushrods right?
maybe you can get skinnier nut things? or just grind them down which I assume that's what you're doing?

Good thing you found it before something broke tho

 

cenok is family

15 Year Member

Jun 25, 2003

1,409

69

79

Norman, Ok

Aug 21, 2007

#3

• Aug 21, 2007

• #3

that's a pretty good amount of lift man! got any vids of the car? i've never seen anyone with a clearance issue like that, i can see how it could happen with that amount of lift though.

 

mred03gt

New Member

Dec 10, 2003

33

0

0

Aug 21, 2007

#4

• Aug 21, 2007

• #4

I had that problem with my cam +600 lift and comp cam pro magnum rollers. Be happy you found out before you ran it. I did not check mine and busted about four of them what a mess. I don't know if you can clearance aluminum rockers. I went with crane gold and checked them before I ran it and they were fine.

 

thumper460

Founding Member

Jul 24, 2000

3,022

2

56

Orange Park , Fl

Aug 21, 2007

#5

• Aug 21, 2007

• #5

ALL rocker arems are not Equal!! clearance them is the only way!! dont feel bad, there is a lot of stuff out there that needs a grinder touch everyonce in a while!! I run Harland sharps 730" intake and 750 exhaust. No issues on my BBF. On a small block we were running 630/650 again with Harland Sharps.. no Issues!! Cool??

Just me...............................

Thumper

 

ChromdOutDubs

Member

Sep 1, 2005

268

1

18

Tavares, Florida

Aug 21, 2007

#6

• Aug 21, 2007

• #6

Black1987Stang said:

All I gotta say is DAMN that's a big cam (assuming you mean at .050)

What preload are they adjusted at?
correct size pushrods right?
maybe you can get skinnier nut things? or just grind them down which I assume that's what you're doing?

Good thing you found it before something broke tho

Click to expand...

I just clearanced the rockers .075" today. I'm going to assemble some of the rockers and install them and see how they do. If that wasn't enough i will take the poly locks and put them on a lathe and turn them down some till i get it where i want them.

-AJ

 

ChromdOutDubs

Member

Sep 1, 2005

268

1

18

Tavares, Florida

Aug 21, 2007

#7

• Aug 21, 2007

• #7

Check out the Jig we made up at work today to machine all the rockers down. I think this did the job hopefully. All i got to do now is assemble them all, then install them, then drop the new radiator in and then.......................... I should be able to CRANK HER UP!!!

Actually i dropped one of the needle bearings when taking apart the rockers so i had my boss order me a few extra bearings to replace some of the ones that fell. So thats all im waiting on.

Here are the pics.





View attachment 368404

-AJ

 

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