273 rockers on Edelbrock heads

[roachmech]

I installed a set of Mopar Performance adjuster screws (with the required mod fro the lock nut )

on my 273 rockers and mocked up on the heads .
You can see the rocker tip sliding off the valve stem at full lift (501") NOT OK

I installed a set of CCA-621-16 .080" lash caps fronm Summit and checked it again. Not perfect but I am gonna run it.

 

[mrhotrod]

Do you have a part number for the Mopar Performance adjuster screws and lock nuts?

 

[roachmech]

Mopar Performance 3/8” Rocker Arm Adjusters Set/16 New P5007444AB
ebay

 

[glockr]

What shaft hold-down blocks are those?

 

[Demonic]

Get a hold of B3 and some longer pushrods.

 

[Kendog 170]

 

[mopowers]

That's gotta be hard on guides. I'd correct the geometry with a kit from B3.

 

[4spdragtop]

 

[dogbreath]

Make sure those lash caps are resting on the valve stem and not the locks.

 

[Remow2112]

I installed a set of Mopar Performance adjuster screws (with the required mod fro the lock nut )

I know this is an old thread, but what length pushrods did you use?

 

[roachmech]

I know this is an old thread, but what length pushrods did you use?

I made custom length ones , you will have to also.
That and the lash caps are required to get the rocker geometry in range

 

[Remow2112]

I made custom length ones , you will have to also.
That and the lash caps are required to get the rocker geometry in range

Thx, I appreciate you responding!

 

[Newbomb Turk]

Thx, I appreciate you responding!

If you need lash caps, you aren’t correcting the geometry.

Before you buy pushrods, call Mike at B3 Racing 3Engines and talk to him.

I promise you he won’t tell you to use lash caps.

 

[roachmech]

They definitely did correct the geometry
A better way to go would be to machine down the rocker saddles or maybe buy better rockers.

 

[Newbomb Turk]

They definitely did correct the geometry
A better way to go would be to machine down the rocker saddles or maybe buy better rockers.

I’m not going to argue with you, but you did not correct the geometry.

To correct the geometry you need to move the shaft UP and AWAY from the valve. You didn’t do that. That is the only way to get it right. A lash cap doesn’t correct the geometry.

If you look at your picture above, you can see how close the rocker is to the retainer. The OD of your spring is most likely not 1.550 or bigger.

When you see that you know the geometry is off.

Did what you do work? Yes. Is your valve train happy. Absolutely not.

Like I always say, b3racingengines.com has four very good tech articles on this.

I wish we could download them here and make a sticky for them.

It would save a ton of grief.

BTW, just to nip it in the bud, using a beehive spring for more clearance doesn’t fix geometry either, because that comes up almost every time this situation occurs.

 

[TT5.9mag]

I’m not going to argue with you, but you did not correct the geometry.

To correct the geometry you need to move the shaft UP and AWAY from the valve. You didn’t do that. That is the only way to get it right. A lash cap doesn’t correct the geometry.

If you look at your picture above, you can see how close the rocker is to the retainer. The OD of your spring is most likely not 1.550 or bigger.

When you see that you know the geometry is off.

Did what you do work? Yes. Is your valve train happy. Absolutely not.

Like I always say, b3racingengines.com has four very good tech articles on this.

I wish we could download them here and make a sticky for them.

It would save a ton of grief.

BTW, just to nip it in the bud, using a beehive spring for more clearance doesn’t fix geometry either, because that comes up almost every time this situation occurs.

I keep saying the same things. I just had a guy in another thread have a revelation and is now in contact with Mike. All we can do is keep saying it. Here’s Mike’s tech pages.

B3 Racing Engines LLC - Mopar Rocker Arm Geometry Tech

 

[Newbomb Turk]

I keep saying the same things. I just had a guy in another thread have a revelation and is now in contact with Mike. All we can do is keep saying it. Here’s Mike’s tech pages.

B3 Racing Engines LLC - Mopar Rocker Arm Geometry Tech

It just gets old. And if you don’t kiss *** and sweet talk people you’re an asshole.

The OP already did his rockers.

I’m hoping to stop the other guy from making the same mistake.

You’re a prick if you do and a prick if you don’t.

 

[TT5.9mag]

I know. It was the exact same argument I made elsewhere but this time he went and read, and learned, and is correcting the geometry instead of grinding on rockers for clearance. That was rewarding.