427 SBF

[89 Fox 427]

Also I'd like to thank AI for making me want to spend money on some new wheels from 3030 autosport

 

[Mister3]

How much clearance should you have between rocker arm and pushrod at full lift?

Any suggestions? Mine were awfully close

0.00000"

 

[89 Fox 427]

You may have misunderstood the question

 

[Mister3]

You may have misunderstood the question

At full lift the pushrod is jambed into the rocker to actuate the valve, where and why would there be clearance?

 

[Patriot Racer]

At full lift the pushrod is jambed into the rocker to actuate the valve, where and why would there be clearance?

I think he’s talking about the rocker body and the retainer. I’m starting to speak 89. Or maybe I’m way off.

 

[drag-200stang]

I am going to say .040'' if it does not seem to weaken the rocker to much.
I think he means, what he said, rocker to pushrod.

 

[89 Fox 427]

I am going to say .040'' if it does not seem to weaken the rocker to much.
I think he means, what he said, rocker to pushrod.

Thanks. That seems like enough for deflection and such

 

[89 Fox 427]

I think he’s talking about the rocker body and the retainer. I’m starting to speak 89. Or maybe I’m way off.

Not retainer. The body of the rocker at full lift gets pretty close to the pushrod.

I don't know what kind of magic dust or ramp rate I would need for the rocker to pole vault off the pushrod at full lift

 

[Patriot Racer]

I am going to say .040'' if it does not seem to weaken the rocker to much.
I think he means, what he said, rocker to pushrod.

If you go to zero lash and another 1/2 turn how would there ever be clearance?

 

[Patriot Racer]

Not retainer. The body of the rocker at full lift gets pretty close to the pushrod.

I don't know what kind of magic dust or ramp rate I would need for the rocker to pole vault off the pushrod at full lift

Oh, now I get it, the backside of the rocker body. Is this more of your paranoia? It would have to be damn near vertical. If it ain’t touching I wouldn’t worry about it.

A picture could have saved us 10 posts.

 

[89 Fox 427]

Oh, now I get it, the backside of the rocker body. Is this more of your paranoia? It would have to be damn near vertical. If it ain’t touching I wouldn’t worry about it.

A picture could have saved us 10 posts.

I should have snapped a pic. The scorpion rockers have a fat ass behind the stud and the cup isn't as far away as you'd think.

As I said a while back the whole geometry of a sbf seems weird between the block and heads.

 

[Steve439]

GM fixed all that with the LS

 

[ratssass]

GM fixed all that with the LS

wut??

 

[KwiknFast]

89 Fox is close to going off his rocker. That's wut.

 

[Mister3]

GM fixed all that with the LS

The good ol LS, designed by the joos

 

[ratssass]

ouch....that's gonna leave a mark!

 

[Mister3]

.... when the GM joos copied the SBF and made it better

Fixt for accuracy

 

[Steve439]

The good ol LS, designed by the joos

If you're talking about what I posted, I was just havin' fun...

 

[Mister3]

If you're talking about what I posted, I was just havin' fun...

The LS is God's chosen engine

 

[Steve439]

"For you are an engine holy to the Lord your God. The Lord your God has chosen you out of all the engines on the face of the earth to be his engine, his treasured possession,"