[slowbird]

Originally Posted by Stan Weiss

Mean Green, Dave and Brian,
What do you have for over the nose valve spring pressure?

Stan

700lbs'ish on my .850 lift cam, 1050lbs on my bigger cam

I would run shaft rockers on everything, the stability of a shaft system can't be beat.

[Mean Green]

This is a long block on an engine stand.

The engine had dyno time only on it. I pulled it apart to install a nitrous cam, check the ring gap, and test the valve springs. I thought it was going to be real basic. But first I noticed the pushrods weren't hardened, and then when checking the pushrod length, I noticed all the intake valve stem tips are marked up.

So at this point, seems like a good idea to switch to shaft rockers instead of trying to get the valvetrain geometry straightened out with the stud rockers.

[Mean Green]

Originally Posted by Stan Weiss

Mean Green, Dave and Brian,
What do you have for over the nose valve spring pressure?

Stan

675, .750 lift cam

[Dragncar]

Originally Posted by Mean Green

This is a long block on an engine stand.

The engine had dyno time only on it. I pulled it apart to install a nitrous cam, check the ring gap, and test the valve springs. I thought it was going to be real basic. But first I noticed the pushrods weren't hardened, and then when checking the pushrod length, I noticed all the intake valve stem tips are marked up.

So at this point, seems like a good idea to switch to shaft rockers instead of trying to get the valvetrain geometry straightened out with the stud rockers.

You don't use lash caps ?

[Mean Green]

Originally Posted by Dragncar

You don't use lash caps ?

I didn't build the engine or have it built. I bought it with dyno time only on it.

[Probird]

I had to space my stand up also. No lash caps here.

[Probird]

Originally Posted by Mean Green

According to the T&D website you measure the center of the #1 and #3 intake valves and the center of the #1 and #3 intake pushrods, subtract, and then divide by 2. and then add .050 for pushrod clearance.

My pushrod centerline width is 3.750 inches. My intake valve centerline width is 2.850 inches. 3.750 - 2.850 = .900.

.900 divided by 2 = .450

.450 + .050 = .500

So .500 is my rocker offset? Does that sound right?

Looks like the math is right. As long as your measurements are good I’d say that’s it.

[Mark G]

Originally Posted by slowbird

700lbs'ish on my .850 lift cam, 1050lbs on my bigger cam

I would run shaft rockers on everything, the stability of a shaft system can't be beat.

Not worth much hp if any and not needed with lifts 750/800 stability of a shaft system is not really needed... It is the flavor of the day.

[slowbird]

Originally Posted by Mark G

Not worth much hp if any and not needed with lifts 750/800 stability of a shaft system is not really needed... It is the flavor of the day.

Everyone has their opinion

[Dragncar]

A member here broke 2 Crower stainless rockers and now is going to shafts. SS Crowers have to be tough to break.

[Mark G]

Originally Posted by slowbird

Everyone has their opinion

Yep ..

[PAUL K]

Hah....its the Internet so a lot can be learned. FWIW I would never run anything but shaft rockers on a Wenzler head...and I'd prefer shaft rockers on anything that has an offset rocker.

FWIW.... Our Baddest Pump Gas stock pushrod location E-heads on the Planet uses Crower pedestal mount rocker arms and has never had an issue.

[Mean Green]

Originally Posted by Probird

Looks like the math is right. As long as your measurements are good I’d say that’s it.

Thank you

[Dave Polichena]

Originally Posted by Stan Weiss

Mean Green, Dave and Brian,
What do you have for over the nose valve spring pressure?

Stan

I'm at 900 over the nose, springs are at 2.100. I don't remember the "stock" length but I believe mine is 6".

Since going to shafts, my valvetrain has been solid and clearances don't move too much.

[Mark G]

Originally Posted by PAUL K

Hah....its the Internet so a lot can be learned. FWIW I would never run anything but shaft rockers on a Wenzler head...and I'd prefer shaft rockers on anything that has an offset rocker.

FWIW.... Our Baddest Pump Gas stock pushrod location E-heads on the Planet uses Crower pedestal mount rocker arms and has never had an issue.

Baddest on the planet .. your funny.. ..

[PAUL K]

Originally Posted by PAUL K

FWIW.... Our Baddest Pump Gas stock pushrod location E-heads on the Planet uses Crower pedestal mount rocker arms and has never had an issue.

Originally Posted by Mark G

Baddest on the planet .. your funny.. ..

Yes that is correct. They have hurt a lot of feelings and cost folks a lot of money trying to chase them down.

They helped boost the economy!

[Mark G]

Originally Posted by PAUL K

Yes that is correct. They have hurt a lot of feelings and cost folks a lot of money trying to chase them down.

They helped boost the economy!

LOL ..you crack me Paul baddest on the planet.... Oh ok if you say so …Baddest in your neck of the woods.. not the planet..

[PAUL K]

Originally Posted by Mark G

LOL ..you crack me Paul baddest on the planet.... Oh ok if you say so …Baddest in your neck of the woods.. not the planet..

Can you tell me of some that have performed or dyno'd better?

If you can't find any you can leave the planet and search the Universe.

[Mark G]

Originally Posted by PAUL K

Can you tell me of some that have performed or dyno'd better?

. Your just assuming so not everyone shares..But if that gets you off ..great Get a box chicken and pat your self on the back. job well done.. I am done don't have time for such nonsense... Stay healthy..

[PAUL K]

Originally Posted by Mark G

. Your just assuming so not everyone shares..But if that gets you off ..great Get a box chicken and pat your self on the back. job well done.. I am done don't have time for such nonsense... Stay healthy..

Sorry if I hurt your feelings somehow. Yeah I'm planning on a trip to Brown's this weekend. If you hear of any good performing standard pushrod location pump gas E-heads please feel free to share. I'm well aware that not everyone posts up their performance on here but this story goes a lot deeper than this Website.