trying to get pushrod lengths!!!!

I bought a length checker and for exaust if I start with the roller tip in center of valve tip, Im at 9.060 but when i roll engine to max lift the roller is right to the outer edge of stem. And then when I try to get my intake length, I have to be down at about 8.40 to get roller to center of stem but at that point the rocker is hitting retainer!! What is going on here? oh and when I roll intake to max lift that also runs out to ende of tip. I have Milodon roller arms. I got the motor with stock iron heads and these rockers were on that but dont know if they were right either. As fasr as I know this block has not been decked and its .030 over with a new set of scj heads that Im trying to finish install and these rockers and pushrods are throwing me for a loop. What do I need here? Please help and ask questions if needed.

Are you sure you have 1.73 rockers and not 1.70 chevy rockers could be some of the problem but not real sure if the 1.70 will do what you are talking about.Are you running a solid lift cam if so make you have the rocker are set right on the gap.I had a time figuring out the right length on mine.Finding the right length can drive you crazy sometimes or it does for me.

69F100 wrote:Are you sure you have 1.73 rockers and not 1.70 chevy rockers could be some of the problem but not real sure if the 1.70 will do what you are talking about.Are you running a solid lift cam if so make you have the rocker are set right on the gap.I had a time figuring out the right length on mine.Finding the right length can drive you crazy sometimes or it does for me.

yes, they are stamp with 1.73 right on them.

What length are the rocker studs?

longroofracer wrote:What length are the rocker studs?

not sure, I believe they are a standard stud as opposed to the longer for girdles. Plenty of thread for rocker nut.

On the ex try shortening it to 9.02 and try 8.45 see if that help are your head out of the box or have they had work on them.This is my 1st solid lift cam I have run.When I was work on mine finding the rifgt length i went .03 at the time it took me about 2 hours to finaly figure mine out.

it is also a solid lift cam with .026 lash

69F100 wrote:On the ex try shortening it to 9.02 and try 8.45 see if that help are your head out of the box or have they had work on them.This is my 1st solid lift cam I have run.When I was work on mine finding the rifgt length i went .03 at the time it took me about 2 hours to finaly figure mine out.

heads are out of the box with just some port clean up and match to gaskets. I will try those lengths and see. Thanks

actually I cant go any shorter on intake cause these rocker arm are hitting the retainer stopping them from dropping anymore. Thats why Im thinking I might need a different set of arms.

stanggt wrote:

longroofracer wrote:What length are the rocker studs?

not sure, I believe they are a standard stud as opposed to the longer for girdles. Plenty of thread for rocker nut.

Measure them from the flat of the base of the threads, where it bolts to the head, to the top.

longroofracer wrote:

stanggt wrote:

longroofracer wrote:What length are the rocker studs?

not sure, I believe they are a standard stud as opposed to the longer for girdles. Plenty of thread for rocker nut.

Measure them from the flat of the base of the threads, where it bolts to the head, to the top.

They are 1 3/4 inches

Sounds like you might have wrong length studs

That was why I was asking. 1.75" are Chevy deals, try some 1.9" or 2.0" deals and I bet things will look better for you.

longroofracer wrote:That was why I was asking. 1.75" are Chevy deals, try some 1.9" or 2.0" deals and I bet things will look better for you.

I dont understand why longer ones are needed, please explain so I can understand. Is it so I can use longer pushrods, getting the rocker, Pushrod side, higher?

it would also help to know what brand of rocker arms you are using.

dfree383 wrote:it would also help to know what brand of rocker arms you are using.

milodon 1.73. I think I found my problem, Valve stem on intake valve is .135 above locks and the exaust is .230 above locks. That is why I am having problems with intake and not exaust cause stem is higher allowing me to adjust letting the roller come back farther on the stem. Looks like I need lash caps for intake valves or the valves should have been .100 longer

What heads and what length valves? Iron or Aluminum? What part number?

dfree383 wrote:What heads and what length valves? Iron or Aluminum? What part number?

6049 scj heads aluminum , I dont know the length of valves, they are Manley. I think Im starting to figure this out. I was told earlier to use a taller rocker stud and I assume its to get the rocker higher to take some of the sweep away so roller doesnt travel all the way across the valve?

stanggt wrote:

dfree383 wrote:What heads and what length valves? Iron or Aluminum? What part number?

6049 scj heads aluminum , I dont know the length of valves, they are Manley. I think Im starting to figure this out. I was told earlier to use a taller rocker stud and I assume its to get the rocker higher to take some of the sweep away so roller doesnt travel all the way across the valve?

If they are manley they should have a part number in the tip / stem .

dfree383 wrote:

stanggt wrote:

dfree383 wrote:What heads and what length valves? Iron or Aluminum? What part number?

6049 scj heads aluminum , I dont know the length of valves, they are Manley. I think Im starting to figure this out. I was told earlier to use a taller rocker stud and I assume its to get the rocker higher to take some of the sweep away so roller doesnt travel all the way across the valve?

If they are manley they should have a part number in the tip / stem .

All I can make out is the word manley. Im gunna get the longer studs just need to find a part# for them