Yeah, keep going and it should get better. As you get the rocker higher it will push down more vertically instead of laterally.

 

with a longer pushrod you mean. It needs to be ever further toward the exhaust side that that?.. I will try, but it does not seem to be gettin smaller as it moved towards the exhaust.. I mean I dont want it to far off center do i?

 

Yes with a longer pushrod. In the first pictures see how narrow your sweep was with a stock length PR (7.20). Then you decreased it A LOT and see how wide the sweep got. You want something narrow like the first pictures just on the exhaust side of the valve centerline. That's why I said in my first post you are probably about .050 - .100 too long because your pattern looked good to me it was just too far on the exhaust side. Try 7.10 to 7.15, no reason to shorten your PR by a lot unless your block is zero decked and your heads were milled a lot.

 

7.100"

 

I tried again with stock 7.2 and its really not that bad.. It is the narrowist weeep I can get, but its prety offcenter.. Think this is to offcenter? (its the same thing is each picture, but one had a glare.

 

Where does the rocker rest on the valve tip? I've never seen the black line in the middle of the sweep before. What did you do differently between the first go around with the stock length pushrods and the last time around?

 

here is settin it on, tightning the lock down and rotating the roller tip to make a good line. here is where it sits with stock pushrods.

I think the line is there because I rotated the tip before I rotated the engine over.




the red is BLOOD, I covered the flash with my finger. lol\

but other than the line in the middle. hows the sweep look?..

 

Just keep the sweep narrow and relatively centered. Thats as good as you're probably going to get from a comp rocker, they are not designed correctly for the type of geometry you are trying to achieve without doing something radical. You will do just fine and not wear anything out or hurt it, and its not your fault thats just how its designed/made.

 

To me the sweep still looks wide and it gets close to the exhaust side of the valve tip, but sitting on the valve it looks pretty much perfect. Based on the pictures I would go with the 7.1. Hopefully some other people will chime in with their opinion. Have you searched for the thread about determining pushrod length? Also I think Speed_demon had a thread when he was going through some of his issues with pics.

 

yea. I read threw a 5 page thread about it from almost a year ago. took me a long time, but it was great info there..

I used this thread

https://www.camaroz28.com/forums/sho...pushrod+legnth

but the pictures didnt work.. grr

 

IMHO that looks pretty good. Without spending money that is probably the best you are going to do.

Just for general information Crane makes rocker arms that are set back .050" for just such situations where you want to get the geometry correct. Basically the more sweep you have the less lift you are going to have.

 

89TransAm, your talking about the pitcure in post #20 correct?.. cus the one in post number 21 is not a sweep, its just where it touches when on the base circle of the cam.

it thats the case, then im just going to use therm. I did spend money on the. they are CC chromoly (sp?), but I got them used for a prety good price. so yea. not having to spend more money would be great. I think i will be ok with 7.2

 

Here is where mine are riding with a 7.200 PR.


Closed




~Mid lift.. closest to the edge the roller goes




Max lift

 

I know the middle one looks REAL close to the edge, but it you find the actual contact point, it ain't that bad.

 

My mistake. I was looking at post 22 and reading it wrong. Sorry.