Uh, I got a set of used sportsman II's lately. I was told that they have springs on them that are good to 600 lift. They are double springs. Anyway, I got to looking at them and the shims that are under the springs look really thick. How thick are these supposed to be and do you think this would pose a problem or think that there was a problem that they were trying to get around? I was thinking about it and I wonder if the springs were made to have real tall retainers like the exhaust rotators and they were making up for it with shims? Does this sound feasable? I guess I will have to check and see if they are that thick on both exhaust and intake or just exhaust. What do you guys think? Should I be worried?

Ben

 

if you don't know what springsyou have replace them or have them checked. running used springs is pretty foolish when looking at the bigger picture, sort of pay me now or pay me later. all the shims do is reduce the length of the spring making it meet the instaleld height spec.

 

Ok, so the thick springs arent probably a problem then. If I get replacement springs, am I going to have to measure and use different shims because I have never done that before. I dont have any way to measure the spring pressure, but could probably borrow the stuff to measure installed height and such.


Thanks

Ben

 

frm a expense and time stand point checking springs to see if they're still good isn't a smart move since you'll find some out of spec and if ones bad the other 15 will soon follow. unless you have soem really high dollar springs i'd just replace them. yes just measure the distance from the spring seat i nthe head to the part of the retainer where the spring seats, that is your instaleld height, add shims as required to make the spec.

 

And there is a really good chance that the S-iis aren't going to have 1¼" spring seats. I'll bet they're more like 1.440" or larger.

 

Ok. I figured that they will be pretty good size seats but dont have much experience with what each size looks like. The only set of springs I have replaced before were the ones in my 416 heads when i got the cam. I dont quite understand your point though. I know that it is easier to get larger diameter springs that have more pressure but are they more or less expensive?

I dont know to much about the springs. I was told that they are good to 600 lift. They are dual springs. I am using the comp cams xe 268 so even after I get a set of 1.6 rockers I will still only have slightly over .500 lift.(.501 and .510 if I remember correctly). What springs would you suggest?

Thanks for the help.

 

Sportsman IIs have dual spring pockets. A smaller 1.25 that is recessed every so slightly into the larger ~1.55" outer pocket. I don't recall every seeing another head done with pockets quite like it.

 

Can someone reccomend a spring to match these heads and my cam?

 

anyone?

 

What diameter are your heads' spring pockets cut to?

What length valves are you running in them?

What is the outer diameter of the valve guides?

Since they're used heads, any of these numbers could be anything, although most likely, they're 1.45" or 1.56", 5.011", and .530" respectively (none of those is the same as a stock motor). You'll have to measure them.

 

This is what Damon said that they were earlier in the post. I will measure before I buy, but have to borrow the tools so until then I wont know anything other than that.

Ben