Vicious95Z28

It is, it's .544 exhaust w/1.5 rocker and roughly .576 w/1.6

marshall93z

Why does it not say it in the specs on their page?

Airbornec507

^Very good question. The ratings that PAC has on there web page are what I went by. What the actual coil bind is for a specific spring may vary but I'd rather go by the manufacturers specs.

Welp an update is that I have the new 614-16 locks in and I measured and they set me up beautifully at a 1.775" installed height and I still have plenty of rocker arm clearance with the Comp Pro Mag rockers. I will say that it would have been a nice tip to know to start the valve stem seal on before using the tool. I kinda shredded the first one I tried to install. I will say that the most tedious process that takes the longest is just getting everything set up to the correct specs and waiting on parts. Now that I have everything set up good to go it's just a matter of putting the time in. One cylinder is down seven more to go.

Thanks to you all for your help in getting these springs set up correctly!

kyle97

PAC is a little inconistant in their coil-bind ratings on their website (for the 1518/1218 they show both 1.096 and 1.140, and then there is the original comp spec of 1.086) I called and clarified with them during my spring install -- the 1.086 rating is the spring's true coild bind height, and the 1.14 rating figures in a mimimum clearance of 0.054 to coil bind.

FBodyBros

i just put in the 614-16 locks, set me up at 1.8

krillformula

Then you need to shim.
Did you check every spring?