Valve Spring Selection

Mike Hedger · 10-08-2007, 04:51 PM

I checked mine doing cam lift X 1.7 and it comes out to the .808 the cam is advertised as. Then I put it all together like you are going to run it but with 0 lash and checked it again and I come up with .799 at the valve. I tried three different rockers and they were all the same + or - .001 (Crane wide body rockers). But I have around 305 - 310# on the seat and around 800# open spring pressure so it is going to make things move around. I also run the spring within .050 of coil bind and they seem to last longer. I would guess that is why yours lasted so long they were close to coil bind so they did not surge when they were closing the valve.

10-08-2007, 04:51 PM	#10
Mike Hedger Junior Member Join Date: Jul 2007 Location: Kemah TX Posts: 93 Likes: 0 Liked 1 Time in 1 Post	Re: Valve Spring Selection I checked mine doing cam lift X 1.7 and it comes out to the .808 the cam is advertised as. Then I put it all together like you are going to run it but with 0 lash and checked it again and I come up with .799 at the valve. I tried three different rockers and they were all the same + or - .001 (Crane wide body rockers). But I have around 305 - 310# on the seat and around 800# open spring pressure so it is going to make things move around. I also run the spring within .050 of coil bind and they seem to last longer. I would guess that is why yours lasted so long they were close to coil bind so they did not surge when they were closing the valve. __________________ Mike Hedger S/C 4646 MPH Racing and Fabrication