BB485
Feb 22nd, 04, 7:11 PM
Any one using them & how have you set lash
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Pat Kelley Feb 22nd, 04, 8:11 PM I'm not using that brand but am using the generic 817R lifters. I set them at .0015-.002" lash. BB485 Feb 22nd, 04, 9:10 PM Pat how would you set them without a feeler gauge0015 002 is really thin. Pat Kelley Feb 22nd, 04, 10:54 PM With a feeler gauge. .0015" is the smallest one in my set. The instructions call for .001"-.002". It is pretty hard to get them right with poly locks. Sometimes it takes several tries. Jsavdog Feb 23rd, 04, 2:58 PM I used them in my 454 and would preload them about 1/8 turn. I have heard of people setting them to 1/16 turn also. They have a deeper pocket to hold the pushrod in place when running them so loose. I was having a valve float problem and tried these as a possible solution. They may have got me 100-200 more rpms before valve float (around 6400 with these), but that is questionable. Jeff Jsavdog Feb 23rd, 04, 2:59 PM I am speaking of hydraulic lifters here. I was not aware of a pro magnum solid lifter but I could be wrong. Jeff roger69 Feb 23rd, 04, 4:17 PM Pro Magnums are a hybrid Hydraulic set with a very little ( or no ) pre load, some guys even set them with a slight clearance. When calling Comp Cams I have been told by two different tech guys how to set them , one guy said .002-.004 PRE LOAD and the other told me 002-.005 clearnace ! I have tried them both ways . Now I now run them with slight pre load ( 1/8 turn ) because of aluminum head expansion. They are noisey as hell. Do they help?? I dont know but I have run them to 7200 RPM in a 427 BB on a xe284 | ||