cobra rocker arm ?
03-18-2008, 06:02 PM
#4
3rd Gear Member
Join Date: Feb 2008
Location: Florida
Posts: 836
RE: cobra rocker arm ?
Improper rocker geometry, excess valve train noise, excess wear. They don't always need shims, but you have to verify the roller pattern on the valve stem to see if/where the shimms are needed.
03-18-2008, 09:18 PM
#5
6th Gear Member
Join Date: Nov 2005
Location: Rochester, NY
Posts: 8,467
RE: cobra rocker arm ?
ORIGINAL: PJC Racing
Improper rocker geometry, excess valve train noise, excess wear. They don't always need shims, but you have to verify the roller pattern on the valve stem to see if/where the shimms are needed.
Improper rocker geometry, excess valve train noise, excess wear. They don't always need shims, but you have to verify the roller pattern on the valve stem to see if/where the shimms are needed.
03-19-2008, 01:50 PM
#9
2nd Gear Member
Thread Starter
Join Date: Mar 2007
Location: lafayette, tn
Posts: 495
RE: cobra rocker arm ?
i've got a loss of power from start til about 3 grand and it goes away if i advance timing to like 30* something is screwed up and i have no idea what it is so i'm just trying to go over the things i wasn't sure about when i was putting this motor together i didn'tput the shims in cuz i was missing two of them but i didn't know if it would cause any problems
03-19-2008, 11:15 PM
#10
3rd Gear Member
Join Date: Feb 2008
Location: Florida
Posts: 836
RE: cobra rocker arm ?
Lack of shims will not cause this much IMO. I would start to look at the cam and or distributor. What cam, how was it installed (retarded, dot-to-dot, advanced), and was it degreed? What kind of distributor (TFI)? Are you sure its stabbed properly.