by TRENDZ » Tue Feb 21, 2012 7:35 pm
I put in the 60lb springs(int & ex). The truck definetly responded positively. I would not say it picked up a bunch of power, but it "sharpened up" the way it runs, and it now has a more linear power output when in the higher engine speeds.
I made a valve spring compressor that worked out great for this job. It's similar to the tork brand tool in the fact that it compresses both springs at once, but it has more access to the valve stem locks, and you don't need to remove the head bolt to use it. I was a bit nervous about removing the head bolt and possibly disturbing the head gasket seal, so I came up with a little different way of doing it with this tool.
91 d350 1/2" supply lines, 2nd gen lift pump, regulator, 366, screwed, homebrewed afc pin, linkage mods, ported head, ported ex manifold, 351ve electrically controlled, 3" boost tubes, 2nd gen I/C, 4" ex, goerand