CrossFire/'7747

[David & Cheryl Haggard]

Ken,
> The cam I'm looking at is 204/214 at .050" and .420"/.443" lift,
> with 112LCA.

   What engine is this-- 305, 350, or 383? Even for a 305, this is a fairly
mild cam. For instance, the factory roller cam of my '88's 305 is 207/213 @
0.050", with 0.415/0.431 lift and 117 LCA.
   My new cam choice is going to be a CompCams Xtreme Energy roller, at
212/218 @ 0.050, 0.488/0.495 lift, and 112 LCA. Not a big change, but the
Xtreme Energy ramp profiles are VERY aggressive, and combined with the drop
of LCA by 5 degrees I'll get a considerable boost, yet keep smooth idle and
high  enough vacuum.
   For a 350 or 383, Bruce's 224 duration cam would be more like it.
   It all depends, of course, on what you're after.

Dave Haggard
   1988 Formula Firebird
   305 2 X 2-bbl CFI (under construction)
   http://www.newcovenant.com/firebird/


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