Cam Questions

[Hotrodpaul]

Yes, I had those same concerns. The car will probably be driven less than 300 miles per year, only to cruise, and shows, etc. In Houston, 93 octane is available and I may run a booster as well. In the 80's, I had an L-79 Chevy II that I would mix in some 100 LL aviation fuel, worked well.

For lifter wear, I plan to run coolface oiling lifters with .024" drilled or edm hole, and a high zinc additive in the oil to ward off premature lobe wear.

The cam selection is the big one for me, I think the best combo would be a wider lobe angle, 112-114 degrees to help with vacuum and a later intake closing point to bleed cylinder pressure. Keep lift between .480-.520" and spring pressure max at around 280-300 lbs. I am leaning towards the 30-30 or 2nd design cams. Car will have mildly ported 292 Turbo heads, 1.6 roller rockers, Headers, low restriction exhaust, and remaining parts will be 69 Z-28 items, except for the 350 LT-1 short block. The extra cubes will help the idle and vacuum too. From the outside, it will appear to be a relatively stock Z-28, although the angle plugs may give it away. Other driveline items include M-20 trans for stoplight racing, and 3.73 gear with old school traction bars. Should be fun with around 400 Hp on tap.

Paul