Originally Posted by 454C10
This is one of those, "if it ain't broke then don't fix it" situations. Going to a bigger cam, especially a voodoo or extreme cam increases the chances of the cam going flat and eating up the engine bearings.
However, more cam would work better. I would use an old school Comp Cam 292H (244/244, 110 LSA, 0.501"), as it is a lot less likely to go flat due to softer ramps Get the cam hardened and use an oil additive (zddplus.com). Plus you don't need a split duration cam with those heads. Should make power a little past 6000 rpm in a 400 cid, 6500 in a 350.
I DO like your thinking lol, i normally go under the same rule, I'm guessing the 292H will work as well as say the XE284H right? I do run the lucas "zink" additive, so far i've had no problems with both cams i've run, the other seemed to be a bit much & was hard to tune as it only got 6 inches vacuum, even advancing it didn't help much, it too was a single pattern, here are the cams i've run, now running the smaller one.
Doug Herbert FT Hyd. 510/510, 245/245 @50, 108/104 3000-7200
Cam in there now.
Lunati Barebones FT Hyd. 465/488, 224/234 @50, 112/107 2000-6000
The smaller cam is pulling 16 inches vacuum but fizzles out at around 5800
The car is a 78 cutlass, 3200 lb. with me