EXACTLY ... wyrmriderpmd400 wrote:Hi
Iv read plenty of articles, books and forum threads on cams. Iv studied a couple of vizards books, Jim hands Pontiac book as well as several articles and forum threads. Old school Pontiac says to go wide lsa and dual pattern cam. Vizard books tell me tight lsa and single pattern cam. Iv read recently on this forum that lower exhaust lift and less aggressive exhaust lobe is beneficial. So anyway, I'll get to the engine specs
Pontiac 461 - bore 4.18, stroke 4.21
Rods length 6.625
9.4:1 compression
Edelbrock p65 dual quad/dual plane intake
2 edelbrock 600 carbs
1 5/8 diameter/unequal length primary headers
2.5 x pipe exhaust. Mufflers to be used but not yet purchased
6x heads. Flow as follows
Lift Intake Exhaust E/I ratio
.100 76 54 72%
.200 134 117 88%
.300 181 154 85%
.400 219 178 81%
.500 229 194 85%
.600 229 202 88%
Car is a '72 firebird, 3500lbs
Rear is 2.41 or 2.73(have both)
Trans is a Richmond 5 speed, ratios are
1st - 3.28
2nd - 2.13
3rd - 1.57
4th - 1.24
5th - 1.00
Car is a street car. Power brakes are a must. Engine will never go above 5500rpm.
Any recommendations will be much appreciated.
Thanks
I don't read anything in this first post about a hydraulic FLAT TAPPET camshaft but, I do read "Any recommendations will be much appreciated".
Not until much later is it even mentioned.