i was reading in my old buick book. it says for the best possible top end in a stock buick,the 1368091 camshaft with a 2 1/2 degree offset key[available from reynolds buick in covina, california] is suggested.this cam allows a .461-inch lift at the valve instead of the normal.441 lift. thats the first i ever read that it had .461 lift and not .431-.441. no wonder Doc always says it was a good cam back then, with a 109 LSA and 20-30 more lift.
It could be a misprint. The info from Dennis Manner puts it at .439/.441 Wish I had an original to measure, but all I have are the later ones with the 114 lobe center. I did see the original magazine article. Maybe 'Blueprinting Buicks for Action' ? I'll have to dig it up. Several magazine article recommended that cam. It was a stock grind, and apparently better than the later one.
Walt, How would you go about measuring the lift? I have an original 091 that came out of the MZ. 3-4 of the lobes show visible wear but all the others look excellent and possibly enough data could be obtained from it.
Micrometer would suffice. Measure the base circle (perpendicular to the lobe), and again at the peak of the lobe. The difference would be the lobe lift. According to my notes, my '66 401 cam had 0.270" intake and 0.261" exhaust lift at the cam lobes. I measured my cams in the block, with a dial indicator on the lifter, and a degree wheel on the crank. Turn the engine 10 degrees at a time, and record the lift. Repeat that about 20 times and you have enough data points to plot the lobe profile on paper. Then I did it all again using a solid lifter and the dial indicator on the valve retainer .....Now I have valve lift profiles for cams with stock rockers, Tom's roller rockers, and some Buick adjustable rockers.:grin: It was a fun project for a cold winter day..... BTW, Comp Cams has a 'High Energy' 260H grind with 0.447" lift, 212 deg duration, and 110 deg lobe separation that could be the modern equivalent of the old 091 cam. Can't say how the open/close ramps compare to the original tho.
So the 091 was more of a top end cam? I would like to see a profile on it and see how fast it starts lifting.
after looking at that closer walt I might go out and tear open my 63 401 setting on a stand and see what # are on it. The 63 and 64 look close to the 091. Oh I almost forgot,its gonna be 100 again to day so it will have to wait
its in buick muscle cars 1965-1970 compiled by r.m. clarke. great book lots of old road tests. yes Walt blueprint for buicks. the 2 1/2 degree retard with help a little for the top end too.
Here's a cool article from the August, 1965 issue of CAR LIFE. It mentions the 091 cam, but doesn't give lift specs. http://wildaboutcarsonline.com/memb.../1965-08_CL_1965_Buick_GS_Drag_Racers_1-4.pdf
