crane saturday night special dirt track cam 350 sbc

Those heads do not want the intake side restricted and the runners if you push the pushrod pinch back will finish out in the 170-175cc area and big cams with tight LSA or i should say a lot of overlap still pull decent idle vacuum. Racing my buddies 2015 550wheel HP mustang 6 speed 373 rear end car. That same car racing at the track with retarded timing. Watch the tachometer 1-2 shift about 7100 breaking up. My 57 chevy with 280H and tunnel-ram and single point distributor, points bounce at 7000 rpm. He has an 800 holley double pumper and hurricane intake 4' exhaust Borla 4' mufflers. Here it is running the 601's and retarded cam.īlack stepside. He stuck a much heavier lunati rotating assembly into it and retarded the cam from where I had it and went 12.20's. When it had my built 355' in it she went 11.5's.He dorked it up with a dial back timing light and ended up dialing in 70 degrees timing. 536' lift on a 106LSA it pulled 11.5' vacuum plenty in this power brake system on this 1976 stepside. Īnother set of 601 heads but 1.94-1.60 valves i built on a 355' with a crane custom grind. shift at 7400rpm.Ĭonverter stalled to 2200-2400 it was a bit tight. Here is a 292H on a 110 LSA pulls 12' vacuum plenty for power brakes and the 601 heads. The intake side needs the help on those heads and a single pattern cam is the way I go with them and if you are bucks up a bit a Tall tunnel-ram will add another 50+ hp everywhere.

Timing retarded in the burnout box to 28 total from the 38 it liked. Pulled ridiculous hard mid 13's in the 1/4 in a 3376 lb race weightĢ80H in a 57 chevy same 10.78 compression same 601 1.84-1.50 heads same 350' but 3650 race weight. I have went with a 268H on a 106LSA with 10.78 compression in a 350 with those 601 heads. The intake side is still kind of a putz but proper port and chamber shape trumps airflow numbers. The exhaust side if you raise the roof and stay off the floor will flow very well, on par with many 1.6 valved after market heads. It only gains a little more flow at the cost of chamber size because you must unshroud much farther to get the larger valve to not lay down in the upper rpm range.ĥ7cc chambers finished out with the 1.84-1.50 valves and I must go nearly 63cc chambers when finished with the 1.94' or upper rpm will be lacking. I found it is basically wasted time going with 1.94' valve. I tried different valve sizes and chamber shapes with the 601 head. I have built quite a few sbc engines using ported 601 heads and flowed many sets of them.

Crane saturday night special dirt track cam 350 sbc