Finally dynoed my 487 Buick iron Engine . Too Much BS webt into this build ! All the Cheby boys had doubt & I actually was surprised too ! There is a ton of custom stuff that goes into a engine like this . I do believe its a 7500plus piece . After last week with better air and 1150 dominator we made 801 hp at 6800 rpm . I was having some scavenging issuse with Vacuum & oil pressure. So after we got it dialed in I was pretty happy , but new we were not done . Today after changing oil to synthetic Redline & crappy air we changed jetting in the 1150 left timing at 34 and made a few hits to 7000 it made 811 at 6900 . We then proceeded to program the digital box by laptop to 7800 and pulled to 6000 to check fuel curve . We switched fuel to Q16 and it kept wanting more jet ! After some calculations jets measuring and weighing the fuel we decided to bolt on the BiG 1250 QF ! One pull to 7300 it made 837 HP ! It was getting late so i told Bill Thats good for me . I am sure it would turn higher but why ? In better DA it was 801 6800 Rpm . Here is a break down of what the combination consists of . Fully filled 1971 Block Main girdle Channeled mains & extra holes in bearings Seal 1 piece BOP 4.380 bore Custom Gibbtec billet pistons Gapless top .043/.043 3/16 low Tension oil Gas ported Alum GRP 6.575 rods Stroked 4.040 stock crank ground down and micro polished counter weights . Neutral balanced w ATI balancer Cam is 271/277@.050 758 lift before lash Jesel 1.8 rocker Stage 4 heads 387 cfm @ .800 Heads by Al Dickson Pac triple spring . The biggest I could fit Opened push rods homes to fit 7/16 Trend Custom SpX cut up buy me , then welded & finished by Wilson Manifold 1250/1150 dominators 1.1/2 inch spacer Peterson SRE pump Custom Alum pan Custom SRE valve covers had to clearance for 7/16 push rod Fully overhead oiling system with special lines under Intake manifold . MSD dist BBC crank trigger SRE trigger bracket Custom timing cover SRE front engine mount plate
Congrats!! That's a great build using an iron block....And the stock crank, albeit ground down. I always love to see it and it always makes me smile when I see just how much fuel these Big Block Buicks gulp down!!
