454 build and dyno test
#11
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Spent good part of day sorting thru minor problem's. Im using stock valve covers w .310 gaskets, tabs ground and cut out on these motors, tall ones wont clear the inercooler later, still waiting on gaskets to show up So i stuck a set of tall dart race valve covers on for now. Ive ran thesr w no issues on other bbc's. Well, on this one it had a strange noise in valve train. Pulled all o2 sensor wires out of the way, tore off valve covers, relashed the valves. Still noisy. Pulled vslve covers again, found tiny marks on them where rocker arms were hitting them on intake manifold side
held a straight edge acrossed bolt holes on both head and valve covers. Casting on vcovers sticks in MORE than cast iron on head. Swapped on other valve covers, noise gone!
held a straight edge acrossed bolt holes on both head and valve covers. Casting on vcovers sticks in MORE than cast iron on head. Swapped on other valve covers, noise gone!
#12
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After i tune this na the whipple sidemounts are going on. Theres alot of bad press about them BUT when they came out no one was really tuning them perfect AND they all ended up on motors that were needing a bigger supercharger. These 460 bbc are a good candidate for them. I tuned a hp 500efi with one on water last year and after dialing it in it really ran pretty good.
#13
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So we did get dyno runs in, started w my tune i did on 502 i built to sell my baja w that made 563 hp (flat top piston, iron heads that were slightly modded, highly modded mpi intake, twin 68 mm tb from tpis, 500efi cam).
So we were expecting 520ish hp, first mini pull to 5200 we made 518 w afrs in 11s. Took a little fuel out, pulled higher and higher progressively. This thing peaked at 5800/5900 and pulled easily to 6000.
Our dyno has two sets of software running independent of each other, depac and perf trends. On the depac we saw 573 hp at 5800, 558 ft lbs tq at 4800, bsfcs in the .54 range. Cf was 1.095 using j607. Ambient was in mid 90s yesterday here and humidity was fairly high. On perf trends, we saw 553 hp at 5800 and 548 ft lbs tq at 4100/545 at 4800
So we were expecting 520ish hp, first mini pull to 5200 we made 518 w afrs in 11s. Took a little fuel out, pulled higher and higher progressively. This thing peaked at 5800/5900 and pulled easily to 6000.
Our dyno has two sets of software running independent of each other, depac and perf trends. On the depac we saw 573 hp at 5800, 558 ft lbs tq at 4800, bsfcs in the .54 range. Cf was 1.095 using j607. Ambient was in mid 90s yesterday here and humidity was fairly high. On perf trends, we saw 553 hp at 5800 and 548 ft lbs tq at 4100/545 at 4800
#16
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So it made about 50hp more than expected ?, what will the whipple ad 100-125
#18
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#19
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nice job, btw Im still sending you my 2 sets of injectors, got side tracked with a boat issue..........imagine that....