Ok , back from a long day at the shop.
Ran the 3 side draft setup. It was somewhat of a bear to fit it up. Hit the front header tube, also the header tube braces. Sanded the intake to fix that.
Engine started pretty good and idled high, had trouble getting a good idle. Ran some light pulls and found good tq readings and response. Decided idle was not so important and ran pulls to 6200 rpm. tq would hold 290+ for more Rpm than the 4 bbl did and saw the first 290+ hp #'s. Strangely the hp would drop about20-30 hp at the same place it did with Langdons Headers.
So we put the 4 bbl back on and duplicated the problem, after checking valve springs, ignition and compression it was found out the balancer was loose.
That is where the problem lies. Harmonics have got me by the tail. On Sat the motor is getting pulled and opened up for inspection. The balancer was wiggling and upon trying to pull it it wedged, so decided to wait till morning for a cold engine.
If needed, I have more cranks and can balance it for installation. Also have a good quality HP GM balancer. Still have alot of test planned and hate to quit now.
Well enough for today, just poured a big margurita and going to watch a movie with the kids. Tom
