And here are the results:
Race Gas: 505.8 lb-ft @ 4100 RPM, 455.4 HP @ 5200 RPM
91 Octane, 10% Ethanol Pump Gas: 507.2 lb-ft @ 3700 RPM, 444.2 HP @ 5000 RPM
Manifold vacuum at 850 RPM averaged 11.5 inches, which should be sufficient for power brakes.
I was very pleased with the performance of this engine, especially the torque. I ran some of the first tests down at 2500 RPM, and even there it was making over 400 lb-ft. It has a really nice, wide torque band, and should make a great street motor.
Best race gas results were obtained with the 1" Super Sucker installed, and 34 degrees total timing. The Super Sucker didn't provide a big advantage though, less than 1 HP on average. The timing was increased in 2 degree increments from 30 degrees up to 36 degrees during the tests. No change was observed between 34 and 36 degrees, so the timing was backed down to 34 degrees for most of the race gas testing. Jetting for the 800 Holley settled at 71s in the primary, and 81s in the secondary.
Best pump gas results were obtained with the 4 hole spacer, but due to the insignificant difference with the Super Sucker on race gas, the Super Sucker was not tested with the pump gas setup. Timing was again optimized for the pump gas setup, and this time 32 degrees total turned out to be optimum. Jetting remained the same as for pump gas, and the engine ran a bit leaner on A/F, but still in the 12.5:1 to 13:1 range.
Here are the two dyno plots for the best race gas and pump gas pulls:
Also, here is the Super Sucker vs. 4 Hole spacer on race gas:
I had installed beehive springs on this engine in the hopes of improving the RPM range of the hydraulic roller lifters. It didn't seem to have too much of an effect at first, and early on I saw the typical hydraulic lifter tipover at around 5300 RPM on this engine; the graph below shows one pull where it was quite pronounced. The green tangent lines added to the graph show the discontinuity in power output that is typical of this issue:
What I noticed, though, was that as the oil temperature continued to increase during the dyno session, this issue became less pronounced. You can't really see it too much in the best race gas pull, and the it seems to be altogether absent except for possibly the last data point on the best pump gas pull. By this time the oil temp had gone past 200 degrees. I was running Valvoline VR1 10W-30 in this engine, and had the lifter preload adjusted per Morel's specifications, so I don't think there was much more that could be done. Me, I'm sticking with solids
Since I dynoed this engine alone I was not able to take a video of it running on the stand. However, the dyno software has a playback mode, so I took a video of my computer screen on a playback of the race gas pull and posted it on you tube at the link below.
https://youtu.be/s-eTZWzRNmoBy the way, this video has been on my you tube channel for the last 24 hours. One of you could have looked there, and nailed the answer LOL!
As mentioned in my first post, there was nearly a zero weather correction for this engine, due to the 45 degree air entering the engine and the relatively high barometer, and low humidity. Raw HP and torque numbers were 509.8 and 458.8 on race gas, and 511.0 and 447.5 on pump gas. You don't see the raw numbers higher than the corrected numbers very often...
