NOW AT 270 HP @ 8000 RPM WITH MORE AVALIABLE
https://youtu.be/BxykOl63LVI
Finally the problem has been definitely identified. In that attached video you can see and hear the surging beginning in the first minute and half. The small dial control at the bottom of the panel is the steam wheel that allows the fuel flow adjustments on the fly.
You can see the hydraulic pressure and the foot pound readings on the panel. in the second of third minute you can see the adjustments being made to the fuel flow at 4000 the mixture was leaned 30% to clear and as the RPM was increased it was back a 0. Once reaching the 7000 RPM level the mixture had to be enriched up to 20% on the rich side to stop the surging.
Into the second to third minute the load indicator and the EGT indicators auto shut down. Tried to restart the units. The EGT was OK, but the load cell restarted zero at the load that was being applied. You will notice that at idle that it was at near zero. At the very end of the video, you will notice that it read -67, which has to be added to and number seen in the last portion when it was reading in the 270 to 280 lbs, resulting reading 347.
Had almost convinced myself that I had an exhaust block problem instead of fuel. I will admit that with out the dyno and without the fuel injection itself, I would not ever resolved the problem. Not saying that all is resolved. I have always believed that the carbs on the the TIIX were to large. You have to realize that this 5 minute run consumed 5 GALLONS of fuel. That's right 1 gallon per minute. I believe that as the throttles reached a near open position that the velocity of air flow was so low that the Bernoulli effect was near non existent and could not draw fuel, let alone move that volume thru the float valve.
The numbers work out to 260 HP by foot pounds and 270 HP by hydraulic computations @ 8000 RPM. There is still more to be had.
The way it acted at the 8000 mark with increase fuel, I believe that it is starting to have the exhaust blocking the increase in RPM and torque. First order will be to change to the GEN 3 Quincy megaphones.
All of this will have to take place after I repair the dyno. Each time the engine was shut down we sprayed the chain and sprockets with oil. The last run of about 3 minutes stretched the chain so bad that it dropped off one side of the main sprocket. Went to restart and it made a half rev and locked up. Thinking the worst, that the engine had broken internally. Quick check of chain confirmed the next weak link.
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