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ok - time for the recap
get 5 gallons of Sunoco Ultra 93 and headed over to make some pulls
We bolted the engine up the day before so we were ready to make some pulls when we got there.
It fired right off - good sign!
Made the first pull after a warmup, set timing, and check for leaks.
No oil or water leaks were a damn good sign of things when we were warming it up.
1st pull was mild as we were seating the rings, as well as making sure the Holley Ultra HP 750 was jetted close.
With everything good to go the hammer went down - we made the pulls from 3000 to 5600 as it started dropping off after that.
What we wound up with was:
511.7 hp @ 5400
&
566 ft/lbs @ 4200
Flat torque curve does not describe this motor - there was 519 ft/lbs @ 3000 and stayed over 500 ft / lbs until 5400
That's averaging 515 ft/lbs for the entire run!
We changed the carb to an 830 & got within 1 hp of the 750 - seems to me the carb is not limiting the engine at this point.
I was surprised that a stock casting eddy head could pull that much power, I was expecting under 500 for sure.
I'm kinda glad things were uneventful in terms of problems, it was just an easy Sunday afternoon!
ok - time for the recap
get 5 gallons of Sunoco Ultra 93 and headed over to make some pulls
We bolted the engine up the day before so we were ready to make some pulls when we got there.
It fired right off - good sign!
Made the first pull after a warmup, set timing, and check for leaks.
No oil or water leaks were a damn good sign of things when we were warming it up.
1st pull was mild as we were seating the rings, as well as making sure the Holley Ultra HP 750 was jetted close.
With everything good to go the hammer went down - we made the pulls from 3000 to 5600 as it started dropping off after that.
What we wound up with was:
511.7 hp @ 5400
&
566 ft/lbs @ 4200
Flat torque curve does not describe this motor - there was 519 ft/lbs @ 3000 and stayed over 500 ft / lbs until 5400
That's averaging 515 ft/lbs for the entire run!
We changed the carb to an 830 & got within 1 hp of the 750 - seems to me the carb is not limiting the engine at this point.
I was surprised that a stock casting eddy head could pull that much power, I was expecting under 500 for sure.
I'm kinda glad things were uneventful in terms of problems, it was just an easy Sunday afternoon!
