Stock Stroke 340 Build with NC Engine Builder

gzig5 said

I would have loved to have been there for the pulls but not to be. I guess the session had several challenges with the equipment but the engines ran well. We didn’t get all the data we had hoped for but I’m solidly happy with the results. The 750 dyno carb was leaking and had to be changed for Shawn’s shop 950 Holley, out of the box with no tuning. Even with all that, the motor made 439.4 ft-lbs @ 4300rpm and 457.8 hp @ 6300rpm. The oil pressure is superb, as it should be with good bearing tolerances and the bushed lifters. The HP hadn’t peaked quite yet and may have had a couple more with a couple hundred more rpm but he didn’t see a need to push it. I have not idea what the timing was or if it was played with and maybe he can comment on the runs.

View attachment 1716372620

View attachment 1716372621

Click to expand...

Nothing better than reading a good write up on a Sunday morning with a cup of coffee-well done, very enjoyable. Sounds like good 'ole dyno issues, which is not surprising. It looks like a DTS docking cart with an older SF 901 absorber/console with Depac data acquisition a real mix of three separate systems-I could be wrong. Testing two different engines on the same day especially with a flat tappet cam requiring break in and likely a spring change is a nerve wracking and long day for the builder and dyno operator. I'm sure @NC Engine Builder had his game face on and checking off all the boxes. @gzig5 That is pretty stout torque for a little 340 and a super wide 2000 rpm spread between peak TQ/HP engine should be a rocket. With a solid flat tappet it would have been nice to see a pull to at least 6500rpm, maybe 6700rpm but there is likely a reason and it was probably a lack of time. I would love a good write up on how the lifter bushing process was accomplished. Thanks @gzig5 ! J.Rob