Engine is in the back of my truck and I am ready to head out to Lima in the AM.
I run on Friday, so I am looking forward to seeing the Y blocks do their thing tomorrow.
I spent yesterday making a set of larger headers (2" straight instead of my 1.75-2.00 step). Tried them out this morning, along with some swoopy looking NASCAR tri-Y merge collectors. Changed the entire power curve - filled in a big "crater", but lost a ton mid-range and top. Score ended up within single digits. Just found yet another way to get to the same place.
If anybody wants to keep track the engine packages out this way "at home"...
EFI and old headers - peak torque 654, peak horsepower 738
Carb and old headers - peak torque 664, peak horsepower 726 (1.37 TQ/cube)
Carb and new headers - peak torque 652, peak horsepower 716
Looking at this you would assume that the scores would be very different - but in the 4000 RPM wide scoring range for Engine Masters they end up within 10-20 points of each other. They repeat in the 2450-2470 ranges for score. Not looking like a winner to me but you have to run the race to know how it comes out.
One "fun fact" is that the second combination has been repeating at 550+ torque at 3000 before dropping into a dip. The new headers cost it over 20 pounds at 3000 but almost completely eliminated the customary drop off.
What to do...