Okay, my man! Can I say on behalf of all of us that your time and devotion to the science is an inspiration to us all?
What you've done on the Big Six forum has immense value, and it is not unappreciated, its just sinking in that a lowly truck engine has so much grunt on offer with a just a bare minimum of 'scientific' modifications. You've dialled in many combinations, to benefit the personal tastes we all have!.
Here goes my oddball request, as you know I'm a rampant multiple carb junkie :roll: !.
Background is that Jack Collins did it in 2004, in the famed "Log is a Dog" post. (
http://fordsix.com/forum/viewtopic.php? ... ht=#104885 )
What I'd like to do first up, is
a)redo the definitive baseline 200 cubic inch engine to the best of your ability (good 1-bbl carb, good iron header).
200 cube I6
Bore 3.71 (30 thou over),
Stroke 3.126
rods 4.715
Deck 7.803
Piston 1.500, 6.5 cc dish
Stock 1978 'D8' log head, 26 thou gasket, 59 cc chanber, stock Intake valves and exhast
Stock 1.52:1 rocker ratio ,
Stock 1978 on wards 256 cam, stock lift was about 0.374", I'll have to find the inlet, exhast durations straight up (cam optimised, forgetting emissions).
Stock electronic ignition optimized
Stock 1946 Holley 1-bbl carb with 1.125" venturi
Find a) the baseline hp and torque
Input Values: (
http://falconperformance.sundog.net/compcalculator.asp )
Number Of Cylinders [Eye Six!]
Bore Diameter [3.71 inches]
Stroke Length [3.126 inches]
Combustion Chamber Volume [59 cubic centimeters]
Head Gasket Compressed Thickness [0.26 inches]
Head Gasket Bore Diameter [3.81 inches]
Piston To Deck Clearance [0.029inches]
Select Piston Type Dish [6.5 cc]
Volumetric Efficiency: 70%
RPM: 4000
Results:
Displacement, [cubic inches] 203
Displacement, [liters] 3.3
Static compression ratio 8.3:1
Cubic Feet per Minute required @ 4000 rpm, [cfm] 164
Estimated Horsepower @ 4000 rpm
88 hp Assumes altitude of sealevel, barometric pressure of 14.696 and 60° air supply to carburator
b)quantify the engine with three 350 cfm Holley carbs with 1.1875" venturis and 1.5" throttles. Assume a clean, 90% efficent intake and the stock 256 degree cam.
No head mods, no porting, just carbs and header.
