For the longest time, I have been interested in doing a triple carb engine.
Because of certian software and hardware restrictions on the stock EFI unit on my X-FLOW engine, I've decided to lay it asside for a while.
I've found some calculations on ideal venturi sizes for independent runner intakes. I've been looking at Jacks six carb set-up for many years, but have recently come into a cash crop of 350 cfm Holley carbs.
Most of us here see only IDF or DCOE Webers as options, but I'm looking at a set of 350 cfm Holleys with tiny 30 mm venturis (1.1875") and looking at mating them with the current tractor tech EFI cam I have in my 250 six.
I've been studying this graph,
and done some rearranging to this. It produces the carb size in mm's via the LN function at 6, 8 and 10 000 rpm, so its out of range for the 3500 to 5000 rpm our stock sixes often do.
I want to see what happens at 4000 rpm with a very restrictive carb on an engine which normally doesn't like to rev much. I'm predicting the low end torque and 4000 rpm power will be excellent with these carbs. Time will tell.
I'm sorting out an adaptor plate for my stock intake, and decided to make it so I could run a stock 2-bbl and then hook up two outer 350 carbs when I got my gear sorted out. I have to certify this car, so I'm thinking it might as well have all the good stuff on it!
Because of certian software and hardware restrictions on the stock EFI unit on my X-FLOW engine, I've decided to lay it asside for a while.
I've found some calculations on ideal venturi sizes for independent runner intakes. I've been looking at Jacks six carb set-up for many years, but have recently come into a cash crop of 350 cfm Holley carbs.
Most of us here see only IDF or DCOE Webers as options, but I'm looking at a set of 350 cfm Holleys with tiny 30 mm venturis (1.1875") and looking at mating them with the current tractor tech EFI cam I have in my 250 six.
I've been studying this graph,
and done some rearranging to this. It produces the carb size in mm's via the LN function at 6, 8 and 10 000 rpm, so its out of range for the 3500 to 5000 rpm our stock sixes often do.
I want to see what happens at 4000 rpm with a very restrictive carb on an engine which normally doesn't like to rev much. I'm predicting the low end torque and 4000 rpm power will be excellent with these carbs. Time will tell.
I'm sorting out an adaptor plate for my stock intake, and decided to make it so I could run a stock 2-bbl and then hook up two outer 350 carbs when I got my gear sorted out. I have to certify this car, so I'm thinking it might as well have all the good stuff on it!