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Something else to think about is ignition timing curve. They had a full centrifugal distributor with 9 degree advance plates and very light springs. Combine the 9 degree plate, 16-18 degrees initial, light springs and you had 34-36 degrees total at 1100-1200rpm. That would definitely boost low...
The key to geoff's post is the auxiliary discharge tube. It's under the velocity valves when they are closed. To my knowledge it's only used on carbs with the velocity valves. Basically it can eliminate bogs or hesitation at full throttle. I know that on the two carterbrocks I run there's...
This a copy of the old jetting tips for those carbs, but for use with a single carb dual plane intake. Basically it is showing the user how to add a drizzler to the secondary nozzle discharge tube. A .040" hole is drilled from the under side of the discharge tube with a .110" approach hole. This...
That manifold with stock carbs was never intended to have a bog or hesitation. The problem is they're the wrong carbs. Original 3447 carbs were larger but had velocity controlled secondaries. The carbs you have were intended to be used with dual plane intakes and small port/small valve. Small...
do i understand that you don't have the velocity valves in the secondaries? are these the small afb's that were used on early 383/413/426 engines? the factory 3447 and 3705 carbs had velocity controlled secondaries.
I use a .510 lift solid cam with rpm heads. I use a spring a little lighter than what came with the heads. I think the single spring that comes on a rpm head would be good enough for your cam.
i took my car completely apart like you did. only bad metal i found was a broken trunk extension on the passenger side. everything else was grandma's door dings. when i bought my car there were three of us building early b's. one was a '64 belvedere 2drht; a lot of sheet metal work, other was a...
i would consider what your doing as a near stock plus build. i've used the summit 6400 in a 9:1 383 build and thought it was a good driver cam. i've used the comp cams magnum replacement (21-305-4) in 440's before. this cam is a little gentler than the xe268. for a more performance build i used...
the 440 source rods i used were 734grms, .990 pins, and had a mopar big end. side clearance with these rods was about .020"-.025"; better than the .045" i had with the CAT rods i took out. i don't think those rods aren't available anymore; may have been too light for some extreme builds. pistons...
I've built a couple of big chevys. I was thinking stock pistons and rods were around 750grams each. Noticeably lighter than Mopar. I used icon 836 pistons and some light 440 source h-beam rods.
I had did some engine work for some folks using light pistons and always wanted to try them for myself. I ended up taking about 3/4 of a pound off each cylinder with a piston and rod change vs stock. I also got fairly **** about bearing and rod side clearances. I ended up with the smoothest...
This. Kb184 was designed for the open chamber iron head and pump gas. But, following the instructions that are provided with the pistons is a must but and isn't difficult.
I just tried the tin foil test on my car. This test showed it may be possible to run a ch4b but it'll be a little tight. Not much extra room for engine torque over. If it were me and I wanted to try this I would very carefully mock it it all up first. There won't be room for a 5/16" insulater...