Feel like my 440 should be faster

[Ozyduster]

It’s January…….plenty of time for tweaks before car season gets underway.

Pull the heads, have them milled to 80cc and the bowls blended.

Get a 9.5” converter.

If that’s still not enough, put some gears in it.

I would go gears before anything, biggest difference you will feel with any modification. Definitely needs the heads played with as be a slug with stock ports

 

[standup303]

Standup303, I feel your pain. I live near Parker, CO at 5800' and miss the power of my 340 when I lived near sea level in SoCal. I am running 10.05:1 actual compression, essentially stock 340 specs, but you lose 20-25% of your HP due to altitude. There were times at Bandimere when the indicated altitude was 8800' due to temperature and barometric pressure that day. Knocks well over 1 second of 1/4 mile times.
Understand that Bandimere will reopen in Hudson, CO.
"The family-run speedway, now led by Bandimere Jr.’s son, John “Sporty” Bandimere, hopes to have the new facility partially open by 2025, with full operations by 2026. While a partial opening may not be profitable, Bandimere Jr. emphasizes that maintaining the racing family’s legacy is the top priority: “It’s about keeping this racing family together.” Bandimeres Explore Relocation to Hudson, Colorado for New Expanded Facility | Drag Illustrated

BTW, what dyno facility were you planning on using? Not many left in CO.

I sure hope they move forward with the Hudson location! I was planning on going to the Carburetor Shop Mile High Performance Tuning.

 

[standup303]

Thanks for all the input. Definitely doing gears, leaning towards 3.91s. Also looking into converters. Need to finish up some steering work then I’ll dig into the rear end. If I do anything past gears and converter it will be next winter. Nice set of heads is definitely on the want list. Always learning more everyday about how to build these things.

I’ve been cruising FB marketplace and have seen a few decent condition double pumpers for sale. Doing homework on if I want to stick with a 750 or go 850.

 

[Illahe]

I sure hope they move forward with the Hudson location! I was planning on going to the Carburetor Shop Mile High Performance Tuning.

You may want to talk to Mike Jones of Jones' cams in the Carolinas. He recommends more lift on the intake lobe and not to much spread on duration for high altitude racing. Steve Taylor Carburetors said his Bandimere combination used smaller dimeter headers as well. For what its worth Racer Brown had the same comments as Jones cams when I spoke with him about setting up a high altitude combination. You can add 1.6 rockers on your intake to play around with the combination. You are fighting air density. Think about your engine having a least one point less of dynamic compression when your choosing cam and gear ratio combination for you base altitude.

Another route is "atmosphere in a bottle aka N2O." you wont have to change your dial-in as the air density falls off with the heat of the afternoon as you're going through the rounds.

 

[Dartswinger70]

"Retarded" I like that as mach as "doo-Doo"