MSefi.com read only forum (Jan.15,2018)

Hey Guys,
I am thinking of putting dual throttle bodies on a 400 sbc. The estimated HP would be about 400-450, does anybody have recommendations on what size throttles body bores and also injectors size. How would you hook up the IAC would you use both IAC's or just one? I assume you would use one TPS sensor. Just looking for a little guidance here.

Thanks

I posted the exact question. Im doing a 451 Mopar and 2 TBIs in a dual quad intake would be much cheaper than a 950 CFM TB. I would assume you would run 1 IAC and just wire up the 2X2 injectors like a single 4TBI setup. I calculated I would need 4 X 72 lb/hr injectors, dont know what is on a stock TBI out of a pickup, but maybe 2 would support 500-550 HP. Dont know about the fuel pump though. Maybe the stock outside the tank inline pump would not be up to the task.

Do a search for some of my posts, I have a dual TBI setup in the works and have posted info for other folks at various times. Too much info to try and repost here.

Duals on a 413 would be "color by numbers" for me to follow your build for my 400 based motor. Just different manifold (RB vs. B) Ill look yours up. And if you have any thoughts you would want to share with me before I start this journey, feel free and drop me a line pishta68 at hotmail.com. I am going to sell some carbs to finance this venture. Holley 850 DP, 1 new Predator with parts carb, 2 Holley 3310's and maybe my trusted Thermoquad. Plan on a megasquirt and 2 GM 2bbl TBI's on a dual quad Weiand or Offy. Stock looking with air cleaners