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
Dual tbi throttle bodies
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Re: Dual tbi throttle bodies
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.
Re: Dual tbi throttle bodies
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.
Needs to get the toes out of the water and just jump off the diving board!!!
current EFI project:
65 Chrysler 300L, 413, working on inline dual GM TBI units, will run with MS2. Hoping to have factory-style appearance.
current EFI project:
65 Chrysler 300L, 413, working on inline dual GM TBI units, will run with MS2. Hoping to have factory-style appearance.
Re: Dual tbi throttle bodies
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