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homemade procharged efi manifold ideas #2646310
04/18/19 02:07 AM
04/18/19 02:07 AM
Joined: Dec 2006
Posts: 4,329
aotearoa
rebel Offline OP
master
rebel  Offline OP
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aotearoa
I'm thinking of going pro charger in the next couple of years & was thinking making it port injection efi. I have this idea in my head of using a dual 4bbl low rise manifold, weld stubs onto the ports to drill out for the injectors, make a plenum box over the top of the carb flanges & adapting a throttle body on the front. Edlebrock make a manifold that i quite like, except its for an RB motor & i have a B block. So, not being afraid of fabricating my own parts, I was wondering if my plan is fessible. I have my own gear to port heads so i could cut open all the plenum space under the carb flanges to make a bigger plenum, do any pro chager guys on here think this is a project worth persueing? I just dont want an agricultural bent pipe poking into the top of my carb. my engine already sits quite high, i'm trying to keep it low & stealthy. Opinions from any that know are greatly appreciated.

Re: homemade procharged efi manifold ideas [Re: rebel] #2646313
04/18/19 02:59 AM
04/18/19 02:59 AM
Joined: Jan 2007
Posts: 633
pennsylvania
poboyengineering Offline
mopar
poboyengineering  Offline
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Posts: 633
pennsylvania
I've seen a bunch of the Offenhauser dual quad manifolds adapted for roots blowers. The mods you are talking about would be easy on one of those. And they made them for the low deck, I had one on a 383.


It may be ugly, but it sure is slow.

Girls comb their hair in rear view mirrors and the boys try to look so hard....
Re: homemade procharged efi manifold ideas [Re: poboyengineering] #2646326
04/18/19 06:18 AM
04/18/19 06:18 AM
Joined: Mar 2006
Posts: 7,654
MI, usa
dvw Offline
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dvw  Offline
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MI, usa
I'd use the Indy madman instead. But why not just a single plane with a throttle body?
Doug

Re: homemade procharged efi manifold ideas [Re: dvw] #2646348
04/18/19 07:59 AM
04/18/19 07:59 AM
Joined: Dec 2006
Posts: 4,329
aotearoa
rebel Offline OP
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rebel  Offline OP
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aotearoa
Originally Posted by dvw
I'd use the Indy madman instead. But why not just a single plane with a throttle body?
Doug

i want to keep it low, if i built a plenum, it would be no higher than say a Dominator carb.

Re: homemade procharged efi manifold ideas [Re: rebel] #2646390
04/18/19 09:38 AM
04/18/19 09:38 AM
Joined: Jan 2003
Posts: 6,227
Tulsa OK
Bad340fish Offline
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Bad340fish  Offline
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Tulsa OK
I don't see why it wouldn't work, the box plenum seems be real common in forced induction applications.

I have the itch to go boost and would probably have a top built for my tunnel ram with a front or side mount throttle body like you mentioned. If I did that I could put my stock hood back on.


68 Barracuda Formula S 340
Re: homemade procharged efi manifold ideas [Re: Bad340fish] #2646576
04/18/19 06:40 PM
04/18/19 06:40 PM
Joined: Dec 2006
Posts: 4,329
aotearoa
rebel Offline OP
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rebel  Offline OP
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Posts: 4,329
aotearoa
Ok so far no ones knocking this idea, next question, can a dual low rise manifold be ported to max wedge?

Re: homemade procharged efi manifold ideas [Re: rebel] #2646593
04/18/19 07:52 PM
04/18/19 07:52 PM
Joined: Dec 2004
Posts: 9,528
Rittman Ohio
fourgearsavoy Offline
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fourgearsavoy  Offline
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Posts: 9,528
Rittman Ohio
Well if you are already welding the injector bungs you can add some material around the ports so you can begin hogging it out to max wedge size shruggy
Gus beer


64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60

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