4 bbl EFI intake conversion

[KendallF]

OK..I like this picture post thing; I thought I'd post a few more. This is a Weiand single plane intake that I thought would make a nice EFI intake for a production style head motor (serious 109 block, off-center stage motor, whatever..). Previously I've drilled holes and welded bungs into the runners; this of course leaves a big hole in the runner where the bung goes through and you have to be careful to align everything just so.

On this one, I tried something different: I machined flat spots at the bottoms of the runners, welded aluminum blocks on, and then machined the injector bungs all at once. I'm going to fabricate a sheet metal elbow to take either stock style or a Ford throttle body.

[REDS TTYPE]

lookin good :)

[Mike Licht]

Nice Kendall, I tihnk there is some power in that part if the ports can be made big enough. I been looking for one of those for a while

Mike Licht

[John Wilde]

Kendall,

I was going to do this for my stock block car.
I ended up selling the project. Nice work :rock:

[John Larkin]

How do you seal the alum block inserts to the intake? I know they are welded to attach them but there is a unsealed edge around the injector hole, right? Go ahead and slap me for picking your project apart. :haudrauf:

[KendallF]

How do you seal the alum block inserts to the intake? I know they are welded to attach them but there is a unsealed edge around the injector hole, right? Go ahead and slap me for picking your project apart. :haudrauf:

That's why I machined the runners before welding the blocks on..to avoid any gaps when I machined the injector bungs later. You can't even tell where the seam is, looking into the (dare I say it) bungholes. :lickit: The blocks are welded around their entire edges; the only place for leakage would be on the paired runners, and only across into the next hole. With a machined fit, I don't think I'm worried about a few molecules getting across. :fly:

[Louie L]

he he you :bootyshak said "Bunghole":bootyshak

[SuperSix]

That's why I machined the runners before welding the blocks on..to avoid any gaps when I machined the injector bungs later. You can't even tell where the seam is, looking into the (dare I say it) bungholes. :lickit: The blocks are welded around their entire edges; the only place for leakage would be on the paired runners, and only across into the next hole. With a machined fit, I don't think I'm worried about a few molecules getting across. :fly:

Maybe use some JBWeld between the two for a sure seal?

What's the advantage of using that intak? Better flow? More flow?

[KendallF]

Maybe use some JBWeld between the two for a sure seal?

What's the advantage of using that intak? Better flow? More flow?

I'm not Norb..I don't even own a tube of JB Weld. ;) This intake has more material and straighter runners than a stocker; it should flow considerably better with porting.

[turbodave]

NICE work!! If I brought my STG II intake down to you for modding it up for FI, is it the same principles you would use? The reason I ask, when I do get it "bunged" for injectors, I'd like them to point straignt down or slight toward the head and out as close to the edge as possible. That way I can be assured the injectors will be squirting as close to the intake valve as possible.
Again, Nice work!

[KendallF]

NICE work!! If I brought my STG II intake down to you for modding it up for FI, is it the same principles you would use? The reason I ask, when I do get it "bunged" for injectors, I'd like them to point straignt down or slight toward the head and out as close to the edge as possible. That way I can be assured the injectors will be squirting as close to the intake valve as possible.
Again, Nice work!

Can do..of course, after next term, FCCJ's machining program is going to close. That's where I've been doing the CNC work. Right now, I want my car done and running...anybody else's projects are a distant 2nd. :D

[Bruce]

I'm not Norb..I don't even own a tube of JB Weld. ;) This intake has more material and straighter runners than a stocker; it should flow considerably better with porting.

The only problem with runners it that they are a compromise. For whatever good you get in one range, you hurt another. Typically, they're tuned so that the down side is out of the power range. On a high rpm N/A that's one thing. For us mortals running stockish stuff, that's hard to do. While runner lenght governs at what range the work at, they also alter the speed at which a engine can change RPM, which when your flashing a converter might be an area of concern.

But, the drummer I march too is left handed, LOL.