Engine mockup with Independent Throttle Body Intake

[Anonymous]

I was bored and messing around with my ITB setup, and decided to mock it up on my bad motor, since that is what it will be going on eventually. I didn't yet have my mandrel bends, so I had to use wooden blocks instead. lol, I think it looks really sweet though, can't wait. The throttle lonkage will be a bitch for sure. They are a little too close together, but it can be fixed rather easily by just bending the mandrel bends a bit. The only other issue is that a vacuum line coming off one of the sets runs right into the other throttle body. But it is just a barbed fitting and can be fixed with not too much trouble. Here are a few pics...Tell me what you think...

[DEI37]

RE: Engine mockup with Independent Throttle Body Intake

What are you doing for an air filtration system? I see that being a problem.

[Anonymous]

Well when the time comes, here is what I'm having done. It will be set up like that of a SBC, the filter sitting on top. The bottom plate will act as a flange, and it will sit between the air horns and the throttle bores. I'll lengthen the studs so the horns bolt down. Then I'm going to put the 1/8"(or 1/16") piece of steel, chromed, with the 6 48mm holes drilled, and the 12 bolt holes drilled on. After this I'm going to custom order a K&N filter, and specify the length I'll need. Then just wrap it around the steel piece's shape. The ends of the steel piece will be curved up so it won't slide out. For the top, I'll be using a 1/4"(or 1/2") thick piece of plexiglass. I'm having a guy from the Fiero boards CNC machine it, it will have drilled into it the following. Then I will have 4 studs, 2 from each set of throttle bodies from between the air horns, stick up and have chromed nust on top. It will look awesome, you will see the writing in the plexiglass, but still be able to see through it, staring at the throttle plates and such. I will not be able to incorporate the black plastic piece that says 3.4L TDC from ym Z34, so I figured I'd do this instead. Pretty complex for an air filter, but I want this job to look very professional. And then I'll be using ome sort of scoop or cowl on the Fiero decklid, since this won't clear. So it might even still be cold air

3.4L Twin Dual Cam
____Fiero GT____

[PlatinumZ34]

I dont care whethor that works or not, that looks awesome! very nice.

[5SpdGTP-91]

You inspire me

[Anonymous]

Thanks guys, I appreciate the positive feedabck.

But I feel too good without the negative, SappySE107 or dykz34 surely have somehting to say. lol

Its cool, and far from even being started. I just couldn't wait to see how they looked. A little too close together, but I will 'fix' it.

[TheProfessor]

looks pretty good
kiss your low rpm power band goodbye though

[Anonymous]

Yah, I'm shooting for a power curve from 4500rpm to 8k, making max power at 7500-8000. Below that I could care less what happens, so long as it skyrockets come 4500-5000 rpm.

[Juglenaut]

Good luck

[Anonymous]

Thx I'll need it!

[34T]

awesome Aaron; as much as anything the simple LOOKS is ....... well, awesome. I am looking at the injector bosses and the throttle linkages and just wondering if you tried swapping sides with the two sets; to see if that would improve the access to the linkages but maybe more importantly give the injectors a 'straight shot' in the same direction of the airflow. That might be a big deal and help fuel disperse more completely WITH the air's path rather than ACROSS the direction of flow. Pros and cons, I am sure, but just a thought.
You might also take the shorty air horns off and incorporate that shape into your air cleaner's bottom plate; either way it will amount to the same thing. You might bend the air cleaners bottom plate into two simple "trough's" of sorts tthat would have the air intakes at the very bottom. Just some thoughts. But wow what an impressive looker.

[Anonymous]

Well I can't switch them, the fuel rails will not clear each other. THey are already very close to each other, and with the fuel rail sticking out like it does, they wouldn't fit bewteen the V. Also I like the idea of fuel flowing across the air flow, it will mix it very throughouly I think. It would probably help, but not very much and not worth totally redesigning it for it to work. I thik I'm just going to build like a box around the stacks, this will be easiest, look the best, and still give optimal performance.

[Will'sFiero]

If you don't mind my asking, how much did that setup cost?
I'm thinking about something similar for my Northstar eventually, and I'd like to know what I'm in for...

Those are 48 mm TB's, right? how much HP will each one support?

Know any place that does sliding TB's?

[Anonymous]

They were about $1200 for the entire setup. This included the air horns, the custom fuel rails, and the throttle bodies. I don't know what each one individually will support, but the guy at TWM said 48mm was good for anywhere from 340 hp to about 480, also at higher rpm, not great if you want to make 400hp at 3,000rpm. But at 8 or so, they worked good. I really didn't spend much time contemplating size, although i should have. I went with 40 originally, although RacerX11 told me to use much larger(He suggested 4. Well i got the 40s and they were much too small, so I then opten for the 48s.

They make kits for small block chevy's that inlcude the intake manifold, then the TBs bolt to it, they include linkage as well. A great system, but it costs. Mine was made for a Porsche, but is pretty V6 generic. Looking at www.twminduction.com, it looks as if you can buy 2 sets with 4 each, or 4 sets with 2 each. This all depends on your setup. They aren't cheap, but you won't find a better intake.

[DEI37]

Hey...any more on this little project?