Custom ITBs - DIY in progress!

[racerpat94]

Im new to this forum, but I have been on HT, Accordinglydone, D-series.org, etc. for years. Eventually this will be a full write-up, but for now I am limited to this beginner section.


Maybe this isnt my best option, but because I spend almost 20 hours per week in the Tech training build at school, Im going to attempt to build my own intake manifold/ITB setup. My college has a complete machine shop, and I have approval to use the schools equipment. Im basically just giving a friend (who is in machining classes) the design and measurements. I figure Ill use CAD to do the main flange, and use some aluminum tubing for the runners, and some modified bike throttle bodies. (Spaced appropriately unlike most set ups)

So techincally im just making an intake flange with the cnc machine. The idea stems from seeing all of the ghetto ITB setups using a chopped stock manifold, some radiator hose, and stock bike ITBs. Also from seeing Pirate Mcfred's adaptor flange.

I figure it would be better to have the runners perpendicular(when viewed from above) rather than tapered in like the stock mani and the ghetto ITBs.
Stock/DIY Itbs
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Aftermarket
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I will take plenty of pictures of the process, but before I get started I need a tracing of an OEM F22A IM flange! I dont have one here to measure from other than an extra B1 IM. I could get a gasket, but it wouldnt give me accurate outer dimensions. This is where you guys come in! If somebody was willing to trace their stock unit for me it would be greatly appreciated! Or if anyone has a better idea let me know!

[slick]

so you are wanting the outer dimensions or a outline of it? i have one sitting in my garage floor right next to the door

[Karl]

I would just get the gasket, your going to need one anyways.

[racerpat94]

Karl- you are right, but Im ordering one of Bisi gaskets in a month or so when I order my level 3 cam. YEEEAH! But from some of the pics, it looks like the gasket doesnt extend to the edges of the IM.

Slick- Ill try to find a picture of exactly what I need from the IM. I saw a thread on HT where a guy made his own tranny adapter plate by using tracings of the block and tranny. Kind of like when you were a kid and you would put a leaf under your paper and run your pencil or crayon over it sideways. Did anyone else ever do that or do I sounds nuts? Ha

[slick]

Karl- you are right, but Im ordering one of Bisi gaskets in a month or so when I order my level 3 cam. YEEEAH! But from some of the pics, it looks like the gasket doesnt extend to the edges of the IM.

Slick- Ill try to find a picture of exactly what I need from the IM. I saw a thread on HT where a guy made his own tranny adapter plate by using tracings of the block and tranny. Kind of like when you were a kid and you would put a leaf under your paper and run your pencil or crayon over it sideways. Did anyone else ever do that or do I sounds nuts? Ha

you sound nuts. i remember putting a piece of paper over stuff to trace it

[wed3k]

i actually have three flanges, two of which are angled and one is straight. ill eventually get around to it but it will probably be another 6 months.

remmeber to shoot towards the back of the intake valve, kinda like setting up your nitrous jets.

[racerpat94]

Here is the tracing method.