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I'll check what brand we have at work... but it's TERRIBLE... Off by 20-30c. So don't get it. :)

Thanks to 4U2. I threw together an accurately spaced model... should probably ignore the front holes, I improvised cause I can't remember where they are and they're missing from the DXF.

mk3brent@gmail.com Thanks!

Yeah, I see now what you're saying. I had planned on keeping the flange features in the final cast of the shell... which might be easier, I dunno. I'll work on it more next week. Thanks for helping out, definitely let me know what the new mold guy says.

How else do you do it? This would be my first shell style mold, so I'm still learning. What I've done for instrument transformers is relatively simple (the entire piece become encapsulated similar to this: ) So I figured I'd have to make a mold that produces one solid core insert... then...

You must work for GE... or an Amish farm.. :icon_razz Yeah, the time is what I don't have either. If you want, try to think of some ways to mount a core assembly to a base plate etc... that's what I'm working on right now.

Did a little more doodling to get ideas how to fix the core piece to the mold base.

That would help greatly as I'm about 230mi away from my supra. E-mail me at MK3Brent gmail . com

I was planning on making the first prototype mold with a 3D printer. We have a ZPrinter 450 from z-corp. Taken from their site: So some more planning is necessary... I guess I'll make some smaller scale molds first (1/4 - 1/8) whenever I get my next free time :)

Keep in mind, I don't plan on selling these per-say... but yes, that's an extremely loose model which will only be one style. I still need to get tolerances for all the 7M plenum bolt holes and outlets before definite models are finalized. As for right now, I'm just getting the basics as...

Yeah, thermal set plastic would work better since I'm afraid the epoxy won't expand and contract with temperature differences equally.

:)ABB Couple bucks. Looks like I'm going to do a thermal set plastic instead... unless I get the "ok" to get ahold of molten aluminum :)

Hey Manny, Thanks for posting help. Yes, the silica mix we have is basically how I'm making them. The machines I have access to in our rapid prototyping area is a 3D printer, it'll lay out layer by layer... which then I'll apply a high temperature stable acrylic to seal the porous sand...

Price should be minimal after recovery of mold purchase(s)... I'll probably make 2 or 3. I'm going to do some material analysis of HCEP epoxy we mold with at work... such as pressures, heat exchange, and strength... (I only have access to ash testing, and TG glass transition analysis.) My...

Okay, got it down the material I'm going to use to make the molds... I might even make the blank core out of the same silica... but basically it needs to be something that can disintegrate away after casting. I need to get some dimensions on the 7M plenum flange, as the ones in the models...

Has anyone thought of making FFIM molds and either doing cast aluminum or epoxy casting? The latest 2J intake manifold got me interested, so I started making some models. The mold would be expensive, depending on what material it's made out of... so that's when I...