gemellocattivo.com

Thanks

Here it is on the engine and the 2nd duct plug about ready to glass

What happened to the drop gear? Is that another engine out operation?

Still broken as is cyl 12 so yes the engine needs to come out. My plan was to get the messy dusty work done then pull the engine and clean while its out then when it goes back in I'll be ready to drive. no that note I think I want to have a look at the hood too.... THINK it will still fit but want to be sure.

Added a bondo bung to the duct to mount an air temp sensor then painted it.






Then made the 2nd duct





This time I used almost no spray foam...just green foam and 90 minute drywall mud so I tied acetone for tge foam and pressure washed the mud ....just a little of the paint let in there but I don't think I care.

It was a long day  and I'll start with this.









Sadly still more concept that fact.  Why concept?  Well, there is no way to assemble it and I had to cut a hole in duct 2 to make it fit



The crisis before that was the passenger side didn't fit the plenum and needed to be reworked



while doing that in a rush the wiz-wheel nearly took my head off when it broke...didn't think much off it until I noticed in in the ceiling and wall about 20 ft away.



And when I actually looked as the 1st duct I realized I really hadn't spent the prop time it needed and had to re-do that and repaint it.

Hopefully stupid question: doesn’t the engine move relative to the body? If so, how is this being compensated for?

The answer is a little. The original V8 is flat plane and vibrates quite a bit so ferrari used pretty fancy mount to let it bounce around to its heart content but I don't have those anymore. I switched to TR mounts that were designed for a very smooth running flat 12 and so are quite solid...not actually solid but I don't think the engine can move more than about 1-2mm....the rubber just isn't thick enough to allow more I don't think.

...but yeah.....everything is packaged pretty tight. On that note the passenger duct issue seems to be a little that its not bigger than the plug but also that the flange on the airbox is about 1/4" higher than my tape was holding the plug and together it doesn't fit. The plan it to put so mud inside with a bit of foam going through it and reform the problem section but that will need to keep a week or so as my time has run out and I have other stuff to attend to this week.

I'm thinking the easiest way to solve the assembly issue is the just cut the ducts back and 3D print couplers.  I my even get fancy and put o-rings in them so nothing cranks as the engine moves around....right now the flanges are loose slip fits which lets it move but obviously means they leak.

What about 3D printing molds and casting your couplers out of RTV silicone? That would sidestep the need to include O-rings, and give you that wiggle room.

I e never messed with that before...but yeah I guess. Also there are rubber like printer resins I could try to just print rubber parts.....I do like the casting thought though as that material is likely better than the print resins

I've never done it, either, but the qualities that make silicone good for being a mold material should make it good for casting this kind of part out of. It flows well, releases gas/bubbles, and has excellent heat resistance.