Daily Archives: March 27, 2018

Still working on the design

I can’t leave the house with the rain and thunderstorms and the flood watches, so I have been reading superhero books on my Kindle app and moving boxes representing assemblies around in my CAD program.

OK my current design method is to assign things a box that describes the space they occupy, rather than the actual object itself, and then move the boxes around until there’s no overlap. Some boxes are fixed, like the engine/transmission box and the body box, while some are not even fixed in size, like the radiator box that changes width depending on the radiator I’m trying to fit. I think there is a possibility the smallest radiator in the catalog will be enough to cool the Pentastar after seeing the stock radiator for one of the vehicles it is installed in by FCA. That simplifies packaging considerably, because I can figuratively put that radiator beside the steering box and have room left over for a bowling alley. The joker in the deck is the OEM radiator is double-row but the catalog radiator is double-double-row with  1/3  less frontal area but a 2.25X thicker core with more fins, and I lack the data to make a direct comparison. The “double-double” refers to the tubes in the core of the catalog radiator having more than twice the heat rejecting capacity of a round tube, making the double row core the equivalent of a 4-row. There is a simple formula for comparing radiators of different designs, but catalog descriptions rarely have enough information to allow its use. And that goes double in this case, with different chunks of the equation missing from the 2 catalog descriptions. But it is my SWAG that the 22″ catalog radiator will be roughly equal to the OEM radiator, especially after I learned the replacement OEM radiator was also used for much larger engines and is just sold as a replacement for the Pentastar because it fits the hole. Ima just hafta put a huge electric fan on the catalog radiator to make sure there’s enough airflow to remove the heat, which is what I would have had to do anyway, just maybe not as huge as I’m thinking about using now.

The radiator box combined with the steering box are the same width as the engine box, which is the same width as the firewall but extends a touch to the right because of offset to balance out my “big bones” sitting behind the steering wheel on the left. Which is a very roundabout way to say the radiator and steering box are together the same width as the firewall. And that I could install a wider radiator without increasing the frontal area of the car. This also means that there will be a large hole to the left of the engine that could be use as an escape path for cooling air, or a place to install an oil cooler facing sideways. Looking at the picture right now there are several places to install a small oil cooler, above the steering box there is a 5″ wide by 18″ tall space, there’s a 7″ tall space under the radiator that could run the width of the front end if the hoses would fit under the steering box. But as I don’t see any oil coolers near those sizes in the catalog…the question is moot.

And I just found a picture online of the engine in side view, with a tape measure in clear view to use to scale from and all the driven bits hanging off the front with the belt and pulleys exposed to measure. Something to make the engine box more accurate in the for and aft dimension, might mean a bigger box, might mean a smaller box, but either way it’s a more accurate box.

And writing note, when I get on a roll writing it’s pretty much stream of consciousness, but I still “feel” the punctuation and capitalization. What I don’t have a feel for is when I need a paragraph break. And my proofreader program knows fvck-all about paragraph breaks so I don’t get a blurb about needing a paragraph like I do about passive voice or homonyms. What I’m trying to say is I know I need more paragraph breaks in my writing, I just don’t always know where to put them.