LoCost Mini Car/Truck?
Posted: Tue Nov 07, 2023 12:34 pm
I've been on a roll brainstorming ideas, figured I'd document them somewhere. And that's sort of the point of this forum. I don't even care if anyone else reads it at this point, I just want a place to put down my thoughts so I can find them later!
So, I've been dreaming of maybe building a LoCost sports car for decades. Since I first heard of the concept.
And since I quite autocrossing, I'm getting more into welding and fabricating as a hobby. Couple that with all the crazy autocross fab projects that I've done over the past 10 years, and I think I might be ready to tackle a project like this.
Last night, I caught a video of someone doing an engine swap on an old King Midget car. They doubled the HP from like 9 to 18 or something like that. But, it's such a small and light car that it was an absolute blast to drive, and still capable of 70 mph. This inspired me.
But, I'm past "open top motoring". Did it for many, many years. Wrecked my hearing with wind noise. Got tired of being sun-baked. Don't have any hair to blow in the breeze. Been there, done that. So, if I build something, it will be a coupe.
Lots of brainstorming has led me to this:
Rear mid-engine LoCost using a complete 2012+ Mirage front subframe and suspension in the back. 78 hp, 5 speed manual, VERY lightweight, simple, reliable and cheap. And I can run the stock AC compressor mated to a Vintage Air setup to have AC. I'll mount that unit on the rear firewall just between the seats.
The vehicle will serve three purposes: 1) local 2-seat runabout, 2) TRUCK, 3) occasional corner-carver.
I want to design it such that I can put a removable full-size roof rack on it, mounted at the corners. I want that to be 4.5 x 8.5 feet to accommodate 4x8 sheets of whatever. The car needs to approximately fit under that. That's right, I want the whole car to be no longer than 9 feet (just like my Smart car), and not much wider than 5 feet.
I've always thought that the tail lights on the back of a US-market Nissan Cube were cool, and would look great on the back of a sports car. So, I want to put the rear bumper and lights from a Cube on it, probably trim the fender bulges off of it and slab-side it forward from there.
Since I'm using Cube tails, makes sense to use Cube headlights. Conveniently, they have side markers and turn signals all in that one housing, and the styling matches the tails. I'll mount them lower than the Cube, in-line with the tail lights. May or may not use a partial Cube front bumper to surround them.
Front suspension and steering remain undecided. But, I'll probably source some circle track parts (S-10 style A arms) and a typical Pinto manual steering rack or something. I need to research that.
I should be able to duplicate the wheelbase and length of my Smart car. About 75" wheelbase, and 9 feet overall length.
Still very much in the idea phase. But, if I can pull it off, I'll have a versatile car that I can drive around town, AND do light homeowner "truck" duty when needed, all while taking up about half of my side of the garage. (I really like how the Smart car fits in the garage... so much more space for activities!)
The net result should be probably under 1200 pounds with 78 hp and around 80 ft/lbs. Should get over 60 mpg. It won't be "fast", but considerably faster than the Mirage... around 15 lbs/hp should be in "mildly boosted 1.8 Miata" territory. More than adequate for me to run around in. And it will be low and light, so very nimble.
My latest thought was to use a Miata windshield/frame and a Miata hardtop to GREATLY simplify the construction and appearance of the top of the car. But, of course, while a trashed donor Miata to get a windshield frame from would be cheap, a hard top would likely be over $1k. So, I might have to reconsider that. Maybe I'll just buy a cheap Mirage donor car and use the windshield frame and partial roof from that? It's actually got a nicely raked windshield, and the width would be right.
So, I've been dreaming of maybe building a LoCost sports car for decades. Since I first heard of the concept.
And since I quite autocrossing, I'm getting more into welding and fabricating as a hobby. Couple that with all the crazy autocross fab projects that I've done over the past 10 years, and I think I might be ready to tackle a project like this.
Last night, I caught a video of someone doing an engine swap on an old King Midget car. They doubled the HP from like 9 to 18 or something like that. But, it's such a small and light car that it was an absolute blast to drive, and still capable of 70 mph. This inspired me.
But, I'm past "open top motoring". Did it for many, many years. Wrecked my hearing with wind noise. Got tired of being sun-baked. Don't have any hair to blow in the breeze. Been there, done that. So, if I build something, it will be a coupe.
Lots of brainstorming has led me to this:
Rear mid-engine LoCost using a complete 2012+ Mirage front subframe and suspension in the back. 78 hp, 5 speed manual, VERY lightweight, simple, reliable and cheap. And I can run the stock AC compressor mated to a Vintage Air setup to have AC. I'll mount that unit on the rear firewall just between the seats.
The vehicle will serve three purposes: 1) local 2-seat runabout, 2) TRUCK, 3) occasional corner-carver.
I want to design it such that I can put a removable full-size roof rack on it, mounted at the corners. I want that to be 4.5 x 8.5 feet to accommodate 4x8 sheets of whatever. The car needs to approximately fit under that. That's right, I want the whole car to be no longer than 9 feet (just like my Smart car), and not much wider than 5 feet.
I've always thought that the tail lights on the back of a US-market Nissan Cube were cool, and would look great on the back of a sports car. So, I want to put the rear bumper and lights from a Cube on it, probably trim the fender bulges off of it and slab-side it forward from there.
Since I'm using Cube tails, makes sense to use Cube headlights. Conveniently, they have side markers and turn signals all in that one housing, and the styling matches the tails. I'll mount them lower than the Cube, in-line with the tail lights. May or may not use a partial Cube front bumper to surround them.
Front suspension and steering remain undecided. But, I'll probably source some circle track parts (S-10 style A arms) and a typical Pinto manual steering rack or something. I need to research that.
I should be able to duplicate the wheelbase and length of my Smart car. About 75" wheelbase, and 9 feet overall length.
Still very much in the idea phase. But, if I can pull it off, I'll have a versatile car that I can drive around town, AND do light homeowner "truck" duty when needed, all while taking up about half of my side of the garage. (I really like how the Smart car fits in the garage... so much more space for activities!)
The net result should be probably under 1200 pounds with 78 hp and around 80 ft/lbs. Should get over 60 mpg. It won't be "fast", but considerably faster than the Mirage... around 15 lbs/hp should be in "mildly boosted 1.8 Miata" territory. More than adequate for me to run around in. And it will be low and light, so very nimble.
My latest thought was to use a Miata windshield/frame and a Miata hardtop to GREATLY simplify the construction and appearance of the top of the car. But, of course, while a trashed donor Miata to get a windshield frame from would be cheap, a hard top would likely be over $1k. So, I might have to reconsider that. Maybe I'll just buy a cheap Mirage donor car and use the windshield frame and partial roof from that? It's actually got a nicely raked windshield, and the width would be right.