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This thread is just me thinking out loud and pondering. I am fairly certain I won't take this on any time soon, I have many other things to focus on, and it wouldn't be a cheap project by any means.
I'm sure most are familiar with Toyan engines by now. They started out with some single and dual cylinder 4 stroke water and air cooled engines that were pretty cool, though significantly underpowered in comparison to their two stroke brethren. They did however make gas and nitro versions, which for some might be interesting (I'd certainly prefer running on nitro/methanol).
Then they came out with a V4, and an inline 4 that were a bit more powerful and a bit more intriguing. Still probably no match for a good nitro 2 stroke.
Recently they came out with a 1/10th scale V8 (though it's really more like a 1/6 or 1/7 scale). This little bugger is about the size of your fist or so, and packs a "claimed" 4.5 hp at 11k rpm with a max of 12.5k rpm. That kind of perked my ears up a little. Then they offered a roots supercharger! Ok, now they have my attention. How big is this thing really? (It's 4.7 inches long, and a little under 5lbs).
So what would this look like sitting in a 13 inch wheelbase street eliminator car (which while called 1/10, is really 1/8)? I mocked it up for fun.
Hey, that's not horrendously proportioned. Maybe a little cartoony, Rat Fink style. Would it fit in a Slash based chassis? What other parts would make this work? I started making measurements.
The first thing would be to see where the engine would sit (it would work if it were up against the front shock tower, bringing the rear of the engine to the middle of the gas tank hole. The steering block would be tight, but ok, but the servo would have to be relocated (probably flipped around and further out).
I would use a Revo 2 speed transmission, which would probably be able to be centered given that the spur is up top, and off to the side.
Then I'd use a TMaxx rear diff (one piece aluminum from Fast Lane Machine or similar)
A short (1.5-2 inch) CVD from the trans to the diff would finish that off.
Given the known fact that the peak RPM is 1/3 of a good nitro 2 stroke, it would require a very small spur, and a very large clutch bell, probably close to a 1:1 ratio. Again, these are doable items.
What's intriguing to me is that this would be really the most scale form of RC drag racing ever. I wonder, given that it's a four stroke, how much energy density could you achieve with the blower, and say nitrous oxide? The car would certainly be heavier, probably 8-9 lbs, but how much real power could be achieved? Will companies start making more radical camshafts? Will 3rd party guys with machine skills do it? (Already I've seen a guy who's made turbos, blowers, and other things for these engines). Will you be able to go full Ryan Martin and hook up a laptop to program the tunes?
Like I said, I don't think I'd take this on, but I like the idea that its possible. Obviously you'd only be able to run this in a "run what you brung" class, because damn few people are going to spend the money it would cost to build cars like this, but man if they ever get those engines down to say 400 or 500 dollars...
I'm sure most are familiar with Toyan engines by now. They started out with some single and dual cylinder 4 stroke water and air cooled engines that were pretty cool, though significantly underpowered in comparison to their two stroke brethren. They did however make gas and nitro versions, which for some might be interesting (I'd certainly prefer running on nitro/methanol).
Then they came out with a V4, and an inline 4 that were a bit more powerful and a bit more intriguing. Still probably no match for a good nitro 2 stroke.
Recently they came out with a 1/10th scale V8 (though it's really more like a 1/6 or 1/7 scale). This little bugger is about the size of your fist or so, and packs a "claimed" 4.5 hp at 11k rpm with a max of 12.5k rpm. That kind of perked my ears up a little. Then they offered a roots supercharger! Ok, now they have my attention. How big is this thing really? (It's 4.7 inches long, and a little under 5lbs).
So what would this look like sitting in a 13 inch wheelbase street eliminator car (which while called 1/10, is really 1/8)? I mocked it up for fun.
Hey, that's not horrendously proportioned. Maybe a little cartoony, Rat Fink style. Would it fit in a Slash based chassis? What other parts would make this work? I started making measurements.
The first thing would be to see where the engine would sit (it would work if it were up against the front shock tower, bringing the rear of the engine to the middle of the gas tank hole. The steering block would be tight, but ok, but the servo would have to be relocated (probably flipped around and further out).
I would use a Revo 2 speed transmission, which would probably be able to be centered given that the spur is up top, and off to the side.
Then I'd use a TMaxx rear diff (one piece aluminum from Fast Lane Machine or similar)
A short (1.5-2 inch) CVD from the trans to the diff would finish that off.
Given the known fact that the peak RPM is 1/3 of a good nitro 2 stroke, it would require a very small spur, and a very large clutch bell, probably close to a 1:1 ratio. Again, these are doable items.
What's intriguing to me is that this would be really the most scale form of RC drag racing ever. I wonder, given that it's a four stroke, how much energy density could you achieve with the blower, and say nitrous oxide? The car would certainly be heavier, probably 8-9 lbs, but how much real power could be achieved? Will companies start making more radical camshafts? Will 3rd party guys with machine skills do it? (Already I've seen a guy who's made turbos, blowers, and other things for these engines). Will you be able to go full Ryan Martin and hook up a laptop to program the tunes?
Like I said, I don't think I'd take this on, but I like the idea that its possible. Obviously you'd only be able to run this in a "run what you brung" class, because damn few people are going to spend the money it would cost to build cars like this, but man if they ever get those engines down to say 400 or 500 dollars...
Man...manual 3 speed tranny and all!?! How much fun would drag racing that beast be???
