Ya not exactly lol my castle 1717 1650kv on 8s doesn't even break a sweat at 145mph, the motor is maybe 95-100°. my TP 4060 2620kv on 4s hits 120°. Not sure what bigger cap pack than 8s there is not to mention again running 4s with 8s cap pack and have the bad ripple with the TP. The 40mm cans don't produce near enough torque needed not to mention TP customer service is non existent. Only motor from TP I'd consider is one of the 56mm cans in like ≈1400kv. No offense but I talk with some of the best in the world for advice and nothing your suggesting has been mentioned or suggested. I appreciate the suggestions but I think this is a bit out of your wheel house. The new 1721 2400kv motor from castle is going to change speed running and push speeds up quite a bit considering its very new and there's already been a 190mph pass made with it after only a few weeks of running it.
Yeah, you're right, I've never done speed runs with a rig as big as what you're using so I can only draw on my knowledge of electronics, 1/10 scale speed runs, and RCs in general but its not exactly rocket science. Put the biggest kV motor in it ya can with the shortest gearing and best battery you can. Other than that all you have to do is tune the car so it stays on the ground and drives straight. I mean I dont want to over simplify it cuz tuning the kit requires a lot of work and trial and error but the electronics and gearing portion of it isnt hard to figure out. Is there more to it than that or something I'm not taking in to account?
Not sure why 40mm cans are too small, Thats what the infraction and felony both come with and those kits are the same basic size and scale as the limitless. Granted they will get hot faster than 46mm or 56mm cans but its not like you can't do a handful of runs with it and then let it cool down. Unless your goal is to just keep repeatedly doing speed runs for a period of time because its what you like then thats different than just chasing a PB number I suppose.
I'm really not sure how you're getting a ton of ripple using an 8S cap pack although "8S cap pack" is a very vague term cuz all that really means is that the capacitors in the pack are able to handle 8S voltage but you can buy a 35V 250mF capacitor and call it an 8S cap pack but it wouldnt have enough capacitance to be effective. The IR of the caps plays a big part in how they perform too so I wonder if your 8S cap pack is insufficient in either of those ways and maybe thats why you're having that issue? IDK, just wondering.
When you say you get "bad ripple", what percentage of ripple are you getting? Anything up to about 9% is considered an acceptable level of ripple. I should have said bigger and/or better cap pack I suppose. You can get them all the way up to 12S and you can build one really easy thats higher than that if one were so inclined. Plus not all cap packs are created equal in terms of IR. Just like lipos, caps come in all manner of different quality levels.
120F isnt that hot for a motor. Why is that an issue? When I said that theyre all going to get hot, I meant they would all get hot if your pushing for higher and higher speeds. If you're doing that then at some point your motor (whatever size it is) is going to start getting hot. If your 1717 is only hitting 100F why are you not gearing shorter to get higher speeds? That motor isnt overheating until 170-180F. Just curious
The new 1721 motor will be an interesting one. It will be interesting to see how they do and how popular they become.
Sorry if this all sounds argumentative. Its not meant to be, I'm just genuinely curious.