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Would need to be more like 1 to 6 or 1 to 8 ratio I think. So that increase the load a lot. I expect it will suffer from inertia, they look quite large, so they wont spin up quickly and being geared 1 to 6 or 8 will be slow, basically they will be laggy. Think of it like an old 10 speed push...

in NZ, my certifier said something similar, I can't remember what volts he said to be under because when I said about 50v he said that was ok. Plus a whole lot of sensible stuff about how to mount the batteries. which was mostly what I was planning anyway. I'll be keeping him in the loop as I...

Like an accusump? IT wont boost oil pressure, but it will keep the pressure up for a short time of the oil intake is gettign a bit of air for example on a sweeping curve where the oil flows to one side of the sump https://silvesterv8.co.nz/products/canton-accusump-3-quart

Its obvious when you look at a positive displacement setup, big long heavy rotating hunks of metal that are designed to stop air flowing through them, vs a centrifugal that allows air to flow past the compressor when it isn't spinning. The compressor wheel is obviously lighter, easier to get...

wouldn't they be very restrictive when not spinning? The other thing that comes to my mind is inertia, how much weight is in the rollers that the motor needs to get moving from 0 rpm to 15k in a short span of time as compared to a centrifugal compressor?

I think this breakthrough (if real) is about the cost per kwh, 90% cheaper than previous gen technology

The video below talks about a break though in sodium ion technology. They claim 10,000 cycles and a cost of $10 per kwh. Although the the talking head in the video is doubtful of the claims.

Yes, it makes sense that the PSI would drop as RPMs rise. Unless the compressor is increasing speed as well, but then having as much boost as you can at any point is better than reducing it in the middle just to make the top look better. Nice to see it moving forward

mine is the same

I don't know if you have seen this thread? https://www.electrifiedboost.com/threads/raspberry-p-s-i.163/ Towards the bottom of the page they provide some STL files.

i am getting bit chatter, its too flimsy, i am experimenting with slower feed speeds and less depth per pass. It won't hurt me if it takes 3 times as long to cut. But i might look at getting some t-slot stuff to try and stiffen up the gantry on it

I too have been experimenting with FreeCad and a small cheap and nasty CNC machine that really isn't up to the task. They claimed it could handle mild steel so I figured that like all sales pitches that mild steel would be just beyond it's abilities, so aluminum should be fine. 🤣 But it is...

Despite no cats it could still be something near the exhaust getting toasty, extra air, extra fuel = extra heat You could try routing some air to the alternator, some 50mm flexible hose to a high pressure point behind the grill, like a brake cooling duct and dump the output in the alternator...

I can't remember what data it wanted, but weight was a big part of it, which was a guess, and like you say accelerating the wheels on a dyno isn't the same as accelerating a car by turning the wheels

Yea, I played with an app Called Virtual dyno, https://barnhill.bitbucket.io/ a few years ago, and UpRev, a a tool for nissan ecus, I captured data on a run on a dyno, but couldn't get it anywhere near close to the what the dyno run chart said using the exact data from the run.

I don't know why there is so much fuss about crank power, it's always a 'best guess' and probably over inflated but it seems in the UK and US they talk about it a lot, many of the charts seen claim engine power some how 🤔 At the end of the day power at the wheels is what is doing all the work

Rotaries have no fear of RPM 🤣 Is that measured at the wheels? I assume so.

What do yuo mean by twisted in its thread? Did it back itself off and come lose or did the shaft twist under the screw like it wasn't there?

Thats a good point I hadn't considered. When I brought my HW setup I discovered an acquaintance has them in his RC trucks

the old classic first mod, remove the factory cold air intake and replace it with performance harming hot air intake