Interesting ... you've gone for high voltage and low capacity batteries whereas many others on here are doing the opposite (50V 40Ah) . I went down the middle with 50V 20Ah to keep my weight down (about the same as yours). One thing worth mentioning, here in NZ there are more stringent...
Thanks .... the mass airflow numbers actually line up perfectly with the compressor Flow map Alex recently updated too! Renesis flow in purple from 3500rpm to 8500
Also : I think I found the limiting values for the hobywing max 4 ESC . It trips out when over 300A for more than 4.5s (approx)...
After fitting a larger drive wheel and upping the voltage I started getting the issue seen below. Wild MAF sensor swings and an odd noise from under the bonnet. Spent the last day trouble shooting. Tried retiming the ssv valve, changing the water injection amount etc etc and was running out of...
It actually isn't important at all on my particular setup (13B rotary with P2). Below 7000rpms and full throttle there isn't enough restriction to make any difference in power. If you think about the system as a whole, the only restriction that makes a difference right up to that 7000rpm wide...
FWIW
Alex has tested his v8 to measure loss in performance with the P2 not running, and found it's significant. I've done similar tests on a smaller engine (13b rotary) and found the losses below 7000 rpm were inconsequential and only became an issue above that, somewhere around 25lbs/min of...
I've set up my system to kick in at a throttle position where the engine makes it's max NA power (this is way less than 100% open). I found that doing so any earlier just wastes electrical energy and runs you out of juice too soon. Hope that helps.
Also: just watched your you tube video .... my...
When I specd. everything I was only aiming for an extra 30-40whp and anticipating around 250A. But you know ..... 'moar powa baby' kicked in and It's actually at 360A and pretty much everything is on the small side. The batteries themselves are only 20Ah LTOs as I wanted to keep the weight down...
Put Bluey on the dyno today . Was hoping to break 300whp but didn't quite get there.
peak power of 282whp with impressive (for a rotary) midrange torque of 204lb/ft. Note to boost decline 6.5 down to 4psi at peak which was a little disappointing. Black trace on dyno was same car N/A so an...
It struck me watching that video that are lot of guys are missing another huge benefit in running the P2 SC. It barely restricts any flow to the engine at airflows below approx. 190g/s (25lbs/min). I have proven this on my engine, a13B rotary which consumes approx. same amount of air as a 3.3L...
Interesting conversation. Was talking to a friend over the weekend who races his rx8 in our local series. He had a faulty isolating switch recently and it resulted in almost every electrical component on the car being fried - who would have thought!
wkerstens, no I don't have the sensor cable...
Went for a really good long drive Sunday which included about 1/2 hour of twisties where I got a chance to test the system.
Some observations :
Battery : got down as far as 44v and found it still performed well without noticeable engine power drop. Temp got up to 40C which is quite acceptable...
That's one of the ways that you don't use it ....lol Dynos use a ramp rate which tries to match what actually happens on the road but is never exactly the same. So no - you can't do that.
I use Mazdaedit as a tuning tool and that has 'virtual dyno' as part of its software. I've also had numerous RX8s on a real dyno and have learned how to get the virtual dyno results within 5% of that. VD is fraught with traps for the unwary and you can easily get ridiculous results so It pays to...
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