Search results

IMO you need to get tuning software and tune it for boost. Trying to do it mickey mouse style might be ok for 1-2psi but it will severely limit the potential of your system once you start raising the boost.

Yeah ... motor sits at around 48C under there doing nothing.

Just came back from 'Mad Mike's Summerbash'. Had three one hour sessions on track . These sessions are not full blown race pace. Generally it's more about just cruising around the track until you reach a certain part of the track where it becomes a full on roll race for all and sundry. This is...

Had zero issues with mine .... highest power I've seen out of battery is 18.5Kw so far at 25000ish rpm - I think there is more left in it.

Wow ...great video and explanation! For me I really have to stick with some water though, due to safety concerns, plus it really does help my rotary stay nice and clean (preventing compression loss) internally. Maybe ...for the dyno though......lol

just thinking aloud here ... this is not from experience. Would it be fair to say that while water does a better job of reducing knock on its own, methanol allows more liquid to be injected into the combustion chamber (without drowning the engine) which in turn allows more power to be made...

I'm using my max4 at 54.5V and it still works fine - for the last 6 months or so anyway. Any higher and the my charger trips out the ESC regularly and you can tell it doesn't like it as the audible 'ready' tones sound wonky. Using a 21S battery which means each cell is at 2.6V which is perfect...

Might be worth me trying it with dual motors seeing as It's working so far. I figure the P2 is capable of 3-4 x more than what I've thrown at it so far and it was designed with just a belt drive in mind.

Thanks for the reply. Interestingly, I'm not seeing my belt get hot at all at around 18KW peak and 27000rpm. Could be a few factors in play .... The water cooled compressor housing is also cooling the shaft/drive pulley, plus, I've got quite a conservative 'punch' setting on the ESC.

Hmmmmmmm .....I wonder ......

Might pay to get those gears closer in to the motor end bearing if at all possible ... shaft flex/bearing wear might become an issue. Use countersunk set screws perhaps? Otherwise .... I'm seriously thinking about doing something similar for my build.

Update : Having to bring the eSC in quite late due to surge as mentioned above was getting to me. Had been thinking about variable speed control but the idea of tuning an Aduino or similar doesn't appeal due to my lack of computer skills. So, I had a spare speed control board (they sent me an...

Yep

It is the same guy, lol . He mentioned talking to someone else and I figured it must be you!

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...