Quote:
Ok - time to revisit this thread
Sorry I missed your post until now.
Quote:
I'm now gathering the parts for the nitrous system. I did buy a used set of X-10s. I know that is not the ideal solution and I am assuming some risk and responsibility for doing so.
As long as they've not been tampered with they should be fine as they NEVER wear out.
Quote:
Looking for some advise on the best way to set up the system. The ECU I am using is a plug-and-play ECU based on microsquirt architecture. I have a little over a year experience with it running on the street. It has the ability to manage the fuel for up to two stages of dry nitrous - but no progressive control.
Progressive is much better than staged.
Quote:
The scheme it uses is to specify the added pulse width at a low RPM setting and the added pulse width at a high RPM setting. Theoretically, if your low RPM setting in 5000 RPM and the high was 10000 RPM, the added pulse width for a fixed hit would be half at 10000 RPm as for 5000 RPM - since the pulses would be occurring twice as often.
For a fixed nitrous delivery you need a FIXED increase in fuel, regardless of RPM. Just because the injector operates twice as often does NOT mean it is delivering twice as much fuel and is in fact delivering less as each operation is for each cycle, so needs to be the same. The only proviso for this is that there is less time available to suck in a charge of nitrous, so you will get progressively less in as the rpm increases but you need to MATCH THAT, NOT HOPE that its going to be correct.
Quote:
My concern with this is attempting to progress the nitrous. My initial thoughts are to plan for 20, 40, 60, 80 and maybe 100 shots -- working up a bit at a time to see how much power the available traction will hold with my setup.
If it doesn't have the capacity to get a fixed delivery correct, it will at best be hit and miss used for progressive delivery.
Quote:
I have thought of going with an RPM based nitrous progression - that could allow some tailoring of the fuel curve. The downfall of that would be the tendancy to add more power once tire spin begins.
Time based is the best option, which is why ALL controllers use that method.
Quote:
Or am I a lot better off with a wet system and pulsing the fuel along wih the nitrous?
Yes you most certainly are.