1990 Mx5 1.6 with M45 supercharger, 550cc injectors (Denso case but modified to 550cc), MSPNP9093, IAT.
I've been running Megasquirt for two years. I added the IAT, the injectors and supercharger one by one.
The last couple of days I've been reading a lot of posts on this forum and the Megasquirt forum. And boy have I learned..
First of all, I didn't think the hi-res code would work on my ms1. But from what I've read, it will, no problem.
Second, the hi-res code gives me bigger tables. from 8x8 to 12x12. Sweet! And even better, it's able to be much more precise with the injectors!
So.. Correct me if I'm wrong here.
I can download and install the hr_10g or the hr_11d firmware on my mspnp9093
. Both work, but the hr_11d has some changes that won't affect my car anyway from what I understand. But I guess newer is "better" ?
I should install a 100nF (0.1µF) ceramic capacitor on it. Described in the manual and in threads here on the forum (How to make and install your own Diy MegaSquirt
I'm guessing a max 100V ceramic capacitor will the trick? I'll add heat-shrink to it so that it can't short out on anything.
The only "negative" thing I can find about hi-res firmware is that it doesn't support low ohm / impedance injectors. Since I installed mine without having to add any resistors, I'm pretty sure they're high impedance.
Since I'm running a puny supercharger, I'll see max 8 psi of pressure. That means max 156 ish kpa.
I'll need to re-scale my tables for max 160 kpa and for 12x12. What kind of increments should I use for kpa and RPM?
Any other mods or upgrades I should do with the ms while I'm at it? I've read about " A better Spark Out circuit
". I did have problem with it popping, but it seems to have disappeared after a little tuning.
A variable TPS, not just on / off as it is now ?