|
On track cars, reliability is key, and the less components, the better (as long as everything is working within specs).
I'd go down to a single ignition relay that handles ignition signal to any other relays, as well as ECU/engine power. For a SR/RB/KA/etc 30A is plenty. For a LSx, 30A is not really enough, but works for most people.
No need for a starter relay, our starters only pull 10A or so inrush, and less than an amp maintained while cranking. I don't typically even use a separate starter fuse, unless I have a lot of other stuff on a maintained/constant 12v circuit, I just pull starter solenoid power from the ECU/engine ignition circuit since the engine pulls minimal current while cranking.
Typically I switch +12V instead of ground when using manual switches, and switch low (ground) when using ECU/standalone logic.
We can retail the components we use for most everything if people want to build stuff themselves, just send me a message with what you're looking for and I'll shoot you links to our website, or pics/pricing for stuff that's not on the site (still under construction).
|