Hi there...
I will install a NOS System in my car and I was thinking on using a computer to regulate at which RPMs inject the NOS... so I was thinking on something like this...
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150326395560&sspagename=STRK%3AMEBIDX%3AIT&viewitem=...