OK, I've been reading Meuller's crap too long, Just little bit of boost Options

[DNHunt]

How about a small electric compressor directly in the intake that runs constantly to provide a small amount of boost maxing out at say 4 psi. Boost is regulated by a stepper motor controlling a very small wastegate or very large idle air control valve. The stepper is contolled by the ECU using input from the throttle position sensor. Not much compression of the air and it could come from a cold air intake so no intercooler. It's pretty simple electronics. Would it work and is it worth the trouble?

Fire away (IMG:http://www.914world.com/bbs2/html/emoticons/ar15.gif)

Dave

[bondo]

QUOTE (lapuwali @ Mar 15 2006, 02:11 PM)

QUOTE (DNHunt @ Mar 15 2006, 12:45 PM) QUOTE A single 60Ah battery would make 0.7kW for one hour, or 8.8kW for about 5 seconds. Even with a dumb idea I learn something. Dave Simple arthimetic, Dave. So simple I screwed it up! 60 amp hours is roughly the usual rating on a car battery. Watts = amps * volts. 60A * 12v = 700W for one hour, or 42kW for one minute, or 2.5MW for one second (yow!). 42kW/8.8kW = 4.77 MINUTES (not seconds, my mistake). So, you could get, with one car battery, enough boost to last you for several runs. There's enough energy in one car battery to give 300hp for 11 seconds, assuming you could actually get that energy out without melting everything.

It's more compliacted than that.. 60 Ah is usually based on the 20 hour rate. (20 hours to drain it, at whatever constant current is needed to do that) Thanks to the Peukert effect, the faster you pull energy from the battery, the less you will get. If you pull current at a rate that will use 60 Ah in about 5 minutes, you'll find your battery dead much sooner than that. An AGM bettery will suffer from this less than a "normal" battery, but it still happens and is very significant.