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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: About MegaSquirt Tue, 25 February 2003 02:16 hey again, bad points? the lack of fuel map resolution. this was done to simplify the code, as it is written in assembler with an 8 bit register (iirc). but there are two banks of injectors, and you can fire them simultaneously, or alternately, and you can have any number of injection events per engine cycle. most ppl seem to use alternating with either 1 or 2 squirts per cycle. one of the audi turbo guys has (iircm a bit fuzzy on the specs) 4 injectors of about 500cc/min on one bank/table, and then one or two 'big' injectors (900ccish??) on the other bank/table... the good side of this is that using 8bit for the table, you can use PWM (pulse width modulation) to run low impedance injectors, and you can adjust the initial pulse, the hold current and the time for each etc.. there are other versions of code where you can run dual fuel tables.... this means you can have a second set of injectors running on a completely differetn map. or you could have water injection running on that map, or nitrous if you had a variable nitrous injection system. there is also a 'high resolution code' that allows you to run large injrctors with small pulsewidths, around the 1ms mark. so it depends on your needs. the good/really good point is that it is universal in application. you can program it to use any sensors you want (provided you can measure/get the data for it), and can run in either open loop MAP, closed loop MAP or Alpha-N mode (Throttle position only) the other good things are that it is realtively cheap, fully progammable with a very easy to use interface (even on a p100 laptop!) and that there are HUNDREDS of other ppl who also want to make it work and are willing to help you out... kinda like this club. BTW, i have personally seen the Megasquirt working on a sandrail in the US that had a toyota 22RE with an Eaton M90 supercharger running something like 14 or 16psi... we played around with the idle pulsewidths and the O2 feedback to improve idle, and you can see and hear how the changes affect it. the video of the rail going over a table top, maybe 4 metres above it, was awesome to see too!!!) Cya, Stewart [Report message to a moderator]

	Subject	Poster	Date
	About MegaSquirt	Jayem	Fri, 21 February 2003 13:45
	Re: About MegaSquirt	mrshin	Fri, 21 February 2003 13:50
	Re: About MegaSquirt	mrshin	Fri, 21 February 2003 14:00
	Re: About MegaSquirt	M.W.P.	Sat, 22 February 2003 11:16
	Re: About MegaSquirt	mr_mcfarlane	Sat, 22 February 2003 14:38
	Re: About MegaSquirt	Jayem	Sun, 23 February 2003 03:07
	Re: About MegaSquirt	SPEEDCORE	Fri, 21 February 2003 17:19
	Re: About MegaSquirt	Bugman	Sat, 22 February 2003 01:37
	Re: About MegaSquirt	Youngy	Sat, 22 February 2003 01:44
	Re: About MegaSquirt	SPEEDCORE	Sat, 22 February 2003 03:54
	Re: About MegaSquirt	mrshin	Sat, 22 February 2003 11:37
	Re: About MegaSquirt	Pheonix	Sun, 23 February 2003 05:11
	Re: About MegaSquirt	IRA11Y	Sun, 23 February 2003 07:24
	Re: About MegaSquirt	M.W.P.	Sun, 23 February 2003 13:13
	Re: About MegaSquirt	mr_mcfarlane	Sun, 23 February 2003 18:53
	Re: About MegaSquirt	Jayem	Sun, 23 February 2003 22:00
	Re: About MegaSquirt	mr_mcfarlane	Sun, 23 February 2003 22:07
	Re: About MegaSquirt	Grega	Sun, 23 February 2003 22:51
	Re: About MegaSquirt	Pheonix	Mon, 24 February 2003 02:34
	Re: About MegaSquirt	M.W.P.	Mon, 24 February 2003 03:05
	Re: About MegaSquirt	mr_mcfarlane	Mon, 24 February 2003 03:13
	Re: About MegaSquirt	thechuckster	Mon, 24 February 2003 12:31
	Re: About MegaSquirt	oldcorollas	Tue, 25 February 2003 01:57
	Re: About MegaSquirt	oldcorollas	Tue, 25 February 2003 02:16
	Re: About MegaSquirt	Jayem	Tue, 25 February 2003 14:59

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