Subject	Re: I feel that AVE is better
Posted by	BanzaiZX on November 02, 2009 at 4:12 AM
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In Reply To	I feel that AVE is better posted by Carlos Ramirez on November 01, 2009 at 08:04 PM
Message	I think AVG is only used for backward compatibility with ECUs tuned for the dual POP single MAF design, where the K value inside the ECU is doubled for doubling the MAF reading. But the MAF reading limit is not really on the output voltage the saturates at 5V, but on its precision. After a given ariflow the response of the MAF becomes "flat", it means there is a very small change in the output voltage for a big change in air flow, so its precision decreses. The Selin solves this problem by making each MAF reading half the air flow, keeping the instrument in its good precision range. But the output of the MAFs can still be summed with "ADD" function, for higher power, still being within the 5V range. Consider that with stock injector (K=288) a MAF reading at full 5V would roughly correspond to a TP value of some 230, whilst the stock map covers up to 96
Follow Ups	Selin install. Thanks Jim! - Tu 18:33:49 11/01/09 Nice! - DVDBURN (MD) 19:21:29 11/01/09 One thing I might mention too is... - DVDBURN (MD) 20:42:49 11/01/09 Re: One thing I might mention too is... - BanzaiZX 03:38:40 11/02/09 Correct, my unit uses a processor in this way - CaliguyPurdue (Selin Design) 11:38:28 11/02/09 Yes, the ECU converts the analog MAF input signal... - DVDBURN (MD) 12:03:01 11/02/09 This is a circuit based on analog operational amplifier. - Dark Diver 08:29:06 11/02/09 Re: This is a circuit based on analog operational amplifier. - BanzaiZX 09:34:44 11/02/09 That's exactly what I said : - Dark Diver 17:25:12 11/02/09 This circuit is incorrect. Details inside... - CaliguyPurdue (Selin Design) 11:34:11 11/02/09 Here's a picture of the bare boards... - CaliguyPurdue (Selin Design) 12:36:53 11/02/09 very impressive sir. Was wondering what was on the inside. - Tu 12:53:09 11/02/09 Sorry. I didn't mean to imply that your design was inferior - DVDBURN (MD) 14:40:39 11/02/09 Bye bye JIM Wolf hello JIM Selin :-) - ArubaDave 21:11:53 11/02/09 I agree and disagree with that : - Dark Diver 17:56:57 11/02/09 You are very correct. - DVDBURN (MD) 12:34:25 11/03/09 ok.. for the Add or Average, whats what - JustinSCZ32 19:35:46 11/01/09 I would assume add is for normal ECUs - collegeboy 20:00:20 11/01/09 I think its the exact opposite. - J-Mart 08:40:43 11/02/09 I am WRONG! I better go check my SAFC settings... - J-Mart 08:52:57 11/02/09 yup (n/m) - ali300zx 08:48:01 11/02/09 I feel that AVE is better - Carlos Ramirez 20:04:47 11/01/09 Not sure about the Selin, but when using an SAFC, the ADD - zgene4 20:23:34 11/01/09 Re: I feel that AVE is better - BanzaiZX 04:12:04 11/02/09 6 of one, half dozen of the other, just depends on EPROM (n/m) - BigTDogg (MA) 10:06:23 11/02/09 ADD is for a "single pop ECU" but you'll encounter the 500HP - Dark Diver 18:00:04 11/02/09 Nice! (n/m) - Musashi Sword 19:44:26 11/01/09 did you install the centre T-bolts before installing the - vorpalZ 21:05:10 11/01/09 I had both filters off for the final fit. I like easy. (n/m) - Tu 12:41:31 11/02/09 Thanks Tu! Great pictures and post.. - CaliguyPurdue (Selin Design) 11:42:59 11/02/09
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