DIY_EFI Digest Sunday, January 16 2000 Volume 05 : Number 023 In this issue: MSD fuel injection parts source for larger Viper injectors? Spark timing See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Sat, 15 Jan 2000 12:09:37 -0800 (PST) From: Carter Shore Subject: MSD fuel injection parts Help, I've searched all over the net for MSD fuel injection site, all I can get is the MSD Ignition site, and can't find any FI stuff there. Can someone please email me the URL? (esearch challenged) Carter clshore@xxx.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com ------------------------------ Date: Sat, 15 Jan 2000 16:48:11 -0500 From: "Jason R. Haines" Subject: source for larger Viper injectors? Does anyone know of a source for larger injectors for the Dodge Viper? They use "bottom feed" Siemens injectors (high impedance) and I can't seem to find larger injectors anywhere. The 1996 and newer GTS (1997 and newer RT10) cars seem to have larger injectors than the older cars did but I need bigger still. Thanks, Jason ------------------------------ Date: Sat, 15 Jan 2000 18:19:33 +1100 From: Andy Wyatt Subject: Spark timing G'day all, I'm fairly new to this news group, I've been lurking for about a week, and I've got a question about ECUs in general. I'm currently building an EFI computer for my 83 Pusar Exa turbo, and have the fuel running great, currently I'm working on spark. Question is: How do most ECUs for turbo cars handle spark timing? My car does not have a MAP sensor as standard, so it could only determine by airflow/rpm. It also doesn't have a throttle position sensor, just a switch which closes when the throttle is fully closed. Do they just have a lookup table (map) as for fuel? Or do they have a certain amount of base timing, then an algorithm to determine centrifugal advance and vacuum advance/boost retard? There is nothing in the Nissan manual about it; all it says is that it runs 15 degrees advance at idle (pretty high, I thought). Would it be less during cranking? Anyone ever mapped ignition timing for a 1.5L turbo engine? Also, is there any advantage of sequential injection over group fire other than the increased atomisation you'd expect from injecting the fuel while the air is flowing through the inlet port? I heard someone tried swapping the injector leads from a sequential injection engine around so they were all wrong, and dynoed it to find there was no difference in power output, just in emissions at idle... Any help would be greatly appreciated Andy W :-D ------------------------------ End of DIY_EFI Digest V5 #23 **************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".