DIY_EFI Digest Monday, October 4 1999 Volume 04 : Number 559 In this issue: Fuel injecting a 4.3 SGS driver See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Sun, 03 Oct 1999 16:30:43 -0400 From: Darren Floen Subject: Fuel injecting a 4.3 Hi,i'm new to the list.I'm fairly inexperienced with electronic FI,but i'd like to install a throttle body setup on a 1986 4.3 chevy engine.I'm swapping this engine into my 85 Toyota truck.What type of setup would be best?I was thinking of a Holley Pro-jection setup,but I have heard some bad things about them.I was thinking of using the 2Di,closed loop setup. Could i use the injection setup off say a 3.8 liter buick?Would it be able to compensate for the larger engine? Thanks very much for any replies,and please cc them to me at dfloen@xxx.net Darren ------------------------------ Date: Mon, 04 Oct 1999 10:04:36 +0200 From: Nic van der Walt Subject: SGS driver >Can anybody help me identify a 21 pin Multiwatt package Injector driver chip >in a Motronic ECU ? > >I think it was made by ST, formerly known as SGS. In all likelyhood it is just a dual or quad half bridge driver. I have used them frequently in coil drivers. They demand an excellent protection diode across the coil, otherwise they will fail quickly and spectacularly. If the device is malfunctioning replace all the diodes around it with higher spec devices. When used with the correct clamping diode these components are great, but expensive. Some of the ST components have current monitoring, should work great for injector checking. Regards, Nic van der Walt - ------------------------------------------------------------ Cellpoint Systems SA http://www.cellpt.co.za GSM Technology for Positioning and Telematics - ------------------------------------------------------------ ------------------------------ End of DIY_EFI Digest V4 #559 ***************************** 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".