DIY_EFI Digest Sunday, 1 June 1997 Volume 02 : Number 185 In this issue: RE: GN "bashing" o2 sensor fooler- coming soon Who makes the CSP3000 67F687 by Silicon Systems? See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Frederic Breitwieser Date: Sat, 31 May 1997 12:19:24 -0400 Subject: RE: GN "bashing" Hey Todd, > But seeing is believing; why don't you drive that air conditioned, > supercharged 350 street car on over? I know a few turbo Regal "ducks" > who'd be more than happy to quack for ya' Fred :-) Before you label me as a GM-Athiest, I have to say certain things. I happen to like the GN/GNX, and the figures you quote are impressive for a factory vehicle. Its been my understanding that the stock GN series has been able to out accelerate stock 'vettes, though this is what I've heard and not based on facts that I have seen. Nothing wrong with the car. Never said there was. Where my "looks like a duck, must be a duck" thing came from is I have a friend who made a GN mockoff using a same year Buick Regal station wagon, removed all four doors, got driver and passenger doors from a 2-door same year Regal, and welded the rest of the wagon into a pickup truck, painted it GN black, and labeled it accordinly and used the appropriate wheels. The engine was bored & stroked, and looked cute and performed impressively. And yes, it blew away Monte Carlo SS and GN/GNX's left and right. However, we are not comparing apple with apples here... the GN, with minor modifications such as cam changing and larger turbos is basically a street legal vehicle, as produced by GM. My friend's GN "El Camino" ::looked:: like something GM would have produced had they done so on the outside, but it was not street legal in any sense of the word. No emmissions, rear spool, headers and cherry-bomb mufflers (no cats). The interior was pretty much stock, minus the rear seats, but it had leather, air conditioning which worked, and all the usual creature comforts. A stroked 350 (that's a 383, right?) dual 4 bbl holleys and the usual drag racing engine stuff. This was a long time ago. Hence, my "duck" comments, which I guess was a one-person inside joke since my pal who made the car isn't on this list. The GN is a kewl car, and even though I like the car, its not something I would buy. Straight acceleration is great and impressive, but cornering over the years have become more important to me as I drift away from NHRA stuff and more into IMSA stuff. Not necessarily a logical progression, but its the one I'm making over time for some reason :) Thanks for the comments Todd :) Frederic Breitwieser Homebrew Automotive Mailing List Website: http://members.aol.com/fjb203/index.htm Email: frederic.breitwieser@xxx.com Bridgeport, Connecticut ------------------------------ From: Seth Allen Date: Sat, 31 May 1997 22:30:49 -0700 (PDT) Subject: o2 sensor fooler- coming soon To those of you who are interested, my fried will convert the schematic for the o2 sensor fooler into a .gif file format. It is a relatively universal format. I will mail it to people individually, after I get the schematic. Unless a person has a ftp site, then i could mail it and they could put it on their ftp site. I don't have a web page or a ftp directory open to the public, so I can't do this. But I am waiting for a volunteer. In the meantime, I'll be waiting for the electronic notes form my friend. Incidently, with this circuit and the adaptive dodge neon ecu, the neon passed the ULEV emissions standard on CNG with virtually no modifications, other than a 2nd catalyst. So it can't be too far off from correct. Seth ------------------------------ From: Robert Levin Date: Sun, 1 Jun 1997 14:48:39 +0900 (JST) Subject: Who makes the CSP3000 >From the DIY reference list at http://www.dcc.edu/vettenet/efi_ref.txt: >> CSP3000 -- Signal processor for automotive applications The Car Signal Processor (CSP3000) is a signal processor designed for use in automotive applications. 24 analog inputs and 8 PWM outputs represent the interfaces with the analog world. The digital, 12 bits wide I/O port and two serial bus interfaces permit the exchange of digital data within the application or between processors. FEATURES OF THE CSP: - - 12 Bit RISC processor (FP) - - 256 words of internal RAM (12 bit) - - 2048 works of internal ROM (20 bit) - - internal clock generator - - 12 Bidirectional IO lines - - 2 serial ports - - up to 24 analog inputs - - 8 PWM outputs - - up to 24 digital inputs - - all digital inputs with hysteresis - - 2 independant RESET pins for FP and PWM system - - PLCC 68 package - - EMU version available in 132 pin LLCC package >> Does anybody know who makes it? thanks, Robert Levin ------------------------------ From: Robert Levin Date: Sun, 1 Jun 1997 15:11:52 +0900 (JST) Subject: 67F687 by Silicon Systems? The DIY reference list at http://www.dcc.edu/vettenet/efi_ref.txt says the 67F687 MSIC device is made by Silicon Systems in Tustin, CA. But the Silicon Systems web page at http://www.ssi1.com shows only parts used in data storage devices, such as hard disks. Is the 67F687, or similar part, still available? >From the reference list: >67F687 > The 67F687 is a high performance MSICs ( Mixed Signal Integrated Circuit ) >designed to work with a microprocessor in an engine management system. Using two >sensor inputs (crank and cam), the 67F687 tracks engine position through one or >two complete revolutions with a resolution of 0.25 degrees. Designed to be >flexible, the 67F687 will accept a variety of sensor types and pulse patterns. >It generates ignition and injection output pulses based on position and time >parameters supplied by the host microprocessor, relieving it of many of the real >time interrupt routines associated with these tasks. These outputs can directly >drive power devices to actuate automotive ignition coils and fuel injectors. A >sense input from each device allows individual diagnostics, short circuit >protection and ignition coil current limiting. A timer, which measures coil >charge time at the ignition sense inputs, enhances closed loop dwell control. >Communication with a host microprocessor is through a parallel data and address >bus. A general purpose parallel I/O port offers level sensitive input and output >capability, in addition to edge detect inputs and PWM outputs. >Silicon Systems >Automotive Products >14351 Myford Road >Tustin, CA 92680 USA >Attn: Tony Anderson thanks, Robert Levin ------------------------------ End of DIY_EFI Digest V2 #185 ***************************** 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".