DIY_EFI Digest Thursday, August 5 1999 Volume 04 : Number 451 In this issue: Injector flow rates needed re #447 starting cranking problems RE: purchase efi332 boards External Injection Fuel Pump See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Thu, 5 Aug 1999 07:49:44 -0400 From: "Charles Brooks" Subject: Injector flow rates needed Richard, check here for injector info. It's a list of injectors from several different Mfr.'s There are flow rates, applications, and some usefull equations. ftp://efi332.eng.ohio-state.edu/incoming/Injector.rtf Charles Brooks - ---------- Original Message ---------------------------------- From: DIY_EFI-Digest-Owner@xxx.edu (DIY_EFI Digest) Reply-To: diy_efi@xxx.edu Date: Thu, 5 Aug 1999 05:00:00 -0400 Date: Thu, 05 Aug 1999 15:15:48 +1000 From: Richard Wakeling Subject: Injector flow rates needed. Hi All, Does anyone know the flow rate of these injectors? 1) 0 280 150 973 Its impedence is 12 ohms It is out of the VT Holden Commodore V8 Sequential engine. 2) 0 280 150 775 3) 0 280 150 960 Thanks in advance. Cheers Richard ------------------------------ Date: Thu, 05 Aug 1999 21:57:56 +1000 From: leigh Subject: re #447 starting cranking problems Hi, Iam a new subscriber to DIY_EFI and have read with great interest the last couple of issues. First off internal combustion petrol engines use atomised fuel not vapour. Vapour is whats left in the tank when you run out of petrol. The terminoligy of COLD/HOT starts is techincally Incorrect but most people no that COLD is ambiant temp which can change drastically from locations and HOT is operting temp ie aprox 85 to 100 C on late model high pressure cooling systems. I think we get blinded by technology to ofter and forget the basics. As far as start / crank injection timing goes you need to set paramters for varied ambiant & coolant temps. Most factory systems fire one block of all injectors on the first crank pulse then consective pulses while engine speed is below a predeturmand leval. This pulse can be changed large amounts ie between 4ms to 20 + ms depending on air & coolant temprature, cold, warm or hot start. On a rpm signal above the predturmand leval they then switch to idle run fuel blocks and muck lower pulse rates. I have had recent experiance with a engine that had hot start problemsdue to the ecu not returning to start mode and only pulsing injectors for 5 ms, idle volume, when the fuel hit the valve head it vapourized and would not start. The pulse timing for hot start should have been around 15 ms. Iam still waiting for the injectors flow rate to work out the fuel volume per cyliner size to get a base start line. regards Leigh Turner ------------------------------ Date: Thu, 5 Aug 1999 09:43:16 -0700 From: "Al Lipper" Subject: RE: purchase efi332 boards To avoid further confusion, here's the deal with the ECU6 boards. I have three of them left for sale. They cost $37 each plus shipping. These are bare printed circuit boards (no components). I will sell them to the first three people who contact me to arrange for shipping and payment. Once they are gone, there are no more (ECU7 boards may be available in a few months, but no guarantees). I am not at all involved with the EFI332 project - you must contact the appropriate people for buying those parts. I hope this clears things up. Al efi@xxx.org > -----Original Message----- > From: leigh [mailto:lee@xxx.au] > Sent: Thursday, August 05, 1999 4:58 AM > To: efi@xxx.org > Subject: purchase efi332 boards > > > Hello from Australia, i have only recently found your web site & digest. I > wish to purchase the following if availible > 2 CPU 6 boards > 2 BDM boards > 2 I/O boards > 4 DRIVER boards. > I tried to obtain prices & status from the GROUP BUY page > but could not access it.If you could let me know by how > much and the best way to send you the money. > With Thanks > LEIGH TURNER > lee@xxx.au > ------------------------------ Date: Thu, 5 Aug 1999 09:53:51 -0700 From: "John Dammeyer" Subject: External Injection Fuel Pump Hi, Does anyone have a source for externally mounted fuel pumps for injection systems. Can't put the pump in the tank. We need only about 40PSI. Thanks, John ------------------------------ End of DIY_EFI Digest V4 #451 ***************************** 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".