DIY_EFI Digest Friday, September 3 1999 Volume 04 : Number 504 In this issue: Re: Correction/comments/V4 #501/Lotus/sizing Fw: Correction/comments/V4 #501/Lotus/sizing ALDL OBDII linking for sensor values See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 3 Sep 1999 17:01:58 +0800 From: "K V Jaeger" Subject: Re: Correction/comments/V4 #501/Lotus/sizing This is a multi-part message in MIME format. - ------=_NextPart_000_0015_01BEF62E.08BFAB20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jon, In amongst the fruit buns and iced coffee of morning tea, I neglected to = mention one very important part to the CFM calculation. I stated the = formula incorrectly. I was going to mention air requirements of 2 stroke = and 4 stroke (or even Mazda Rotary), but got side tracked. In the case of a 4 stroke engine, induction occurs on every other turn = of the engine and will therefore pump half the air previously stated.=20 What is possible on the two stroke engine, is something else again. = Orbital Engine Corporation of Western Australia have some good reading = matter on two stroke breathing. www.orbeng.com.au I have not checked = their site for some time. They also have a factory in Detroit, but I do = not know about a US website. =20 Sorry about the goose chase, Regards, K.T. =20 - ------=_NextPart_000_0015_01BEF62E.08BFAB20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Jon,

In amongst the fruit buns and iced = coffee of=20 morning tea, I neglected to mention one very important part to the CFM=20 calculation. I stated the formula incorrectly. I was going to mention = air=20 requirements of 2 stroke and 4 stroke (or even Mazda Rotary), but got = side=20 tracked.

In the case of a 4 stroke engine, = induction occurs=20 on every other turn of the engine and will therefore pump half the air=20 previously stated.

What is possible on the two stroke = engine, is=20 something else again. Orbital Engine Corporation of Western Australia = have some=20 good reading matter on two stroke breathing. www.orbeng.com.au I have not = checked their=20 site for some time. They also have a factory in Detroit, but I do not = know about=20 a US website.

Sorry about the goose = chase,

Regards,

K.T.

- ------=_NextPart_000_0015_01BEF62E.08BFAB20-- ------------------------------ Date: Fri, 3 Sep 1999 17:15:58 +0800 From: "K V Jaeger" Subject: Fw: Correction/comments/V4 #501/Lotus/sizing This is a multi-part message in MIME format. - ------=_NextPart_000_0035_01BEF62F.FD09DB50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable - ----- Original Message -----=20 From: K V Jaeger=20 To: DIY_EFI-Digest@xxx.edu=20 Cc: jon@xxx.com=20 Sent: Friday, September 03, 1999 5:01 PM Subject: Re: Correction/comments/V4 #501/Lotus/sizing Jon, Your private e-mail does not seem to be working. In amongst the fruit buns and iced coffee of morning tea, I neglected to = mention one very important part to the CFM calculation. I stated the = formula incorrectly. I was going to mention air requirements of 2 stroke = and 4 stroke (or even Mazda Rotary), but got side tracked. In the case of a 4 stroke engine, induction occurs on every other turn = of the engine and will therefore pump half the air previously stated.=20 What is possible on the two stroke engine, is something else again. = Orbital Engine Corporation of Western Australia have some good reading = matter on two stroke breathing. www.orbeng.com.au I have not checked = their site for some time. They also have a factory in Detroit, but I do = not know about a US website. =20 Sorry about the goose chase, Regards, K.T. =20 - ------=_NextPart_000_0035_01BEF62F.FD09DB50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

----- Original Message -----=20

From: K V=20 Jaeger

To: =20

Cc:

Sent: Friday, September 03, 1999 5:01 PM

Subject: Re: Correction/comments/V4 = #501/Lotus/sizing

Jon,

Your private e-mail does not seem to be = working.

In the case of a 4 stroke engine, = induction occurs=20 on every other turn of the engine and will therefore pump half the air=20 previously stated.

Sorry about the goose = chase,

Regards,

K.T.

- ------=_NextPart_000_0035_01BEF62F.FD09DB50-- ------------------------------ Date: Fri, 3 Sep 1999 13:00:01 EDT From: PHXSYS@xxx.com Subject: ALDL OBDII linking for sensor values Hi This is my first post. I have a project where I want to obtain sensor data directly to a microprocessor (PIC or Stamp). I want to get specific parameters: RPM, TPS,CTS,MAP/MAF, O2 maybe a few others and use that data to control some additional equipment I will add to the vehicle. I am adding and LPG system to my 1994 chevy p/u. With the flick of a switch I will be able to run on LPG or unleaded fuel. I thought this might be an easy way to get data through the diagnostic link to simplify the installation and wiring. I am not really sure how to get started. Here are some sites I have found that offer some info, but I need help seeing the big picture. www.hit.net\~rah\disassnotes.html www.isthq.com\~dan\aldl.htm www.ag.auburn.edu\~gparmer\bookmark.htm www.franken.de\users\dagobah\luke\scantool.html http://www.obdii.com/obdii.html Thanks Jon ------------------------------ End of DIY_EFI Digest V4 #504 ***************************** 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".