DIY_EFI Digest Thursday, October 7 1999 Volume 04 : Number 566 In this issue: Re: Up Up and away Introduction See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 08 Oct 1999 01:18:11 +1000 From: Phil Lamovie Subject: Re: Up Up and away

Hi All,

Recent postings regarding MAP sensors are in need of a little
massaging.

Lets start with the definition    manifold ABSOLUTE PRESSURE
means what it says. Not relative or delta but absolute.

Any ECU mapped by speed/density AUTOMATICALLY corrects
for engine load with altitude.

Question 1

How does the engine differentiate between part
throttle vacuum at sea level and full throttle at 10,000 feet ?

Answer It doesn't. There is no difference.

There is no need to check and record MAP value before startup.
As the pressure varies absolutely so should the fuel table value.

Speed density demands only RPM and MAP (air temp correction is
not mapped but mathed. same for all other basic corrections)

If the table has 16 speed values and 16 load points you will
have sufficient date to run the engine reasonably.

Pilots had to correct mixtures only with badly designed fuel systems.

The mech/injected engines had no such problem.

Phil Lamovie
Injec Racing ------------------------------ Date: Thu, 7 Oct 1999 10:14:40 -0700 (PDT) From: Bob Moon Subject: Introduction Hello all, I'm new to the list, and thought I'd introduce myself. My name is Bob Moon, and I'm a Test Engineer at Amdahl Corporation in Sunnyvale, CA, USA. I am currently working on a fuel injection system for some motorcycles, and will possibly be basing it on the EFI332 system. The motorcycles to be converted are a 1985 GPz900, 1995 and 96 Shadow 1100C, 1981 KZ550, and 1978 GS400. I'll also likely install it on a 1968 Mustang. This should be an interesting project, as I intend to use identical base computers for all the above bikes, so the code will have to be easily adaptable to various cylinder configurations. Happy injecting, Bob Moon __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com ------------------------------ End of DIY_EFI Digest V4 #566 ***************************** 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".