 Engine Management eCtune , Crome , AFC , FMU , Zdyne , Hondata , EMS , TE , Uberdata Anything to control your fuel, spark needs!

# Timing algorithm

0.5 BAR

Join Date: Jul 2004
Posts: 153 Timing algorithm

I was planning on writing a application using java that is a basic base mapper. The main reason i want to make it is because i want to learn java and it seems like a resonable first application.

What is the algorithm for the standard linear retard and step retard.

thanks 3.0 BAR

Join Date: Jul 2003
Posts: 6,449 Re: Timing algorithm

There is no algorithym...its basic math.

For linear just take that last vacuum column and subtract the column heading times the - linear degree of retard.

Example..

If the last column is 28 degrees of advance. At 1.4 psi and a linear retard of -.7 degrees, the new value would be...

28 + (1.4 * -.7) = 27.02 degrees of advance

For stepped...do the same thing but break it down in by a group of boost column headings. For 0-2 psi, the retard would be -.3, for 3-5psi, -.6, for 6-10, -1.0. So with that same example...

28 + (1psi * -.3) = 27.7 degrees of advance
28 + (2psi * -.3) = 27.4 degrees of advance
28 + (3psi * -.6) = 26.2 degrees of advance
28 + (4psi * -.6) = 25.6 degrees of advance
28 + (5psi * -.6) = 25.0 degrees of advance
28 + (6psi * -1.0) = 22.0 degrees of advance
28 + (7psi * -1.0) = 21.0 degrees of advance
28 + (8psi * -1.0) = 20.0 degrees of advance
28 + (9psi * -1.0) = 19.0 degrees of advance Forum
Replies
Last Post
hoggy
Hybrid/Tech
2
06-02-2005 12:36 PM
daquel
Forced Induction
6
01-25-2003 12:19 PM
one800bobby
Hybrid/Tech
1
01-05-2003 09:16 PM
one800bobby
Hybrid/Tech
4
01-03-2003 07:17 PM
Smokey
Forced Induction
9
12-21-2002 02:48 PM Show Printable Version Email this Page 