The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Timing, Was: SU performance tuning... 1800

posted by  Bennie on  Mon Feb 28 21:28 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Nov 28 03:03 CST 2007
[RELATED]

Point is, the old "advance until it pings and then back off slightly" method may or may not pertain to any particular motor.

Very true indeed, people tend to do all kinds of things to be able to run more advanced ignition timing, which is some cases will just be counter affective.

You need the burn to complete as the piston reaches about 10 degrees ATDC.

10 degrees? I would say you'd want peak presure at the point where rod vs crank-big-end-line is 90 degree, so you have maximum leverage. This is more then 10 degree and varies with different rod-stroke ratios. And offcourse peak presure again depends on burn rate which also depends on lots of variables, and oh, rpm offcourse, which is where the advance curve comes in. Anyway, why 10 degrees?

ben
--
P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.