Author Topic: reference tooth table  (Read 5750 times)

Offline Seight-v8

  • Sr. Member
  • ****
  • Posts: 339
  • BHP: 6
    • Members Page - Scott Richmond
reference tooth table
« on: November 25, 2009, 12:55:14 am »
hello all,

I have 27, 18, 9, 0 in my reference tooth table.

Can someone with the the idiots guide meaning to this info.

cheers

scott
Engine:Rover V8 4600cc
Vems Firmware:V1.2.38, GPS, SDcard, LCD & Dual lambdas, Wasted spark, 36-1 trigger, Cam Sync & Bluetooth serial.

http://www.vems.hu/wiki/index.php?page=MembersPage%2FScottRichmond

Offline rob@vems.co.uk

  • Hero Member
  • *****
  • Posts: 3115
  • BHP: 49
    • VEMS Forum
Re: reference tooth table
« Reply #1 on: November 25, 2009, 01:45:20 am »
Due to the strange air in far off countries the table is traversed backward.

You have a V8 with a 36-1 trigger wheel which means 9 teeth between each cylinder, so the first trigger tooth is 0, then 9 (0+9), then 18 (9+9) then 27(18+9).

This is designed to allow irregular trigger teeth and odd-fire engines.

FWIW 36-1s for:

4 cylinder: 18 0 18 0 ...
6 cylinder: 24 12 0 24 12 0 ...

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: reference tooth table
« Reply #2 on: November 25, 2009, 01:47:02 am »
In fact it reeds backwards: 0-9-18-27. It is refference points on your trigger disc for engine events calculation. You have 36 or so called 36-1 trigger disc. and each event is separated by 90deg or exactly 9 teeth.

Gints

Offline Seight-v8

  • Sr. Member
  • ****
  • Posts: 339
  • BHP: 6
    • Members Page - Scott Richmond
Re: reference tooth table
« Reply #3 on: November 26, 2009, 12:30:44 am »
cheers guys,

i knew there would be a easy to understand explaination.

learning all the time now....lol.

scott
Engine:Rover V8 4600cc
Vems Firmware:V1.2.38, GPS, SDcard, LCD & Dual lambdas, Wasted spark, 36-1 trigger, Cam Sync & Bluetooth serial.

http://www.vems.hu/wiki/index.php?page=MembersPage%2FScottRichmond