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Page last modified 13:06, 27 Aug 2007 by internetscooter
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vespalabs.org > Labs > Lab Research > Dyno Results > Air Filter Hole and Sito Plus

Air Filter Hole and Sito Plus

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Table of contents
  1. 1. Aim
  2. 2. Method
  3. 3. Results

./richard dyno(Medium).JPG 

Aim

This dyno result was from Richard Scouse's late model PX. The idea behind this test was to show the power difference you get by first doing a simple cheap change (the Air Filter Hole) and then adding a Sito Plus Exhaust later (retaining the Air Filter modification).

Method

  1. The scooter was taken back to standard and run on the dyno.
  2. Next the Air Filter Hole modification was done, with the main jet changed to 118
  3. Finally a Sito Plus Exhaust was bolted on, with the main jet changed to 122

Results

No air/fuel ratio results were available for this dyno, so carb settings have been based on guess work rather than any tests.

The most interesting conclusion was that the first change provided the biggest benefit.

Red Line = Standard (116 main jet) 
Blue Line =  Air Filter Hole (118 main jet) 
Green Line = Air Filter Hole + Sito Plus Exhaust(122 main jet)

./Px198 std red airhole blue airhole sito green sml.jpg


./Px198 std red airhole blue airhole sito green (1).jpg

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Comments (2)
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#1
vespavintage says:
Next question, has anyone fiddle with the other jets?
Posted 20:55, 2 Aug 2008
#2
internetscooter says:
yes but nothing that can be documented. I have http://www.vespalabs.org/User:Internetscooter/Wideband_Oxygen_Sensor but need to set up tail pipe sniffing.
Posted 07:43, 3 Aug 2008
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