Is stoichiometric air/fuel ok for these air cooled engines?

49er

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Join Date: Jul 2006

Posts: 1517

Location: Napier, New Zealand
#16

03-17-2009, 03:18 AM

Ola and 82Shafty both links provide exellent reads, thanks.

The link below shows my Dynajet graph. You will see that peak torque happens at 12.8-1 AFR (6750 rpm) and peak HP at 13.4-1 AFR (9000 rpm)
After 9000 rpm the AFR starts to slightly richen again. Carb, filter and cam flow inefficiencies probably start to cause this. Nice to know that it's not drastically leaning off past 9000 though. These AFR's are all achieved through VM carbs and airbox, with WOT from 2000 - 10000 rpm.

http://i155.photobucket.com/albums/s309/49er_photos/MainAnalysis.jpg

Last edited by 49er; 03-17-2009, 03:24 AM.

:) The road to hell is paved with good intentions......................................

GS 850GN JE 894 10.5-1 pistons, Barnett Clutch, C-W 4-1, B-B MPD Ignition, Progressive suspension, Sport Demons. Sold
GS 850GT JE 1023 11-1 pistons. Sold
GS1150ES3 stock, V&H 4-1. Sold
GS1100GD, future resto project. Sold

http://i155.photobucket.com/albums/s...s/P1000001.jpg
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