SERT Which setting to adjust
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Road Master
Joined: Jul 2006
Posts: 886
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From: Virginia
SERT Which setting to adjust
I finally have an older laptop and started using the Data Mode. Currently I have a map loaded that when running the bike at constant speeds in the 2000 to 2400rpm range with a Map of 60 to 70 I'm getting a rear knock sensor of 1 to 4. Only the rear cylinder. Doing the roll on test in 2nd gear to red line and back down, I have no knock senser readings. The question I have is, first would you adjust the VE on the rear cylinder to correct the knock in the area above? And two, can I continue to increase spark advance in the higher throttle positions to get better acceleration performance?
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Joined: May 2007
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From: Florida
RE: SERT Which setting to adjust
Go to your data chart find what cells the knock is happening buy looking at the rpm and map load then take out 1/2 the degrees it is retarding the timing. exam if it shows 4 degrees in a cell remove 2 degrees of tining in that cell and you should be good to go.
Doing timing tables befroe the VE tables are done is out of order and your opening your self up to a lot of problems
Doing timing tables befroe the VE tables are done is out of order and your opening your self up to a lot of problems
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Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
RE: SERT Which setting to adjust
Doc 1, thanks for the advice. Can you explain why the spark advance vs the VE table when working on one cyclinder. The Data manual shows both ways of doing it, but doesn't tell you which way is best to change it.
Outstanding HDF Member
Joined: May 2007
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From: Florida
RE: SERT Which setting to adjust
Well if the knock sensor was pulling 10 or 15 degrees of timing out I'd say you had a fuel problem which the VE table has t obe adjusted. The 4 degrees of tiiming your showing can be corrected 99% of thetime with taking out two degrees of timing in that cell. However getting the VE tables syn first will ge t the correct fuel then do the timing to burn that fuel
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Road Master
Joined: Jul 2006
Posts: 886
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From: Virginia
RE: SERT Which setting to adjust
To syn the VE tables correctly requires a dyno tune, setting the AFR tables to 13.1 ? and sniffing the exhaust, adjusting the VE tables to get the same 13.1 ? out of the )2 sensor placed in the exhaust. Is there a way to get the VE tables correct using no sniffer, and just the data mode of the SERT?
Road Warrior
Joined: Mar 2008
Posts: 1,691
Likes: 3
RE: SERT Which setting to adjust
Well, in theory you can set the afr across the board to a value in range of the narrow band sensors and use them to read afr.
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