kaw now
Expert Class
Posts: 446
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posted June 19, 2010 06:02 PM
Dyno says too lean
Here's my big story did a 25 dollar dyno day test. Their machine showed 16 to one fuel ratio he called valve burning lean. I know that's lean too lean for sure if their machine reads right. I have a Yosh full and removed the silencer for the test but always run with it in. I use the power commander III map for no flys and Yosh full system. I also reset my fuel on the top end to 100 percent instead of the -10 like they had. My question is this does that sound reasonable for the bike to be that lean using 100 percent of stock. Do most of you drag racers use more than 100 percent of stock at full throttle higher rpms. Not asking for trade secrets on mapping but kind of curious. Only other mod is screen on air filter removed, 06 model flys of course out.
  
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Shane661
Needs a life
Posts: 11494
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posted June 19, 2010 06:04 PM
 Edited By: Shane661 on 20 Jun 2010 02:41
It should not be lean if you have zero's in the cells from say, 10-11k rpm.
Most maps will still be around -5 (or leaner) in those zones...even with oxygenated fuel and a full exhaust.
Perhaps they are charging the $25 in order to scare you into a tune?? Did they suggest their services??
Shane
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zx14r09se
Novice Class
Posts: 92
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posted June 19, 2010 06:10 PM
get a new map ...you ll blow your motor ....and your loosing big hp if that lean ....dose the motor pings when your at low rpm and a WOT....the valve it could be... no new noise?????takes more gas????in the pc how are the tables in the + or in the -...any fi ligth on at some point
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kaw now
Expert Class
Posts: 446
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posted June 19, 2010 08:28 PM
Thanks for the replies. Shane that is interesting I didn't see how it could be that lean as it seems to run fine no ping etc. They did seem of course to mention a tune. Maybe some O2 sensor or autotune type thing might be the best method.
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Quarter Pounder
Pro
with Cheese
Posts: 1069
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posted June 20, 2010 07:26 AM
quote:
Thanks for the replies. Shane that is interesting I didn't see how it could be that lean as it seems to run fine no ping etc. They did seem of course to mention a tune. Maybe some O2 sensor or autotune type thing might be the best method.
Best method would be to put it on a proper dyno with a reputable shop and go from there. Ask around for some recommendations.
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SWB 2008 ZX-14
9.19 @ 151
5.98 @ 123
1.53 60'
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1badzx12r
Needs a life
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posted June 20, 2010 07:53 AM
Edited By: 1badzx12r on 20 Jun 2010 15:55
was your clean air block off ..hummm
i can tell you what 16 to 1 on topend does ..you'd be buying pistons
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01smokes
Needs a job
Posts: 2243
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posted June 20, 2010 08:10 AM
quote:
was your clean air block off ..hummm
i can tell you what 16 to 1 on topend does ..you'd be buying pistons
when i 1st put spray on my bike i went and had it tuned and the dumb ass did a pull with the afrs 14.5-15.0 on SPRAY im glad i had c16 in the tank just for the tuning
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Shane661
Needs a life
Posts: 11494
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posted June 20, 2010 08:53 AM
quote:
was your clean air block off ..hummm
i can tell you what 16 to 1 on topend does ..you'd be buying pistons
Do you really think a bike with zero's in the 100% column is running 16:1? Not unless something else is broken...the tune is not the issue.
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1badzx12r
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posted June 20, 2010 09:00 AM
that's why i ask if the kleen air had block off's . cause its pulling air into the exhaust .. cause like i stated 16.1 is piston melt under load ..
WHERE SHANE DID I SAY THE TUNE IS THE ISSUE..... WHERE
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kaw now
Expert Class
Posts: 446
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posted June 20, 2010 09:36 AM
I have been thinking about the clean air valve, I put a plug in the intake going to the air cleaner box. On decel sometimes backfires still so maybe it could be still working to some degree. Could you read the plugs like the old days or is that valid?
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Shane661
Needs a life
Posts: 11494
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posted June 20, 2010 09:44 AM
quote:
I have been thinking about the clean air valve, I put a plug in the intake going to the air cleaner box. On decel sometimes backfires still so maybe it could be still working to some degree. Could you read the plugs like the old days or is that valid?
Yes, you can read the plugs.
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Shane661
Needs a life
Posts: 11494
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posted June 20, 2010 09:45 AM
Edited By: Shane661 on 20 Jun 2010 17:46
quote:
that's why i ask if the kleen air had block off's . cause its pulling air into the exhaust .. cause like i stated 16.1 is piston melt under load ..
WHERE SHANE DID I SAY THE TUNE IS THE ISSUE..... WHERE
My bad. Jesus, man...eat a box of Krispy Kremes and relax. 
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1badzx12r
Needs a life
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posted June 20, 2010 09:56 AM
Edited By: 1badzx12r on 20 Jun 2010 18:06
I am chill . no do-nuts got to beat wee ..
well if you got the kleen air block off ..And if the dyno sniffer is good . then buy a wideband and know what your A/F is all the time
i made my own block-off by threading the cap's intake with a 1/8th pipe thread and screwed in bull plugs ..
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zx14r09se
Novice Class
Posts: 92
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posted June 20, 2010 01:08 PM
quote:
quote:
Thanks for the replies. Shane that is interesting I didn't see how it could be that lean as it seems to run fine no ping etc. They did seem of course to mention a tune. Maybe some O2 sensor or autotune type thing might be the best method.
Best method would be to put it on a proper dyno with a reputable shop and go from there. Ask around for some recommendations.
i had a big problem with autotune last month...it was trimming all in - did a lots of test everything was good ...befor trashing it with a hamer i change the o2 sensor and bingo now its working good
it was showing afr and did the test with the reset button and it was telling me that it was ok but it wasint and by the way i can not complaine on dynojet support cause they dont have any my 2 cent
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LAB3
Needs a job
Posts: 2977
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posted June 20, 2010 04:30 PM
quote:
quote:
that's why i ask if the kleen air had block off's . cause its pulling air into the exhaust .. cause like i stated 16.1 is piston melt under load ..
WHERE SHANE DID I SAY THE TUNE IS THE ISSUE..... WHERE
My bad. Jesus, man...eat a box of Krispy Kremes and relax.
Funny....Wee has him worried. Too late on the advice on the kremes. :-)
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1badzx12r
Needs a life
Posts: 8321
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posted June 20, 2010 08:12 PM
i had pizza today
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