zrxzx12r1
Novice Class
Posts: 34
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posted March 06, 2002 03:45 PM
TPS
Another TPS question! Way back when the bike was stock I jacked up the TPS output to 1.142V from standard. This cured the small surge problem that I had. Now I have the usual mods, Akra, K&N's, PCIIIr etc. I have been working on the on/off throttle response, to help me in future track days, and was wondering if I should put the TPS back to stock. I added fuel to the 0 & 2% throttle positions, +30, and the bike would not idle at all so I dropped it back to +15.
Comments appreciated.
Steve
  
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kcadby
Pro
Posts: 1733
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posted March 06, 2002 05:43 PM
Yes...put the TPS back to STOCK...that's what the PCIII is for...tuning...
Why do you think you need so much fuel at idle???
LESS is better IMO (doesn't mean less than zero #s though)...
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ZRXZX12R1
Novice Class
Posts: 34
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posted March 06, 2002 07:51 PM
Anytime I have had this type of situation before it has been because the motor is running lean at these low throttle positions - on my local dyno with the bike at idle the air/fuel ratio indicated a significant lean condition. Again in my experience as you open the throttle the motor momentarily falters and then kicks in resulting in a pronounced on/off response. I am certainly open to any suggestions.
Steve
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krexken
Zone Head
Posts: 732
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posted March 06, 2002 09:00 PM
I think you're going in the right direction but you probably only need to add fuel to the 4000rpm and up scales or wherever you're encountering the on/off abruptness. Mine does the same thing also. I've helped it by adding fuel there but not cured it. Even at +29 at 1000rpm, mine idled at a 14.9 to 1 ratio. My first trackday is Monday! Definitely bringing the laptop.
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ZRXZX12R1
Novice Class
Posts: 34
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posted March 06, 2002 09:25 PM
Let me know how the track day goes. My first time out on the 12 is April 18th at PIR, Portland.
Steve
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Zx23rr
Expert Class
Mahogany Bomber Pilot
Posts: 242
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posted March 07, 2002 07:54 AM
Careful...........
of the A/F ratio numbers you get at idle. Also if your KLEEN air stuff is hooked up your A/F numbers may or are going to read high.
Later........................../
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