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Thread: winter engine build

  1. #11
    Member
    Join Date
    Jan 2017
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    N. VA
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    61
    I ran a standalone wideband 02 and verified I had healthy AFRs, and I did so other than a more sophisticated timing map I don't think I am leaving much if any power on the table. I really want to get it dyno'd just to know where I am at with HP/TQ gains but it runs so well I have just not bothered. I found a place near work so I hope to get in there soon.

  2. #12
    Senior Member Chicknstripn's Avatar
    Join Date
    Aug 2014
    Location
    High Point, NC
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    2,144
    I'm interested in the wide band set you're running. Have any links for study purposes you could refer?
    Also interested in knowing about the timing set up. I set mine per service manual and run an Buell race ECM. The bike runs fine the way it is but I know I'm leaving something by my lack of tuning know how. This seems to be the kyptonite in any xb engine build.

  3. #13
    Member
    Join Date
    Jan 2017
    Location
    N. VA
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    61
    I have one like this: http://www.aemelectronics.com/produc...failsafe-gauge

    I had it in my supercharged Lotus during some back and forth adjustments with the vendor and had removed it after verifying the tune so I had it on hand. ANY decent AFR/Lambda will give you the data but this style is super easy to use while riding. Any changes you make to the map can be verified easily by making a few runs. Stock ignition timing had too much advance for this new CR under load, my current setting is about 1 tick mark retarded from stock with the Buell race map loaded. However, I have been slowly editing the timing map and returning the mechanical timing to stock to see what I can gain Vs a wholesale timing reduction. It is by no means done, AFR and CH temps are remaining good with no knock but idle and transition to idle is getting slightly better so I think it is worth the effort, but probably not much difference in performance.

    However, if I load the Buell race tune, set AFV to 114%, enable fuel cut on decel, and retard about 1 tick mark I get good AFR and CH temps and no knock or ping and and nothing to complain about, I am just playing now. Pretty cool considering I was prepared to swap to Sportster electronics to get support for their galaxy or tunes and tools. I kind of still want to do that for a few reasons but with a great running bike it kind of went back burner motivation wise.



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