| Author |
Message |
    
Typeone
| | Posted on Thursday, October 11, 2007 - 10:24 am: | 
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the dyno plot below shows a 'best of' run from 2yrs ago with the TFi fitted (bad tuner too!), Race ECM, K&N and stock inner airbox vs. the blue/red lines from a few weeks ago with a custom fuel map, TFi turned off, UNI filter and 07 inner/outer airboxes.
work in progress but looks like i'm improving things a bit. curious why my torque curve starts low ... then plummets after ~5.5K (?) i'll be heading back on the dyno soon, the tuner had never seen a Buell. he couldn't get any sort of reading but 18 on the a/f scale until Kevin Drum schooled him on dynoing a Buell. crazy off/on with the key, etc. THEN we started getting results captured. so weird. makes me wonder if i should disconnect the O2 next time to just get straight map readings. take the learning stuff out of the equation since i know my current fuel map is running a solid 100% AFV.
Year 2005
Model XB12S
Displ. 1203cc
Compression Ratio stock
Intake/Filter UNI foam filter, 07 inner/outer airbox
Carb/EFI Model EFI
EFI Augmentation Module TFi (black line), mapped ECM (red/blue lines)
Intake Manifold stock
Heads/Porting stock
Cylinders stock
Pistons stock
Header stock
Muffler Drummer original
Cams stock
Lifters stock
Pushrods stock
Rocker Arms (Roller Tipped?) stock
Ignition/ECM Module/Curve Race ECM
Static Timing (degrees from stock spec) stock
Gear (usually 4th or 5th) 4th
Chain or Belt Final Drive Belt
Engine Oil Brand/Grade Mobil 1 15W50
Tranny Lube Brand/Grade Mobil 1 15W50
Fuel (Type/Octane) Mobil 93
Turbo/Boost n/a
Nitrous/Flow Rate n/a
Dynomometer Model/Mode
Correction Method (SAE/STD/None) STD, 0 smoothing
Miscellaneous Notes re-routed breathers |
Blake
| | Posted on Friday, October 12, 2007 - 04:40 pm: |
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The magnified scale (55 to 75 FT-LBs) of your torque curve plot is likely causing you to perceive that it "plummets after ~5.5K" when in fact it is remaining quite flat. Note that your HP is still increasing even at the rev limit. Plot the torque on a 0 to 100 FT-LB scale and it will look nice and flat, as it in truth pretty much is.  |
Blake
| | Posted on Friday, October 12, 2007 - 04:43 pm: |
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You might also ask your dyno tech to plot all the results using the SAE correction factor instead of STD. Reportedly, the STD factoring may not correct for varying humidity as well as the SAE scheme. |
Typeone
| | Posted on Friday, November 02, 2007 - 08:31 am: |
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thanks, Blake. so if i ring my dyno tech today can he just pull up the saved file and re-plot using SAE correction or do you mean do a new run and plot to SAE next time? is it also possible for him to plot an old run using 0-100 FT-LB scale for torque?
just curious what's possible for him to do before i call or drive down there.
thanks in advance! |
Rick_a
| | Posted on Friday, November 02, 2007 - 11:39 am: |
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Switching back from a Uni filter to a K&N will gain some power, too. |
Typeone
| | Posted on Friday, November 02, 2007 - 11:41 am: |
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really? why do you say? the black line above is with a K&N, the red and blue are with a UNI |
Blake
| | Posted on Friday, November 02, 2007 - 03:58 pm: |
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Clinton,
The SAE environmental correction factor is unrelated to how the torque and HP plot scales are presented wrt their applicable graph axis scaling. Just tell him you want the torque plotted to the exact same scale as the HP (from 0.0 to 100 instead of from 55 to 75). It's what most dyno operators usually do. Have him put the torque and HP on the same plot.
If you can obtain a copy of the Dynojet Winpep ".dat" file (your tech should easily be able to email it to you), you can download Winpep free from the Dynojet site, or just email the file to me and I'll plot it for you. |
Typeone
| | Posted on Friday, November 02, 2007 - 04:08 pm: |
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Blake, appreciate that info and the offer to plot the .dat file. I'll get in touch with him and see what I can do.
Thnx! |
Blake
| | Posted on Sunday, November 04, 2007 - 08:42 am: |
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The Winpep .dat files are typically very small, only four or five KB, so it should be a very simple matter for your Dyno tech to email them to you. I'll look forward to receiving them.
That gives me an idea too. Starting a library of not only dyno testing results, but also of the actual data files. |
Rick_a
| | Posted on Tuesday, November 06, 2007 - 12:51 pm: |
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In my experience the K&N filters have always edged out UNI's. |
Jayvee
| | Posted on Tuesday, November 06, 2007 - 01:06 pm: |
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The Airbox looks like another difference between them, and "TFI" ?
It wasnt' just the UNI vs. K&N I mean, as the only change.
Is that right? |
Typeone
| | Posted on Tuesday, November 06, 2007 - 01:17 pm: |
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yes, correct Jayvee. not a direct comparison for the filters.
black = stock inner airbox, K&N, TFi
red/blue = 07 inner airbox, UNI, tweaked fuel maps
my K&N didn't fit the 07 airbox that well, had gaps and the metal screen started to deteriorate. ditched it for the UNI foam.
i'm actually back to the stock ECM with tweaked race fuel maps and a little different plug gap than those last runs. bike is running GREAT. prob wont get on the dyno this season again but def will when i can. curious to see the changes, if any, from the red/blue lines. |
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05 XB12S dyno runs 092807