RentAGuzzi Motorcycle Rentals & Tours – Los Angeles CA
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GuzziTech GT-Rx Modded Cal 14 Dyno vs. Stock

Discussion in 'Cal 1400 8V' started by GT-Rx®, Sep 10, 2014.

  1. GT-Rx®

    GT-Rx® Administrator Staff Member

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    I finally got the RentAGuzzi GT-Rx® modded Cal14 on the Cycle World dyno late yesterday, and the results are below. A completely stock 1400C shown as a blue trace below, then with my GT-Rx® Slip-on mufflers and H-pipe with opened air box lid and GT-Rx® Fueling kit, results in the green trace: ~6-8 hp constant gain, and 8 lb.ft where you'll live the most.
    With the full GT-Rx® Exhaust & Fueling Kit along with the modded air-box lid & BMC filter (gold trace) = ~20 hp & 20 lb.ft. gains over stock with a 40 degree lower operating temperature!

    [​IMG]


    GTCal14CWDyno-2.jpg
     
  2. Mal W

    Mal W Just got it firing! GT Contributor

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    Hey Todd, that is a nice result. Having 65hp at 4000 revs is a lot of mumbo where I would use it most, for general riding and passing on the freeway. I would like that out of my 1200 Sport.

    I have a technical question about running bikes on the dyno. How fast did the engine run up through the revs? Or, in what gear did they perform this test? The reason I ask is because I suspect that bikes with heavy flywheels are penalized for being slower to rev. It takes power to spin the engines own inertia up to top revs that might not be factored into the calculations. Is there a way to configure more resistance on the dyno or choose a higher gear (say 5th gear or top gear) so that the climb is slower? This would reduce the effect of the heavy flywheel and might provide an even better result.
     
  3. GT-Rx®

    GT-Rx® Administrator Staff Member

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    Thanks, and the more impressive feel is just off idle and mid-range roll-on, which isn't shown on the graph above.
    Most dyno pulls are done in higher gears, yes. I personally did the runs, and used 5th gear. Flywheel weight has little effect on the numbers on the dyno other then the rate/time in which they achieve max power.
     
    Mal W likes this.
  4. Skipper

    Skipper Tuned and Synch'ed

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    Hi Todd, there is a dyno available just down the road from my mechanic, so as soon as my new parts are received and fitted, I'll head down there.
    I'll also report back in detail
    on-road impressions. Looking forward to arrival.
     
  5. Tuono

    Tuono Tuned and Synch'ed

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    Todd

    Query, full PCV, AT300 and air box modification, any consideration to larger diameter header pipes/exhaust

    Regards

    Tuono
     
  6. GT-Rx®

    GT-Rx® Administrator Staff Member

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    Now shown above in gold trace.
     
  7. automattic

    automattic Just got it firing!

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    Im curious as to how the ECU mods effect the stock fuel profiles of rain, touring, and speed. Are they still available? Do they still perform their functions, ie does the rain profile still reduce engine power?
     
  8. GT-Rx®

    GT-Rx® Administrator Staff Member

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    Yes, full functionality is still in place. Again, AFR/fueling is seperate from those settings. The "map" settings all limit power to the rear wheel at various throttle positions using the traction control feature. Even the Veloce/Race setting does not give full power to the rear wheel anywhere in the table, including full throttle.
     
  9. automattic

    automattic Just got it firing!

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    Oh ok. Thanks. So is it like you have one main map and the 3 profiles just determine when power is limited on that map?
     
  10. GT-Rx®

    GT-Rx® Administrator Staff Member

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    Yes, one main fuel map. An internal combustion engine requires a specific air/fuel ratio. Which A/F target ratio is dependent on many variables; Air-cooled engines are largely fuel cooled, so lean emission requirements crush power and add immense heat. Modern engineering to keep most from melt down, much less even run (in stock trim), is nothing short of miraculous.
    A/F Ratios on modern Guzzi make everyone even slightly knowledgable with fueling, cringe at the sight.
     
  11. gdp

    gdp Cruisin' Guzzisti

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    ....Am I interpreting correctly?...that torque is lower until mid-5000 rpm range?....or, ?....
     
  12. GT-Rx®

    GT-Rx® Administrator Staff Member

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    No. Both HP and Torque have impressively increased as hopefully (more clearly now) noted below:

    GTCal14Dyno-Noted.jpg
     
  13. Guzzi_Lou

    Guzzi_Lou Cruisin' Guzzisti

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    Wow, VERY nice gains there.
     
  14. buzglyd

    buzglyd Tuned and Synch'ed

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    I'm thinking the fuel and airbox mods and the stock pipes might provide enough gains and still keep her purring nice and quiet.

    I still haven't hit the first service mark but I'll be watching this space.
     
  15. Skipper

    Skipper Tuned and Synch'ed

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    Mine sounds like Richard Petty's car
     
    BMT, Wisconsin v7 Racer and GT-Rx® like this.
  16. Guzzi_Lou

    Guzzi_Lou Cruisin' Guzzisti

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    Any issues finding room for the 2 PC boxes? Any splicing/cutting required?
     
  17. GT-Rx®

    GT-Rx® Administrator Staff Member

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    OK, I was finally able to do a real overlay shown below. Completely stock bike = blue lines, GT-Rx® Mufflers, and opened air box lid with GT fueling kit = green lines, GT-Rx® Exhaust, Open lid air box w/BMC and full GT fueling kit = gold lines. Again, almost 20 hp and 20 ft. lbs. of torque gains.

    GuzziTechC14DynoRuns.jpg
     
  18. Guzzi_Lou

    Guzzi_Lou Cruisin' Guzzisti

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    Those are phenomenal gains ... this engine likes to breathe!

    Todd, tell me more about the "Open lid air box w/BMC" ... BMC is a drop-in replacement panel filter right? Is the lid just removed from the stock air box or is there more?
     
  19. GT-Rx®

    GT-Rx® Administrator Staff Member

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    Heh, well, it doesn't like to be choked as it is delivered. ;)
    For the modified lid, I just completely cut and removed the area above the filter. You can DIY by doing the same or drilling a bunch of holes in that area. The filter is held on by trim ring, from the inside of the lid. The >BMC Filter< is a high-flow element (much better quality over K&N, but same technology), and is drop in, yes. I need to mention here, that even a bone stock bike really needs the fueling corrected (dealers cannot do this) in order to have a long, healthy life. Any modifications exacerbates the uber-lean fueling.
     
  20. buzglyd

    buzglyd Tuned and Synch'ed

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    I've gone through a full tank of gas since Todd installed his magic on my fueling system.

    All I can say is WOW! I'm still running the stock exhaust so I might not have the gains that one would get with Todd's exhaust system but the bike has been transformed. Previously, I had to keep it above 3000 RPM at all times because it didn't fuel properly below that and would surge and stumble. Now, she pulls strongly and the engine seems to have less vibration and it just hauls ass.

    As an added benefit, fuel mileage has increased dramatically! I would average around 34 MPG prior to the mods. This last tank was a mix of freeway and curves in the hills and city riding. 43 MPG!

    Todd's service was awesome. If you have the dough, you can't afford NOT to do this.
     
    GT-Rx® likes this.

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