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GuzziTech GTM 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 GT di Razza Pura

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    Thanks Buzz! Cooler running engine, more power, better MPGs... and best yet, a BIG smile maker when you twist the throttle. See you again soon.
     
  2. buzglyd

    buzglyd Cruisin' Guzzisti

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    I'm sure I haven't achieved your HP and TQ with my stock exhaust but it's still better than stock and I like the quiet cruise.
     
  3. kiwi dave

    kiwi dave GT Reference

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    How did you measure your mpg, from the dashboard? Remember, the dashboard only knows what the ECU is telling it, and is unaware of the changes the power commander is making. If you note your fuel quantity when refilling and the mileage since the last refill, you can calculate the true mpg. The results may not be so wonderful; I was fooled by this for a while too, until I thought it through.

    Notwithstanding my comments, I agree the GT-Rx fueling package is very impressive.
     
  4. buzglyd

    buzglyd Cruisin' Guzzisti

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    I will measure it the old fashioned way as well. I had my suspicions also.

    But, the overall results are tremendous.
     
  5. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Yes, use the gallons used to miles ridden method. As Dave says, the dashboard # is based on OEM fueling. I think you'll find you are getting much better then stock. All of my 8V's get high 30's in the Winter, to mid 40's in the Summer.
     
  6. kiwi dave

    kiwi dave GT Reference

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    Went for a long ride yesterday in 23°C (73.4°F) temperature, spirited ride with lots of corners and gear changing.

    Upon refill, dashboard indicated 5.1 litres per 100k (47.0 mpg (US), 56.5 mpg (UK)).

    Tank took 9 litres for 160 Km, actual fuel consumption of 5.6 litres per 100k (42.0 mpg (US), 50.4 mpg (UK)).

    Bike has the full GT-Rx fueling package, and GT-Rx exhaust system. I'm very comfortable with these figures.
     
    John L and GT-Rx® like this.
  7. blakbird

    blakbird Cruisin' Guzzisti GT Famiglia

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    With Todds very detailed instructions and photographs to guide us every step of the way, my son and I installed the BMC air filter, the Gt-Rx fuel management package, and re-flashed the ECU about 1,500 miles ago.

    The difference in performance, throttle response and overall smooth running, of an already smooth running bike, was amazing.

    About 1,200 miles ago I took advantage of a GT-Rx special offer on SS Zard shorty mufflers.

    Between the visceral response to the deep throated exhaust note and the extra kick in the rear at each spirited roll of the throttle between, about, 3k and the soft rev limit / red line, the riding experience changed yet again. It is even more fun to ride my Cali Custom now.

    IMO the GT-Rx fuel mod / ECU re-flash package, and less restrictive mufflers, are by far the best upgrades I've ever made to any bike.

    My hat is off to Todd.

    It can't be easy, quick or cheap to find the right parts and partners. AND once the parts are identified and partners wooed there must be countless hours in testing, changing, and retesting maps, routing wires, installing modules etc. just to unleash the beast in these engines.

    :clap: :clap: :clap:
     
  8. north2south

    north2south Tuned and Synch'ed GT Contributor

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    Hi Skipper. Did you ever get your bike on that dyno? I would like to know what the readings were.
     
  9. sir fred

    sir fred Cruisin' Guzzisti

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    Put my bike on the Dyno. The numbers look high but it certainly feels impressive. This is the results: 105hp..102 torque.

    IMG_4098.JPG

    IMG_4101.JPG
     
  10. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    I hadn’t dyno’ed the full short system yet, but I’m not surprised. Beautiful lines. So 25 hp & 27 lb.ft. of torque gain over stock! GTM delivers again. ;)
    Stock is 80hp/75 ft lbs, so significant increases. Full long system was just under 100 hp/96 ft lbs; https://www.guzzitech.com/forums/threads/guzzitech-gtm-modded-cal-14-dyno-vs-stock.13773/

    p.s. It usually takes ~3 runs to see max power on the dyno.

    Nothing else to add but enjoy! Thanks for posting.
     
  11. sir fred

    sir fred Cruisin' Guzzisti

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    Great Job, Todd!..and Thanks!
     
  12. north2south

    north2south Tuned and Synch'ed GT Contributor

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    The Moto Guzzi specs state 96 HP and 87lbs of torque. Why the difference?
     
  13. John L

    John L Cruisin' Guzzisti GT Famiglia

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    Moto Guzzi specs taken at engine, dyno taken at rear wheel, difference is due to losses in power train between engine and rear wheel.
     

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