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Old 06-09-2009, 10:51 PM   #1
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Unhappy problems with my kyosho gt2

Im new to the hobby and i want to tune my car for ultimate performance. I know that it depends on the weather and other factors. but does anyone have some advice on getting it to its full capacity. for some reason it does not want to kick up to second gear. i did the full break in, but it is still slugish when i am trying to take it to full speed. any advice? thanks
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Old 06-09-2009, 11:07 PM   #2
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Hey Man,
So top speed is sluggish? It could be a simple 2nd gear clutch issue, or it could be your motor is not properly broken in and tuned. How experienced are you with nitro 2 stroke tuning. Search "Tuning Bible" here in this thread. It should still be here, and is a great guide for engine tuning. If you are confident that your motor is in good tune, then refer to your manuel and possibly rebuild the transmission.
Hope this helps. Keep us posted
Jason
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Old 06-10-2009, 12:44 AM   #3
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im new to the hobby. I did a good break in. i just dont know how to tune it for performance. i check out that tune bible, but if not does anyone know how many turns it is for high speed needle to be tuned.
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Old 06-10-2009, 01:29 AM   #4
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Quote:
Originally Posted by ManUnitedgt2 View Post
im new to the hobby. I did a good break in. i just dont know how to tune it for performance. i check out that tune bible, but if not does anyone know how many turns it is for high speed needle to be tuned.
Each motor will tune differently, even though the same motor design.

Make sure you have a nice long stretch of smooth road or parking lot to top out on. If you cannot shift in 150' of run either the engine is not revving high enough or the 2 speed is adjusted incorrectly.

If you hear that you are max rev'ing the engine and it will not shift in to 2nd gear then you need to adjust the 2 speed clutch. Read the manual for this adjustment so you are aware of how the 2 speed clutch works and which set screw to adjust. It is very easy to adjust the 2 speed and you do not have to remove it from the chassis.

If you need to make adjustments to the HSN you will want to only make small turns... Think of a clock and tune by changing hours.... not 1/4 or 1/2 turns...
If you are running really rich you will have a significant amount of excess fuel spitting out the exhaust pipe. Temps are somewhat important but I personally tune to sound. Do not exceed 270 degrees F.


If you are new to gas and are unsure of what you are doing... Seek help from the local hobby shop or a local racer...


Good luck
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Old 06-10-2009, 01:50 AM   #5
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thanks for the advice..... all other suggestions are still welcome!!!
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Old 06-11-2009, 04:14 AM   #6
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Originally Posted by ManUnitedgt2 View Post
thanks for the advice..... all other suggestions are still welcome!!!
I think we are all suggestioned out. Did you notice any of the symptoms from the post above you? Hold the car in your hands, while running, slowly rev the motor and listen for sputters or bogging while it builds rpm's. If it revs smoothly and then cuts out at high rpm, you may need to turn the hsn counterclockwise. If it is not cutting out, slowly turn that same needle cw a 1/10th turn at a time or so. eventually it will have an adverse effect, causing the motor to bog by being to lean. At that point, back it off until it is smooth again. As for the tranny, it is either not shifting at all, or it is shifting as soon as the gears begin to rotate, before you would even know to listen for the shift. Try slowly reving the car in hand like earlier. THis time, pay attention for a slight kick, front end rises slightly... whatever, if this happens, then it is shifting to soon, so tighten the clutch. If no jerk, then its not shifting, loosen clutch. Keep us updated, and we should get that thing going soon enough!
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