OS .28XZ
09-25-2007, 11:57 AM
#1
OS .28XZ
I am having trouble tuning this motor.
Top end is unreal, bottom to 1/4 is a little fat. If I stab the gas it leaps. If I run 1/2 for more than 30sec than stab it, it looks like the bug man going down the track.
I know it has a mid adjustment but every one says leave it at factory setting. What to do?
Top end is unreal, bottom to 1/4 is a little fat. If I stab the gas it leaps. If I run 1/2 for more than 30sec than stab it, it looks like the bug man going down the track. I know it has a mid adjustment but every one says leave it at factory setting. What to do?
09-25-2007, 04:10 PM
#2
Tech Master
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An OS engines, I almost never touch the mid....
Did you do the pinch test on the fuel line to determine bottom-end? Usually after I adjust the high-speed then bottom, I'm usually good to go...
Did you do the pinch test on the fuel line to determine bottom-end? Usually after I adjust the high-speed then bottom, I'm usually good to go...
09-25-2007, 07:56 PM
#3
How far away from the carb should I pinch?
09-26-2007, 08:07 AM
#4
I would recomend that you replace the carb restrictor with 7mm OS Speed restrictor, T2060 pipe to smooth out the bottom and if your running a Mugen or Kyosho ST-R use the Hyper heavy flywheel. We are haveing alot of luck with this setup our temps are at 200-220 deg and we are getting about 8-10 min runtimes.
09-26-2007, 03:15 PM
#5
where can i find this hyper heavy flywheel, i had heard that a heavier flywheel would calm it down alittle, mine runs great. ran it at the futaba nitro challenge, finished 7th in amain.
jlo
jlo
09-28-2007, 07:21 AM
#7
So if nobody uses the mid setting, why did OS put it on the carb?
10-01-2007, 12:30 PM
#8
Diito
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