The Optima Mid was designed in 1987 and released to the public in 1988. It was kyoshos Top 4WD buggy in 1988 - 1989, and replaced by the Lazer ZX in 1990. This blog is created by me to let all other Optima Mid owners know what modifications i did to the car to improve its performance, or just to substitute parts to get it runnable.
Tuesday, 1 May 2012
Big Bores, Such a boar??
I finally tested the big bores on my Optima, and at first i had 20wt oil in them , and they were too soft. it was bottoming out too easily. i took the advice of some drivers at the track, and put 50wt oil in the front, and 30wt in the rears. The car is now much easier to drive and i am finally clearing the jumps, small and big most of the time ! Before it was only some of the time. I also tried to place the front shocks to give it more ride height and droop, and i found that the car goes over the small bumps much better instead of nose diving, so it goes through the whoop de does much quicker. I also learnt a technique to clear the big jump, go up the hill quickly build momentum to the jump and at the end of the jump brake, the car will land nicely on the backside of the landing jump. However i still find the car under powered with a 10.5T, so the next step is to get a 9.5T or 8.5T. Also it seems my 5 year old Speed Passion GT1.1 ESC is finally giving way. after a few hard bumps, the calibration of the ESC went off. I had to recalibrate a few times. Now i have to buy a new BL sensored ESC and motor for my buggy, more expense needed, becuase of the coming race on the 25th. I managed to break a front right lazer arm and bend the RCPS titanium hingepin from hitting the backside of the jump squarely. So now i place ZX-5 arms and uprights on the front end of my Mid. I will also drill a few more holes on the rear of the James Instone shock towers to give the rear a little more ride height and droop becuase it seems to snag at the cement hill bank while going up, losing some speed build up for the big jump. will report back in 2 weeks. In the meantime i will be driving my Kawada SV-10 Alcyon II this weekend and giving my Optima Mid a rest. Dont worry it will come back with a vengeance !
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