ok guys got an update for ya.
i got the motor broken in and made a few passes, lets say short lived passes with the stock carb.
i started out pig rich, well let me back up a step, 1st thing on the stock carb the idle screw setting was a little odd, mine came backed Way off but the idle was what i consider a little high, i double checked all the linkage and the servo/radio settings since i had just changed out the servos.
even then with the idle screw backed all the way off i considered the idle too high...
no worries for my testing of the carbs performance, so back to the pig rich run.
the car acted as i had anticipated once i opened it up a couple of passes the carb loaded up heavy on the low end.
brought it in minor tweak on the low needle and back to it, better but still sluggish.
back to the bench we go, minor tweak, lean out again, this time on the bench finding the too lean point and adding 1/8 of a turn back to the fat side.
hit the road with her and still sluggish and i knew i was at the end of the line as far as going too far on the lean side, but i figured what the hell go back 1/16 turn, made no difference.
now these were all on the low side adjustment, the high was close enough for my testing, no bog , decent transition into the highs with just a trail of smoke.
i ran it about 10 mins after finding the edge on the low side and i was back to loading up heavy at idle...
bottom line the stock carb is too inconsistant for my picky a$$, as i had feared it would be.
so off the stock carb came, same for the stock insulator , gaskets , and air filter assy.
on goes the new CY Insulator with Zenoah blue gasket, new
990 carb, new inclined shreadstack and zenoah gaskets along with the HPI baja air filter assy and new Outerwears.
set the needles to 1 1/16 L and 1 1/2 H, double checked linkage and servo settings, primed the beast ( 2 pumps ) and she roared to life on the 2nd pull.
a quick idle adjustment , a few quick blips of the trigger and she was a tick on the fat side .
even being a tick fat on the low needle the throttle response difference was Substantial over the stock carb.
snatched it up off the bench and hit the street, good lord it was night and day, excellent response, very snappy in the mids and i actually had a nice feel for the throttle.
i did several hard runs on it and never once did the tune change or the thing load back up at idle after heavy acceleration passes and going back to base idle.
in the end i can say this change made a huge difference, and one thing is for sure, i will be ordering new A/B gears, the car is geared way to low, acceleration is great but it can definately stand more top end, i can only imagine what will happen when i change out the pipe ...
here are a couple of pics of the new goodies on the car
