lethalsassonic

iTrader: (1)

Hey guys, I'm running a Kyosho MP 777 with an OS .21 VG Motor. I like to tune my buggy with the body off so I can reach the needles easier, but when I put the body back on, the settings are slightly off. I have plenty of airflow, there are holes around the engine and where I refuel. I'm assuming the temperature rises though, and perhaps less air gets into the carb, so is the general solution for this just leaning out both needles by an hour before putting the body on? Is there a simple solution, or is this a case-by-case basis? Give me some opinions please. Thanks!

losi_racer

iTrader: (25)

whats going on? is it loading up? if so on top or down low

slumlord

iTrader: (10)

check to make sure your body isn't covering your exhaust pipe. I only say this because I have seen that before!

lethalsassonic

iTrader: (1)

The body is not doing anything to the muffler, and it's not pinching a fuel line, the tuning just changes when I put the body on. I feel the buggy struggles a bit at mid-throttle. Do u guys notice a difference running w/and w/out the body?

cluffy1

iTrader: (6)

hay wat up

no i don't notice a differance

is the car just dieing as you are putting the body on or is it dieing as soon as you put the body on.

if it is dieing as you are putting the body on than it is probebly just ideling to long and has quite(keep the engine reved, every 10 secs just a quick tap)

if it is die as soon as you put the body on it could be cause the pipe is being blocked the air has been retricked or the air filter tube has been kinked. all will make the car stop.

if all else fails go back to stock settings and start again(with the body on) you may just have to change the tune while the car is off and then start it with the body on.

hope this helps
good luck
dane

token

Do you have a clean air filter, I have seen theis case before and the air filter was dirty and was not pulling enough air when the body is on

other than that how are you tuning - are you waiting for it to warm up first or just starting and tuning

and how is the tune changing. what is it doing

lethalsassonic

iTrader: (1)

It doesn't die as soon as I put the body on, it idles fine, that's not the problem at all, the problem is the tuning is just a bit off when I run it.


I always clean the airfilter and then oil it before using the buggy, and if the air filter is nasty I replace it. The exhaust is not blocked at all, it's not that, I warm up the car and measure the temperature before tuning, I know all the basics and follow the book, the buggy just loses a little at mid throttle and top end when I put the body on, does that indicate it's too rich? I'm going to the track Sunday so I want a little gameplan first so I'm not tuning all day long!

slayyer

iTrader: (29)

what temps is the motor running at?

lethalsassonic

iTrader: (1)

It seems to run on the hot side, like 250-290 degrees.

token

your to lean -

I know you go by the "book" but what i would do, is reset the needles to the factory settings and retune

pyromania

iTrader: (18)

I know for a fact that the VG has a small cooling head, and sometimes the body covers the whole cooling head or leaves very little sticking out. That maybe part of your problem. You may also have the engine a bit lean.

jrwoodchuck

you will have more airflow to the engine with the body off, so if you think about it, the body will slow the airflow around the engine and it will get hotter. i would try riching the engine up 1 hour from ware you tuned it without the body. for this reason i always tune with the body on, then dremel hole in the body so can get to the high speed screw.

RETRO RC

Dude NEVER EVER clean and reuse air filters all your doing is pushing the fine particles further into the filter. the price of a new filter is far cheaper than risking the price of a new engine.

also like it has been said before it sounds like the body is just reducing air flow
resulting in overheating.

Zerodefect

I had that problem to. My needles were set too far apart. Something like I was way off, too rich on the high end and I compensated by accidentally running the low end too lean and vise versa.

If i screwed it up bad enough, the car would run ok, but was sensitive to everything especially the body being off or on.

I reset to factory and retuned, this time with a less heavy hand on the needles. With the right tune it went away give or take 20 degrees.

lethalsassonic

iTrader: (1)

Wow, I didn't know that about air filters, I'm gonna toss em when they get dirty now!