Tuning dilemas continue....

[militarymaxx]

Went to the track today and after two full tanks my buggy still hadn't seen the ground yet. Even after putting everything back to what I was told was factory, all it would do is idle. It idles just fine but at idle it spits fuel and when I try to crack the throttle open it pukes smokes, chokes and dies. I had the LSN at 2.5 tuns out with the HSN 3.5 out. One guy cam by and gave me his two cents worth and I have to admit, it ran much better than it had all day. He said that a good starting point for the LSN is ccw flush with the collar. This tells me that it was too lean and my rich idle setting was due to an incorrect HSN setting. He also said that the big blocks don't need much in the way of HSN settings. He thought my 3.5 turns out was way to much and he also asked how large were my adjustment increments were and I said 1/8 and again, he said that was to much. That he suggested 1/16 at a time. Sorry for the length of this, been a bad day. Anyways does any of the above sound true ? Specifically the LSN being flush out.

 

[El Pirata]

What kind of engine? For the most part all the engines I have tinkered with the stock LSN and MSN are set at flush, or some sort of # turns that make the needles appear to be close enough to flush.

 

[militarymaxx]

It's the stock engine in the GS Storm .21.

 

[Çh®i§tiªñ]

Its very common to have an LSN sit flush with the housing itself. Also, adjusting in 1/16th turns is the best way to find your 'sweet' spot once you get dialed in. However, when trying to find your ballpark settings I would work with 1/8th turns until you find the ballpark.

Check all your screws and make sure they are tight on the engine. Especially the head screws. Dont want any leaks.

The carb can be the biggest leaker of them all. Pull it, reseat it and tighten (DO NOT OVER TIGHTEN!)

When I get into a crunch, I usually go back to factory settings, turn the LSN in 1/4 turn from there and the HSN in 1/4 turn as well. Always set the idle by looking into the carb for the size opening you desire. Usually around 2mm-3mm.

I found this to work well with ANY engine which is why I'm giving you my take on it. I havent worked with the one you have, but, I have worked on a few different .21's now and it has gotten me there every time.

Hope this helps somewhat.