Originally Posted by
Babygrand48
Ok my head hurts now from reading the last 50 pages or so. I believe I read on here(can't remember when) that someone is using fuel tubing as an o ring replacement? I have a stock 7port believe gen 4 or 5. I run on 20% with only 1 copper shim(plus button) i believe .4mm total as i recall. Are the carb settings given in these last few posts ok to start with on 20%? It seems that most of the posts refer to 30% I'm using 20% as I was told that it is easier on the engine. Is this correct, my boys and I don't drive well enough yet to need the extra power of 30%. Just looking for reliability and ease in tuning. We run OD plugs 97T but just ordered 77T's also and engine usually only gets to 190 or so.
Hi Babygrand48, welcome onboard the thread. Wow, you must be totally warped after reading 50 pages of our ramblings
20% is fine, and is a little easier on the motor overall. Tuning won't differ too much. You normally will run a little richer with less nitro content as opposed to settings for say 25%, but it's only a small change.
With 20% the warmer 77T's will probably go better. Should give a better idle and smoother running with the 20% fuel. You could also try an OS P5 too (med/hot).
Shimming sounds OK at .4mm total for the 20% with med/hot plug.
The fuel tubing O rings work great (that was me). If you can find the post about 5 - 10 pages back it tells you all the details. If not, PM me.
