Originally Posted by
rcboxer
Well I ran my new, used tuned grp today. Love the power band
I do have a question though, I had my motor running good at around 210 degrees. I finished my tank let it cool down and then would run it again. Man it would run SO rich. I didn't touch the needle setting at all either. My motor has about a gallon on it and its still very tight. Do these motors take a long time to get warmed up compared to other motors? I mean are they cold blooded? thanks
My experience is yes cold blooded, use a heat gun to warm the block and head temp to 180 or above when starting, this helps. I have also had problems with the o-rings on the idle, LSN, & HSN getting old and not holding the position. Easy fix is to replace the o-rings. I even had one GRP that was giving an inconsistent tune where fuel was pooling up and out the HSN without the needle moving, replaced the o-rings and problem was solved. In my opinion I always warm the engine up for 3-5 mins before my heat/ main, it just runs better that way. So yes cold blooded but worth the trouble once its hot and tuned its on fire.