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 last club race ...with the tuned grp ////i was starting up at the table after pre heating with heat gun ...a buddy came over and said ...man you need to idle that thing up ....i said give it time man ...see what happens on the track ....they are cold natured and take a good 3 minutes of run before a heat to get to operating temprature .....after the 5 minute heat with 3 minute warm up ...it came off at 195 and was not lacking in any way ...give these motors time to warm up and get going and they are golden
dont over react when you first fire them up ....after the 15 minute main ...i got 2nd place ...it was 195 and again had enough power pulling my x2 to clear jumps and scramble down a long back straight ....
Originally Posted by
Frank L
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.
+1000....havent had the trouble with o-rings yet ....